Configure

#! /bin/sh
#
# If these # comments don't work, trim them. Don't worry about any other
# shell scripts, Configure will trim # comments from them for you.
#
# (If you are trying to port this package to a machine without sh,
# I would suggest you have a look at the prototypical config_h.SH file
# and edit it to reflect your system. Some packages may include samples
# of config.h for certain machines, so you might look for one of those.)
#
# Yes, you may rip this off to use in other distribution packages. This
# script belongs to the public domain and cannot be copyrighted.
#
# Note: this Configure script was generated automatically by the tool
# called "metaconfig". Rather than working with this copy of Configure,
# you should use metaconfig. Perl uses a modified version of this
# tool, and this, together with the metaconfig units, are available
# in the git repository:
#    $ git clone https://github.com/Perl/metaconfig metaconfig
# The original dist package (including metaconfig) is available on github:
#    $ git clone https://github.com/rmanfredi/dist.git dist-git
#
# Though this script was generated by metaconfig from metaunits, it is
# OK to send patches against Configure itself (but not to commit them
# to blead). It's up to
# the Configure maintainers to backport the patch to the metaunits if it
# is accepted. Exceptions to this rule, and more information, is in
# Porting/pumpkin.pod.

# Generated using [metaconfig 3.5 PL0]
# with additional metaconfig patches from https://github.com/Perl/metaconfig

cat >c1$$ <<EOF
ARGGGHHHH!!!!!

SCO csh still thinks true is false.  Write to SCO today and tell them that next
year Configure ought to "rm /bin/csh" unless they fix their blasted shell. :-)

(Actually, Configure ought to just patch csh in place.  Hmm.  Hmmmmm.  All
we'd have to do is go in and swap the && and || tokens, wherever they are.)

[End of diatribe. We now return you to your regularly scheduled programming...]
EOF
cat >c2$$ <<EOF

OOPS!  You naughty creature!  You didn't run Configure with sh!
I will attempt to remedy the situation by running sh for you...
EOF

true || cat c1$$ c2$$
true || exec sh $0 $argv:q

(exit $?0) || cat c2$$
(exit $?0) || exec sh $0 $argv:q
rm -f c1$$ c2$$

if test -f /dev/cputype -a -f /dev/drivers -a -f /dev/osversion; then
	cat <<EOF
***
*** I'm sorry but this system looks like Plan 9 and Plan 9 doesn't do
*** Configure that well.  (Plan 9 is close to UNIX but not close enough.)
*** Please read the README.plan9 for further instructions.
*** Cannot continue, aborting.
***
EOF
	exit 1
fi

if test -f /sys/utilities/MultiView ; then
	# AmigaOS, test -c for /dev/null is not useful
	:
elif test ! -c /dev/null ; then
	cat <<EOF
***
*** I'm sorry, but /dev/null appears to be a file rather than a device.
*** Please consult your operating sytem's notes for making a device
*** in /dev.
*** Cannot continue, aborting.
***
EOF
	exit 1
fi

: compute my invocation name
me=$0
case "$0" in
*/*)
	me=`echo $0 | sed -e 's!.*/\(.*\)!\1!' 2>/dev/null`
	test "$me" || me=$0
	;;
esac

: Proper separator for the PATH environment variable
p_=:
: On OS/2 this directory should exist if this is not floppy only system ":-]"
if test -d c:/. || ( uname -a | grep -i 'os\(/\|\)2' 2>&1 ) 2>&1 >/dev/null ; then
	if test -n "$OS2_SHELL"; then
		p_=\;
		PATH=`cmd /c "echo %PATH%" | tr '\\\\' / `
		OS2_SHELL=`cmd /c "echo %OS2_SHELL%" | tr '\\\\' / | tr '[A-Z]' '[a-z]'`
		is_os2=yes
	elif test -n "$DJGPP"; then
		case "X${MACHTYPE:-nonesuchmach}" in
		*cygwin|*msys) ;;
		*) p_=\; ;;
		esac
	fi
fi

: Proper PATH setting
paths='/bin /usr/bin /usr/local/bin /usr/ucb /usr/local /usr/lbin'
paths="$paths /opt/bin /opt/local/bin /opt/local /opt/lbin"
paths="$paths /usr/5bin /etc /usr/gnu/bin /usr/new /usr/new/bin /usr/nbin"
paths="$paths /opt/gnu/bin /opt/new /opt/new/bin /opt/nbin"
paths="$paths /sys5.3/bin /sys5.3/usr/bin /bsd4.3/bin /bsd4.3/usr/ucb"
paths="$paths /bsd4.3/usr/bin /usr/bsd /bsd43/bin /opt/ansic/bin /usr/ccs/bin"
paths="$paths /etc /usr/lib /usr/ucblib /lib /usr/ccs/lib"
paths="$paths /sbin /usr/sbin /usr/libexec"
paths="$paths /system/gnu_library/bin"

for p in $paths
do
	case "$p_$PATH$p_" in
	*$p_$p$p_*) ;;
	*) test -d $p && PATH=$PATH$p_$p ;;
	esac
done

PATH=.$p_$PATH
export PATH

: shall we be using ksh?
inksh=''
needksh=''
avoidksh=''
newsh=/bin/ksh
changesh=''
if (PATH=.; alias -x) >/dev/null 2>&1; then
		inksh=true
fi
if test -f /hp-ux -a -f /bin/ksh; then
	needksh='to avoid sh bug in "here document" expansion'
fi
if test -d /usr/lpp -a -f /usr/bin/bsh -a -f /usr/bin/uname; then
	if test X`/usr/bin/uname -v` = X4; then
		avoidksh="to avoid AIX 4's /bin/sh"
		newsh=/usr/bin/bsh
	fi
fi
if test -f /osf_boot -a -f /usr/sbin/setld; then
	if test X`/usr/bin/uname -s` = XOSF1; then
		avoidksh="to avoid Digital UNIX' ksh"
		newsh=/bin/sh
		unset BIN_SH
	fi
fi
case "$inksh/$needksh" in
/[a-z]*)
		ENV=''
		changesh=true
		reason="$needksh"
	;;
esac
case "$inksh/$avoidksh" in
true/[a-z]*)
	changesh=true
	reason="$avoidksh"
	;;
esac
case "$inksh/$needksh-$avoidksh-" in
true/--)
		cat <<EOM
(I see you are using the Korn shell.  Some ksh's blow up on $me,
mainly on older exotic systems.  If yours does, try the Bourne shell instead.)
EOM
	;;
esac
case "$changesh" in
true)
	export newsh
	echo "(Feeding myself to $newsh $reason.)"
	case "$0" in
	Configure|*/Configure) exec $newsh $0 "$@";;
	*) exec $newsh Configure "$@";;
	esac
	;;
esac
test -x "${newsh}" || unset newsh

: if needed, set CDPATH to a harmless value that is not chatty
: avoid bash 2.02 problems with empty CDPATH.
case "$CDPATH" in
'')	;;
*)	case "$SHELL" in
	*bash*) CDPATH='.' ;;
	*) CDPATH='' ;;
	esac
	;;
esac

: Configure runs within the UU subdirectory
test -d UU || mkdir UU
cd UU && rm -f ./*

ccname=''
ccversion=''
ccsymbols=''
cppccsymbols=''
cppsymbols=''
from=''
hostgenerate=''
hostosname=''
hostperl=''
run=''
targetarch=''
targetdir=''
targetenv=''
targethost=''
targetmkdir=''
targetport=''
to=''
usecrosscompile=''
extern_C=''
mistrustnm=''
usedevel=''
perllibs=''
dynamic_ext=''
extensions=''
known_extensions=''
nonxs_ext=''
static_ext=''
uselanginfo=''
useopcode=''
useposix=''
extras=''
d_bsd=''
d_eunice=''
d_xenix=''
eunicefix=''
ar=''
awk=''
bash=''
bison=''
byacc=''
cat=''
chgrp=''
chmod=''
chown=''
comm=''
compress=''
cp=''
cpio=''
cpp=''
csh=''
date=''
echo=''
egrep=''
emacs=''
expr=''
find=''
flex=''
gmake=''
grep=''
gzip=''
inews=''
ksh=''
less=''
line=''
lint=''
ln=''
lp=''
lpr=''
ls=''
mail=''
mailx=''
make=''
mkdir=''
more=''
mv=''
nm=''
nroff=''
perl=''
pg=''
pmake=''
pr=''
rm=''
rmail=''
sed=''
sendmail=''
shar=''
sleep=''
smail=''
sort=''
submit=''
tail=''
tar=''
tbl=''
tee=''
test=''
touch=''
tr=''
troff=''
uname=''
uniq=''
uuname=''
vi=''
zcat=''
zip=''
full_ar=''
full_sed=''
libswanted=''
hint=''
myuname=''
osname=''
osvers=''
Author=''
Date=''
Header=''
Id=''
Locker=''
Log=''
RCSfile=''
Revision=''
Source=''
State=''
sysroot=''
_a=''
_exe=''
_o=''
archobjs=''
exe_ext=''
firstmakefile=''
lib_ext=''
obj_ext=''
path_sep=''
rm_try=''
afs=''
afsroot=''
alignbytes=''
archlib=''
archlibexp=''
d_archlib=''
installarchlib=''
archname=''
myarchname=''
useversionedarchname=''
d_atolf=''
d_atoll=''
baserev=''
bin=''
binexp=''
initialinstalllocation=''
installbin=''
userelocatableinc=''
byteorder=''
cc=''
ccflags=''
cppflags=''
ldflags=''
lkflags=''
locincpth=''
optimize=''
cf_email=''
cf_by=''
cf_time=''
charbits=''
charsize=''
compiler_warning=''
contains=''
cpp_stuff=''
cpplast=''
cppminus=''
cpprun=''
cppstdin=''
d__fwalk=''
d_accept4=''
d_access=''
d_accessx=''
d_acosh=''
d_aintl=''
d_alarm=''
asctime_r_proto=''
d_asctime_r=''
d_asinh=''
d_atanh=''
d_attribute_always_inline=''
d_attribute_deprecated=''
d_attribute_format=''
d_attribute_malloc=''
d_attribute_nonnull=''
d_attribute_noreturn=''
d_attribute_pure=''
d_attribute_unused=''
d_attribute_visibility=''
d_attribute_warn_unused_result=''
d_printf_format_null=''
d_backtrace=''
d_non_int_bitfields=''
d_builtin_choose_expr=''
d_builtin_expect=''
d_builtin_add_overflow=''
d_builtin_mul_overflow=''
d_builtin_sub_overflow=''
d_c99_variadic_macros=''
d_casti32=''
castflags=''
d_castneg=''
d_cbrt=''
d_chown=''
d_chroot=''
d_chsize=''
d_class=''
d_clearenv=''
d_closedir=''
d_void_closedir=''
d_cmsghdr_s=''
d_copysign=''
d_copysignl=''
d_cplusplus=''
cryptlib=''
d_crypt=''
crypt_r_proto=''
d_crypt_r=''
d_csh=''
full_csh=''
d_ctermid=''
ctermid_r_proto=''
d_ctermid_r=''
ctime_r_proto=''
d_ctime_r=''
d_cuserid=''
d_dbminitproto=''
d_difftime=''
d_dir_dd_fd=''
d_dirfd=''
d_dladdr=''
d_dlerror=''
d_dlopen=''
d_dlsymun=''
d_dosuid=''
d_suidsafe=''
d_drand48_r=''
drand48_r_proto=''
d_drand48proto=''
d_dup2=''
d_dup3=''
d_eaccess=''
d_endgrent=''
d_endgrent_r=''
endgrent_r_proto=''
d_endhent=''
d_endhostent_r=''
endhostent_r_proto=''
d_endnent=''
d_endnetent_r=''
endnetent_r_proto=''
d_endpent=''
d_endprotoent_r=''
endprotoent_r_proto=''
d_endpwent=''
d_endpwent_r=''
endpwent_r_proto=''
d_endsent=''
d_endservent_r=''
endservent_r_proto=''
d_erf=''
d_erfc=''
d_exp2=''
d_expm1=''
d_faststdio=''
d_fchdir=''
d_fchmod=''
d_fchown=''
d_fcntl=''
d_fcntl_can_lock=''
d_fd_macros=''
d_fd_set=''
d_fds_bits=''
d_fdclose=''
d_fdim=''
d_fdopendir=''
d_fegetround=''
d_ffs=''
d_ffsl=''
d_fgetpos=''
d_finite=''
d_finitel=''
d_flexfnam=''
d_flock=''
d_flockproto=''
d_fma=''
d_fmax=''
d_fmin=''
d_fork=''
d_fp_class=''
d_fp_classl=''
d_fpclass=''
d_fp_classify=''
d_fpclassify=''
d_fpclassl=''
d_fpgetround=''
d_fpos64_t=''
d_frexpl=''
d_fs_data_s=''
d_fchmodat=''
d_linkat=''
d_openat=''
d_renameat=''
d_unlinkat=''
d_fseeko=''
d_fsetpos=''
d_fstatfs=''
d_fsync=''
d_ftello=''
d_ftime=''
d_gettimeod=''
d_futimes=''
d_gai_strerror=''
d_Gconvert=''
d_getaddrinfo=''
d_getcwd=''
d_getentropy=''
d_getenv_preserves_other_thread=''
d_getespwnam=''
d_getfsstat=''
d_getgrent=''
d_getgrent_r=''
getgrent_r_proto=''
d_getgrgid_r=''
getgrgid_r_proto=''
d_getgrnam_r=''
getgrnam_r_proto=''
d_getgrps=''
d_gethbyaddr=''
d_gethbyname=''
d_gethent=''
aphostname=''
d_gethname=''
d_phostname=''
d_uname=''
d_gethostbyaddr_r=''
gethostbyaddr_r_proto=''
d_gethostbyname_r=''
gethostbyname_r_proto=''
d_gethostent_r=''
gethostent_r_proto=''
d_gethostprotos=''
d_getitimer=''
d_getlogin=''
d_getlogin_r=''
getlogin_r_proto=''
d_getmnt=''
d_getmntent=''
d_getnameinfo=''
d_getnbyaddr=''
d_getnbyname=''
d_getnent=''
d_getnetbyaddr_r=''
getnetbyaddr_r_proto=''
d_getnetbyname_r=''
getnetbyname_r_proto=''
d_getnetent_r=''
getnetent_r_proto=''
d_getnetprotos=''
d_getpagsz=''
d_getpent=''
d_getpgid=''
d_getpgrp2=''
d_bsdgetpgrp=''
d_getpgrp=''
d_getppid=''
d_getprior=''
d_getpbyname=''
d_getpbynumber=''
d_getprotobyname_r=''
getprotobyname_r_proto=''
d_getprotobynumber_r=''
getprotobynumber_r_proto=''
d_getprotoent_r=''
getprotoent_r_proto=''
d_getprotoprotos=''
d_getprpwnam=''
d_getpwent=''
d_getpwent_r=''
getpwent_r_proto=''
d_getpwnam_r=''
getpwnam_r_proto=''
d_getpwuid_r=''
getpwuid_r_proto=''
d_getsent=''
d_getservbyname_r=''
getservbyname_r_proto=''
d_getservbyport_r=''
getservbyport_r_proto=''
d_getservent_r=''
getservent_r_proto=''
d_getservprotos=''
d_getspnam=''
d_getspnam_r=''
getspnam_r_proto=''
d_getsbyname=''
d_getsbyport=''
d_gmtime_r=''
gmtime_r_proto=''
d_gnulibc=''
gnulibc_version=''
d_hasmntopt=''
d_htonl=''
d_hypot=''
d_ilogb=''
d_ilogbl=''
d_inetaton=''
d_inetntop=''
d_inetpton=''
d_int64_t=''
d_isascii=''
d_isblank=''
d_isfinite=''
d_isfinitel=''
d_isinf=''
d_isinfl=''
d_isless=''
d_isnan=''
d_isnanl=''
d_isnormal=''
d_j0=''
d_j0l=''
d_killpg=''
d_lc_monetary_2008=''
d_lchown=''
d_ldbl_dig=''
d_lgamma=''
d_lgamma_r=''
d_libm_lib_version=''
d_link=''
d_llrint=''
d_llrintl=''
d_llround=''
d_llroundl=''
d_localeconv_l=''
d_localtime_r=''
d_localtime_r_needs_tzset=''
localtime_r_proto=''
d_locconv=''
d_lockf=''
d_log1p=''
d_log2=''
d_logb=''
d_ldexpl=''
d_long_double_style_ieee=''
d_long_double_style_ieee_doubledouble=''
d_long_double_style_ieee_extended=''
d_long_double_style_ieee_std=''
d_long_double_style_vax=''
d_longdbl=''
longdblkind=''
longdblsize=''
d_longlong=''
longlongsize=''
d_lrint=''
d_lrintl=''
d_lround=''
d_lroundl=''
d_lseekproto=''
d_lstat=''
d_madvise=''
d_malloc_good_size=''
d_malloc_size=''
d_malloc_usable_size=''
d_mblen=''
d_mbrlen=''
d_mbrtowc=''
d_mbstowcs=''
d_mbtowc=''
d_memmem=''
d_memrchr=''
d_mkdir=''
d_mkdtemp=''
d_mkfifo=''
d_mkostemp=''
d_mkstemp=''
d_mkstemps=''
d_mktime=''
d_mmap=''
mmaptype=''
d_modfl=''
d_modflproto=''
d_mprotect=''
d_msg=''
d_msgctl=''
d_msgget=''
d_msghdr_s=''
d_msgrcv=''
d_msgsnd=''
d_msync=''
d_munmap=''
d_nan=''
d_nanosleep=''
d_nearbyint=''
d_duplocale=''
d_freelocale=''
d_newlocale=''
d_querylocale=''
d_uselocale=''
i_xlocale=''
xlocale_needed=''
d_nextafter=''
d_nexttoward=''
d_nice=''
d_nl_langinfo=''
d_nl_langinfo_l=''
d_off64_t=''
d_open3=''
d_fpathconf=''
d_pathconf=''
d_pause=''
d_pipe2=''
d_pipe=''
d_poll=''
d_portable=''
d_prctl=''
d_prctl_set_name=''
d_procselfexe=''
procselfexe=''
d_old_pthread_create_joinable=''
old_pthread_create_joinable=''
d_pthread_atfork=''
d_pthread_attr_setscope=''
d_pthread_yield=''
d_sched_yield=''
sched_yield=''
d_ptrdiff_t=''
d_qgcvt=''
d_random_r=''
random_r_proto=''
d_readdir64_r=''
readdir64_r_proto=''
d_readdir=''
d_rewinddir=''
d_seekdir=''
d_telldir=''
d_readdir_r=''
readdir_r_proto=''
d_readlink=''
d_readv=''
d_recvmsg=''
d_re_comp=''
d_regcmp=''
d_regcomp=''
d_remainder=''
d_remquo=''
d_rename=''
d_rint=''
d_rmdir=''
d_round=''
d_sbrkproto=''
d_scalbn=''
d_scalbnl=''
d_select=''
d_sem=''
d_semctl=''
d_semget=''
d_semop=''
d_sendmsg=''
d_setegid=''
d_setenv=''
d_seteuid=''
d_setgrent=''
d_setgrent_r=''
setgrent_r_proto=''
d_setgrps=''
d_sethent=''
d_sethostent_r=''
sethostent_r_proto=''
d_setitimer=''
d_setlinebuf=''
d_has_C_UTF8=''
d_setlocale=''
d_setlocale_accepts_any_locale_name=''
d_setlocale_r=''
setlocale_r_proto=''
d_setnent=''
d_setnetent_r=''
setnetent_r_proto=''
d_setpent=''
d_setpgid=''
d_setpgrp2=''
d_bsdsetpgrp=''
d_setpgrp=''
d_setprior=''
d_setproctitle=''
d_setprotoent_r=''
setprotoent_r_proto=''
d_setpwent=''
d_setpwent_r=''
setpwent_r_proto=''
d_setregid=''
d_setresgid=''
d_setresuid=''
d_setreuid=''
d_setrgid=''
d_setruid=''
d_setsent=''
d_setservent_r=''
setservent_r_proto=''
d_setsid=''
d_setvbuf=''
d_shm=''
d_shmat=''
d_shmatprototype=''
shmattype=''
d_shmctl=''
d_shmdt=''
d_shmget=''
d_sigaction=''
d_siginfo_si_addr=''
d_siginfo_si_band=''
d_siginfo_si_errno=''
d_siginfo_si_fd=''
d_siginfo_si_pid=''
d_siginfo_si_status=''
d_siginfo_si_uid=''
d_siginfo_si_value=''
d_signbit=''
d_sigprocmask=''
d_sigsetjmp=''
usesitecustomize=''
d_snprintf=''
d_vsnprintf=''
d_sockatmark=''
d_sockatmarkproto=''
d_ip_mreq=''
d_ip_mreq_source=''
d_ipv6_mreq=''
d_ipv6_mreq_source=''
d_msg_ctrunc=''
d_msg_dontroute=''
d_msg_oob=''
d_msg_peek=''
d_msg_proxy=''
d_oldsock=''
d_scm_rights=''
d_sin6_scope_id=''
d_sockaddr_in6=''
d_sockaddr_sa_len=''
d_sockaddr_storage=''
d_socket=''
d_sockpair=''
sockethdr=''
socketlib=''
d_socklen_t=''
d_socks5_init=''
d_sqrtl=''
d_srand48_r=''
srand48_r_proto=''
d_srandom_r=''
srandom_r_proto=''
d_sresgproto=''
d_sresuproto=''
d_stat=''
d_statblks=''
d_statfs_f_flags=''
d_statfs_s=''
d_static_inline=''
perl_static_inline=''
d_fstatvfs=''
d_statvfs=''
d_stdio_cnt_lval=''
d_stdio_ptr_lval=''
d_stdio_ptr_lval_nochange_cnt=''
d_stdio_ptr_lval_sets_cnt=''
d_stdiobase=''
d_stdstdio=''
stdio_base=''
stdio_bufsiz=''
stdio_cnt=''
stdio_filbuf=''
stdio_ptr=''
d_strcoll=''
d_sysernlst=''
d_syserrlst=''
d_strerror_l=''
d_strerror_r=''
strerror_r_proto=''
d_strftime=''
d_strlcat=''
d_strlcpy=''
d_strnlen=''
d_strtod=''
d_strtod_l=''
d_strtol=''
d_strtold=''
d_strtold_l=''
d_strtoll=''
d_strtoq=''
d_strtoul=''
d_strtoull=''
d_strtouq=''
d_strxfrm=''
d_strxfrm_l=''
d_symlink=''
d_syscall=''
d_syscallproto=''
d_sysconf=''
d_system=''
d_tcgetpgrp=''
d_tcsetpgrp=''
d_telldirproto=''
d_tgamma=''
d_thread_local=''
perl_thread_local=''
d_time=''
timetype=''
d_asctime64=''
d_ctime64=''
d_difftime64=''
d_gmtime64=''
d_localtime64=''
d_mktime64=''
d_timegm=''
clocktype=''
d_times=''
d_tmpnam_r=''
tmpnam_r_proto=''
d_towlower=''
d_towupper=''
d_trunc=''
d_truncate=''
d_truncl=''
d_ttyname_r=''
ttyname_r_proto=''
d_tzname=''
d_u32align=''
d_ualarm=''
d_umask=''
d_semctl_semid_ds=''
d_semctl_semun=''
d_union_semun=''
d_unordered=''
d_unsetenv=''
d_usleep=''
d_usleepproto=''
d_ustat=''
d_pseudofork=''
d_vfork=''
usevfork=''
d_voidsig=''
signal_t=''
d_wait4=''
d_waitpid=''
d_wcrtomb=''
d_wcscmp=''
d_wcstombs=''
d_wcsxfrm=''
d_wctomb=''
d_writev=''
default_inc_excludes_dot=''
d_perl_lc_all_category_positions_init=''
d_perl_lc_all_separator=''
d_perl_lc_all_uses_name_value_pairs=''
perl_lc_all_category_positions_init=''
perl_lc_all_separator=''
dlext=''
bin_ELF=''
cccdlflags=''
ccdlflags=''
dlsrc=''
ld=''
ld_can_script=''
lddlflags=''
usedl=''
doublesize=''
dtraceobject=''
dtracexnolibs=''
ebcdic=''
fflushNULL=''
fflushall=''
fpossize=''
fpostype=''
gccansipedantic=''
gccosandvers=''
gccversion=''
gidformat=''
gidsign=''
gidsize=''
gidtype=''
groupstype=''
h_fcntl=''
h_sysfile=''
html1dir=''
html1direxp=''
installhtml1dir=''
html3dir=''
html3direxp=''
installhtml3dir=''
i_arpainet=''
i_bfd=''
i_crypt=''
db_hashtype=''
db_prefixtype=''
db_version_major=''
db_version_minor=''
db_version_patch=''
i_db=''
i_dbm=''
i_rpcsvcdbm=''
d_dirnamlen=''
direntrytype=''
i_dirent=''
i_dlfcn=''
i_execinfo=''
i_fcntl=''
i_fenv=''
i_fp=''
i_fp_class=''
i_gdbm=''
d_grpasswd=''
i_grp=''
i_ieeefp=''
i_inttypes=''
i_langinfo=''
i_libutil=''
i_locale=''
i_machcthr=''
i_malloc=''
i_mallocmalloc=''
i_mntent=''
d_gdbm_ndbm_h_uses_prototypes=''
d_gdbmndbm_h_uses_prototypes=''
d_ndbm=''
d_ndbm_h_uses_prototypes=''
i_gdbm_ndbm=''
i_gdbmndbm=''
i_ndbm=''
i_netdb=''
i_neterrno=''
i_netinettcp=''
i_niin=''
i_sysin=''
i_poll=''
i_prot=''
i_pthread=''
d_pwage=''
d_pwchange=''
d_pwclass=''
d_pwcomment=''
d_pwexpire=''
d_pwgecos=''
d_pwpasswd=''
d_pwquota=''
i_pwd=''
i_quadmath=''
i_shadow=''
i_socks=''
i_stdbool=''
i_stdckdint=''
i_stdint=''
i_stdlib=''
i_sunmath=''
i_sysaccess=''
i_sysdir=''
i_sysfile=''
d_voidtty=''
i_bsdioctl=''
i_sysfilio=''
i_sysioctl=''
i_syssockio=''
i_syslog=''
i_sysmman=''
i_sysmode=''
i_sysmount=''
i_sysndir=''
i_sysparam=''
i_syspoll=''
i_sysrandom=''
i_sysresrc=''
i_syssecrt=''
i_sysselct=''
i_sysstat=''
i_sysstatfs=''
i_sysstatvfs=''
i_syssyscall=''
i_systimes=''
i_systypes=''
i_sysuio=''
i_sysun=''
i_sysutsname=''
i_sysvfs=''
i_syswait=''
i_sgtty=''
i_termio=''
i_termios=''
d_tm_tm_gmtoff=''
d_tm_tm_zone=''
i_systime=''
i_systimek=''
i_time=''
timeincl=''
i_unistd=''
i_ustat=''
i_utime=''
i_vfork=''
i_wchar=''
i_wctype=''
d_inc_version_list=''
inc_version_list=''
inc_version_list_init=''
doubleinfbytes=''
doublenanbytes=''
longdblinfbytes=''
longdblnanbytes=''
installprefix=''
installprefixexp=''
installstyle=''
installusrbinperl=''
intmaxsize=''
intsize=''
longsize=''
shortsize=''
issymlink=''
libc=''
ldlibpthname=''
libperl=''
shrpenv=''
useshrplib=''
glibpth=''
incpth=''
libpth=''
loclibpth=''
plibpth=''
xlibpth=''
ignore_versioned_solibs=''
libs=''
libsdirs=''
libsfiles=''
libsfound=''
libspath=''
lns=''
d_PRIEUldbl=''
d_PRIFUldbl=''
d_PRIGUldbl=''
d_PRIeldbl=''
d_PRIfldbl=''
d_PRIgldbl=''
d_SCNfldbl=''
d_double_has_inf=''
d_double_has_nan=''
d_double_has_negative_zero=''
d_double_has_subnormals=''
d_double_style_cray=''
d_double_style_ibm=''
d_double_style_ieee=''
d_double_style_vax=''
doublekind=''
sPRIEUldbl=''
sPRIFUldbl=''
sPRIGUldbl=''
sPRIeldbl=''
sPRIfldbl=''
sPRIgldbl=''
sSCNfldbl=''
lseeksize=''
lseektype=''
make_set_make=''
d_mymalloc=''
freetype=''
mallocobj=''
mallocsrc=''
malloctype=''
usemallocwrap=''
usemymalloc=''
installman1dir=''
man1dir=''
man1direxp=''
man1ext=''
installman3dir=''
man3dir=''
man3direxp=''
man3ext=''
doublemantbits=''
longdblmantbits=''
nvmantbits=''
modetype=''
multiarch=''
mydomain=''
myhostname=''
phostname=''
c=''
n=''
d_eofnblk=''
eagain=''
o_nonblock=''
rd_nodata=''
need_va_copy=''
netdb_hlen_type=''
netdb_host_type=''
netdb_name_type=''
netdb_net_type=''
groupcat=''
hostcat=''
passcat=''
orderlib=''
ranlib=''
d_perl_otherlibdirs=''
otherlibdirs=''
package=''
spackage=''
pager=''
api_revision=''
api_subversion=''
api_version=''
api_versionstring=''
patchlevel=''
perl_patchlevel=''
revision=''
subversion=''
version=''
version_patchlevel_string=''
perl5=''
perladmin=''
perlpath=''
i32dformat=''
u32XUformat=''
u32oformat=''
u32uformat=''
u32xformat=''
d_nv_preserves_uv=''
d_nv_zero_is_allbits_zero=''
i16size=''
i16type=''
i32size=''
i32type=''
i64size=''
i64type=''
i8size=''
i8type=''
ivsize=''
ivtype=''
nv_overflows_integers_at=''
nv_preserves_uv_bits=''
nvsize=''
nvtype=''
u16size=''
u16type=''
u32size=''
u32type=''
u64size=''
u64type=''
u8size=''
u8type=''
uvsize=''
uvtype=''
ivdformat=''
nvEUformat=''
nvFUformat=''
nvGUformat=''
nveformat=''
nvfformat=''
nvgformat=''
uvXUformat=''
uvoformat=''
uvuformat=''
uvxformat=''
pidtype=''
prefix=''
prefixexp=''
installprivlib=''
privlib=''
privlibexp=''
ptrsize=''
d_PRIXU64=''
d_PRId64=''
d_PRIi64=''
d_PRIo64=''
d_PRIu64=''
d_PRIx64=''
sPRIXU64=''
sPRId64=''
sPRIi64=''
sPRIo64=''
sPRIu64=''
sPRIx64=''
d_quad=''
quadkind=''
quadtype=''
uquadtype=''
drand01=''
randbits=''
randfunc=''
randseedtype=''
seedfunc=''
installscript=''
scriptdir=''
scriptdirexp=''
selectminbits=''
selecttype=''
sh=''
targetsh=''
sig_count=''
sig_name=''
sig_name_init=''
sig_num=''
sig_num_init=''
sig_size=''
d_sitearch=''
installsitearch=''
sitearch=''
sitearchexp=''
installsitebin=''
sitebin=''
sitebinexp=''
installsitehtml1dir=''
sitehtml1dir=''
sitehtml1direxp=''
installsitehtml3dir=''
sitehtml3dir=''
sitehtml3direxp=''
installsitelib=''
sitelib=''
sitelib_stem=''
sitelibexp=''
installsiteman1dir=''
siteman1dir=''
siteman1direxp=''
installsiteman3dir=''
siteman3dir=''
siteman3direxp=''
siteprefix=''
siteprefixexp=''
installsitescript=''
sitescript=''
sitescriptexp=''
sizesize=''
sizetype=''
d_libname_unique=''
so=''
socksizetype=''
sharpbang=''
shsharp=''
spitshell=''
src=''
ssizetype=''
st_dev_sign=''
st_dev_size=''
st_ino_sign=''
st_ino_size=''
startperl=''
startsh=''
stdchar=''
d_stdio_stream_array=''
stdio_stream_array=''
sysman=''
sGMTIME_max=''
sGMTIME_min=''
sLOCALTIME_max=''
sLOCALTIME_min=''
trnl=''
uidformat=''
uidsign=''
uidsize=''
uidtype=''
archname64=''
use64bitall=''
use64bitint=''
usecbacktrace=''
usedefaultstrict=''
dtrace=''
usedtrace=''
usefaststdio=''
usekernprocpathname=''
ccflags_uselargefiles=''
ldflags_uselargefiles=''
libswanted_uselargefiles=''
uselargefiles=''
uselongdouble=''
usemorebits=''
usemultiplicity=''
nm_opt=''
nm_so_opt=''
runnm=''
usenm=''
usensgetexecutablepath=''
useperlio=''
usequadmath=''
usesocks=''
d_oldpthreads=''
useithreads=''
usereentrant=''
usethreads=''
incpath=''
mips_type=''
usrinc=''
d_vendorarch=''
installvendorarch=''
vendorarch=''
vendorarchexp=''
d_vendorbin=''
installvendorbin=''
vendorbin=''
vendorbinexp=''
installvendorhtml1dir=''
vendorhtml1dir=''
vendorhtml1direxp=''
installvendorhtml3dir=''
vendorhtml3dir=''
vendorhtml3direxp=''
d_vendorlib=''
installvendorlib=''
vendorlib=''
vendorlib_stem=''
vendorlibexp=''
installvendorman1dir=''
vendorman1dir=''
vendorman1direxp=''
installvendorman3dir=''
vendorman3dir=''
vendorman3direxp=''
usevendorprefix=''
vendorprefix=''
vendorprefixexp=''
d_vendorscript=''
installvendorscript=''
vendorscript=''
vendorscriptexp=''
versiononly=''
yacc=''
yaccflags=''
CONFIG=''

: Detect odd OSs
define='define'
undef='undef'
smallmach='pdp11 i8086 z8000 i80286 iAPX286'
rmlist=''

: We must find out about Eunice early
eunicefix=':'
if test -f /etc/unixtovms; then
	eunicefix=/etc/unixtovms
fi
if test -f /etc/unixtovms.exe; then
	eunicefix=/etc/unixtovms.exe
fi

: Set executable suffix now -- needed before hints available
if test -f "/libs/version.library"; then
: Amiga OS
    _exe=""
elif test -f "/system/gnu_library/bin/ar.pm"; then
: Stratus VOS
    _exe=".pm"
elif test -n "$DJGPP"; then
: DOS DJGPP
    _exe=".exe"
elif test -f /kern/cookiejar; then
: MiNT
    _exe=""
elif test -d c:/. -o -n "$is_os2" ; then
: OS/2 or cygwin
    _exe=".exe"
fi

groupstype=''
i_whoami=''
: Possible local include directories to search.
: Set locincpth to "" in a hint file to defeat local include searches.
locincpth="/usr/local/include /opt/local/include /usr/gnu/include"
locincpth="$locincpth /opt/gnu/include /usr/GNU/include /opt/GNU/include"
:
: no include file wanted by default
inclwanted=''

: Enable -DEBUGGING and -DDEBUGGING from the command line
EBUGGING=''
DEBUGGING=''

: Trailing extension.  Override this in a hint file, if needed.
: Extra object files, if any, needed on this platform.
archobjs=''
libnames=''
: change the next line if compiling for Xenix/286 on Xenix/386
xlibpth='/usr/lib/386 /lib/386'
: Possible local library directories to search.
loclibpth="/usr/local/lib /opt/local/lib /usr/gnu/lib"
loclibpth="$loclibpth /opt/gnu/lib /usr/GNU/lib /opt/GNU/lib"

: general looking path for locating libraries
glibpth="/lib /usr/lib $xlibpth"
glibpth="$glibpth /usr/ccs/lib /usr/ucblib /usr/local/lib"
test -f /usr/shlib/libc.so && glibpth="/usr/shlib $glibpth"
test -f /shlib/libc.so     && glibpth="/shlib $glibpth"
test -d /usr/lib64         && glibpth="$glibpth /lib64 /usr/lib64 /usr/local/lib64"

: Private path used by Configure to find libraries.  Its value
: is prepended to libpth. This variable takes care of special
: machines, like the mips.  Usually, it should be empty.
plibpth=''

: default library list
libswanted=''
: some systems want to use only the non-versioned libso:s
ignore_versioned_solibs=''
ccname=''
ccversion=''
perllibs=''
: set useposix=false in your hint file to disable the POSIX extension.
useposix=true
: set useopcode=false in your hint file to disable the Opcode extension.
useopcode=true
: set uselanginfo=false in your hint file to disable the I18N::Langinfo extension.
uselanginfo=true
archname64=''
ccflags_uselargefiles=''
ldflags_uselargefiles=''
libswanted_uselargefiles=''
: set usemultiplicity on the Configure command line to enable multiplicity.
: set usesocks on the Configure command line to enable socks.
archname=''
: set usethreads on the Configure command line to enable threads.
usereentrant='undef'
: List of libraries we want.
: If anyone needs extra -lxxx, put those in a hint file.
libswanted="cl pthread socket bind inet ndbm gdbm dbm db malloc dl ld"
libswanted="$libswanted sun m crypt sec util c cposix posix ucb bsd BSD"
: We probably want to search /usr/shlib before most other libraries.
: This is only used by the lib/ExtUtils/MakeMaker.pm routine extliblist.
glibpth=`echo " $glibpth " | sed -e 's! /usr/shlib ! !'`
glibpth="/usr/shlib $glibpth"
: Do not use vfork unless overridden by a hint file.
usevfork=false

: Find the basic shell for Bourne shell scripts
case "$sh" in
'')
	case "$SYSTYPE" in
	*bsd*|sys5*) xxx="/$SYSTYPE/bin/sh";;
	*) xxx='/bin/sh';;
	esac
	if test -f "$xxx"; then
		sh="$xxx"
	else
		: Build up a list and do a single loop so we can 'break' out.
		pth=`echo $PATH | sed -e "s/$p_/ /g"`
		for xxx in sh bash ksh pdksh ash; do
			for p in $pth; do
				try="$try ${p}/${xxx}"
			done
		done
		for xxx in $try; do
			if test -f "$xxx"; then
				sh="$xxx";
				break
			elif test "X$_exe" != X -a -f "$xxx$_exe"; then
				sh="$xxx";
				break
			elif test -f "$xxx.exe"; then
				sh="$xxx";
				break
			fi
		done
	fi
	;;
esac

case "$sh" in
'')	cat >&2 <<EOM
$me:  Fatal Error:  I can't find a Bourne Shell anywhere.

Usually it's in /bin/sh.  How did you even get this far?
Please report this issue at https://github.com/Perl/perl5/issues
and we'll try to straighten this all out.
EOM
	exit 1
	;;
esac

: When cross-compiling we need to separate the sh-to-run-Configure-with from the sh-to-use-in-Perl
: default both to the same thing, cross-compilers can then set targetsh differently if they like
targetsh=$sh

: see if sh knows # comments
if `$sh -c '#' >/dev/null 2>&1`; then
	shsharp=true
	spitshell=cat
	xcat=/bin/cat
	test -f $xcat$_exe || xcat=/usr/bin/cat
	if test ! -f $xcat$_exe; then
		for p in `echo $PATH | sed -e "s/$p_/ /g"` $paths; do
			if test -f $p/cat$_exe; then
				xcat=$p/cat
				break
			fi
		done
		if test ! -f $xcat$_exe; then
			echo "Can't find cat anywhere!"
			exit 1
		fi
	fi
	echo "#!$xcat" >sharp
	$eunicefix sharp
	chmod +x sharp
	./sharp > today 2>/dev/null
	if test -s today; then
		sharpbang='#!'
	else
		echo "#! $xcat" > sharp
		$eunicefix sharp
		chmod +x sharp
		./sharp > today 2>/dev/null
		if test -s today; then
			sharpbang='#! '
		else
			sharpbang=': use '
		fi
	fi
else
	echo " "
	echo "Your $sh doesn't grok # comments--I will strip them later on."
	shsharp=false
	cd ..
	echo "exec grep -v '^[ 	]*#'" >spitshell
	chmod +x spitshell
	$eunicefix spitshell
	spitshell=`pwd`/spitshell
	cd UU
	echo "I presume that if # doesn't work, #! won't work either!"
	sharpbang=': use '
fi
rm -f sharp today

: figure out how to guarantee sh startup
case "$startsh" in
'') startsh=${sharpbang}${sh} ;;
*)
esac
cat >sharp <<EOSS
$startsh
set abc
test "$?abc" != 1
EOSS

chmod +x sharp
$eunicefix sharp
if ./sharp; then
	: echo "Yup, it does."
else
	echo "Hmm... '$startsh' does not guarantee sh startup..."
	echo "You may have to fix up the shell scripts to make sure $sh runs them."
fi
rm -f sharp

: Save command line options in file UU/cmdline.opt for later use in
: generating config.sh.
cat > cmdline.opt <<EOSH
: Configure command line arguments.
config_arg0='$0'
config_args='$*'
config_argc=$#
EOSH
argn=1
args_exp=''
args_sep=''
for arg in "$@"; do
	cat >>cmdline.opt <<EOSH
config_arg$argn='$arg'
EOSH
	cat <<EOC | sed -e "s/'/'"'"'"'"'"'"'/g" > cmdl.opt
$arg
EOC
	arg_exp=`cat cmdl.opt`
	args_exp="$args_exp$args_sep'$arg_exp'"
	argn=`expr $argn + 1`
	args_sep=' '
done
rm -f cmdl.opt

: produce awk script to parse command line options
cat >options.awk <<'EOF'
BEGIN {
	optstr = "A:dD:eEf:hKOrsSU:V";	# getopt-style specification

	len = length(optstr);
	for (i = 1; i <= len; i++) {
		c = substr(optstr, i, 1);
		if (i < len) a = substr(optstr, i + 1, 1); else a = "";
		if (a == ":") {
			arg[c] = 1;
			i++;
		}
		opt[c] = 1;
	}
}
{
	expect = 0;
	str = $0;
	if (substr(str, 1, 1) != "-") {
		printf("'%s'\n", str);
		next;
	}
	len = length($0);
	for (i = 2; i <= len; i++) {
		c = substr(str, i, 1);
		if (!opt[c]) {
			printf("-%s\n", substr(str, i));
			next;
		}
		printf("-%s\n", c);
		if (arg[c]) {
			if (i < len)
				printf("'%s'\n", substr(str, i + 1));
			else
				expect = 1;
			next;
		}
	}
}
END {
	if (expect)
		print "?";
}
EOF

: process the command line options
set X `for arg in "$@"; do echo "X$arg"; done |
	sed -e s/X// | awk -f options.awk`
eval "set $*"
shift
rm -f options.awk

: set up default values
fastread=''
reuseval=false
config_sh=''
alldone=''
error=''
silent=''
extractsh=''
knowitall=''
rm -f optdef.sh posthint.sh
cat >optdef.sh <<EOS
$startsh
EOS


: option parsing
while test $# -gt 0; do
	case "$1" in
	-d) shift; fastread=yes;;
	-e) shift; alldone=cont;;
	-f)
		shift
		cd ..
		if test -r "$1"; then
			config_sh="$1"
		else
			echo "$me: cannot read config file $1." >&2
			error=true
		fi
		cd UU
		shift;;
	--help|\
	-h) shift; error=true;;
	-r) shift; reuseval=true;;
	-s) shift; silent=true; realsilent=true;;
	-E) shift; alldone=exit;;
	-K) shift; knowitall=true;;
	-O) shift;;
	-S) shift; silent=true; extractsh=true;;
	-D)
		shift
		case "$1" in
		*=)
			echo "$me: use '-U symbol=', not '-D symbol='." >&2
			echo "$me: ignoring -D $1" >&2
			;;
		*=*) echo "$1" | \
				sed -e "s/'/'\"'\"'/g" -e "s/=\(.*\)/='\1'/" >> optdef.sh;;
		*) echo "$1='define'" >> optdef.sh;;
		esac
		shift
		;;
	-U)
		shift
		case "$1" in
		*=) echo "$1" >> optdef.sh;;
		*=*)
			echo "$me: use '-D symbol=val', not '-U symbol=val'." >&2
			echo "$me: ignoring -U $1" >&2
			;;
		*) echo "$1='undef'" >> optdef.sh;;
		esac
		shift
		;;
	-A)
	    shift
	    xxx=''
	    yyy="$1"
	    zzz=''
	    uuu=undef
	    case "$yyy" in
            *=*) zzz=`echo "$yyy"|sed 's!=.*!!'`
                 case "$zzz" in
                 *:*) zzz='' ;;
                 *)   xxx=append
                      zzz=" "`echo "$yyy"|sed 's!^[^=]*=!!'`
                      yyy=`echo "$yyy"|sed 's!=.*!!'` ;;
                 esac
                 ;;
            esac
            case "$xxx" in
            '')  case "$yyy" in
                 *:*) xxx=`echo "$yyy"|sed 's!:.*!!'`
                      yyy=`echo "$yyy"|sed 's!^[^:]*:!!'`
                      zzz=`echo "$yyy"|sed 's!^[^=]*=!!'`
                      yyy=`echo "$yyy"|sed 's!=.*!!'` ;;
                 *)   xxx=`echo "$yyy"|sed 's!:.*!!'`
                      yyy=`echo "$yyy"|sed 's!^[^:]*:!!'` ;;
                 esac
                 ;;
            esac
	    case "$xxx" in
	    append)
		echo "$yyy=\"\${$yyy}$zzz\""	>> posthint.sh ;;
	    clear)
		echo "$yyy=''"			>> posthint.sh ;;
	    define)
	        case "$zzz" in
		'') zzz=define ;;
		esac
		echo "$yyy='$zzz'"		>> posthint.sh ;;
	    eval)
		echo "eval \"$yyy=$zzz\""	>> posthint.sh ;;
	    prepend)
		echo "$yyy=\"$zzz\${$yyy}\""	>> posthint.sh ;;
	    undef)
	        case "$zzz" in
		'') zzz="$uuu" ;;
		esac
		echo "$yyy=$zzz"		>> posthint.sh ;;
            *)  echo "$me: unknown -A command '$xxx', ignoring -A $1" >&2 ;;
	    esac
	    shift
	    ;;
	-V) echo "$me generated by metaconfig 3.5 PL0." >&2
	    exit 0;;
	--) break;;
	-*) echo "$me: unknown option $1" >&2; shift; error=true;;
	*) break;;
	esac
done

case "$error" in
true)
	cat >&2 <<EOM
Usage: $me [-dehrsEKOSV] [-f config.sh] [-D symbol] [-D symbol=value]
                 [-U symbol] [-U symbol=] [-A command:symbol...]
  -d : use defaults for all answers.
  -e : go on without questioning past the production of config.sh.
  -f : specify an alternate default configuration file.
  -h : print this help message and exit (with an error status).
  -r : reuse C symbols value if possible (skips costly nm extraction).
  -s : silent mode, only echoes questions and essential information.
  -D : define symbol to have some value:
         -D symbol                symbol gets the value 'define'
         -D symbol='some value'   symbol is set to 'some value'
       common used examples (see INSTALL for more info):
         -Duse64bitint            use 64bit integers
         -Duse64bitall            use 64bit integers and pointers
         -Dusethreads             use thread support
         -Dinc_version_list=none  do not include older perl trees in @INC
         -DEBUGGING=none          DEBUGGING options
         -Dcc=gcc                 choose your compiler
         -Dprefix=/opt/perl5      choose your destination
  -E : stop at the end of questions, after having produced config.sh.
  -K : do not use unless you know what you are doing.
  -O : ignored for backward compatibility
  -S : perform variable substitutions on all .SH files (can mix with -f)
  -U : undefine symbol:
         -U symbol    symbol gets the value 'undef'
         -U symbol=   symbol gets completely empty
       e.g.:  -Uversiononly
  -A : manipulate symbol after the platform specific hints have been applied:
         -A append:symbol=value   append value to symbol
         -A symbol=value          like append:, but with a separating space
         -A define:symbol=value   define symbol to have value
         -A clear:symbol          define symbol to be ''
         -A define:symbol         define symbol to be 'define'
         -A eval:symbol=value     define symbol to be eval of value
         -A prepend:symbol=value  prepend value to symbol
         -A undef:symbol          define symbol to be 'undef'
         -A undef:symbol=         define symbol to be ''
       e.g.:  -A prepend:libswanted='cl pthread '
              -A ccflags=-DSOME_MACRO
  -V : print version number and exit (with a zero status).
EOM
	exit 1
	;;
esac

: Sanity checks
case "$fastread$alldone" in
yescont|yesexit) ;;
*)
	case "$extractsh" in
	true) ;;
	*)
		if test ! -t 0; then
			echo "Say 'sh Configure', not 'sh <Configure'"
			exit 1
		fi
		;;
	esac
	;;
esac

exec 4>&1
case "$silent" in
true) exec 1>/dev/null;;
esac

: run the defines and the undefines, if any, but leave the file out there...
touch optdef.sh
grep '\\' optdef.sh >/dev/null 2>&1
if test $? = 0; then
    echo "Configure does not support \\ in -D arguments"
    exit 1
fi
. ./optdef.sh
: create the posthint manipulation script and leave the file out there...
touch posthint.sh

: set package name
package='perl5'
first=`echo $package | sed -e 's/^\(.\).*/\1/'`
last=`echo $package | sed -e 's/^.\(.*\)/\1/'`
case "`echo AbyZ | tr '[:lower:]' '[:upper:]' 2>/dev/null`"-"`echo AbyZ | tr '[:upper:]' '[:lower:]' 2>/dev/null`" in
ABYZ-abyz) spackage=`echo $first | tr '[:lower:]' '[:upper:]'`$last;;
*) spackage=`echo $first | tr '[a-z]' '[A-Z]'`$last;;
esac

: Some greps do not return status, grrr.
echo "grimblepritz" >grimble
if grep blurfldyick grimble >/dev/null 2>&1 ; then
	contains=contains
elif grep grimblepritz grimble >/dev/null 2>&1 ; then
	contains=grep
else
	contains=contains
fi
rm -f grimble
: the following should work in any shell
case "$contains" in
contains*)
	echo " " >&4
	echo "AGH!  Grep doesn't return a status.  Attempting remedial action." >&4
	cat >contains <<'EOSS'
grep "$1" "$2" >.greptmp && cat .greptmp && test -s .greptmp
EOSS
contains=./contains
chmod +x $contains
esac

: Find the path to the source tree
case "$src" in
'') case "$0" in
    */*) src=`echo $0 | sed -e 's%/[^/][^/]*$%%'`
         case "$src" in
	 /*)	;;
	 .)	;;
         *)	src=`cd ../$src && pwd` ;;
	 esac
         ;;
    *)   src='.';;
    esac;;
esac
case "$src" in
'')	src=/
	rsrc=/
	;;
/*)	rsrc="$src";;
*)	rsrc="../$src";;
esac
if test -f $rsrc/Configure && \
	$contains "^package='$package'\$" $rsrc/Configure >/dev/null 2>&1
then
   : found it, so we are ok.
else
	rsrc=''
	for src in . .. ../.. ../../.. ../../../..; do
		if test -f ../$src/Configure && \
			$contains "^package=$package$" ../$src/Configure >/dev/null 2>&1
		then
			rsrc=../$src
			break
		fi
	done
fi
case "$rsrc" in
'')
	cat <<EOM >&4

Sorry, I can't seem to locate the source dir for $package.  Please start
Configure with an explicit path -- i.e. /some/path/Configure.

EOM
	exit 1
	;;
../.)	rsrc='..';;
*)
	echo " "
	echo "Sources for $package found in \"$src\"." >&4
	;;
esac

: script used to extract .SH files with variable substitutions
cat >extract <<'EOS'
PERL_CONFIG_SH=true
echo "Doing variable substitutions on .SH files..."
if test -f MANIFEST; then
	set x `awk '{print $1}' < MANIFEST | grep '\.SH$'`
else
	echo "(Looking for .SH files under the source directory.)"
	set x `(cd "$src"; find . -name "*.SH" -print)`
fi
shift
case $# in
0) set x `(cd "$src"; echo *.SH)`; shift;;
esac
if test ! -f "$src/$1"; then
	shift
fi
mkdir_p='
name=$1;
create="";
while test $name; do
	if test ! -d "$name"; then
		create="$name $create";
		name=`echo $name | sed -e "s|^[^/]*$||"`;
		name=`echo $name | sed -e "s|\(.*\)/.*|\1|"`;
	else
		name="";
	fi;
done;
for file in $create; do
	mkdir $file;
done
'
for file in $*; do
	case "$src" in
	".")
		case "$file" in
		*/*)
			dir=`expr X$file : 'X\(.*\)/'`
			file=`expr X$file : 'X.*/\(.*\)'`
			(cd "$dir" && . ./$file)
			;;
		*)
			. ./$file
			;;
		esac
		;;
	*)
		case "$file" in
		*/*)
			dir=`expr X$file : 'X\(.*\)/'`
			file=`expr X$file : 'X.*/\(.*\)'`
			(set x $dir; shift; eval $mkdir_p)
			sh <"$src/$dir/$file"
			;;
		*)
			sh <"$src/$file"
			;;
		esac
		;;
	esac
done
if test -f "$src/config_h.SH"; then
	if test ! -f config.h; then
	: oops, they left it out of MANIFEST, probably, so do it anyway.
	. "$src/config_h.SH"
	fi
fi
EOS

: extract files and exit if asked to do so
case "$extractsh" in
true)
	case "$realsilent" in
	true) ;;
	*) exec 1>&4;;
	esac
	case "$config_sh" in
	'') config_sh='config.sh';;
	esac
	echo " "
	echo "Fetching answers from $config_sh..."
	cd ..
	. $config_sh
	. UU/optdef.sh
	echo " "
	. UU/extract
	rm -rf UU
	echo "Extraction done."
	exit 0
	;;
esac

: Eunice requires " " instead of "", can you believe it
echo " "
: Here we go...
echo "Beginning of configuration questions for $package."

trap 'echo " "; test -d ../UU && rm -rf X $rmlist; exit 1' 1 2 3 15

: first determine how to suppress newline on echo command
echo " "
echo "Checking echo to see how to suppress newlines..."
(echo "hi there\c" ; echo " ") >.echotmp
if $contains c .echotmp >/dev/null 2>&1 ; then
	echo "...using -n."
	n='-n'
	c=''
else
	cat <<'EOM'
...using \c
EOM
	n=''
	c='\c'
fi
echo $n "The star should be here-->$c"
echo '*'
rm -f .echotmp

: Now test for existence of everything in MANIFEST
echo " "
if test -f "$rsrc/MANIFEST"; then
	echo "First let's make sure your kit is complete.  Checking..." >&4
	awk '$1 !~ /PACK[A-Z]+/ {print $1}' "$rsrc/MANIFEST" | \
		(split -l 50 2>/dev/null || split -50)
	rm -f missing
	tmppwd=`pwd`
	for filelist in x??; do
		(cd "$rsrc"; ls `cat "$tmppwd/$filelist"` \
			>/dev/null 2>>"$tmppwd/missing")
	done
	if test -s missing; then
		cat missing >&4
		cat >&4 <<'EOM'

THIS PACKAGE SEEMS TO BE INCOMPLETE.

You have the option of continuing the configuration process, despite the
distinct possibility that your kit is damaged, by typing 'y'es.  If you
do, don't blame me if something goes wrong.  I advise you to type 'n'o
and contact the author (https://github.com/Perl/perl5/issues).

EOM
		echo $n "Continue? [n] $c" >&4
		read ans
		case "$ans" in
		y*)
			echo "Continuing..." >&4
			rm -f missing
			;;
		*)
			echo "ABORTING..." >&4
			kill $$
			;;
		esac
	else
		echo "Looks good..."
	fi
else
	echo "There is no MANIFEST file.  I hope your kit is complete !"
fi
rm -f missing x??

: Find the appropriate value for a newline for tr
if test -n "$DJGPP"; then
       trnl='\012'
fi
if test X"$trnl" = X; then
	case "`echo foo | tr '\n' x 2>/dev/null`" in
	foox) trnl='\n' ;;
	esac
fi
if test X"$trnl" = X; then
	case "`echo foo | tr '\012' x 2>/dev/null`" in
	foox) trnl='\012' ;;
	esac
fi
if test X"$trnl" = X; then
       case "`echo foo | tr '\r\n' xy 2>/dev/null`" in
       fooxy) trnl='\n\r' ;;
       esac
fi
if test X"$trnl" = X; then
	cat <<EOM >&2

$me: Fatal Error: cannot figure out how to translate newlines with 'tr'.

EOM
	exit 1
fi

: compute the number of columns on the terminal for proper question formatting
case "$COLUMNS" in
'') COLUMNS='80';;
esac

: set up the echo used in my read
myecho="case \"\$xxxm\" in
'') echo $n \"\$rp $c\" >&4;;
*) case \"\$rp\" in
	'') echo $n \"[\$xxxm] $c\";;
	*)
		if test \`echo \"\$rp [\$xxxm]  \" | wc -c\` -ge $COLUMNS; then
			echo \"\$rp\" >&4
			echo $n \"[\$xxxm] $c\" >&4
		else
			echo $n \"\$rp [\$xxxm] $c\" >&4
		fi
		;;
	esac;;
esac"

: now set up to do reads with possible shell escape and default assignment
cat <<EOSC >myread
$startsh
xxxm=\$dflt
$myecho
ans='!'
counter=42
case "\$fastread" in
yes) case "\$dflt" in
	'') ;;
	*) ans='';
		case "\$silent-\$rp" in
		true-) ;;
		*) echo " " >&4;;
		esac;;
	esac;;
*) case "\$silent" in
	true) case "\$rp" in
		'') ans='';;
		esac;;
	esac;;
esac
while expr "X\$ans" : "X!" >/dev/null; do
	read answ
	set x \$xxxm
	shift
	aok=''; eval "ans=\\"\$answ\\"" && aok=y
	case  "\$answ" in
	"!")
		sh 1>&4
		echo " "
		$myecho
		;;
	!*)
		set x \`expr "X\$ans" : "X!\(.*\)\$"\`
		shift
		sh 1>&4 -c "\$*"
		echo " "
		$myecho
		;;
	"\$ans")
		case "\$ans" in
		\\&*)
			set x \`expr "X\$ans" : "X&\(.*\)\$"\`
			shift
			case "\$1" in
			-d)
				fastread=yes
				echo "(OK, I'll run with -d after this question.)" >&4
				;;
			-*)
				echo "*** Sorry, \$1 not supported yet." >&4
				;;
			esac
			$myecho
			ans=!
			;;
		esac;;
	*)
		case "\$aok" in
		y)
			echo "*** Substitution done -- please confirm."
			xxxm="\$ans"
			ans=\`echo $n "\$ans$c" | tr '$trnl' ' '\`
			xxxm="\$ans"
			ans=!
			;;
		*)
			echo "*** Error -- try again."
			ans=!
			;;
		esac
		$myecho
		;;
	esac
	case "\$ans\$xxxm\$nostick" in
	'')
		ans=!
		$myecho
		;;
	esac
	counter=\`echo \$counter | awk '{ print --\$0 }'\`
	if [ \$counter = 0 ]; then
		echo >&4
		echo >&4 Too many attempts asking the same question.  Giving up.
		exit 1
	fi
done
case "\$ans" in
'') ans="\$xxxm";;
esac
EOSC

: create .config dir to save info across Configure sessions
test -d ../.config || mkdir ../.config
cat >../.config/README <<EOF
This directory created by Configure to save information that should
persist across sessions for $package.

You may safely delete it if you wish.
EOF

: See if we are using a devel version and want that
xversion=`awk '/define[ 	]+PERL_VERSION/ {print $3}' $rsrc/patchlevel.h`
case "$usedevel" in
$define|true|[yY]*)
    usedevel="$define" ;;
*) case "$xversion" in
   *[13579])
	cat >&4 <<EOH
*** WHOA THERE!!! ***

    This is an UNSTABLE DEVELOPMENT release.
    The version of this $package distribution is $xversion, that is, odd,
    (as opposed to even) and that signifies a development release.
    If you want a maintenance release, you want an even-numbered version.

    Do ***NOT*** install this into production use.
    Data corruption and crashes are possible.

    It is most seriously suggested that you do not continue any further
    unless you want to help in developing and debugging Perl.

    If you *still* want to build perl, you can answer 'y' now,
    or pass -Dusedevel to Configure.

EOH
	rp='Do you really want to continue?'
	dflt='n'
	. ./myread
	case "$ans" in
	[yY]) echo >&4 "Okay, continuing."
	      usedevel="$define" ;;
	*) echo >&4 "Okay, bye."
	   exit 1
	   ;;
	esac
	;;
    esac
    usedevel="$undef"
    ;;
esac
case "$usedevel" in
$define|true|[yY]*)
	case "$versiononly" in
	'') versiononly="$define" ;;
	esac
	case "$installusrbinperl" in
	'') installusrbinperl="$undef" ;;
	esac
	;;
esac

: general instructions
needman=true
firsttime=true
user=`(logname) 2>/dev/null`
case "$user" in
'') user=`whoami 2>&1`;;
esac
if $contains "^$user\$" ../.config/instruct >/dev/null 2>&1; then
	firsttime=false
	echo " "
	rp='Would you like to see the instructions?'
	dflt=n
	. ./myread
	case "$ans" in
	[yY]*) ;;
	*) needman=false;;
	esac
fi
if $needman; then
	cat <<EOH

This installation shell script will examine your system and ask you questions
to determine how the perl5 package should be installed. If you get
stuck on a question, you may use a ! shell escape to start a subshell or
execute a command.  Many of the questions will have default answers in square
brackets; typing carriage return will give you the default.

On some of the questions which ask for file or directory names you are allowed
to use the ~name construct to specify the login directory belonging to "name",
even if you don't have a shell which knows about that.  Questions where this is
allowed will be marked "(~name ok)".

EOH
	rp=''
	dflt='Type carriage return to continue'
	. ./myread
	cat <<'EOH'

The prompter used in this script allows you to use shell variables and
backticks in your answers.  You may use $1, $2, etc...  to refer to the words
in the default answer, as if the default line was a set of arguments given to a
script shell.  This means you may also use $* to repeat the whole default line,
so you do not have to re-type everything to add something to the default.

Every time there is a substitution, you will have to confirm.  If there is an
error (e.g. an unmatched backtick), the default answer will remain unchanged
and you will be prompted again.

If you are in a hurry, you may run 'Configure -d'.  This will bypass nearly all
the questions and use the computed defaults (or the previous answers if there
was already a config.sh file). Type 'Configure -h' for a list of options.
You may also start interactively and then answer '& -d' at any prompt to turn
on the non-interactive behaviour for the remainder of the execution.

EOH
	. ./myread
	cat <<EOH

Much effort has been expended to ensure that this shell script will run on any
Unix system.  If despite that it blows up on yours, your best bet is to edit
Configure and run it again.  If you can't run Configure for some reason,
you'll have to generate a config.sh file by hand.  Whatever problems you
have, let me (https://github.com/Perl/perl5/issues) know how I blew it.

This installation script affects things in two ways:

1) it may do direct variable substitutions on some of the files included
   in this kit.
2) it builds a config.h file for inclusion in C programs.  You may edit
   any of these files as the need arises after running this script.

If you make a mistake on a question, there is no easy way to back up to it
currently.  The easiest thing to do is to edit config.sh and rerun all the SH
files.  Configure will offer to let you do this before it runs the SH files.

EOH
	dflt='Type carriage return to continue'
	. ./myread
	case "$firsttime" in
	true) echo $user >>../.config/instruct;;
	esac
fi

: Set 'sysroot' to change the logical root directory to your headers and libraries see man gcc
: This is primarily meant for cross-compile environments, and may fail to be useful in other cases
if test "X$sysroot" = X; then
    sysroot=""
else
    case "$cc" in
	*gcc*|*g++*)
	    echo "Using $sysroot to find your headers and libraries, adding to ccflags"
	    # _sysroot is used in places where we need --sysroot=foo
	    # but using the rest of the flags could cause issues.
	    _sysroot="--sysroot=$sysroot";
	    case "$ccflags" in
		*sysroot*) ;;
		'undef'|*)
		ccflags="$ccflags $_sysroot"
	    esac
	    case "$ldflags" in
		*sysroot*) ;;
		'undef'|*)
		ldflags="$ldflags $_sysroot"
	    esac
	    case "$cppflags" in
		*sysroot*) ;;
		'undef'|*)
		cppflags="$cppflags $_sysroot"
	    esac
	    # lddlflags updated below in lddlflags section;
	    # same with cccdlflags
	    ;;
    esac

    # Adjust some defaults to also use $sysroot
    for var in xlibpth loclibpth locincpth glibpth; do
	eval xxx=\$$var
	eval $var=''
	for path in $xxx; do
	    eval $var=\"\$$var $sysroot$path\"
	done
    done

fi

: find out where common programs are
echo " "
echo "Locating common programs..." >&4
cat <<EOSC >loc
$startsh
case \$# in
0) exit 1;;
esac
thing=\$1
shift
dflt=\$1
shift
for dir in \$*; do
	case "\$thing" in
	.)
	if test -d \$dir/\$thing; then
		echo \$dir
		exit 0
	fi
	;;
	*)
	for thisthing in \$dir/\$thing; do
		: just loop through to pick last item
	done
	if test -f \$thisthing; then
		echo \$thisthing
		exit 0
	elif test "X$_exe" != X -a -f \$thisthing$_exe; then
		echo \$thisthing
		exit 0
	elif test -f \$dir/\$thing.exe; then
		if test -n "$DJGPP"; then
			echo \$dir/\$thing.exe
		elif test "$eunicefix" != ":"; then
			: on Eunice apparently
			echo \$dir/\$thing
		fi
		exit 0
	fi
	;;
	esac
done
echo \$dflt
exit 1
EOSC
chmod +x loc
$eunicefix loc
loclist="
awk
cat
chmod
comm
cp
echo
expr
grep
ls
mkdir
rm
sed
sort
touch
tr
uniq
"
trylist="
ar
bison
byacc
cpp
csh
date
egrep
gmake
gzip
less
ln
make
more
nm
nroff
perl
pg
test
uname
zip
"
pth=`echo $PATH | sed -e "s/$p_/ /g"`
pth="$pth $sysroot/lib $sysroot/usr/lib"
for file in $loclist; do
	eval xxx=\$$file
	case "$xxx" in
	/*|?:[\\/]*)
		if test -f "$xxx"; then
			: ok
		else
			echo "WARNING: no $xxx -- ignoring your setting for $file." >&4
			xxx=`./loc $file $file $pth`
		fi
		;;
	'') xxx=`./loc $file $file $pth`;;
	*) xxx=`./loc $xxx $xxx $pth`;;
	esac
	eval $file=$xxx$_exe
	eval _$file=$xxx
	case "$xxx" in
	/*)
		echo $file is in $xxx.
		;;
	?:[\\/]*)
		echo $file is in $xxx.
		;;
	*)
		echo "I don't know where '$file' is, and my life depends on it." >&4
		echo "Go find a public domain implementation or fix your PATH setting!" >&4

		test -f /etc/debian_version && echo "Run \"apt install build-essential\" to install make and friends" >&4
		test -f /etc/SUSE-brand     && echo "Run \"zypper install 'pattern:devel_C_C++'\" to install make and friends" >&4
		test -f /etc/redhat-release && echo "Run \"yum groupinstall 'Development Tools'\" to install make and friends" >&4
		test -f /etc/fedora-release && echo "Run \"dnf group install 'Development Tools'\" to install make and friends" >&4
		exit 1
		;;
	esac
done
echo " "
echo "Don't worry if any of the following aren't found..."
say=offhand
for file in $trylist; do
	eval xxx=\$$file
	case "$xxx" in
	/*|?:[\\/]*)
		if test -f "$xxx"; then
			: ok
		else
			echo "WARNING: no $xxx -- ignoring your setting for $file." >&4
			xxx=`./loc $file $file $pth`
		fi
		;;
	'') xxx=`./loc $file $file $pth`;;
	*) xxx=`./loc $xxx $xxx $pth`;;
	esac
	eval $file=$xxx$_exe
	eval _$file=$xxx
	case "$xxx" in
	/*)
		echo $file is in $xxx.
		;;
	?:[\\/]*)
		echo $file is in $xxx.
		;;
	*)
		echo "I don't see $file out there, $say."
		say=either
		;;
	esac
done
case "$egrep" in
egrep)
	echo "Substituting grep for egrep."
	egrep=$grep
	_egrep=$grep
	;;
esac
case "$less" in
'')	;;
*)	if $less -R </dev/null >/dev/null 2>&1; then
	       echo "Substituting less -R for less."
	       less="$less -R"
	       _less=$less
	fi
	;;
esac
case "$ln" in
ln)
	echo "Substituting cp for ln."
	ln=$cp
	_ln=$cp
	;;
esac
case "$make" in
make)
	case "$gmake" in
	gmake)
	echo "I can't find make or gmake, and my life depends on it." >&4
	echo "Go find a public domain implementation or fix your PATH setting!" >&4
	exit 1
	;;
	esac
	;;
esac
case "$gmake" in
gmake)	;;
*)	# We can't have osname yet.
	if test -f "/system/gnu_library/bin/ar.pm"; then # Stratus VOS
		# Assume that gmake, if found, is definitely GNU make
		# and prefer it over the system make.
		echo "Substituting gmake for make."
		make=$gmake
		_make=$gmake
	fi
	;;
esac
case "$test" in
test)
	echo "Hopefully test is built into your sh."
	;;
*)
	if `sh -c "PATH= test true" >/dev/null 2>&1`; then
		echo "Using the test built into your sh."
		test=test
		_test=test
	fi
	;;
esac
case "$echo" in
echo)
	echo "Hopefully echo is built into your sh."
	;;
'') ;;
*)
	echo " "
echo "Checking compatibility between $echo and builtin echo (if any)..." >&4
	$echo $n "hi there$c" >foo1
	echo $n "hi there$c" >foo2
	if cmp foo1 foo2 >/dev/null 2>&1; then
		echo "They are compatible.  In fact, they may be identical."
	else
		case "$n" in
		'-n') n='' c='\c';;
		*) n='-n' c='';;
		esac
		cat <<FOO
They are not compatible!  You are probably running ksh on a non-USG system.
I'll have to use $echo instead of the builtin, since Bourne shell doesn't
have echo built in and we may have to run some Bourne shell scripts.  That
means I'll have to use '$n$c' to suppress newlines now.  Life is ridiculous.

FOO
		$echo $n "The star should be here-->$c"
		$echo "*"
	fi
	$rm -f foo1 foo2
	;;
esac

# This question was auctioned at YAPC::Europe-2007 in Vienna
# I never promised you could answer it. I only auctioned the question.
cat <<FOO
The following message is sponsored by

  Dresden.pm<--The stars should be here.

Dear Perl user, system administrator or package
maintainer, the Perl community sends greetings to
you. Do you (emblematical) greet back [Y/n]? n

FOO

: Check what type of C compiler we use
cat <<EOS >trygcc
$startsh
EOS
cat <<'EOSC' >>trygcc
case "$cc" in
'') ;;
*)  $rm -f try try.*
    $cat >try.c <<EOM
int main(int argc, char *argv[]) {
  return 0;
}
EOM
    if $cc -o try $ccflags $ldflags try.c; then
       :
    else
        echo "Uh-oh, the C compiler '$cc' doesn't seem to be working." >&4
        despair=yes
        trygcc=yes
        case "$cc" in
        *gcc*) trygcc=no ;;
        esac
	# Skip this test because it gives a false match on output like:
	#    ./trygcc: line 23: cc: command not found
        # case "`$cc -v -c try.c 2>&1`" in
        # *gcc*) trygcc=no ;;
        # esac
        if $test X"$trygcc" = Xyes; then
            if gcc -o try -c try.c; then
                echo " "
                echo "You seem to have a working gcc, though." >&4
		# Switching compilers may undo the work of hints files.
		# The most common problem is -D_REENTRANT for threads.
		# This heuristic catches that case, but gets false positives
		# if -Dusethreads was not actually specified.  Better to
		# bail out here with a useful message than fail
		# mysteriously later. Should we perhaps just try to
		# re-invoke Configure -Dcc=gcc config_args ?
		if $test -f usethreads.cbu; then
			$cat >&4 <<EOM

*** However, any setting of the C compiler flags (e.g. for thread support)
*** will be lost.  It may be necessary for you to restart Configure and
*** add -Dcc=gcc to your Configure command line.

EOM
			rp="Would you like to go ahead and try gcc anyway?"
			dflt=n
		else
			rp="Would you like to use it?"
			dflt=y
		fi
                if $test -f myread; then
                    . ./myread
                else
                    if $test -f UU/myread; then
                        . ./UU/myread
                    else
                        echo "Cannot find myread, sorry.  Aborting." >&4
                        exit 1
                    fi
                fi
                case "$ans" in
                [yY]*) cc=gcc; ccname=gcc; ccflags=''; despair=no;
                esac
            fi
        fi
    fi
    $rm -f try try.*
    ;;
esac
EOSC

cat <<EOS >checkcc
$startsh
EOS
cat <<'EOSC' >>checkcc
case "$cc" in
'') ;;
*)  $rm -f try try.*
    $cat >try.c <<EOM
int main(int argc, char *argv[]) {
  return 0;
}
EOM
    if $cc -o try $ccflags $ldflags try.c; then
       :
    else
        if $test X"$despair" = Xyes; then
           echo "Uh-oh, the C compiler '$cc' doesn't seem to be working." >&4
        fi
        $cat >&4 <<EOM
You need to find a working C compiler.
Either (purchase and) install the C compiler supplied by your OS vendor,
or for a free C compiler try http://gcc.gnu.org/
I cannot continue any further, aborting.
EOM
        exit 1
    fi
    $rm -f try try.*
    ;;
esac
EOSC

: determine whether symbolic links are supported
echo " "
$touch blurfl
if $ln -s blurfl sym > /dev/null 2>&1 ; then
	echo "Symbolic links are supported." >&4
	lns="$ln -s"
else
	echo "Symbolic links are NOT supported." >&4
	lns="$ln"
fi
$rm -f blurfl sym

: determine whether symbolic links are supported
echo " "
case "$lns" in
*"ln"*" -s")
	echo "Checking how to test for symbolic links..." >&4
	$lns blurfl sym
	if $test "X$issymlink" = X; then
		case "$newsh" in
		'') sh     -c "PATH= test -h sym" >/dev/null 2>&1 ;;
		*)  $newsh -c "PATH= test -h sym" >/dev/null 2>&1 ;;
		esac
		if test $? = 0; then
			issymlink="test -h"
		else
			echo "Your builtin 'test -h' may be broken." >&4
			case "$test" in
			/*)	;;
			*)	pth=`echo $PATH | sed -e "s/$p_/ /g"`
				for p in $pth
				do
					if test -f "$p/$test"; then
						test="$p/$test"
						break
					fi
				done
				;;
			esac
			case "$test" in
			/*)
				echo "Trying external '$test -h'." >&4
				issymlink="$test -h"
				if $test ! -h sym >/dev/null 2>&1; then
					echo "External '$test -h' is broken, too." >&4
					issymlink=''
				fi
				;;
			*)	issymlink='' ;;
			esac
		fi
	fi
	if $test "X$issymlink" = X; then
		if $test -L sym 2>/dev/null; then
			issymlink="$test -L"
			echo "The builtin '$test -L' worked." >&4
		fi
	fi
	if $test "X$issymlink" != X; then
		echo "You can test for symbolic links with '$issymlink'." >&4
	else
		echo "I do not know how you can test for symbolic links." >&4
	fi
	$rm -f blurfl sym
	;;
*)	echo "No symbolic links, so not testing for their testing..." >&4
	;;
esac

: Make symlinks util
case "$mksymlinks" in
$define|true|[yY]*)
	case "$src" in
	''|'.')	echo "Cannot create symlinks in the original directory." >&4
		exit 1
		;;
	*)	case "$lns:$issymlink" in
		*"ln"*" -s:"*"test -"?)
			echo "Creating the symbolic links..." >&4
			cd ..
			awk '{print $1}' $src/MANIFEST | sed -e 's:/\([^/]*\)$: \1:' |
			awk 'NF == 1 {
				dir=".";
				file=$1 "";
			     }
			     NF == 2 {
				dir=$1 "";
				file=$2 "";
			     }
			     {
				 print "# dir = ", dir, "file = ", file
				 mf[dir] = mf[dir]" "source"/"dir"/"file;
			     } END {
				 for (d in mf) {
				     if (d != ".") { print("mkdir -p "d) }
				     print("ln -sf "mf[d]" "d);
				 }
			     }' source="$src" > UU/mksymlinks.$$
			sh UU/mksymlinks.$$
			rm UU/mksymlinks.$$
			# Sanity check 1.
			if test ! -d t/base; then
				echo "Failed to create the subdirectories.  Aborting." >&4
				exit 1
			fi
			# Sanity check 2.
			if test ! -f t/base/lex.t; then
				echo "Failed to create the symlinks (t/base/lex.t missing).  Aborting." >&4
				exit 1
			fi
			if test ! -f win32/win32.c; then
				echo "Failed to create the symlinks (win32/win32.c missing).  Aborting." >&4
				exit 1
			fi
			cd UU
			;;
		*)	echo "(I cannot figure out how to do symbolic links, ignoring mksymlinks)." >&4
			;;
		esac
		;;
	esac
	;;
esac

: Check for Cross-Compilation
if $test "X$targethost" = "X"; then
    targethost=""
fi
if $test "X$targetenv" = "X"; then
    targetenv=""
fi
case "$usecrosscompile" in
$define|true|[yY]*)
	$echo "Cross-compiling..."
	croak=''
	case "$cc" in
	*-gcc*|*-g++*) # A cross-compiling gcc, probably.
	    # arm-linux-androideabi-gcc  -> arm-linux-androideabi
	    # x86_64-w64-mingw32-gcc.exe -> x86_64-w64-mingw32
	    targetarch=`$echo $cc|$sed 's/-g[c\+][c\+].*$//'`
	    ar=`$echo $cc|$sed 's/-g[c\+][c\+]/-ar/'`
	    # leave out ld, choosing it is more complex
	    nm=`$echo $cc|$sed 's/-g[c\+][c\+]/-nm/'`
	    ranlib=`$echo $cc|$sed 's/-g[c\+][c\+]/-ranlib/'`
	    # We are in a weird spot. Just before us, some values
	    # were 'saved', to be restored after the hints are
	    # run.  This means that the changes we made to ar,
	    # nm and ranlib will get reverted.
	    # To avoid that, we hijack the saving mechanism and
	    # have it save our new values.
	    for file in ar nm ranlib; do
		eval xxx=\$$file
		eval $file=$xxx$_exe
		eval _$file=$xxx
	    done
	;;
	esac
	case "$targetarch" in
	'') echo "Targetarch not defined." >&4; croak=y ;;
	*)  echo "Using targetarch $targetarch." >&4 ;;
	esac
	case "$targethost" in
	'') echo "Targethost not defined." >&4; croak=n ;;
	*)  echo "Using targethost $targethost." >&4
	esac
	locincpth=' '
	loclibpth=' '
	case "$croak" in
	y) echo "Cannot continue, aborting." >&4; exit 1 ;;
	esac
    : compile a host miniperl and generate_uudmap, unless we got passed them
    if $test "X$hostperl" = X; then
      echo "Building host miniperl and generate_uudmap binaries" >&4
      before_host=`pwd`
      cd ..
      cd $src
      src=`pwd`
      rm -rf $src/host
      mkdir $src/host
      cd $src/host
      $src/Configure -des -Dusedevel -Dmksymlinks
      $make miniperl
      case "$hostgenerate" in
      '') $make generate_uudmap
          hostgenerate=$src/host/generate_uudmap
          ;;
       "$undef") hostgenerate=''
          ;;
      esac
      hostperl=$src/host/miniperl
      cd $before_host
    fi
    hostosname=`$hostperl -le 'print $^O'`
    ;;
*)
    usecrosscompile="$undef"
    ;;
esac

: Define -Dtargethost=somecomputer to run compiled tests on another machine
case "$targethost" in
    '') echo "Checking for cross-compile" >&4
    case "$usecrosscompile$multiarch" in
       *$define*) echo "Skipping the try tests in the rest of Configure as no targethost was defined when cross-compiling" >&4
         if [ -f Makefile ]; then
           echo " "
           echo "Now you must ensure config.sh, config.h and the generated headers exist and run a $make."
         else
           echo "Configure done."
         fi
       exit 0
       ;;
     *) echo "No targethost for running compiler tests against defined, running locally" >&4
        run=''
        to=:
        from=:
        ;;
    esac
    ;;
    *) echo "Using targethost $targethost." >&4
	case "$src" in
	/*) run=$src/Cross/run
	    targetmkdir=$src/Cross/mkdir
	    to=$src/Cross/to
	    from=$src/Cross/from
	    ;;
	*)  pwd=`$test -f ../Configure & cd ..; pwd`
	    run=$pwd/Cross/run
	    targetmkdir=$pwd/Cross/mkdir
	    to=$pwd/Cross/to
	    from=$pwd/Cross/from
	    ;;
	esac
	case "$targetrun" in
	'') targetrun=ssh ;;
	esac
	case "$targetto" in
	'') targetto=scp ;;
	esac
	case "$targetfrom" in
	'') targetfrom=scp ;;
	esac
	run=$run-$targetrun
	to=$to-$targetto
	from=$from-$targetfrom
	case "$targetdir" in
	'')  targetdir=/tmp
	     echo "Guessing targetdir $targetdir." >&4
	     ;;
	esac
	case "$targetuser" in
	'')  targetuser=root
	     echo "Guessing targetuser $targetuser." >&4
	     ;;
	esac
	case "$targetport" in
	'')  targetport=22
	     echo "Guessing targetport $targetport." >&4
	     ;;
	esac
	case "$targetfrom" in
	scp)	q=-q ;;
	*)	q='' ;;
	esac
	case "$targetrun" in
	ssh|rsh)
	    cat >$run <<EOF
#!/bin/sh
env=''
case "\$1" in
-cwd)
  shift
  cwd=\$1
  shift
  ;;
esac
case "\$1" in
-env)
  shift
  env=\$1
  shift
  ;;
esac
case "\$cwd" in
'') cwd=$targetdir ;;
esac
exe=\$1
shift
$to \$exe
$targetrun -p $targetport -l $targetuser $targethost "cd \$cwd && \$env \$exe \$@"
EOF
	    ;;
	adb)
	    $touch $run
	    ;;
	*)  echo "Unknown targetrun '$targetrun'" >&4
	    exit 1
	    ;;
	esac
	case "$targetmkdir" in
	*/Cross/mkdir)
	    cat >$targetmkdir <<EOF
#!/bin/sh
$targetrun -p $targetport -l $targetuser $targethost "mkdir -p \$@"
EOF
	    $chmod a+rx $targetmkdir
	    ;;
	*)  echo "Unknown targetmkdir '$targetmkdir'" >&4
	    exit 1
	    ;;
	esac
	case "$targetto" in
	scp|rcp)
	    cat >$to <<EOF
#!/bin/sh
for f in \$@
do
  case "\$f" in
  /*)
    $targetmkdir \`dirname \$f\`
    $targetto -P $targetport -r $q \$f $targetuser@$targethost:\$f           2>/dev/null  || exit 1
    ;;
  *)
    $targetmkdir $targetdir/\`dirname \$f\`
    $targetto -P $targetport -r $q \$f $targetuser@$targethost:$targetdir/\$f 2>/dev/null || exit 1
    ;;
  esac
done
exit 0
EOF
	    ;;
	cp) cat >$to <<EOF
#!/bin/sh
for f in \$@
do
  case "\$f" in
  /*)
    $mkdir -p $targetdir/\`dirname \$f\`
    $cp \$f $targetdir/\$f || exit 1
    ;;
  *)
    $targetmkdir $targetdir/\`dirname \$f\`
    $cp \$f $targetdir/\$f || exit 1
    ;;
  esac
done
exit 0
EOF
	    ;;
	*)  echo "Unknown targetto '$targetto'" >&4
	    exit 1
	    ;;
	esac
	case "$targetfrom" in
	scp|rcp)
	  cat >$from <<EOF
#!/bin/sh
for f in \$@
do
  $rm -f \$f
  $targetfrom -P $targetport $q $targetuser@$targethost:$targetdir/\$f . || exit 1
done
exit 0
EOF
	    ;;
	cp) cat >$from <<EOF
#!/bin/sh
for f in \$@
do
  $rm -f \$f
  cp $targetdir/\$f . || exit 1
done
exit 0
EOF
	    ;;
	*)  echo "Unknown targetfrom '$targetfrom'" >&4
	    exit 1
	    ;;
	esac
	if $test ! -f $run; then
	    echo "Target 'run' script '$run' not found." >&4
	else
	    $chmod a+rx $run
	fi
	if $test ! -f $to; then
	    echo "Target 'to' script '$to' not found." >&4
	else
	    $chmod a+rx $to
	fi
	if $test ! -f $from; then
	    echo "Target 'from' script '$from' not found." >&4
	else
	    $chmod a+rx $from
	fi
	if $test ! -f $run -o ! -f $to -o ! -f $from; then
	    exit 1
	fi
	cat >&4 <<EOF
Using '$run' for remote execution,
and '$from' and '$to'
for remote file transfer.
EOF
	;;
*)	run=''
	to=:
	from=:
	usecrosscompile="$undef"
	targetarch=''
	;;
esac

: see whether [:lower:] and [:upper:] are supported character classes
echo " "
case "`echo AbyZ | $tr '[:lower:]' '[:upper:]' 2>/dev/null`"-"`echo AbyZ | $tr '[:upper:]' '[:lower:]' 2>/dev/null`" in
ABYZ-abyz)
	echo "Good, your tr supports [:lower:] and [:upper:] to convert case." >&4
	up='[:upper:]'
	low='[:lower:]'
	;;
*)	# There is a discontinuity in EBCDIC between 'R' and 'S'
	# (0xd9 and 0xe2), therefore that is a nice testing point.
	if test "X$up" = X -o "X$low" = X; then
	    case "`echo RS | $tr '[R-S]' '[r-s]' 2>/dev/null`" in
	    rs) up='[A-Z]'
		low='[a-z]'
		;;
	    esac
	fi
	if test "X$up" = X -o "X$low" = X; then
	    case "`echo RS | $tr R-S r-s 2>/dev/null`" in
	    rs) up='A-Z'
		low='a-z'
		;;
	    esac
	fi
	if test "X$up" = X -o "X$low" = X; then
	    case "`echo RS | od -x 2>/dev/null`" in
	    *D9E2*|*d9e2*)
		echo "Hey, this might be EBCDIC." >&4
		if test "X$up" = X -o "X$low" = X; then
		    case "`echo RS | $tr '[A-IJ-RS-Z]' '[a-ij-rs-z]' 2>/dev/null`" in
		    rs) up='[A-IJ-RS-Z]'
			low='[a-ij-rs-z]'
			;;
		    esac
		fi
		if test "X$up" = X -o "X$low" = X; then
		    case "`echo RS | $tr A-IJ-RS-Z a-ij-rs-z 2>/dev/null`" in
		    rs) up='A-IJ-RS-Z'
			low='a-ij-rs-z'
			;;
		    esac
		fi
		;;
	    esac
	fi
esac
case "`echo RS | $tr \"$up\" \"$low\" 2>/dev/null`" in
rs)
    echo "Using $up and $low to convert case." >&4
    ;;
*)
    echo "I don't know how to translate letters from upper to lower case." >&4
    echo "Your tr is not acting any way I know of." >&4
    exit 1
    ;;
esac
: set up the translation script tr, must be called with ./tr of course
cat >tr <<EOSC
$startsh
case "\$1\$2" in
'[A-Z][a-z]') exec $tr '$up' '$low';;
'[a-z][A-Z]') exec $tr '$low' '$up';;
esac
exec $tr "\$@"
EOSC
chmod +x tr
$eunicefix tr

: Try to determine whether config.sh was made on this system
case "$config_sh" in
'')
myuname=`$uname -a 2>/dev/null`
$test -z "$myuname" && myuname=`hostname 2>/dev/null`
# Downcase everything to avoid ambiguity.
# Remove slashes and single quotes so we can use parts of this in
# directory and file names.
# Remove newlines so myuname is sane to use elsewhere.
# tr '[A-Z]' '[a-z]' would not work in EBCDIC
# because the A-Z/a-z are not consecutive.
myuname=`echo $myuname | $sed -e "s,['/],,g" | \
	./tr '[A-Z]' '[a-z]' | $tr $trnl ' '`
newmyuname="$myuname"
dflt=n
case "$knowitall" in
'')
	if test -f ../config.sh; then
		if $contains myuname= ../config.sh >/dev/null 2>&1; then
			eval "`grep myuname= ../config.sh`"
		fi
		if test "X$myuname" = "X$newmyuname"; then
			dflt=y
		fi
	fi
	;;
*) dflt=y;;
esac

: Get old answers from old config file if Configure was run on the
: same system, otherwise use the hints.
hint=default
cd ..
if test -f config.sh; then
	echo " "
	rp="I see a config.sh file.  Shall I use it to set the defaults?"
	. UU/myread
	case "$ans" in
	n*|N*) echo "OK, I'll ignore it."
		mv config.sh config.sh.old
		myuname="$newmyuname"
		;;
	*)  echo "Fetching default answers from your old config.sh file..." >&4
		tmp_n="$n"
		tmp_c="$c"
		tmp_sh="$sh"
		. ./config.sh
		cp config.sh UU
		n="$tmp_n"
		c="$tmp_c"
		: Older versions did not always set $sh.  Catch re-use of such
		: an old config.sh.
		case "$sh" in
		'') sh="$tmp_sh" ;;
		esac
		hint=previous
		;;
	esac
fi
. ./UU/checkcc
if test ! -f config.sh; then
	$cat <<EOM

First time through, eh?  I have some defaults handy for some systems
that need some extra help getting the Configure answers right:

EOM
	(cd $src/hints; ls -C *.sh) | $sed 's/\.sh/   /g' >&4
	dflt=''
	: Half the following guesses are probably wrong... If you have better
	: tests or hints, please send them to https://github.com/Perl/perl5/issues
	: The metaconfig authors would also appreciate a copy...
	$test -f /irix && osname=irix
	$test -f /xenix && osname=sco_xenix
	$test -f /dynix && osname=dynix
	$test -f /dnix && osname=dnix
	$test -f /lynx.os && osname=lynxos
	$test -f /unicos && osname=unicos && osvers=`$uname -r`
	$test -f /unicosmk && osname=unicosmk && osvers=`$uname -r`
	$test -f /unicosmk.ar && osname=unicosmk && osvers=`$uname -r`
	$test -f /bin/mips && /bin/mips && osname=mips
	$test -d /usr/apollo/bin && osname=apollo
	$test -f /etc/saf/_sactab && osname=svr4
	$test -d /usr/include/minix && osname=minix && osvers=`$uname -r`
	$test -f /system/gnu_library/bin/ar.pm && osname=vos
	$test -f /sys/utilities/MultiView && osname=amigaos
	if $test -d /MachTen -o -d /MachTen_Folder; then
		osname=machten
		if $test -x /sbin/version; then
			osvers=`/sbin/version | $awk '{print $2}' |
			$sed -e 's/[A-Za-z]$//'`
		elif $test -x /usr/etc/version; then
			osvers=`/usr/etc/version | $awk '{print $2}' |
			$sed -e 's/[A-Za-z]$//'`
		else
			osvers="$2.$3"
		fi
	fi

	$test -f /sys/posix.dll &&
		$test -f /usr/bin/what &&
		set X `/usr/bin/what /sys/posix.dll` &&
		$test "$3" = UWIN &&
		osname=uwin &&
		osvers="$5"

	if $test -f $uname; then
		set X $myuname
		shift

		case "$5" in
		fps*) osname=fps ;;
		mips*)
			case "$4" in
			umips) osname=umips ;;
			*) osname=mips ;;
			esac;;
		[23]100) osname=mips ;;
		i386*)
			tmp=`/bin/uname -X 2>/dev/null|awk '/3\.2v[45]/{ print $(NF) }'`
			if $test "$tmp" != "" -a "$3" = "3.2" -a -f '/etc/systemid'; then
				osname='sco'
				osvers=$tmp
			elif $test -f /etc/kconfig; then
				osname=isc
				if test "$lns" = "$ln -s"; then
					osvers=4
				elif $contains _SYSV3 /usr/include/stdio.h > /dev/null 2>&1 ; then
					osvers=3
				elif $contains _POSIX_SOURCE /usr/include/stdio.h > /dev/null 2>&1 ; then
					osvers=2
				fi
			fi
			tmp=''
			;;
		pc*)
			if test -n "$DJGPP"; then
				osname=dos
				osvers=djgpp
			fi
			;;
		esac

		case "$1" in
		aix) osname=aix
			tmp=`( (oslevel) 2>/dev/null || echo "not found") 2>&1`
			case "$tmp" in
			# oslevel can fail with:
			# oslevel: Unable to acquire lock.
			*not\ found) osvers="$4"."$3" ;;
			'<3240'|'<>3240') osvers=3.2.0 ;;
			'=3240'|'>3240'|'<3250'|'<>3250') osvers=3.2.4 ;;
			'=3250'|'>3250') osvers=3.2.5 ;;
			*) osvers=$tmp;;
			esac
			;;
		bitrig) osname=bitrig
			osvers="$3"
			;;
		bsd386) osname=bsd386
			osvers=`$uname -r`
			;;
		cygwin*) osname=cygwin
			osvers="$3"
			;;
		*dc.osx) osname=dcosx
			osvers="$3"
			;;
		dnix) osname=dnix
			osvers="$3"
			;;
		domainos) osname=apollo
			osvers="$3"
			;;
		dgux)	osname=dgux
			osvers="$3"
			;;
		dragonfly) osname=dragonfly
			case "$3" in
			    [0-9]*) osvers="$3" ;;
			    *) osvers="$2" ;;
			esac
			;;
		dynixptx*) osname=dynixptx
			osvers=`echo "$4"|sed 's/^v//'`
			;;
		freebsd) osname=freebsd
			osvers="$3" ;;
		genix)	osname=genix ;;
		gnu)	osname=gnu
			osvers="$3" ;;
		hp*)	osname=hpux
			osvers=`echo "$3" | $sed 's,.*\.\([0-9]*\.[0-9]*\),\1,'`
			;;
		irix*)	osname=irix
			case "$3" in
			4*) osvers=4 ;;
			5*) osvers=5 ;;
			*)	osvers="$3" ;;
			esac
			;;
		linux)	osname=linux
			case "$3" in
			*)	osvers="$3" ;;
			esac
			$test -f /system/lib/libandroid.so && osname=linux-android
			;;
		MiNT)	osname=mint
			;;
		minix)	osname=minix
			osvers=`$uname -r`
			;;
		netbsd*) osname=netbsd
			osvers="$3"
			;;
		news-os) osvers="$3"
			case "$3" in
			4*) osname=newsos4 ;;
			*) osname=newsos ;;
			esac
			;;
		nonstop-ux) osname=nonstopux ;;
		openbsd) osname=openbsd
			osvers="$3"
			;;
		os2)	osname=os2
			osvers="$4"
			;;
		POSIX-BC | posix-bc ) osname=posix-bc
			osvers="$3"
			;;
		powerux | power_ux | powermax_os | powermaxos | \
		powerunix | power_unix) osname=powerux
			osvers="$3"
			;;
		qnx) osname=qnx
			osvers="$4"
			;;
		solaris) osname=solaris
			case "$3" in
			5*) osvers=`echo $3 | $sed 's/^5/2/g'` ;;
			*)	osvers="$3" ;;
			esac
			;;
		sunos) osname=sunos
			case "$3" in
			5*) osname=solaris
				osvers=`echo $3 | $sed 's/^5/2/g'` ;;
			*)	osvers="$3" ;;
			esac
			;;
		titanos) osname=titanos
			case "$3" in
			1*) osvers=1 ;;
			2*) osvers=2 ;;
			3*) osvers=3 ;;
			4*) osvers=4 ;;
			*)	osvers="$3" ;;
			esac
			;;
		ultrix) osname=ultrix
			osvers="$3"
			;;
		osf1|mls+)	case "$5" in
				alpha)
					osname=dec_osf
					osvers=`sizer -v | awk -FUNIX '{print $2}' | awk '{print $1}' |  tr '[A-Z]' '[a-z]' | sed 's/^[xvt]//'`
					case "$osvers" in
					[1-9].[0-9]*) ;;
					*) osvers=`echo "$3" | sed 's/^[xvt]//'` ;;
					esac
					;;
			hp*)	osname=hp_osf1	;;
			mips)	osname=mips_osf1 ;;
			esac
			;;
		# UnixWare 7.1.2 is known as Open UNIX 8
		openunix|unixware) osname=svr5
			osvers="$4"
			;;
		uts)	osname=uts
			osvers="$3"
			;;
		vos) osvers="$3"
			;;
		$2) case "$osname" in
			*isc*) ;;
			*freebsd*) ;;
			svr*)
				: svr4.x or possibly later
				case "svr$3" in
				${osname}*)
					osname=svr$3
					osvers=$4
					;;
				esac
				case "$osname" in
				svr4.0)
					: Check for ESIX
					if test -f /stand/boot ; then
						eval `grep '^INITPROG=[a-z/0-9]*$' /stand/boot`
						if test -n "$INITPROG" -a -f "$INITPROG"; then
			isesix=`strings -a $INITPROG|grep 'ESIX SYSTEM V/386 Release 4.0'`
							if test -n "$isesix"; then
								osname=esix4
							fi
						fi
					fi
					;;
				esac
				;;
			*)	if test -f /etc/systemid; then
					osname=sco
					set `echo $3 | $sed 's/\./ /g'` $4
					if $test -f $src/hints/sco_$1_$2_$3.sh; then
						osvers=$1.$2.$3
					elif $test -f $src/hints/sco_$1_$2.sh; then
						osvers=$1.$2
					elif $test -f $src/hints/sco_$1.sh; then
						osvers=$1
					fi
				else
					case "$osname" in
					'') : Still unknown.  Probably a generic Sys V.
						osname="sysv"
						osvers="$3"
						;;
					esac
				fi
				;;
			esac
			;;
		*)	case "$osname" in
			'') : Still unknown.  Probably a generic BSD.
				osname="$1"
				osvers="$3"
				;;
			esac
			;;
		esac
	else
		if test -f /vmunix -a -f $src/hints/news_os.sh; then
			(what /vmunix | UU/tr '[A-Z]' '[a-z]') > UU/kernel.what 2>&1
			if $contains news-os UU/kernel.what >/dev/null 2>&1; then
				osname=news_os
			fi
			$rm -f UU/kernel.what
		elif test -d c:/. -o -n "$is_os2" ; then
			set X $myuname
			osname=os2
			osvers="$5"
		fi
	fi

	case "$targetarch" in
	'') ;;
	*)  hostarch=$osname
	    case "$targetarch" in
		nto*|*-nto-*)
		    # Will load qnx.sh, which should change osname to nto
		    osname=qnx
		    osvers=''
		    ;;
		*linux-android*)
		    # Catch arm-linux-androideabi, mipsel-linux-android,
		    # and i686-linux-android
		    osname=linux-android
		    osvers=''
		    ;;
		*linux*)
		    # Something like arm-linux-gnueabihf is really just
		    # plain linux.
		    osname=linux
		    osvers=''
		    ;;
		*solaris*|*sunos*)
		    osname=solaris
		    # XXX perhaps we should just assume
		    # osvers to be 2, or maybe take the value
		    # from targetarch. Using $run before the
		    # hints are run is somewhat icky.
		    set X `$run $uname -a 2>/dev/null`
		    shift
		    case "$3" in
			5*) osvers=`echo $3 | $sed 's/^5/2/g'` ;;
			*)  osvers="$3" ;;
		    esac
		    ;;
		*)
		    osname=`echo $targetarch|sed 's,^[^-]*-,,'`
		    osvers=''
		;;
	    esac
	    ;;
	esac

	: Now look for a hint file osname_osvers, unless one has been
	: specified already.
	case "$hintfile" in
	''|' ')
		file=`echo "${osname}_${osvers}" | $sed -e 's%\.%_%g' -e 's%_$%%'`
		: Also try without trailing minor version numbers.
		xfile=`echo $file | $sed -e 's%_[^_]*$%%'`
		xxfile=`echo $xfile | $sed -e 's%_[^_]*$%%'`
		xxxfile=`echo $xxfile | $sed -e 's%_[^_]*$%%'`
		xxxxfile=`echo $xxxfile | $sed -e 's%_[^_]*$%%'`
		case "$file" in
		'') dflt=none ;;
		*)  case "$osvers" in
			'') dflt=$file
				;;
			*)  if $test -f $src/hints/$file.sh ; then
					dflt=$file
				elif $test -f $src/hints/$xfile.sh ; then
					dflt=$xfile
				elif $test -f $src/hints/$xxfile.sh ; then
					dflt=$xxfile
				elif $test -f $src/hints/$xxxfile.sh ; then
					dflt=$xxxfile
				elif $test -f $src/hints/$xxxxfile.sh ; then
					dflt=$xxxxfile
				elif $test -f "$src/hints/${osname}.sh" ; then
					dflt="${osname}"
				else
					dflt=none
				fi
				;;
			esac
			;;
		esac
		if $test -f Policy.sh ; then
			case "$dflt" in
			*Policy*) ;;
			none) dflt="Policy" ;;
			*) dflt="Policy $dflt" ;;
			esac
		fi
		;;
	*)
		dflt=`echo $hintfile | $sed 's/\.sh$//'`
		;;
	esac

	if $test -f Policy.sh ; then
		$cat <<EOM

There's also a Policy hint file available, which should make the
site-specific (policy) questions easier to answer.
EOM

	fi

	$cat <<EOM

You may give one or more space-separated answers, or "none" if appropriate.
If you have a handcrafted Policy.sh file or a Policy.sh file generated by a
previous run of Configure, you may specify it as well as or instead of
OS-specific hints.  If hints are provided for your OS, you should use them:
although Perl can probably be built without hints on many platforms, using
hints often improve performance and may enable features that Configure can't
set up on its own. If there are no hints that match your OS, specify "none";
DO NOT give a wrong version or a wrong OS.

EOM

	rp="Which of these apply, if any?"
	. UU/myread
	tans=$ans
	for file in $tans; do
		if $test X$file = XPolicy -a -f Policy.sh; then
			. Policy.sh
			$cat Policy.sh >> UU/config.sh
		elif $test -f $src/hints/$file.sh; then
			. $src/hints/$file.sh
			$cat $src/hints/$file.sh >> UU/config.sh
		elif $test X"$tans" = X -o X"$tans" = Xnone ; then
			: nothing
		else
			: Give one chance to correct a possible typo.
			echo "$file.sh does not exist"
			dflt=$file
			rp="hint to use instead?"
			. UU/myread
			for file in $ans; do
				if $test -f "$src/hints/$file.sh"; then
					. $src/hints/$file.sh
					$cat $src/hints/$file.sh >> UU/config.sh
				elif $test X$ans = X -o X$ans = Xnone ; then
					: nothing
				else
					echo "$file.sh does not exist -- ignored."
				fi
			done
		fi
	done

	hint=recommended
	: Remember our hint file for later.
	if $test -f "$src/hints/$file.sh" ; then
		hintfile="$file"
	else
		hintfile=''
	fi
fi
cd UU
;;
*)
	echo " "
	echo "Fetching default answers from $config_sh..." >&4
	tmp_n="$n"
	tmp_c="$c"
	cd ..
	cp $config_sh config.sh 2>/dev/null
	chmod +w config.sh
	. ./config.sh
	cd UU
	cp ../config.sh .
	n="$tmp_n"
	c="$tmp_c"
	hint=previous
	;;
esac
. ./optdef.sh

: Restore computed paths
for file in $loclist $trylist; do
	eval $file="\$_$file"
done

cat << EOM

Configure uses the operating system name and version to set some defaults.
The default value is probably right if the name rings a bell. Otherwise,
since spelling matters for me, either accept the default or answer "none"
to leave it blank.

EOM
case "$osname" in
	''|' ')
		case "$hintfile" in
		''|' '|none) dflt=none ;;
		*)  dflt=`echo $hintfile | $sed -e 's/\.sh$//' -e 's/_.*$//'` ;;
		esac
		;;
	*) dflt="$osname" ;;
esac
rp="Operating system name?"
. ./myread
case "$ans" in
none)  osname='' ;;
*) osname=`echo "$ans" | $sed -e 's/[ 	][	]*/_/g' | ./tr '[A-Z]' '[a-z]'`;;
esac
echo " "
case "$osvers" in
	''|' ')
		case "$hintfile" in
		''|' '|none) dflt=none ;;
		*)	dflt=`echo $hintfile | $sed -e 's/\.sh$//' -e 's/^[^_]*//'`
			dflt=`echo $dflt | $sed -e 's/^_//' -e 's/_/./g'`
			case "$dflt" in
			''|' ') dflt=none ;;
			esac
			;;
		esac
		;;
	*) dflt="$osvers" ;;
esac
rp="Operating system version?"
. ./myread
case "$ans" in
none)  osvers='' ;;
*) osvers="$ans" ;;
esac


. ./posthint.sh

: who configured the system
cf_time=`LC_ALL=C; LANGUAGE=C; export LC_ALL; export LANGUAGE; $date 2>&1`
case "$cf_by" in
"")
	cf_by=`(logname) 2>/dev/null`
	case "$cf_by" in
	"")
		cf_by=`(whoami) 2>/dev/null`
		case "$cf_by" in
		"") cf_by=unknown ;;
		esac ;;
	esac ;;
esac

: decide how portable to be.  Allow command line overrides.
case "$d_portable" in
"$undef") ;;
*)	d_portable="$define" ;;
esac

: set up shell script to do ~ expansion
cat >filexp <<EOSS
$startsh
: expand filename
case "\$1" in
 \~/*|\~)
	echo \$1 | $sed "s|~|\${HOME-\$LOGDIR}|"
	;;
 \~*)
	if $test -f /bin/csh; then
		/bin/csh -f -c "glob \$1"
		failed=\$?
		echo ""
		exit \$failed
	else
		name=\`$expr x\$1 : '..\([^/]*\)'\`
		dir=\`$sed -n -e "/^\${name}:/{s/^[^:]*:[^:]*:[^:]*:[^:]*:[^:]*:\([^:]*\).*"'\$'"/\1/" -e p -e q -e '}' </etc/passwd\`
		if $test ! -d "\$dir"; then
			me=\`basename \$0\`
			echo "\$me: can't locate home directory for: \$name" >&2
			exit 1
		fi
		case "\$1" in
		*/*)
			echo \$dir/\`$expr x\$1 : '..[^/]*/\(.*\)'\`
			;;
		*)
			echo \$dir
			;;
		esac
	fi
	;;
*)
	echo \$1
	;;
esac
EOSS
chmod +x filexp
$eunicefix filexp

: now set up to get a file name
cat <<EOS >getfile
$startsh
EOS
cat <<'EOSC' >>getfile
tilde=''
fullpath=''
already=''
skip=''
none_ok=''
exp_file=''
nopath_ok=''
orig_rp="$rp"
orig_dflt="$dflt"
case "$gfpth" in
'') gfpth='.' ;;
esac

case "$fn" in
*\(*)
	: getfile will accept an answer from the comma-separated list
	: enclosed in parentheses even if it does not meet other criteria.
	expr "$fn" : '.*(\(.*\)).*' | $tr ',' $trnl >getfile.ok
	fn=`echo $fn | sed 's/(.*)//'`
	;;
esac

case "$fn" in
*:*)
	loc_file=`expr $fn : '.*:\(.*\)'`
	fn=`expr $fn : '\(.*\):.*'`
	;;
esac

case "$fn" in
*~*) tilde=true;;
esac
case "$fn" in
*/*) fullpath=true;;
esac
case "$fn" in
*+*) skip=true;;
esac
case "$fn" in
*n*) none_ok=true;;
esac
case "$fn" in
*e*) exp_file=true;;
esac
case "$fn" in
*p*) nopath_ok=true;;
esac

case "$fn" in
*f*) type='File';;
*d*) type='Directory';;
*l*) type='Locate';;
esac

what="$type"
case "$what" in
Locate) what='File';;
esac

case "$exp_file" in
'')
	case "$d_portable" in
	"$define") ;;
	*) exp_file=true;;
	esac
	;;
esac

cd ..
while test "$type"; do
	redo=''
	rp="$orig_rp"
	dflt="$orig_dflt"
	case "$tilde" in
	true) rp="$rp (~name ok)";;
	esac
	. UU/myread
	if test -f UU/getfile.ok && \
		$contains "^$ans\$" UU/getfile.ok >/dev/null 2>&1
	then
		value="$ans"
		ansexp="$ans"
		break
	fi
	case "$ans" in
	none)
		value=''
		ansexp=''
		case "$none_ok" in
		true) type='';;
		esac
		;;
	*)
		case "$tilde" in
		'') value="$ans"
			ansexp="$ans";;
		*)
			value=`UU/filexp $ans`
			case $? in
			0)
				if test "$ans" != "$value"; then
					echo "(That expands to $value on this system.)"
				fi
				;;
			*) value="$ans";;
			esac
			ansexp="$value"
			case "$exp_file" in
			'') value="$ans";;
			esac
			;;
		esac
		case "$fullpath" in
		true)
			case "$ansexp" in
			/*) value="$ansexp" ;;
			[a-zA-Z]:/*) value="$ansexp" ;;
			*)
				redo=true
				case "$already" in
				true)
				echo "I shall only accept a full path name, as in /bin/ls." >&4
				echo "Use a ! shell escape if you wish to check pathnames." >&4
					;;
				*)
				echo "Please give a full path name, starting with slash." >&4
					case "$tilde" in
					true)
				echo "Note that using ~name is ok provided it expands well." >&4
						already=true
						;;
					esac
				esac
				;;
			esac
			;;
		esac
		case "$redo" in
		'')
			case "$type" in
			File)
				for fp in $gfpth; do
					if test "X$fp" = X.; then
					    pf="$ansexp"
					else    
					    pf="$fp/$ansexp"
					fi
					if test -f "$pf"; then
						type=''
					elif test -r "$pf" || (test -h "$pf") >/dev/null 2>&1
					then
						echo "($value is not a plain file, but that's ok.)"
						type=''
					fi
					if test X"$type" = X; then
					    value="$pf"
					    break
					fi
				done
				;;
			Directory)
				for fp in $gfpth; do
					if test "X$fp" = X.; then
					    dir="$ans"
					    direxp="$ansexp"
					else    
					    dir="$fp/$ansexp"
					    direxp="$fp/$ansexp"
					fi
					if test -d "$direxp"; then
						type=''
						value="$dir"
						break
					fi
				done
				;;
			Locate)
				if test -d "$ansexp"; then
					echo "(Looking for $loc_file in directory $value.)"
					value="$value/$loc_file"
					ansexp="$ansexp/$loc_file"
				fi
				if test -f "$ansexp"; then
					type=''
				fi
				case "$nopath_ok" in
				true)	case "$value" in
					*/*) ;;
					*)	echo "Assuming $value will be in people's path."
						type=''
						;;
					esac
					;;
				esac
				;;
			esac

			case "$skip" in
			true) type='';
			esac

			case "$type" in
			'') ;;
			*)
				if test "$fastread" = yes; then
					dflt=y
				else
					dflt=n
				fi
				rp="$what $value doesn't exist.  Use that name anyway?"
				. UU/myread
				dflt=''
				case "$ans" in
				y*) type='';;
				*) echo " ";;
				esac
				;;
			esac
			;;
		esac
		;;
	esac
done
cd UU
ans="$value"
rp="$orig_rp"
dflt="$orig_dflt"
rm -f getfile.ok
test "X$gfpthkeep" != Xy && gfpth=""
EOSC

: determine root of directory hierarchy where package will be installed.
case "$prefix" in
'')	dflt=`./loc . /usr/local /usr/local /local /opt /usr`
	;;
*)	dflt="$prefix"
	;;
esac
$cat <<EOM

By default, $package will be installed in $dflt/bin, manual pages
under $dflt/man, etc..., i.e. with $dflt as prefix for all
installation directories. Typically this is something like /usr/local.
If you wish to have binaries under /usr/bin but other parts of the
installation under /usr/local, that's ok: you will be prompted
separately for each of the installation directories, the prefix being
only used to set the defaults.

EOM
fn=d~
rp='Installation prefix to use?'
. ./getfile
oldprefix=''
case "$prefix" in
'')	;;
*)	case "$ans" in
	"$prefix") ;;
	*) oldprefix="$prefix";;
	esac
	;;
esac

case "$ans" in
*?/)	prefix=`echo "$ans" | sed 's/.$//'`
	;;
*)	prefix="$ans"
esac

case "$ansexp" in
*?/)	prefixexp=`echo "$ansexp" | sed 's/.$//'`
	;;
*)	prefixexp="$ansexp"
esac

: allow them to override the AFS root
case "$afsroot" in
'')	afsroot=/afs ;;
*)	afsroot=$afsroot ;;
esac

: is AFS running?
echo " "
case "$afs" in
$define|true)	afs=true ;;
$undef|false)	afs=false ;;
*)	if $test -d $afsroot; then
		afs=true
	else
		afs=false
	fi
	;;
esac
if $afs; then
	echo "AFS may be running... I'll be extra cautious then..." >&4
else
	echo "AFS does not seem to be running..." >&4
fi

: determine installation prefix for where package is to be installed.
if $afs; then
$cat <<EOM

Since you are running AFS, I need to distinguish the directory in which
files will reside from the directory in which they are installed (and from
which they are presumably copied to the former directory by occult means).

EOM
	case "$installprefix" in
	'') dflt=`echo $prefix | sed 's#^/afs/#/afs/.#'`;;
	*) dflt="$installprefix";;
	esac
else
$cat <<EOM

In some special cases, particularly when building $package for distribution,
it is convenient to distinguish the directory in which files should be
installed from the directory ($prefix) in which they will
eventually reside.  For most users, these two directories are the same.

EOM
	case "$installprefix" in
	'') dflt=$prefix ;;
	*) dflt=$installprefix;;
	esac
fi
fn=d~
rp='What installation prefix should I use for installing files?'
. ./getfile
installprefix="$ans"
installprefixexp="$ansexp"

: Perform the prefixexp/installprefixexp correction if necessary
cat <<EOS >installprefix
$startsh
EOS
cat <<'EOSC' >>installprefix
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
    eval "install${prefixvar}=\`echo \$${prefixvar}exp | sed \"s#^\$prefixexp#\$installprefixexp#\"\`"
else
    eval "install${prefixvar}=\"\$${prefixvar}exp\""
fi
EOSC
chmod +x installprefix
$eunicefix installprefix

: Set variables such as privlib and privlibexp from the output of ./getfile
: performing the prefixexp/installprefixexp correction if necessary.
cat <<EOS >setprefixvar
$startsh
EOS
cat <<'EOSC' >>setprefixvar
eval "${prefixvar}=\"\$ans\""
eval "${prefixvar}exp=\"\$ansexp\""
. ./installprefix
EOSC
chmod +x setprefixvar
$eunicefix setprefixvar

: set up the script used to warn in case of inconsistency
cat <<EOS >whoa
$startsh
EOS
cat <<'EOSC' >>whoa
dflt=y
case "$hint" in
    recommended)
	case "$hintfile" in
	'')	echo "The $hint value for \$$var on this machine was \"$was\"!" >&4
		;;
	*)	echo "Hmm.  Based on the hints in hints/$hintfile.sh, " >&4
		echo "the $hint value for \$$var on this machine was \"$was\"!" >&4
		;;
	esac
	;;
    *)	echo " "
	echo "*** WHOA THERE!!! ***" >&4
	echo "    The $hint value for \$$var on this machine was \"$was\"!" >&4
	;;
esac
rp="    Keep the $hint value?"
. ./myread
case "$ans" in
y) td=$was; tu=$was;;
esac
EOSC

: function used to set '$1' to '$val'
setvar='var=$1; eval "was=\$$1"; td=$define; tu=$undef;
case "$val$was" in
$define$undef) . ./whoa; eval "$var=\$td";;
$undef$define) . ./whoa; eval "$var=\$tu";;
*) eval "$var=$val";;
esac'

: Do we want threads support and if so, what type
case "$usethreads" in
$define|true|[yY]*)     dflt='y';;
*)     # Catch case where user specified ithreads but
       # forgot -Dusethreads (A.D. 4/2002)
       case "$useithreads" in
       *$define*)	dflt='y';;
       *)		dflt='n';;
       esac
       ;;
esac
cat <<EOM

Perl can be built to offer a form of threading support on some systems
To do so, Configure can be run with -Dusethreads.

Note that Perl built with threading support runs slightly slower
and uses slightly more memory than plain Perl.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Build a threading Perl?'
. ./myread
case "$ans" in
y|Y)    val="$define" ;;
*)      val="$undef" ;;
esac
set usethreads
eval $setvar

useithreads="$usethreads"

case "$d_oldpthreads" in
'')	: Configure tests would be welcome here.  For now, assume undef.
	val="$undef" ;;
*)	val="$d_oldpthreads" ;;
esac
set d_oldpthreads
eval $setvar


: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that a threading perl is to be built,
: we may need to set or change some other defaults.
if $test -f usethreads.cbu; then
    echo "Your platform has some specific hints regarding threaded builds, using them..."
    . ./usethreads.cbu
else
    case "$usethreads" in
	"$define"|true|[yY]*)
		$cat <<EOM
(Your platform does not have any specific hints for threaded builds.
 Assuming POSIX threads, then.)
EOM
	;;
    esac
fi

: Check if multiplicity is required
cat <<EOM

Perl can be built so that multiple Perl interpreters can coexist
within the same Perl executable.
EOM

case "$useithreads" in
$define)
	cat <<EOM
This multiple interpreter support is required for interpreter-based threads.
EOM
	val="$define"
	;;
*)	case "$usemultiplicity" in
	$define|true|[yY]*)	dflt='y';;
	*) dflt='n';;
	esac
	echo " "
	echo "If this doesn't make any sense to you, just accept the default '$dflt'."
	rp='Build Perl for multiplicity?'
	. ./myread
	case "$ans" in
	y|Y)	val="$define" ;;
	*)      val="$undef" ;;
	esac
	;;
esac
set usemultiplicity
eval $setvar

: Check if morebits is requested
case "$usemorebits" in
"$define"|true|[yY]*)
	use64bitint="$define"
	uselongdouble="$define"
	usemorebits="$define"
	;;
*)	usemorebits="$undef"
	;;
esac

: Determine the C compiler to be used
echo " "
case "$cc" in
'') dflt=cc;;
*) dflt="$cc";;
esac
rp="Use which C compiler?"
. ./myread
cc="$ans"

: See whether they have no cc but they do have gcc
. ./trygcc
if $test -f cc.cbu; then
    . ./cc.cbu
fi
. ./checkcc

: make some quick guesses about what we are up against
echo " "
$echo $n "Hmm...  $c"
echo exit 1 >bsd
echo exit 1 >usg
echo exit 1 >v7
echo exit 1 >osf1
echo exit 1 >eunice
echo exit 1 >xenix
echo exit 1 >venix
echo exit 1 >os2
d_bsd="$undef"
$cat $sysroot/usr/include/signal.h $sysroot/usr/include/sys/signal.h >foo 2>/dev/null
if test -f /osf_boot || $contains 'OSF/1' $sysroot/usr/include/ctype.h >/dev/null 2>&1
then
	echo "Looks kind of like an OSF/1 system, but we'll see..."
	echo exit 0 >osf1
elif test `echo abc | $tr a-z A-Z` = Abc ; then
	xxx=`./loc addbib blurfl $pth`
	if $test -f $xxx; then
	echo "Looks kind of like a USG system with BSD features, but we'll see..."
		echo exit 0 >bsd
		echo exit 0 >usg
	else
		if $contains SIGTSTP foo >/dev/null 2>&1 ; then
			echo "Looks kind of like an extended USG system, but we'll see..."
		else
			echo "Looks kind of like a USG system, but we'll see..."
		fi
		echo exit 0 >usg
	fi
elif $contains SIGTSTP foo >/dev/null 2>&1 ; then
	echo "Looks kind of like a BSD system, but we'll see..."
	d_bsd="$define"
	echo exit 0 >bsd
else
	echo "Looks kind of like a Version 7 system, but we'll see..."
	echo exit 0 >v7
fi
case "$eunicefix" in
*unixtovms*)
	$cat <<'EOI'
There is, however, a strange, musty smell in the air that reminds me of
something...hmm...yes...I've got it...there's a VMS nearby, or I'm a Blit.
EOI
	echo exit 0 >eunice
	d_eunice="$define"
: it so happens the Eunice I know will not run shell scripts in Unix format
	;;
*)
	echo " "
	echo "Congratulations.  You aren't running Eunice."
	d_eunice="$undef"
	;;
esac
: Detect OS2.  The p_ variable is set above in the Head.U unit.
: Note that this also -- wrongly -- detects e.g. dos-djgpp, which also uses
: semicolon as a patch separator
case "$p_" in
:) ;;
*)
	$cat <<'EOI'
I have the feeling something is not exactly right, however...don't tell me...
lemme think...does HAL ring a bell?...no, of course, you're only running OS/2!
(Or you may be running DOS with DJGPP.)
EOI
	echo exit 0 >os2
	;;
esac
if test -f /xenix; then
	echo "Actually, this looks more like a XENIX system..."
	echo exit 0 >xenix
	d_xenix="$define"
else
	echo " "
	echo "It's not Xenix..."
	d_xenix="$undef"
fi
chmod +x xenix
$eunicefix xenix
if test -f /venix; then
	echo "Actually, this looks more like a VENIX system..."
	echo exit 0 >venix
else
	echo " "
	if ./xenix; then
		: null
	else
		echo "Nor is it Venix..."
	fi
fi
chmod +x bsd usg v7 osf1 eunice xenix venix os2
$eunicefix bsd usg v7 osf1 eunice xenix venix os2
$rm -f foo

: Check if we are using GNU gcc and what its version is
echo " "
echo "Checking for GNU cc in disguise and/or its version number..." >&4
$cat >try.c <<EOM
#include <stdio.h>
int main() {
#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
#ifdef __VERSION__
	printf("%s\n", __VERSION__);
#else
	printf("%s\n", "1");
#endif
#endif
	return(0);
}
EOM
if $cc -o try $ccflags $ldflags try.c; then
	gccversion=`$run ./try`
	case "$gccversion" in
	'') echo "You are not using GNU cc." ;;
	*)  echo "You are using GNU cc $gccversion."
	    ccname=gcc
	    ;;
	esac
else
	echo " "
	echo "*** WHOA THERE!!! ***" >&4
	echo "    Your C compiler \"$cc\" doesn't seem to be working!" >&4
	case "$knowitall" in
	'')
	echo "    You'd better start hunting for one and let me know about it." >&4
		exit 1
		;;
	esac
fi
$rm -f try try.*
case "$gccversion" in
1.*) cpp=`./loc gcc-cpp $cpp $pth` ;;
esac
case "$gccversion" in
'') gccosandvers='' ;;
*) gccshortvers=`echo "$gccversion"|sed 's/ .*//'`
   gccosandvers=`$cc -v 2>&1|grep '/specs$'|sed "s!.*/[^-/]*-[^-/]*-\([^-/]*\)/$gccshortvers/specs!\1!"`
   gccshortvers=''
   case "$gccosandvers" in
   $osname) gccosandvers='' ;; # linux gccs seem to have no linux osvers, grr
   $osname$osvers) ;; # looking good
   $osname*) cat <<EOM >&4

*** WHOA THERE!!! ***

    Your gcc has not been compiled for the exact release of
    your operating system ($gccosandvers versus $osname$osvers).

    In general it is a good idea to keep gcc synchronized with
    the operating system because otherwise serious problems
    may ensue when trying to compile software, like Perl.

    I'm trying to be optimistic here, though, and will continue.
    If later during the configuration and build icky compilation
    problems appear (headerfile conflicts being the most common
    manifestation), I suggest reinstalling the gcc to match
    your operating system release.

EOM
      ;;
   *) gccosandvers='' ;; # failed to parse, better be silent
   esac
   ;;
esac
case "$ccname" in
'') ccname="$cc" ;;
esac

# gcc 3.* complain about adding -Idirectories that they already know about,
# so we will take those off from locincpth.
case "$gccversion" in
3.*)
    echo "int main(){}">try.c
    for incdir in $locincpth; do
       warn=`$cc $ccflags -I$incdir -c try.c 2>&1 | \
	     grep '^c[cp]p*[01]: warning: changing search order '`
       if test "X$warn" != X; then
	   locincpth=`echo " $locincpth " | sed "s! $incdir ! !"`
       fi
    done
    $rm -f try try.*
esac

# gcc 4.9 by default does some optimizations that break perl.
# see ticket 121505.
#
# The -fwrapv disables those optimizations (and probably others,) so
# for gcc 4.9 (and later, since the optimizations probably won't go
# away), add -fwrapv unless the user requests -fno-wrapv, which
# disables -fwrapv, or if the user requests -fsanitize=undefined,
# which turns the overflows -fwrapv ignores into runtime errors.
case "$gccversion" in
4.[3-9].*|4.[1-9][0-9]*|[5-9].*|[1-9][0-9]*)
    case "$ccflags" in
    *-fno-wrapv*|*-fsanitize=undefined*|*-fwrapv*) ;;
    *) ccflags="$ccflags -fwrapv" ;;
    esac
esac

# Really old versions of gcc default to C89 and will error for this code.
# See if the compiler (gcc or otherwise) needs a flag to compile C99 code
# Initialisations in for loops seem to be the particular problem
# (Does this syntax conflict with something else that was valid C89?)
# We also add a declaration after a statement to detect whether the compiler
# (or the user supplied -Accflags) consider such declarations to be errors.
# This causes 'Configure with -Accflags="-Werror=declaration-after-statement"'
# to fail hard and early.
#
# Annoyingly -std=c99 will cause gcc to tell glibc not to define prototypes for
# syscall, drand48 etc when including <unistd.h>, which messes up our build.
# I guess we *could* loop round trying -std=c99 first with checks both for the
# prototype found and the code compiling (because -std=gnu99 might do other
# things we don't want, particularly on non-GCC compilers) but
# 1) We would need to check for the prototype first (without any flags)
# 2) We would still end up with most Linux systems either being -std=gnu99
#    or "" (no flag), and so both common options would not rigorously check our
#    portability to other platforms.
# So it doesn't seem worth the complexity and chance of different failure.
$cat >try.c <<'EOCP'
int main(int argc, char **argv) {
    argc = argc + 1;
    /* This is deliberately a declaration after a statement. */
    unsigned long long count = 0;
    for (char **p = argv; *p; ++p) {
        ++count;
    }
    return count == 1 ? 0 : argc;
}
EOCP
c99_for=no
for flag in '' '-std=gnu99' '-std=c99'; do
    if $cc -o try $flag $ccflags $ldflags try.c 2>/dev/null && ./try; then
        c99_for="$flag"
        break;
    fi
done
case "$c99_for" in
'') echo "Your C compiler doesn't need any special flags to compile C99 code"
    ;;
no) echo >&4 "Your C compiler doesn't seem to be able to compile C99 code"
    rp='Do you really want to continue?'
    dflt='n'
    . ./myread
    case "$ans" in
	[yY])	echo >&4 "Okay, continuing."	;;
	*)	exit 1				;;
    esac
    ;;
*)  echo "Your C compiler needs $c99_for to compile C99 code"
    ccflags="$c99_for $ccflags"
    ;;
esac
$rm -f try try.*

: What should the include directory be ?
: Use sysroot if set, so findhdr looks in the right place.
echo " "
$echo $n "Hmm...  $c"
dflt="$sysroot/usr/include"
incpath=''
mips_type=''
if $test -f /bin/mips && /bin/mips; then
	echo "Looks like a MIPS system..."
	$cat >usr.c <<'EOCP'
#ifdef SYSTYPE_BSD43
/bsd43
#endif
EOCP
	if $cc $cppflags -E usr.c > usr.out && $contains / usr.out >/dev/null 2>&1; then
		dflt='/bsd43/usr/include'
		incpath='/bsd43'
		mips_type='BSD 4.3'
	else
		mips_type='System V'
	fi
	$rm -f usr.c usr.out
	echo "and you're compiling with the $mips_type compiler and libraries."
	xxx_prompt=y
	echo "exit 0" >mips
else
	echo "Doesn't look like a MIPS system."
	xxx_prompt=n
	echo "exit 1" >mips
fi
chmod +x mips
$eunicefix mips
case "$usrinc" in
'') ;;
*) dflt="$usrinc";;
esac
case "$xxx_prompt" in
y)	fn=d/
	echo " "
	rp='Where are the include files you want to use?'
	. ./getfile
	usrinc="$ans"
	;;
*)	usrinc="$dflt"
	;;
esac

: see how we invoke the C preprocessor
echo " "
echo "Now, how can we feed standard input to your C preprocessor..." >&4
cat <<'EOT' >testcpp.c
#define ABC abc
#define XYZ xyz
ABC.XYZ
EOT
cd ..
if test ! -f cppstdin; then
	if test "X$osname" = "Xaix" -a "X$gccversion" = X; then
		# AIX cc -E doesn't show the absolute headerfile
		# locations but we'll cheat by using the -M flag.
		echo 'cat >.$$.c; rm -f .$$.u; '"$cc"' ${1+"$@"} -M -c .$$.c 2>/dev/null; test -s .$$.u && awk '"'"'$2 ~ /\.h$/ { print "# 0 \""$2"\"" }'"'"' .$$.u; rm -f .$$.o .$$.u; '"$cc"' -E ${1+"$@"} .$$.c; rm .$$.c' > cppstdin
	else
		echo 'cat >.$$.c; '"$cc $cppflags"' -E ${1+"$@"} .$$.c; rm .$$.c' >cppstdin
	fi
else
	echo "Keeping your $hint cppstdin wrapper."
fi
chmod 755 cppstdin
wrapper=`pwd`/cppstdin
ok='false'
cd UU

if $test "X$cppstdin" != "X" && \
	$cppstdin $cppminus <testcpp.c >testcpp.out 2>&1 && \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1
then
	echo "You used to use $cppstdin $cppminus so we'll use that again."
	case "$cpprun" in
	'') echo "But let's see if we can live without a wrapper..." ;;
	*)
		if $cpprun $cpplast <testcpp.c >testcpp.out 2>&1 && \
			$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1
		then
			echo "(And we'll use $cpprun $cpplast to preprocess directly.)"
			ok='true'
		else
			echo "(However, $cpprun $cpplast does not work, let's see...)"
		fi
		;;
	esac
else
	case "$cppstdin" in
	'') ;;
	*)
		echo "Good old $cppstdin $cppminus does not seem to be of any help..."
		;;
	esac
fi

if $ok; then
	: nothing
elif echo 'Maybe "'"$cc"' -E" will work...'; \
	$cc -E <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yup, it does."
	x_cpp="$cc $cppflags -E"
	x_minus='';
elif echo 'Nope...maybe "'"$cc"' -E -" will work...'; \
	$cc -E - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yup, it does."
	x_cpp="$cc $cppflags -E"
	x_minus='-';
elif echo 'Nope...maybe "'"$cc"' -P" will work...'; \
	$cc -P <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yipee, that works!"
	x_cpp="$cc $cppflags -P"
	x_minus='';
elif echo 'Nope...maybe "'"$cc"' -P -" will work...'; \
	$cc -P - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "At long last!"
	x_cpp="$cc $cppflags -P"
	x_minus='-';
elif echo 'No such luck, maybe "'$cpp'" will work...'; \
	$cpp <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "It works!"
	x_cpp="$cpp $cppflags"
	x_minus='';
elif echo 'Nixed again...maybe "'$cpp' -" will work...'; \
	$cpp - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Hooray, it works!  I was beginning to wonder."
	x_cpp="$cpp $cppflags"
	x_minus='-';
elif echo 'Uh-uh.  Time to get fancy.  Trying a wrapper...'; \
	$wrapper <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	x_cpp="$wrapper"
	x_minus=''
	echo "Eureka!"
else
	dflt=''
	rp="No dice.  I can't find a C preprocessor.  Name one:"
	. ./myread
	x_cpp="$ans"
	x_minus=''
	$x_cpp <testcpp.c >testcpp.out 2>&1
	if $contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
		echo "OK, that will do." >&4
	else
echo "Sorry, I can't get that to work.  Go find one and rerun Configure." >&4
		exit 1
	fi
fi

case "$ok" in
false)
	cppstdin="$x_cpp"
	cppminus="$x_minus"
	cpprun="$x_cpp"
	cpplast="$x_minus"
	set X $x_cpp
	shift
	case "$1" in
	"$cpp")
		echo "Perhaps can we force $cc -E using a wrapper..."
		if $wrapper <testcpp.c >testcpp.out 2>&1; \
			$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1
		then
			echo "Yup, we can."
			cppstdin="$wrapper"
			cppminus='';
		else
			echo "Nope, we'll have to live without it..."
		fi
		;;
	esac
	case "$cpprun" in
	"$wrapper")
		cpprun=''
		cpplast=''
		;;
	esac
	;;
esac

case "$cppstdin" in
"$wrapper"|'cppstdin') ;;
*) $rm -f $wrapper;;
esac
$rm -f testcpp.c testcpp.out

: Adjust cppfilter for path component separator
case "$osname" in
vos) cppfilter="tr '\\\\>' '/' |" ;; # path component separator is >
os2) cppfilter="sed -e 's|\\\\\\\\|/|g' |" ;; # path component separator is \
*)   cppfilter='' ;;
esac

: Use gcc to determine libpth and incpth
# If using gcc or clang, we can get better values for libpth, incpth
# and usrinc directly from the compiler.
# Note that ccname for clang is also gcc.
case "$ccname" in
    gcc)
	realpath=`which realpath 2>/dev/null | sed 's/no realpath in.*//'`
	$echo 'extern int foo;' > try.c
	set X `$cppstdin -v try.c 2>&1 | $awk '/^#include </,/^End of search /'|$cppfilter $grep '/include'`
	shift
	inclibpth=""
	if $test $# -gt 0; then
	    for i in $*; do
		case $realpath in
		    */realpath) i=`$realpath $i` ;;
		esac
		incpth="$incpth $i"
		j="`$echo $i | $sed 's,/include[^/]*,/lib,'`"
		if $test -d $j; then
		    inclibpth="$inclibpth $j"
		fi
	    done
	    incpth="`$echo $incpth | $sed 's/^ //'`"
	    for xxx in $inclibpth $loclibpth $plibpth $glibpth; do
		if $test -d $xxx; then
		    case $realpath in
			*/realpath) xxx=`$realpath $xxx` ;;
		    esac
		    case " $libpth " in
		    *" $xxx "*) ;;
		    *) libpth="$libpth $xxx";;
		    esac
		fi
	    done
	    libpth="`$echo $libpth | $sed 's/^ //'`"
	fi
	$rm -f try.c
	case "$usrinc" in
	'') for i in $incpth; do
		if $test -f $i/errno.h -a -f $i/stdio.h -a -f $i/time.h; then
		    usrinc="$i"
		    break
		fi
	    done
	    ;;
	esac

	case "$usecrosscompile" in
	$define|true|[yY]*)
	    case "$incpth" in
		'') echo "Incpth not defined." >&4; croak=y ;;
		*)  echo "Using incpth '$incpth'." >&4 ;;
	    esac
	    case "$libpth" in
		'') echo "Libpth not defined." >&4; croak=y ;;
		*)  echo "Using libpth '$libpth'." >&4 ;;
	    esac
	    case "$usrinc" in
		'') echo "Usrinc not defined." >&4; croak=y ;;
		*)  echo "Using usrinc $usrinc." >&4 ;;
	    esac
	    case "$croak" in
		y)
		if test "X$sysroot" = X; then
		    echo "Cannot continue, aborting." >&4; exit 1
		else
		    echo "Cross-compiling using sysroot $sysroot, failing to guess inc/lib paths is not fatal" >&4
		fi
		;;
	    esac
	    ;;
	esac
    ;;
esac

: Default value for incpth is just usrinc
case "$incpth" in
'') incpth="$usrinc";;
esac

: Set private lib path
case "$plibpth" in
'') if ./mips; then
	plibpth="$incpath/usr/lib $sysroot/usr/local/lib $sysroot/usr/ccs/lib"
    fi;;
esac
case "$libpth" in
' ') dlist='';;
'') dlist="$loclibpth $plibpth $glibpth";;
*) dlist="$libpth";;
esac

: Now check and see which directories actually exist, avoiding duplicates
for xxx in $dlist
do
    if $test -d $xxx; then
		case " $libpth " in
		*" $xxx "*) ;;
		*) libpth="$libpth $xxx";;
		esac
    fi
done
$cat <<'EOM'

Some systems have incompatible or broken versions of libraries.  Among
the directories listed in the question below, please remove any you
know not to be holding relevant libraries, and add any that are needed.
Say "none" for none.

EOM

if test "X$sysroot" != X; then
    $cat <<EOM
You have set sysroot to $sysroot, please supply the directories excluding sysroot

EOM
fi

case "$libpth" in
'') dflt='none';;
*)
	set X $libpth
	shift
	dflt=${1+"$@"}
	;;
esac
rp="Directories to use for library searches?"
. ./myread
case "$ans" in
none) libpth=' ';;
*) libpth="$ans";;
esac

: compute shared library extension
case "$so" in
'')
	if xxx=`./loc libc.sl X $libpth`; $test -f "$xxx"; then
		dflt='sl'
	else
		dflt='so'
	fi
	;;
*) dflt="$so";;
esac
$cat <<EOM

On some systems, shared libraries may be available.  Answer 'none' if
you want to suppress searching of shared libraries for the remainder
of this configuration.

EOM
rp='What is the file extension used for shared libraries?'
. ./myread
so="$ans"

: Does target system insist that shared library basenames are unique
$cat << EOM

Some dynamic loaders assume that the *basename* of shared library filenames
are globally unique.  We'll default this to undef as we assume your system
is not this weird. Set to defined if you're on one of them.

EOM

dflt='n'
rp='Make shared library basenames unique?'
. ./myread
case "$ans" in
y|Y) val="$define" ;;
*)   val="$undef"  ;;
esac
set d_libname_unique
eval $setvar

: Define several unixisms.
: Hints files or command line option can be used to override them.
: The convoluted testing is in case hints files set either the old
: or the new name.
case "$_exe" in
'')	case "$exe_ext" in
	'')	;;
	*)	_exe="$exe_ext" ;;
	esac
	;;
esac
case "$_a" in
'')	case "$lib_ext" in
    '')	_a='.a';;
	*)	_a="$lib_ext" ;;
	esac
	;;
esac
case "$_o" in
'') case "$obj_ext" in
	'')	_o='.o';;
	*)	_o="$obj_ext";;
	esac
	;;
esac
case "$p_" in
'') case "$path_sep" in
	'')	p_=':';;
	*)	p_="$path_sep";;
	esac
	;;
esac
exe_ext=$_exe
lib_ext=$_a
obj_ext=$_o
path_sep=$p_

rm_try="$rm -f try try$_exe a.out .out try.[cho] try.$_o core core.try* try.core*"

: Which makefile gets called first.  This is used by make depend.
case "$firstmakefile" in
'') firstmakefile='makefile';;
esac

: Check is we will use socks
case "$usesocks" in
$define|true|[yY]*)	dflt='y';;
*) dflt='n';;
esac
cat <<EOM

Perl can be built to use the SOCKS proxy protocol library.  To do so,
Configure must be run with -Dusesocks.  If you use SOCKS you also need
to use the PerlIO abstraction layer, this will be implicitly selected.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Build Perl for SOCKS?'
. ./myread
case "$ans" in
y|Y)	val="$define" ;;
*)      val="$undef" ;;
esac
set usesocks
eval $setvar

: Check for uselongdouble support
case "$ccflags" in
*-DUSE_LONG_DOUBLE*|*-DUSE_MORE_BITS*) uselongdouble="$define" ;;
esac

case "$uselongdouble" in
$define|true|[yY]*)	dflt='y';;
*) dflt='n';;
esac
cat <<EOM

Perl can be built to take advantage of long doubles which
(if available) may give more accuracy and range for floating point numbers.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Try to use long doubles if available?'
. ./myread
case "$ans" in
y|Y)	val="$define"	;;
*)      val="$undef"	;;
esac
set uselongdouble
eval $setvar

case "$uselongdouble" in
true|[yY]*) uselongdouble="$define" ;;
esac

: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that long doubles should be used,
: we may need to set or change some other defaults.
if $test -f uselongdouble.cbu; then
    echo "Your platform has some specific hints regarding long doubles, using them..."
    . ./uselongdouble.cbu
else
    case "$uselongdouble" in
	$define)
		$cat <<EOM
(Your platform does not have any specific hints for long doubles.)
EOM
	;;
    esac
fi

: Looking for optional libraries
echo " "
echo "Checking for optional libraries..." >&4
case "$libs" in
' '|'') dflt='';;
*) dflt="$libs";;
esac
case "$libswanted" in
'') libswanted='c_s';;
esac
case "$usesocks" in
"$define") libswanted="$libswanted socks5 socks5_sh" ;;
esac
case "$usecbacktrace" in
"$define") libswanted="$libswanted bfd" ;;
esac
libsfound=''
libsfiles=''
libsdirs=''
libspath=''
for thisdir in $libpth $xlibpth; do
  test -d $thisdir && libspath="$libspath $thisdir"
done
for thislib in $libswanted; do
	for thisdir in $libspath; do
	    xxx=''
	    if $test ! -f "$xxx" -a "X$ignore_versioned_solibs" = "X"; then
		xxx=`ls $thisdir/lib$thislib.$so.[0-9] 2>/dev/null|sed -n '$p'`
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=shared
		xxx=`ls $thisdir/lib$thislib.[0-9].$so 2>/dev/null|sed -n '$p'`
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=shared
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/lib$thislib.$so$_a
		$test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle="import"
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/$thislib.$so$_a
		$test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle="import"
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/lib$thislib.$so
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=shared
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/lib$thislib$_a
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=static
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/$thislib$_a
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=static
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/lib${thislib}_s$_a
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=static
		$test -f "$xxx" && thislib=${thislib}_s
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/Slib$thislib$_a
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=static
	    fi
	    if $test -f "$xxx"; then
		case "$libstyle" in
		shared) echo "Found -l$thislib (shared)." ;;
		static) echo "Found -l$thislib." ;;
		*)      echo "Found -l$thislib ($libstyle)." ;;
		esac
		case " $dflt " in
		*"-l$thislib "*);;
		*) dflt="$dflt -l$thislib"
		   libsfound="$libsfound $xxx"
		   yyy=`basename $xxx`
		   libsfiles="$libsfiles $yyy"
		   yyy=`echo $xxx|$sed -e "s%/$yyy\\$%%"`
		   case " $libsdirs " in
		   *" $yyy "*) ;;
		   *) libsdirs="$libsdirs $yyy" ;;
		   esac
		   ;;
		esac
		break
	    fi
	done
	if $test ! -f "$xxx"; then
	    echo "No -l$thislib."
	fi
done
set X $dflt
shift
dflt="$*"
case "$libs" in
'') dflt="$dflt";;
*) dflt="$libs";;
esac
case "$dflt" in
' '|'') dflt='none';;
esac

$cat <<EOM

In order to compile $package on your machine, a number of libraries
are usually needed.  Include any other special libraries here as well.
Say "none" for none.  The default list is almost always right.
EOM

echo " "
rp="What libraries to use?"
. ./myread
case "$ans" in
none) libs=' ';;
*) libs="$ans";;
esac

: determine optimization, if desired, or use for debug flag also
case "$optimize" in
' '|$undef) dflt='none';;
'') dflt='-O';;
*) dflt="$optimize";;
esac
$cat <<EOH

By default, $package compiles with the -O flag to use the optimizer.
Alternately, you might want to use the symbolic debugger, which uses
the -g flag (on traditional Unix systems).  Either flag can be
specified here.  To use neither flag, specify the word "none".

EOH
rp="What optimizer/debugger flag should be used?"
. ./myread
optimize="$ans"
case "$optimize" in
'none') optimize=" ";;
esac

: Check what DEBUGGING is required from the command line
: -DEBUGGING      or -DDEBUGGING or
: -DEBUGGING=both			= -g + -DDEBUGGING
: -DEBUGGING=-g   or -Doptimize=-g	= -g
: -DEBUGGING=none or -UDEBUGGING	=
: -DEBUGGING=old  or -DEBUGGING=default	= ? $optimize
case "$EBUGGING" in
'')	;;
*)	DEBUGGING=$EBUGGING ;;
esac

case "$DEBUGGING" in
-g|both|$define)
    case "$optimize" in
	*-g*) ;;
	*)    optimize="$optimize -g" ;;
    esac ;;
none|$undef)
    case "$optimize" in
	*-g*)	set `echo "X $optimize " | sed 's/ -g / /'`
		shift
		optimize="$*"
		;;
    esac ;;
esac

dflt=''
case "$DEBUGGING" in
both|$define) dflt='-DDEBUGGING'
esac

: argument order is deliberate, as the flag will start with - which set could
: think is an option
checkccflag='check=$1; flag=$2; callback=$3;
echo " ";
echo "Checking if your compiler accepts $flag" >&4;
[ "X$sysroot" != "X" ] && echo "For sysroot = $sysroot";
echo "int main(void) { return 0; }" > gcctest.c;
if $cc $_sysroot -O2 $flag -o gcctest gcctest.c 2>gcctest.out && $run ./gcctest; then
    echo "Yes, it does." >&4;
    if $test -s gcctest.out ; then
        echo "But your platform does not like it:";
        cat gcctest.out;
    else
	case "$ccflags" in
	*$check*)
	    echo "Leaving current flags $ccflags alone." >&4
	    ;;
	*) dflt="$dflt $flag";
	    eval $callback
	    ;;
	esac
    fi
else
    echo "Nope, it does not, but that is ok." >&4;
fi
'

: We will not override a previous value, but we might want to
: augment a hint file
case "$hint" in
default|recommended)
	case "$gccversion" in
	1.*) dflt="$dflt -fpcc-struct-return" ;;
	esac
	case "$optimize:$DEBUGGING" in
	*-g*:old) dflt="$dflt -DDEBUGGING";;
	esac
	case "$gccversion" in
	2.*) if $test -d /etc/conf/kconfig.d &&
			$contains _POSIX_VERSION $usrinc/sys/unistd.h >/dev/null 2>&1
		then
			# Interactive Systems (ISC) POSIX mode.
			dflt="$dflt -posix"
		fi
		;;
	esac
	case "$gccversion" in
	1.*) ;;
	2.[0-8]*) ;;
	?*)	set strict-aliasing -fno-strict-aliasing
		eval $checkccflag
		;;
	esac
	# For gcc, adding -pipe speeds up compilations for some, but apparently
	# some assemblers can't read from stdin.  (It also slows down compilations
	# in other cases, but those are apparently rarer these days.)  AD 5/2004.
	case "$gccversion" in
	?*)	set pipe -pipe
		eval $checkccflag
		;;
	esac

	# on x86_64 (at least) we require an extra library (libssp) in the
	# link command line. This library is not named, so I infer that it is
	# an implementation detail that may change. Hence the safest approach
	# is to add the flag to the flags passed to the compiler at link time,
	# as that way the compiler can do the right implementation dependant
	# thing. (NWC)
	case "$ccflags" in
	*-fno-stack-protector*)
	    echo "Do not add -fstack-protector nor -fstack-protector-strong" 2>&1
	    ;;
	*) case "$gccversion" in
	   ?*)	set stack-protector-strong -fstack-protector-strong
		eval $checkccflag
		case "$dflt" in
		*-fstack-protector-strong*) ;; # It got added.
		*) # Try the plain/older -fstack-protector.
		   set stack-protector -fstack-protector
		   eval $checkccflag
		   ;;
		esac
		;;
	    esac
	    ;;
	esac
esac

case "$mips_type" in
*BSD*|'') inclwanted="$locincpth $usrinc";;
*) inclwanted="$locincpth $inclwanted $usrinc/bsd";;
esac
for thisincl in $inclwanted; do
	if $test -d $thisincl; then
		if $test x$thisincl != x$usrinc; then
			case "$dflt" in
			*" -I$thisincl "*);;
			*) dflt="$dflt -I$thisincl ";;
			esac
		fi
	fi
done

inctest='if $contains $2 $usrinc/$1 >/dev/null 2>&1; then
	xxx=true;
elif $contains $2 $usrinc/sys/$1 >/dev/null 2>&1; then
	xxx=true;
else
	xxx=false;
fi;
if $xxx; then
	case "$dflt" in
	*$2*);;
	*) dflt="$dflt -D$2";;
	esac;
fi'

set signal.h LANGUAGE_C; eval $inctest

case "$usesocks" in
$define)
	ccflags="$ccflags -DSOCKS"
	;;
esac

case "$hint" in
default|recommended) dflt="$ccflags $dflt" ;;
*) dflt="$ccflags";;
esac

case "$dflt" in
''|' ') dflt=none;;
esac

$cat <<EOH

Your C compiler may want other flags.  For this question you should include
-I/whatever and -DWHATEVER flags and any other flags used by the C compiler,
but you should NOT include libraries or ld flags like -lwhatever.  If you
want $package to honor its debug switch, you should include -DDEBUGGING here.
Your C compiler might also need additional flags, such as -D_POSIX_SOURCE.

To use no flags, specify the word "none".

EOH
set X $dflt
shift
dflt=${1+"$@"}
rp="Any additional cc flags?"
. ./myread
case "$ans" in
none) ccflags='';;
*) ccflags="$ans";;
esac

: the following weeds options from ccflags that are of no interest to cpp
case "$cppflags" in
'') cppflags="$ccflags" ;;
*)  set X $ccflags; shift
    case " $cppflags " in
    *" $1 "*) ;;  # Try to avoid doubling the cppflags.
    *) cppflags="$cppflags $ccflags" ;;
    esac
    ;;
esac
case "$gccversion" in
1.*) cppflags="$cppflags -D__GNUC__"
esac
case "$mips_type" in
'');;
*BSD*) cppflags="$cppflags -DSYSTYPE_BSD43";;
esac
case "$cppflags" in
'');;
*)
	echo " "
	echo "Let me guess what the preprocessor flags are..." >&4
	set X $cppflags
	shift
	cppflags=''
	$cat >cpp.c <<'EOM'
#define BLURFL foo

BLURFL xx LFRULB
EOM
	previous=''
	for flag in $*
	do
		case "$flag" in
		-*) ftry="$flag";;
		*) ftry="$previous $flag";;
		esac
		if $cppstdin -DLFRULB=bar $cppflags $ftry $cppminus <cpp.c \
			>cpp1.out 2>/dev/null && \
			$cpprun -DLFRULB=bar $cppflags $ftry $cpplast <cpp.c \
			>cpp2.out 2>/dev/null && \
			$contains 'foo.*xx.*bar' cpp1.out >/dev/null 2>&1 && \
			$contains 'foo.*xx.*bar' cpp2.out >/dev/null 2>&1
		then
			cppflags="$cppflags $ftry"
			previous=''
		else
			previous="$flag"
		fi
	done
	set X $cppflags
	shift
	cppflags=${1+"$@"}
	case "$cppflags" in
	*-*)  echo "They appear to be: $cppflags";;
	esac
	$rm -f cpp.c cpp?.out
	;;
esac

: flags used in final linking phase
case "$ldflags" in
'') if ./venix; then
		dflt='-i -z'
	else
		dflt=''
	fi
	case "$ccflags" in
	*-posix*) dflt="$dflt -posix" ;;
	esac
	;;
*) dflt="$ldflags";;
esac
# See note above about -fstack-protector
case "$ccflags" in
*-fstack-protector-strong*)
	case "$dflt" in
	*-fstack-protector-strong*) ;; # Don't add it again
	*) dflt="$dflt -fstack-protector-strong" ;;
	esac
	;;
*-fstack-protector*)
	case "$dflt" in
	*-fstack-protector*) ;; # Don't add it again
	*) dflt="$dflt -fstack-protector" ;;
	esac
	;;
esac

: Try to guess additional flags to pick up local libraries.
for thislibdir in $libpth; do
	case " $loclibpth " in
	*" $thislibdir "*)
		case "$dflt " in
		*"-L$thislibdir "*) ;;
		*)  dflt="$dflt -L$thislibdir" ;;
		esac
		;;
	esac
done

case "$dflt" in
'') dflt='none' ;;
esac

$cat <<EOH

Your C linker may need flags.  For this question you should
include -L/whatever and any other flags used by the C linker, but you
should NOT include libraries like -lwhatever.

Make sure you include the appropriate -L/path flags if your C linker
does not normally search all of the directories you specified above,
namely
	$libpth
To use no flags, specify the word "none".

EOH

rp="Any additional ld flags (NOT including libraries)?"
. ./myread
case "$ans" in
none) ldflags='';;
*) ldflags="$ans";;
esac
rmlist="$rmlist pdp11"

: coherency check
echo " "
echo "Checking your choice of C compiler and flags for coherency..." >&4
$cat > try.c <<'EOF'
#include <stdio.h>
int main() { printf("Ok\n"); return(0); }
EOF
set X $cc -o try $optimize $ccflags $ldflags try.c $libs
shift
$cat >try.msg <<'EOM'
I've tried to compile and run the following simple program:

EOM
$cat try.c >> try.msg

$cat >> try.msg <<EOM

I used the command:

	$*
	$run ./try

and I got the following output:

EOM
dflt=y
if $sh -c "$cc -o try $optimize $ccflags $ldflags try.c $libs" >>try.msg 2>&1; then
	if $sh -c "$run ./try " >>try.msg 2>&1; then
		xxx=`$run ./try`
		case "$xxx" in
		"Ok") dflt=n ;;
		*)    echo 'The program compiled OK, but produced no output.' >> try.msg ;;
		esac
	else
		echo "The program compiled OK, but exited with status $?." >>try.msg
		rp="You have a problem.  Shall I abort Configure"
		dflt=y
	fi
else
	echo "I can't compile the test program." >>try.msg
	rp="You have a BIG problem.  Shall I abort Configure"
	dflt=y
fi
case "$dflt" in
y)
	$cat try.msg >&4
	case "$knowitall" in
	'')
		echo "(The supplied flags or libraries might be incorrect.)"
		;;
	*) dflt=n;;
	esac
	echo " "
	. ./myread
	case "$ans" in
	n*|N*) ;;
	*)	echo "Ok.  Stopping Configure." >&4
		exit 1
		;;
	esac
	;;
n) echo "OK, that should do.";;
esac
$rm_try gcctest gcctest.out

: define a shorthand compile call
compile='
mc_file=$1;
shift;
case "$usedevel" in $define|true|[yY]*) if $test ! -f "${mc_file}.c"; then
echo "Internal Configure script bug - compiler test file ${mc_file}.c is missing. Please report this to https://github.com/Perl/perl5/issues" >&4;
exit 1;
fi;
esac;
$cc -o ${mc_file} $optimize $ccflags $ldflags $* ${mc_file}.c $libs > /dev/null 2>&1;'
: define a shorthand compile call for compilations that should be ok.
compile_ok='
mc_file=$1;
shift;
$cc -o ${mc_file} $optimize $ccflags $ldflags $* ${mc_file}.c $libs > /dev/null 2>&1;'

: stub, used only to satisfy other units
i_stdlib='define'

: determine filename position in cpp output
echo " "
echo "Computing filename position in cpp output for #include directives..." >&4
case "$osname" in
amigaos) fieldn=3 ;;  # Workaround for a bug in abc (pdksh).
esac
case "$fieldn" in
'')
case "$osname" in
vos) testaccess=-e ;;
*)   testaccess=-r ;;
esac
echo '#include <stdio.h>' > foo.c
$cat >fieldn <<EOF
$startsh
$cppstdin $cppflags $cppminus <foo.c 2>/dev/null | \
$grep '^[ 	]*#.*stdio\.h' | \
while read cline; do
	pos=1
	set \$cline
	while $test \$# -gt 0; do
		if $test $testaccess \`echo \$1 | $tr -d '"'\`; then
			echo "\$pos"
			exit 0
		fi
		shift
		pos=\`expr \$pos + 1\`
	done
done
EOF
chmod +x fieldn
fieldn=`./fieldn`
$rm -f foo.c fieldn
;;
esac
case $fieldn in
'') pos='???';;
1) pos=first;;
2) pos=second;;
3) pos=third;;
*) pos="${fieldn}th";;
esac
echo "Your cpp writes the filename in the $pos field of the line."

: locate header file
$cat >findhdr <<EOF
$startsh
wanted=\$1
name=''
for usrincdir in $incpth
do
	if test -f \$usrincdir/\$wanted; then
		echo "\$usrincdir/\$wanted"
		exit 0
	fi
done
awkprg='{ print \$$fieldn }'
echo "#include <\$wanted>" > foo\$\$.c
$cppstdin $cppminus $cppflags < foo\$\$.c 2>/dev/null | \
$cppfilter $grep "^[ 	]*#.*\$wanted" | \
while read cline; do
	name=\`echo \$cline | $awk "\$awkprg" | $tr -d '"'\`
	case "\$name" in
	*[/\\\\]\$wanted) echo "\$name"; exit 1;;
	*[\\\\/]\$wanted) echo "\$name"; exit 1;;
	*) exit 2;;
	esac;
done;
#
# status = 0: grep returned 0 lines, case statement not executed
# status = 1: headerfile found
# status = 2: while loop executed, no headerfile found
#
status=\$?
$rm -f foo\$\$.c;
if test \$status -eq 1; then
	exit 0;
fi
exit 1
EOF
chmod +x findhdr

: define an alternate in-header-list? function
inhdr='echo " "; td=$define; tu=$undef; yyy=$@;
cont=true; xxf="echo \"<\$1> found.\" >&4";
case $# in 2) xxnf="echo \"<\$1> NOT found.\" >&4";;
*) xxnf="echo \"<\$1> NOT found, ...\" >&4";;
esac;
case $# in 4) instead=instead;; *) instead="at last";; esac;
while $test "$cont"; do
	xxx=`./findhdr $1`
	var=$2; eval "was=\$$2";
	if $test "$xxx" && $test -r "$xxx";
	then eval $xxf;
	eval "case \"\$$var\" in $undef) . ./whoa; esac"; eval "$var=\$td";
		cont="";
	else eval $xxnf;
	eval "case \"\$$var\" in $define) . ./whoa; esac"; eval "$var=\$tu"; fi;
	set $yyy; shift; shift; yyy=$@;
	case $# in 0) cont="";;
	2) xxf="echo \"but I found <\$1> $instead.\" >&4";
		xxnf="echo \"and I did not find <\$1> either.\" >&4";;
	*) xxf="echo \"but I found <\$1\> instead.\" >&4";
		xxnf="echo \"there is no <\$1>, ...\" >&4";;
	esac;
done;
while $test "$yyy";
do set $yyy; var=$2; eval "was=\$$2";
	eval "case \"\$$var\" in $define) . ./whoa; esac"; eval "$var=\$tu";
	set $yyy; shift; shift; yyy=$@;
done'

: stdint.h should be available, but this makes sure it gets in config.h
set stdint.h i_stdint
eval $inhdr

: check for lengths of integral types
echo " "
case "$intsize" in
'')
	echo "Checking to see how big your integers are..." >&4
	$cat >try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <stdint.h>
#include <stdio.h>
int main()
{
	printf("intsize=%d;\n", (int)sizeof(int));
	printf("longsize=%d;\n", (int)sizeof(long));
	printf("shortsize=%d;\n", (int)sizeof(short));
	printf("intmaxsize=%d;\n", (int)sizeof(intmax_t));
	exit(0);
}
EOCP
	set try
	if eval $compile_ok && $run ./try > /dev/null; then
		eval `$run ./try`
		echo "Your integers are $intsize bytes long."
		echo "Your long integers are $longsize bytes long."
		echo "Your short integers are $shortsize bytes long."
		echo "Your longest integers are $intmaxsize bytes long."
	else
		$cat >&4 <<EOM
!
Help! I can't compile and run the intsize test program: please enlighten me!
(This is probably a misconfiguration in your system or libraries, and
you really ought to fix it.  Still, I'll try anyway.)
!
EOM
		dflt=4
		rp="What is the size of an integer (in bytes)?"
		. ./myread
		intsize="$ans"
		dflt=$intsize
		rp="What is the size of a long integer (in bytes)?"
		. ./myread
		longsize="$ans"
		dflt=2
		rp="What is the size of a short integer (in bytes)?"
		. ./myread
		shortsize="$ans"
		dflt=$longsize
		rp="What is the size of a intmax_t integer (in bytes)?"
		. ./myread
		intmaxsize="$ans"
	fi
	;;
esac
$rm_try

: check for long long
echo " "
echo "Checking to see if you have long long..." >&4
echo 'int main() { long long x = 7; return 0; }' > try.c
set try
if eval $compile; then
	val="$define"
	echo "You have long long."
else
	val="$undef"
	echo "You do not have long long."
fi
$rm_try
set d_longlong
eval $setvar

: check for length of long long
case "${d_longlong}${longlongsize}" in
$define)
	echo " "
	echo "Checking to see how big your long longs are..." >&4
	$cat >try.c <<'EOCP'
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof(long long));
    return(0);
}
EOCP
	set try
	if eval $compile_ok; then
		longlongsize=`$run ./try`
		echo "Your long longs are $longlongsize bytes long."
	else
		dflt='8'
		echo " "
		echo "(I can't seem to compile the test program.  Guessing...)"
		rp="What is the size of a long long (in bytes)?"
		. ./myread
		longlongsize="$ans"
	fi
	if $test "X$longsize" = "X$longlongsize"; then
		echo "(That isn't any different from an ordinary long.)"
	fi
	;;
esac
$rm_try

: see if inttypes.h is available
: we want a real compile instead of Inhdr because some systems
: have an inttypes.h which includes non-existent headers
echo " "
$cat >try.c <<EOCP
#include <inttypes.h>
int main() {
	static int32_t foo32 = 0x12345678;
}
EOCP
set try
if eval $compile; then
	echo "<inttypes.h> found." >&4
	val="$define"
else
	echo "<inttypes.h> NOT found." >&4
	val="$undef"
fi
$rm_try
set i_inttypes
eval $setvar

: check for int64_t
echo " "
echo "Checking to see if you have int64_t..." >&4
$cat >try.c <<EOCP
#include <sys/types.h>
#$i_inttypes I_INTTYPES
#ifdef I_INTTYPES
#include <inttypes.h>
#endif
int main() { int64_t x = 7; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have int64_t."
else
	val="$undef"
	echo "You do not have int64_t."
fi
$rm_try
set d_int64_t
eval $setvar

: Check if 64bit ints have a quad type
echo " "
echo "Checking which 64-bit integer type we could use..." >&4

case "$intsize" in
8) val=int
   set quadtype
   eval $setvar
   val='"unsigned int"'
   set uquadtype
   eval $setvar
   quadkind=1
   ;;
*) case "$longsize" in
   8) val=long
      set quadtype
      eval $setvar
      val='"unsigned long"'
      set uquadtype
      eval $setvar
      quadkind=2
      ;;
   *) case "$d_longlong:$longlongsize" in
      define:8)
        val='"long long"'
        set quadtype
        eval $setvar
        val='"unsigned long long"'
        set uquadtype
        eval $setvar
        quadkind=3
        ;;
      *) case "$d_int64_t" in
         define)
           val=int64_t
           set quadtype
           eval $setvar
           val=uint64_t
           set uquadtype
           eval $setvar
           quadkind=4
           ;;
         esac
         ;;
      esac
      ;;
   esac
   ;;
esac

case "$quadtype" in
'')	echo "Alas, no 64-bit integer types in sight." >&4
	d_quad="$undef"
	;;
*)	echo "We could use '$quadtype' for 64-bit integers." >&4
	d_quad="$define"
	;;
esac

: Do we want 64bit support
case "$uselonglong" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** Configure -Duselonglong is deprecated, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac
case "$use64bits" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** Configure -Duse64bits is deprecated, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac
case "$use64bitints" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** There is no Configure -Duse64bitints, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac
case "$use64bitsint" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** There is no Configure -Duse64bitsint, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac
case "$uselonglongs" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** There is no Configure -Duselonglongs, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac
case "$use64bitsall" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** There is no Configure -Duse64bitsall, using -Duse64bitall instead.
EOM
	use64bitall="$define"
	;;
esac

case "$ccflags" in
*-DUSE_LONG_LONG*|*-DUSE_64_BIT_INT*|*-DUSE_64_BIT_ALL*) use64bitint="$define";;
esac
case "$use64bitall" in
"$define"|true|[yY]*) use64bitint="$define" ;;
esac

case "$longsize" in
8) cat <<EOM

You have natively 64-bit long integers.
EOM
   val="$define"
   ;;
*) case "$use64bitint" in
   "$define"|true|[yY]*) dflt='y';;
   *) dflt='n';;
   esac
   case "$d_quad" in
   "$define") ;;
   *) dflt='n' ;;
   esac
   cat <<EOM

Perl can be built to take advantage of 64-bit integer types
on some systems.  To do so, Configure can be run with -Duse64bitint.
Choosing this option will most probably introduce binary incompatibilities.

If this doesn't make any sense to you, just accept the default '$dflt'.
(The default has been chosen based on your configuration.)
EOM
   rp='Try to use 64-bit integers, if available?'
   . ./myread
   case "$ans" in
   [yY]*) val="$define" ;;
   *)     val="$undef"  ;;
   esac
   ;;
esac
set use64bitint
eval $setvar

case "$use64bitall" in
"$define"|true|[yY]*) dflt='y' ;;
*) case "$longsize" in
   8) dflt='y' ;;
   *) dflt='n' ;;
   esac
   ;;
esac
cat <<EOM

You may also choose to try maximal 64-bitness.  It means using as much
64-bitness as possible on the platform.  This in turn means even more
binary incompatibilities.  On the other hand, your platform may not
have any more 64-bitness available than what you already have chosen.

If this doesn't make any sense to you, just accept the default '$dflt'.
(The default has been chosen based on your configuration.)
EOM
rp='Try to use maximal 64-bit support, if available?'
. ./myread
case "$ans" in
[yY]*) val="$define" ;;
*)     val="$undef"  ;;
esac
set use64bitall
eval $setvar
case "$use64bitall" in
"$define")
	case "$use64bitint" in
	"$undef")
		cat <<EOM

Since you have chosen a maximally 64-bit build, I'm also turning on
the use of 64-bit integers.
EOM
		use64bitint="$define" ;;
	esac
	;;
esac

: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that a 64-bit perl is to be built,
: we may need to set or change some other defaults.
if $test -f use64bitint.cbu; then
	echo "Your platform has some specific hints regarding 64-bit integers, using them..."
	. ./use64bitint.cbu
fi
case "$use64bitint" in
"$define"|true|[yY]*)
	: This test was common to all the OpenBSD forks, and seems harmless for
	: other platforms:
	echo " "
	echo "Checking if your C library has broken 64-bit functions..." >&4
	cat >try.c <<EOCP
#include <stdio.h>
typedef $uquadtype myULL;
int main (void)
{
    struct {
	double d;
	myULL  u;
    } *p, test[] = {
	{4294967303.15, 4294967303ULL},
	{4294967294.2,  4294967294ULL},
	{4294967295.7,  4294967295ULL},
	{0.0, 0ULL}
    };
    for (p = test; p->u; p++) {
	myULL x = (myULL)p->d;
	if (x != p->u) {
	    printf("buggy\n");
	    return 0;
	}
    }
    printf("ok\n");
    return 0;
}
EOCP
	set try
	if eval $compile_ok; then
	    libcquad=`$run ./try`
	    echo "Your C library's 64-bit functions are $libcquad."
	else
	    echo "(I can't seem to compile the test program.)"
	    echo "Assuming that your C library's 64-bit functions are ok."
	    libcquad="ok"
	fi
	$rm_try

	case "$libcquad" in
	    buggy*)
		cat >&4 <<EOM

*** You have a C library with broken 64-bit functions.
*** 64-bit support does not work reliably in this configuration.
*** Please rerun Configure without -Duse64bitint and/or -Dusemorebits.
*** Cannot continue, aborting.

EOM
		exit 1
		;;
	esac
	case "$longsize" in
	4) case "$archname64" in
	   '') archname64=64int ;;
	   esac
	   ;;
	esac
	;;
esac

: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that a maximally 64-bit perl is to be built,
: we may need to set or change some other defaults.
if $test -f use64bitall.cbu; then
	echo "Your platform has some specific hints regarding 64-bit builds, using them..."
	. ./use64bitall.cbu
fi
case "$use64bitall" in
"$define"|true|[yY]*)
	case "$longsize" in
	4) case "$archname64" in
	   ''|64int) archname64=64all ;;
	   esac
	   ;;
	esac
	;;
esac

case "$d_quad:$use64bitint" in
$undef:$define)
	cat >&4 <<EOF

*** You have chosen to use 64-bit integers,
*** but none can be found.
*** Please rerun Configure without -Duse64bitint and/or -Dusemorebits.
*** Cannot continue, aborting.

EOF
	exit 1
	;;
esac

: Check if we are using the GNU C library
echo " "
echo "Checking for GNU C Library..." >&4
cat >try.c <<'EOCP'
/* Find out version of GNU C library.  __GLIBC__ and __GLIBC_MINOR__
   alone are insufficient to distinguish different versions, such as
   2.0.6 and 2.0.7.  The function gnu_get_libc_version() appeared in
   libc version 2.1.0.      A. Dougherty,  June 3, 2002.
*/
#include <stdio.h>
int main(void)
{
#ifdef __GLIBC__
#   ifdef __GLIBC_MINOR__
#       if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1 && !defined(__cplusplus)
#           include <gnu/libc-version.h>
	    printf("%s\n",  gnu_get_libc_version());
#       else
	    printf("%d.%d\n",  __GLIBC__, __GLIBC_MINOR__);
#       endif
#   else
	printf("%d\n",  __GLIBC__);
#   endif
    return 0;
#else
    return 1;
#endif
}
EOCP
set try
if eval $compile_ok && $run ./try > glibc.ver; then
	val="$define"
	gnulibc_version=`$cat glibc.ver`
	echo "You are using the GNU C Library version $gnulibc_version"
else
	val="$undef"
	gnulibc_version=''
	echo "You are not using the GNU C Library"
fi
$rm_try glibc.ver
set d_gnulibc
eval $setvar

: see if nm is to be used to determine whether a symbol is defined or not
case "$usenm" in
'')
	dflt=''
	case "$d_gnulibc" in
	"$define")
		echo " "
		echo "nm probably won't work on the GNU C Library." >&4
		dflt=n
		;;
	esac
	case "$dflt" in
	'')
		if $test "$osname" = aix -a "X$PASE" != "Xdefine" -a ! -f /lib/syscalls.exp; then
			echo " "
			echo "Whoops!  This is an AIX system without /lib/syscalls.exp!" >&4
			echo "'nm' won't be sufficient on this system." >&4
			dflt=n
		fi
		;;
	esac
	case "$dflt" in
	'') dflt=`$egrep 'inlibc|csym' $rsrc/Configure | wc -l 2>/dev/null`
		if $test $dflt -gt 20; then
			dflt=y
		else
			dflt=n
		fi
		;;
	esac
	;;
*)
	case "$usenm" in
	true|$define) dflt=y;;
	*) dflt=n;;
	esac
	;;
esac
$cat <<EOM

I can use $nm to extract the symbols from your C libraries. This
is a time consuming task which may generate huge output on the disk (up
to 3 megabytes) but that should make the symbols extraction faster. The
alternative is to skip the 'nm' extraction part and to compile a small
test program instead to determine whether each symbol is present. If
you have a fast C compiler and/or if your 'nm' output cannot be parsed,
this may be the best solution.

You probably shouldn't let me use 'nm' if you are using the GNU C Library.

EOM
rp="Shall I use $nm to extract C symbols from the libraries?"
. ./myread
case "$ans" in
[Nn]*) usenm=false;;
*) usenm=true;;
esac

runnm=$usenm
case "$reuseval" in
true) runnm=false;;
esac

: nm options which may be necessary
case "$nm_opt" in
'') if $test -f /mach_boot; then
		nm_opt=''	# Mach
	elif $test -d /usr/ccs/lib; then
		nm_opt='-p'	# Solaris (and SunOS?)
	elif $test -f /dgux; then
		nm_opt='-p'	# DG-UX
	elif $test -f /lib64/rld; then
		nm_opt='-p'	# 64-bit Irix
	else
		nm_opt=''
	fi;;
esac

: nm options which may be necessary for shared libraries but illegal
: for archive libraries.  Thank you, Linux.
case "$nm_so_opt" in
'')	case "$myuname" in
	*linux*|gnu*)
		if $nm --help | $grep 'dynamic' > /dev/null 2>&1; then
			nm_so_opt='--dynamic'
		fi
		;;
	esac
	;;
esac

: Figure out where the libc is located
case "$runnm" in
true)
: get list of predefined functions in a handy place
echo " "
case "$libc" in
'') libc=unknown
	case "$libs" in
	*-lc_s*) libc=`./loc libc_s$_a $libc $libpth`
	esac
	;;
esac
case "$libs" in
'') ;;
*)  for thislib in $libs; do
	case "$thislib" in
	-lc|-lc_s)
		: Handle C library specially below.
		;;
	-l*)
		thislib=`echo $thislib | $sed -e 's/^-l//'`
		if try=`./loc lib$thislib.$so.'*' X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc lib$thislib.$so X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc lib$thislib$_a X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc $thislib$_a X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc lib$thislib X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc $thislib X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc Slib$thislib$_a X $xlibpth`; $test -f "$try"; then
			:
		else
			try=''
		fi
		libnames="$libnames $try"
		;;
	*) libnames="$libnames $thislib" ;;
	esac
	done
	;;
esac
xxx=normal
case "$libc" in
unknown)
	set /lib/libc.$so
	for xxx in $libpth; do
		$test -r $1 || set $xxx/libc.$so
		: The messy sed command sorts on library version numbers.
		$test -r $1 || \
			set `echo blurfl; echo $xxx/libc.$so.[0-9]* | \
			tr ' ' $trnl | egrep -v '\.[A-Za-z]*$' | $sed -e '
				h
				s/[0-9][0-9]*/0000&/g
				s/0*\([0-9][0-9][0-9][0-9][0-9]\)/\1/g
				G
				s/\n/ /' | \
			 $sort | $sed -e 's/^.* //'`
		eval set \$$#
	done
	$test -r $1 || set $sysroot/usr/ccs/lib/libc.$so
	$test -r $1 || set $sysroot/lib/libsys_s$_a
	;;
*)
	set blurfl
	;;
esac
if $test -r "$1"; then
	echo "Your (shared) C library seems to be in $1."
	libc="$1"
elif $test -r /lib/libc && $test -r /lib/clib; then
	echo "Your C library seems to be in both /lib/clib and /lib/libc."
	xxx=apollo
	libc='/lib/clib /lib/libc'
	if $test -r /lib/syslib; then
		echo "(Your math library is in /lib/syslib.)"
		libc="$libc /lib/syslib"
	fi
elif $test -r "$libc" || (test -h "$libc") >/dev/null 2>&1; then
	echo "Your C library seems to be in $libc, as you said before."
elif $test -r $incpath/usr/lib/libc$_a; then
	libc=$incpath/usr/lib/libc$_a;
	echo "Your C library seems to be in $libc.  That's fine."
elif $test -r /lib/libc$_a; then
	libc=/lib/libc$_a;
	echo "Your C library seems to be in $libc.  You're normal."
else
	if tans=`./loc libc$_a blurfl/dyick $libpth`; $test -r "$tans"; then
		:
	elif tans=`./loc libc blurfl/dyick $libpth`; $test -r "$tans"; then
		libnames="$libnames "`./loc clib blurfl/dyick $libpth`
	elif tans=`./loc clib blurfl/dyick $libpth`; $test -r "$tans"; then
		:
	elif tans=`./loc Slibc$_a blurfl/dyick $xlibpth`; $test -r "$tans"; then
		:
	elif tans=`./loc Mlibc$_a blurfl/dyick $xlibpth`; $test -r "$tans"; then
		:
	else
		tans=`./loc Llibc$_a blurfl/dyick $xlibpth`
	fi
	if $test -r "$tans"; then
		echo "Your C library seems to be in $tans, of all places."
		libc=$tans
	else
		libc='blurfl'
	fi
fi
if $test $xxx = apollo -o -r "$libc" || (test -h "$libc") >/dev/null 2>&1; then
	dflt="$libc"
	cat <<EOM

If the guess above is wrong (which it might be if you're using a strange
compiler, or your machine supports multiple models), you can override it here.

EOM
else
	dflt=''
	echo $libpth | $tr ' ' $trnl | $sort | $uniq > libpath
	cat >&4 <<EOM
I can't seem to find your C library.  I've looked in the following places:

EOM
	$sed 's/^/	/' libpath
	cat <<EOM

None of these seems to contain your C library. I need to get its name...

EOM
fi
fn=f
rp='Where is your C library?'
. ./getfile
libc="$ans"

echo " "
echo $libc $libnames | $tr ' ' $trnl | $sort | $uniq > libnames
set X `cat libnames`
shift
xxx=files
case $# in 1) xxx=file; esac
echo "Extracting names from the following $xxx for later perusal:" >&4
echo " "
$sed 's/^/	/' libnames >&4
echo " "
$echo $n "This may take a while...$c" >&4

for file in $*; do
	case $file in
	*$so*) $nm $nm_so_opt $nm_opt $file 2>/dev/null;;
	*) $nm $nm_opt $file 2>/dev/null;;
	esac
done >libc.tmp

$echo $n ".$c"
$grep fprintf libc.tmp > libc.ptf
xscan='eval "<libc.ptf $com >libc.list"; $echo $n ".$c" >&4'
xrun='eval "<libc.tmp $com >libc.list"; echo "done." >&4'
xxx='[ADTSIWi]'
if com="$sed -n -e 's/__IO//' -e 's/^.* $xxx  *//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^__*//' -e 's/^\([a-zA-Z_0-9$]*\).*xtern.*/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e '/|UNDEF/d' -e '/FUNC..GL/s/^.*|__*//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^.* D __*//p' -e 's/^.* D //p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^_//' -e 's/^\([a-zA-Z_0-9]*\).*xtern.*text.*/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^.*|FUNC |GLOB .*|//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$grep '|' | $sed -n -e '/|COMMON/d' -e '/|DATA/d' \
				-e '/ file/d' -e 's/^\([^ 	]*\).*/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^.*|FUNC |GLOB .*|//p' -e 's/^.*|FUNC |WEAK .*|//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^__//' -e '/|Undef/d' -e '/|Proc/s/ .*//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^.*|Proc .*|Text *| *//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e '/Def. Text/s/.* \([^ ]*\)\$/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^[-0-9a-f ]*_\(.*\)=.*/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/.*\.text n\ \ \ \.//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="sed -n -e 's/^__.*//' -e 's/[       ]*D[    ]*[0-9]*.*//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
else
	$nm -p $* 2>/dev/null >libc.tmp
	$grep fprintf libc.tmp > libc.ptf
	if com="$sed -n -e 's/^.* [ADTSIW]  *_[_.]*//p' -e 's/^.* [ADTSIW] //p'";\
		eval $xscan; $contains '^fprintf$' libc.list >/dev/null 2>&1
	then
		nm_opt='-p'
		eval $xrun
	else
		echo " "
		echo "$nm didn't seem to work right. Trying $ar instead..." >&4
		com=''
		if $ar t $libc > libc.tmp && \
			$contains '^fprintf$' libc.tmp >/dev/null 2>&1
		then
			for thisname in $libnames $libc; do
				$ar t $thisname >>libc.tmp
			done
			$sed -e "s/\\$_o\$//" < libc.tmp > libc.list
			echo "Ok." >&4
		elif test "X$osname" = "Xos2" && $ar tv $libc > libc.tmp; then
			for thisname in $libnames $libc; do
				$ar tv $thisname >>libc.tmp
				emximp -o tmp.imp $thisname \
				    2>/dev/null && \
				    $sed -e 's/^\([_a-zA-Z0-9]*\) .*$/\1/p' \
				    < tmp.imp >>libc.tmp
				$rm -f tmp.imp
			done
			$sed -e "s/\\$_o\$//" -e 's/^ \+//' < libc.tmp > libc.list
			echo "Ok." >&4
		else
			echo "$ar didn't seem to work right." >&4
			echo "Maybe this is a Cray...trying bld instead..." >&4
			if  bld t $libc | \
				$sed -e 's/.*\///' -e "s/\\$_o:.*\$//" > libc.list &&
				$test -s libc.list
			then
				for thisname in $libnames; do
					bld t $libnames | \
					$sed -e 's/.*\///' -e "s/\\$_o:.*\$//" >>libc.list
					$ar t $thisname >>libc.tmp
				done
				echo "Ok." >&4
			else
				echo "That didn't work either.  Giving up." >&4
				exit 1
			fi
		fi
	fi
fi
nm_extract="$com"
case "$PASE" in
define)
    echo " "
    echo "Since you are compiling for PASE, extracting more symbols from libc.a ...">&4
    dump -Tv /lib/libc.a | awk '$7 == "/unix" {print $5 " " $8}' | grep "^SV" | awk '{print $2}' >> libc.list
    ;;
*)  if $test -f /lib/syscalls.exp; then
	echo " "
	echo "Also extracting names from /lib/syscalls.exp for good ole AIX..." >&4
	$sed -n 's/^\([^ 	]*\)[ 	]*syscall[0-9]*[ 	]*$/\1/p' \
		/lib/syscalls.exp >>libc.list
    fi
    ;;
esac
;;
esac
$rm -f libnames libpath

: Check if we are using C++
echo " "
echo "Checking for C++..." >&4
$cat >try.c <<'EOCP'
#include <stdio.h>
int main(void)
{
#ifdef __cplusplus
    return 0;
#else
    return 1;
#endif
}
EOCP
set try
if eval $compile_ok && $run ./try; then
	val="$define"
	echo "You are using a C++ compiler."
else
	val="$undef"
	echo "You are not using a C++ compiler."
fi
$rm_try cplusplus$$
set d_cplusplus
eval $setvar

: is a C symbol defined?
csym='tlook=$1;
case "$3" in
-v) tf=libc.tmp; tdc="";;
-a) tf=libc.tmp; tdc="[]";;
*) tlook="^$1\$"; tf=libc.list; tdc="()";;
esac;
case "$d_cplusplus" in
    $define)	extern_C="extern \"C\""	;;
    *)		extern_C="extern"	;;
esac;
tx=yes;
case "$reuseval-$4" in
true-) ;;
true-*) tx=no; eval "tval=\$$4"; case "$tval" in "") tx=yes;; esac;;
esac;
case "$tx" in
yes)
	tval=false;
	if $test "$runnm" = true; then
		if $contains $tlook $tf >/dev/null 2>&1; then
			tval=true;
		elif $test "$mistrustnm" = compile -o "$mistrustnm" = run; then
			echo "$extern_C void *$1$tdc; void *(*(p()))$tdc { return &$1; } int main(int argc, char **argv) { if(p() && p() != (void *)argv[0]) return(0); else return(1); }"> try.c;
			$cc -o try $optimize $ccflags $ldflags try.c >/dev/null 2>&1 $libs && tval=true;
			$test "$mistrustnm" = run -a -x try && { $run ./try$_exe >/dev/null 2>&1 || tval=false; };
			$rm_try;
		fi;
	else
		echo "$extern_C void *$1$tdc; void *(*(p()))$tdc { return &$1; } int main(int argc, char **argv) { if(p() && p() != (void *)argv[0]) return(0); else return(1); }"> try.c;
		$cc -o try $optimize $ccflags $ldflags try.c $libs >/dev/null 2>&1 && tval=true;
		$rm_try;
	fi;
	;;
*)
	case "$tval" in
	$define) tval=true;;
	*) tval=false;;
	esac;
	;;
esac;
eval "$2=$tval"'

: define an is-in-libc? function
inlibc='echo " "; td=$define; tu=$undef;
sym=$1; var=$2; eval "was=\$$2";
tx=yes;
case "$reuseval$was" in
true) ;;
true*) tx=no;;
esac;
case "$tx" in
yes)
	set $sym tres -f;
	eval $csym;
	case "$tres" in
	true)
		echo "$sym() found." >&4;
		case "$was" in $undef) . ./whoa; esac; eval "$var=\$td";;
	*)
		echo "$sym() NOT found." >&4;
		case "$was" in $define) . ./whoa; esac; eval "$var=\$tu";;
	esac;;
*)
	case "$was" in
	$define) echo "$sym() found." >&4;;
	*) echo "$sym() NOT found." >&4;;
	esac;;
esac'

: check for length of double
echo " "
case "$doublesize" in
'')
	echo "Checking to see how big your double precision numbers are..." >&4
	$cat >try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof(double));
    exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		doublesize=`$run ./try`
		echo "Your double is $doublesize bytes long."
	else
		dflt='8'
		echo "(I can't seem to compile the test program.  Guessing...)"
		rp="What is the size of a double precision number (in bytes)?"
		. ./myread
		doublesize="$ans"
	fi
	;;
esac
$rm_try

: check for long doubles
echo " " >&4
echo "Checking to see if you have long double..." >&4
echo 'int main() { long double x = 7.0; }' > try.c
set try
if eval $compile; then
	val="$define"
	echo "You have long double." >&4
else
	val="$undef"
	echo "You do not have long double." >&4
fi
$rm_try
set d_longdbl
eval $setvar

: see if ldexpl exists
set ldexpl d_ldexpl
eval $inlibc

: check for length of long double
case "${d_longdbl}${longdblsize}" in
$define)
	echo " " >&4
	echo "Checking to see how big your long doubles are..." >&4
	$cat >try.c <<'EOCP'
#include <stdio.h>
int main()
{
	printf("%d\n", sizeof(long double));
}
EOCP
	set try
	set try
	if eval $compile; then
		longdblsize=`$run ./try`
		echo "Your long doubles are $longdblsize bytes long." >&4
	else
		dflt='8'
		echo " " >&4
		echo "(I can't seem to compile the test program.  Guessing...)" >&4
		rp="What is the size of a long double (in bytes)?"
		. ./myread
		longdblsize="$ans"
	fi
	if $test "X$doublesize" = "X$longdblsize"; then
		echo "That isn't any different from an ordinary double." >&4
		echo "I'll keep your setting anyway, but you may see some" >&4
		echo "harmless compilation warnings." >&4
	fi
	;;
esac
$rm_try

$echo "Checking the kind of long doubles you have..." >&4
case "$d_longdbl" in
define)
$cat <<EOP >try.c
#$i_stdlib I_STDLIB
#define LONGDBLSIZE $longdblsize
#define DOUBLESIZE $doublesize
#include <float.h>
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <stdio.h>
static const long double d = -0.1L;
int main() {
  unsigned const char* b = (unsigned const char*)(&d);
#if DOUBLESIZE == LONGDBLSIZE
  printf("0\n"); /* if it floats like double */
  exit(0);
#endif
#if (LDBL_MANT_DIG == 113 || FLT128_MANT_DIG == 113) && LONGDBLSIZE == 16
  if (b[0] == 0x9A && b[1] == 0x99 && b[15] == 0xBF) {
    /* IEEE 754 128-bit little-endian */
    printf("1\n");
    exit(0);
  }
  if (b[0] == 0xBF && b[14] == 0x99 && b[15] == 0x9A) {
    /* IEEE 128-bit big-endian, e.g. solaris sparc */
    printf("2\n");
    exit(0);
  }
#endif
/* For alignment 32-bit platforms have the 80 bits in 12 bytes,
 * while 64-bits platforms have it in 16 bytes.  The trailing bytes
 * cannot be trusted. */
#if LDBL_MANT_DIG == 64 && (LONGDBLSIZE == 16 || LONGDBLSIZE == 12)
  if (b[0] == 0xCD && b[9] == 0xBF) {
    /* x86 80-bit little-endian, sizeof 12 (ILP32, Solaris x86)
     * or 16 (LP64, Linux and OS X), 4 or 6 bytes of padding.
     * Also known as "extended precision". */
    printf("3\n");
    exit(0);
  }
  if (b[0] == 0xBF && b[9] == 0xCD) {
    /* Is there ever big-endian 80-bit, really?
     *
     * The Motorola 68881 had another "extended precision" format:
     * sign:1 exp:15 zero:16 integer:1 mantissa:63
     * for total of 96 bits of bytes.  The zero bits were unused.
     * See "M68000 FAMILY PROGRAMMER'S REFERENCE MANUAL" for more details.
     * If it ever becomes relevant, this format should be allocated a
     * new doublekind code since it is quite different from the Intel x87.
     */
    printf("4\n");
    exit(0);
  }
#endif
#if (LDBL_MANT_DIG == 106 || LDBL_MANT_DIG == 107) && LONGDBLSIZE == 16
  /* software "double double", the 106 is 53+53.
   * but irix thinks it is 107. */
  if (b[0] == 0x9A && b[7] == 0x3C && b[8] == 0x9A && b[15] == 0xBF) {
    /* double double 128-bit fully little-endian,
     * little-endian doubles in little-endian order,
     * 9a 99 99 99 99 99 59 3c 9a 99 99 99 99 99 b9 bf */
    printf("5\n");
    exit(0);
  }
  if (b[0] == 0xBF && b[7] == 0x9A && b[8] == 0x3C && b[15] == 0x9A) {
    /* double double 128-bit fully big-endian,
     * big-endian doubles in big-endian order,
     * e.g. PPC/Power and MIPS:
     * bf b9 99 99 99 99 99 9a 3c 59 99 99 99 99 99 9a */
    printf("6\n");
    exit(0);
  }
  if (b[0] == 0x9A && b[7] == 0xBF && b[8] == 0x9A && b[15] == 0x3C) {
    /* double double 128-bit mixed endian.
     * little-endian doubles in big-endian order,
     * e.g. ppc64el,
     * 9a 99 99 99 99 99 b9 bf 9a 99 99 99 99 99 59 3c */
    printf("7\n");
    exit(0);
  }
  if (b[0] == 0x3C && b[7] == 0x9A && b[8] == 0xBF && b[15] == 0x9A) {
    /* double double 128-bit mixed endian,
     * big-endian doubles in little-endian order,
     * 3c 59 99 99 99 99 99 9a bf b9 99 99 99 99 99 9a */
    printf("8\n");
    exit(0);
  }
#endif
/* We are largely making this up because it may well be
 * that the VAX format H was never made available to C,
 * only to Fortran. */
#if LONGDBLSIZE == 16 && defined(__vax__)
  if (b[0] == 0xFD && b[15] == 0x99) {
    /* VAX format H, PDP-11 mixed endian. */
    printf("9\n");
    exit(0);
  }
#endif
  printf("-1\n"); /* unknown */
  exit(0);
}
EOP
set try
if eval $compile; then
    longdblkind=`$run ./try`
else
    longdblkind=-1
fi
;;
*) longdblkind=0 ;;
esac
case "$longdblkind" in
0) echo "Your long doubles are doubles." >&4 ;;
1) echo "You have IEEE 754 128-bit little endian long doubles." >&4 ;;
2) echo "You have IEEE 754 128-bit big endian long doubles." >&4 ;;
3) echo "You have x86 80-bit little endian long doubles." >&4 ;;
4) echo "You have x86 80-bit big endian long doubles." >&4 ;;
5) echo "You have 128-bit fully little-endian double-double long doubles (64-bit LEs in LE)." >&4 ;;
6) echo "You have 128-bit fully big-endian double-double long doubles (64-bit BEs in BE)." >&4 ;;
7) echo "You have 128-bit mixed-endian double-double long doubles (64-bit LEs in BE)." >&4 ;;
8) echo "You have 128-bit mixed-endian double-double long doubles (64-bit BEs in LE)." >&4 ;;
9) echo "You have 128-bit PDP-style mixed-endian long doubles (VAX format H)." >&4 ;;
*) echo "Cannot figure out your long double." >&4 ;;
esac
d_long_double_style_ieee=$undef
d_long_double_style_ieee_std=$undef
d_long_double_style_ieee_extended=$undef
d_long_double_style_ieee_doubledouble=$undef
d_long_double_style_vax=$undef
case "$longdblkind" in
1|2|3|4|5|6|7|8) d_long_double_style_ieee=$define ;;
esac
case "$longdblkind" in
1|2) d_long_double_style_ieee_std=$define ;;
esac
case "$longdblkind" in
3|4) d_long_double_style_ieee_extended=$define ;;
esac
case "$longdblkind" in
5|6|7|8) d_long_double_style_ieee_doubledouble=$define ;;
esac
case "$longdblkind" in
9) d_long_double_style_vax=$define ;;
esac
$rm_try

: get the patchlevel
echo " "
echo "Getting the current patchlevel..." >&4
if $test -r $rsrc/patchlevel.h;then
	revision=`awk '/define[ 	]+PERL_REVISION/ {print $3}' $rsrc/patchlevel.h`
	patchlevel=`awk '/define[ 	]+PERL_VERSION/ {print $3}' $rsrc/patchlevel.h`
	subversion=`awk '/define[ 	]+PERL_SUBVERSION/ {print $3}' $rsrc/patchlevel.h`
	api_revision=`awk '/define[ 	]+PERL_API_REVISION/ {print $3}' $rsrc/patchlevel.h`
	api_version=`awk '/define[ 	]+PERL_API_VERSION/ {print $3}' $rsrc/patchlevel.h`
	api_subversion=`awk '/define[ 	]+PERL_API_SUBVERSION/ {print $3}' $rsrc/patchlevel.h`
	perl_patchlevel=`egrep ',"(MAINT|SMOKE)[0-9][0-9]*"' $rsrc/patchlevel.h|tail -1|sed 's/[^0-9]//g'`
else
	revision=0
	patchlevel=0
	subversion=0
	api_revision=0
	api_version=0
	api_subversion=0
	perl_patchlevel=0
	$echo "(You do not have patchlevel.h.  Eek.)"
fi
: Define a handy string here to avoid duplication in myconfig.SH and configpm.
version_patchlevel_string="version $patchlevel subversion $subversion"
case "$perl_patchlevel" in
0|'') ;;
*)  perl_patchlevel=`echo $perl_patchlevel | sed 's/.* //'`
    version_patchlevel_string="$version_patchlevel_string patch $perl_patchlevel"
    ;;
esac

$echo "(You have $package $version_patchlevel_string.)"

case "$osname" in
dos|vms)
	: XXX Should be a Configure test for double-dots in filenames.
	version=`echo $revision $patchlevel $subversion | \
		 $awk '{ printf "%d_%d_%d", $1, $2, $3 }'`
	api_versionstring=`echo $api_revision $api_version $api_subversion | \
		 $awk '{ printf "%d_%d_%d", $1, $2, $3 }'`
	;;
*)
	version=`echo $revision $patchlevel $subversion | \
		 $awk '{ printf "%d.%d.%d", $1, $2, $3 }'`
	api_versionstring=`echo $api_revision $api_version $api_subversion | \
		 $awk '{ printf "%d.%d.%d", $1, $2, $3 }'`
	;;
esac
: Special case the 5.005_xx maintenance series, which used 5.005
: without any subversion label as a subdirectory in $sitelib
if test "${api_revision}${api_version}${api_subversion}" = "550"; then
	api_versionstring='5.005'
fi

: Check if quadmath is requested
case "$usequadmath" in
"$define"|true|[yY]*) usequadmath="$define" ;;
*)                    usequadmath="$undef"  ;;
esac

: Fail if both uselongdouble and usequadmath are requested
case "$usequadmath:$uselongdouble" in
define:define)
	$cat <<EOM >&4

*** You requested the use of the quadmath library and use
*** of long doubles.
***
*** Please select one or the other.
EOM
	exit 1
	;;
esac

: determine the architecture name
echo " "
if xxx=`./loc arch blurfl $pth`; $test -f "$xxx"; then
	tarch=`arch`"-$osname"
elif xxx=`./loc uname blurfl $pth`; $test -f "$xxx" ; then
	if uname -m > tmparch 2>&1 ; then
		tarch=`$sed -e 's/ *$//' -e 's/ /_/g' \
			-e 's/$/'"-$osname/" tmparch`
	else
		tarch="$osname"
	fi
	$rm -f tmparch
else
	tarch="$osname"
fi
case "$myarchname" in
''|"$tarch") ;;
*)
	echo "(Your architecture name used to be $myarchname.)"
	archname=''
	;;
esac
case "$targetarch" in
'') ;;
*)  archname=`echo $targetarch|sed 's,^[^-]*-,,'` ;;
esac
myarchname="$tarch"
case "$archname" in
'') dflt="$tarch";;
*) dflt="$archname";;
esac
rp='What is your architecture name'
. ./myread
archname="$ans"

: optionally add API version to the architecture for versioned archlibs
case "$useversionedarchname" in
$define|true|[yY]*) dflt='y';;
*)                  dflt='n';;
esac
rp='Add the Perl API version to your archname?'
. ./myread
case "$ans" in
y|Y)	useversionedarchname="$define" ;;
*)      useversionedarchname="$undef" ;;
esac
case "$useversionedarchname" in
$define)
	case "$archname" in
	*-$api_versionstring)
		echo "...and architecture name already has -$api_versionstring" >&4
		;;
	*)
		archname="$archname-$api_versionstring"
		echo "...setting architecture name to $archname." >&4
		;;
	esac
	;;
esac

case "$usethreads" in
$define)
	echo "Threads selected." >&4
	case "$archname" in
	*-thread*) echo "...and architecture name already has -thread." >&4
		;;
	*)      archname="$archname-thread"
		echo "...setting architecture name to $archname." >&4
		;;
	esac
	;;
esac
case "$usemultiplicity" in
$define)
	echo "Multiplicity selected." >&4
	case "$archname" in
	*-multi*) echo "...and architecture name already has -multi." >&4
		;;
	*)      archname="$archname-multi"
		echo "...setting architecture name to $archname." >&4
		;;
	esac
	;;
esac
case "$use64bitint$use64bitall" in
*"$define"*)
	case "$archname64" in
	'')
		echo "This architecture is naturally 64-bit, not changing architecture name." >&4
		;;
	*)
		case "$use64bitint" in
		"$define") echo "64 bit integers selected." >&4 ;;
		esac
		case "$use64bitall" in
		"$define") echo "Maximal 64 bitness selected." >&4 ;;
		esac
		case "$archname" in
		*-$archname64*) echo "...and architecture name already has $archname64." >&4
			;;
		*)      archname="$archname-$archname64"
			echo "...setting architecture name to $archname." >&4
			;;
		esac
		;;
	esac
esac
case "$uselongdouble" in
$define)
	echo "Long doubles selected." >&4
	case "$longdblsize" in
	$doublesize)
		echo "...but long doubles are equal to doubles, not changing architecture name." >&4
		;;
	*)
		case "$archname" in
		*-ld*) echo "...and architecture name already has -ld." >&4
			;;
		*)      archname="$archname-ld"
			echo "...setting architecture name to $archname." >&4
			;;
		esac
		;;
	esac
	;;
esac
case "$usequadmath" in
$define)
	echo "quadmath selected." >&4
	case "$archname" in
	*-quadmath*) echo "...and architecture name already has -quadmath." >&4
		;;
	*)      archname="$archname-quadmath"
		echo "...setting architecture name to $archname." >&4
		;;
	esac
	;;
esac
if $test -f archname.cbu; then
	echo "Your platform has some specific hints for architecture name, using them..."
	. ./archname.cbu
fi

: set the prefixit variable, to compute a suitable default value
prefixit='case "$3" in
""|none)
	case "$oldprefix" in
	"") eval "$1=\"\$$2\"";;
	*)
		case "$3" in
		"") eval "$1=";;
		none)
			eval "tp=\"\$$2\"";
			case "$tp" in
			""|" "|none) eval "$1=\"\$$2\"";;
			*) eval "$1=";;
			esac;;
		esac;;
	esac;;
*)
	eval "tp=\"$oldprefix-\$$2-\""; eval "tp=\"$tp\"";
	case "$tp" in
	--|/*--|\~*--) eval "$1=\"$prefix/$3\"";;
	/*-$oldprefix/*|\~*-$oldprefix/*)
		eval "$1=\`echo \$$2 | sed \"s,^$oldprefix,$prefix,\"\`";;
	*) eval "$1=\"\$$2\"";;
	esac;;
esac'

: determine installation style
: For now, try to deduce it from prefix unless it is already set.
: Reproduce behavior of 5.005 and earlier, maybe drop that in 5.7.
case "$installstyle" in
'')	case "$prefix" in
		*perl*) dflt='lib';;
		*) dflt='lib/perl5' ;;
	esac
	;;
*)	dflt="$installstyle" ;;
esac
: Probably not worth prompting for this since we prompt for all
: the directories individually, and the prompt would be too long and
: confusing anyway.
installstyle=$dflt

: determine where public executables go
echo " "
set dflt bin bin
eval $prefixit
fn=d~
rp='Pathname where the public executables will reside?'
. ./getfile
if $test "X$ansexp" != "X$binexp"; then
	installbin=''
fi
prefixvar=bin
: XXX Bug? -- ignores Configure -Dinstallprefix setting.
: XXX If this is fixed, also fix the "start perl" hunk below, which relies on
:     this via initialinstalllocation
. ./setprefixvar

case "$userelocatableinc" in
$define|true|[yY]*)	dflt='y' ;;
*)			dflt='n' ;;
esac
cat <<EOM

Would you like to build Perl so that the installation is relocatable, so that
library paths in @INC are determined relative to the path of the perl binary?
This is not advised for system Perl installs, or if you need to run setid
scripts or scripts under taint mode.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Use relocatable @INC?'
. ./myread
case "$ans" in
y|Y)	val="$define" ;;
*)	val="$undef"  ;;
esac
set userelocatableinc
eval $setvar

initialinstalllocation="$binexp"
: Default prefix is now "up one level from where the binaries are"
case "$userelocatableinc" in
$define|true|[yY]*)
    bin=".../"
    binexp=".../"
    prefix=".../.."
    prefixexp=".../.."
    installprefixexp=".../.."
    ;;
esac

: determine where private library files go
: Usual default is /usr/local/lib/perl5/$version.
: Also allow things like /opt/perl/lib/$version, since
: /opt/perl/lib/perl5... would be redundant.
: The default "style" setting is made in installstyle.U
case "$installstyle" in
*lib/perl5*) set dflt privlib lib/$package/$version ;;
*)	 set dflt privlib lib/$version ;;
esac
eval $prefixit
$cat <<EOM

There are some auxiliary files for $package that need to be put into a
private library directory that is accessible by everyone.

EOM
fn=$binexp
fn=d~+
rp='Pathname where the private library files will reside?'
. ./getfile
prefixvar=privlib
. ./setprefixvar

: set the prefixup variable, to restore leading tilda escape
prefixup='case "$prefixexp" in
"$prefix") ;;
*) eval "$1=\`echo \$$1 | sed \"s,^$prefixexp,$prefix,\"\`";;
esac'

: determine where public architecture dependent libraries go
set archlib archlib
eval $prefixit
: privlib default is /usr/local/lib/$package/$version
: archlib default is /usr/local/lib/$package/$version/$archname
: privlib may have an optional trailing /share.
tdflt=`echo $privlib | $sed 's,/share$,,'`
tdflt=$tdflt/$archname
case "$archlib" in
'')	dflt=$tdflt
	;;
*)	dflt="$archlib"
    ;;
esac
$cat <<EOM

$spackage contains architecture-dependent library files.  If you are
sharing libraries in a heterogeneous environment, you might store
these files in a separate location.  Otherwise, you can just include
them with the rest of the public library files.

EOM
fn=$binexp
fn=d+~
rp='Where do you want to put the public architecture-dependent libraries?'
. ./getfile
prefixvar=archlib
. ./setprefixvar
if $test X"$archlib" = X"$privlib"; then
	d_archlib="$undef"
else
	d_archlib="$define"
fi

: see if setuid scripts can be secure
$cat <<EOM

Some kernels have a bug that prevents setuid #! scripts from being
secure.  Some sites have disabled setuid #! scripts because of this.

First let's decide if your kernel supports secure setuid #! scripts.
(If setuid #! scripts would be secure but have been disabled anyway,
don't say that they are secure if asked.)

EOM

val="$undef"
if $test -d /dev/fd; then
	echo "#!$ls" >reflect
	chmod +x,u+s reflect
	./reflect >flect 2>&1
	if $contains "/dev/fd" flect >/dev/null; then
		echo "Congratulations, your kernel has secure setuid scripts!" >&4
		val="$define"
	else
		$cat <<EOM
If you are not sure if they are secure, I can check but I'll need a
username and password different from the one you are using right now.
If you don't have such a username or don't want me to test, simply
enter 'none'.

EOM
		rp='Other username to test security of setuid scripts with?'
		dflt='none'
		. ./myread
		case "$ans" in
		n|none)
			case "$d_suidsafe" in
			'')	echo "I'll assume setuid scripts are *not* secure." >&4
				dflt=n;;
			"$undef")
				echo "Well, the $hint value is *not* secure." >&4
				dflt=n;;
			*)	echo "Well, the $hint value *is* secure." >&4
				dflt=y;;
			esac
			;;
		*)
			$rm -f reflect flect
			echo "#!$ls" >reflect
			chmod +x,u+s reflect
			echo >flect
			chmod a+w flect
			echo '"su" will (probably) prompt you for '"$ans's password."
			su $ans -c './reflect >flect'
			if $contains "/dev/fd" flect >/dev/null; then
				echo "Okay, it looks like setuid scripts are secure." >&4
				dflt=y
			else
				echo "I don't think setuid scripts are secure." >&4
				dflt=n
			fi
			;;
		esac
		rp='Does your kernel have *secure* setuid scripts?'
		. ./myread
		case "$ans" in
		[yY]*)	val="$define";;
		*)	val="$undef";;
		esac
	fi
else
	echo "I don't think setuid scripts are secure (no /dev/fd directory)." >&4
	echo "(That's for file descriptors, not floppy disks.)"
	val="$undef"
fi
set d_suidsafe
eval $setvar

$rm -f reflect flect

: now see if they want to do setuid emulation
if $test $patchlevel -lt 11; then
echo " "
val="$undef"
case "$d_suidsafe" in
"$define")
	val="$undef"
	echo "No need to emulate SUID scripts since they are secure here." >&4
	;;
*)
	$cat <<EOM
Some systems have disabled setuid scripts, especially systems where
setuid scripts cannot be secure.  On systems where setuid scripts have
been disabled, the setuid/setgid bits on scripts are currently
useless.  It is possible for $package to detect those bits and emulate
setuid/setgid in a secure fashion.  This emulation will only work if
setuid scripts have been disabled in your kernel.

EOM
	case "$d_dosuid" in
	"$define") dflt=y ;;
	*) dflt=n ;;
	esac
	rp="Do you want to do setuid/setgid emulation?"
	. ./myread
	case "$ans" in
	[yY]*)	val="$define";;
	*)	val="$undef";;
	esac
	;;
esac
set d_dosuid
eval $setvar
else
    case "$d_dosuid" in
	"$define")
	cat >&4 <<EOH

SUID emulation has been removed for 5.12
Please re-run Configure without -Dd_dosuid

EOH
	exit 1;
	;;
    esac
    d_dosuid=undef
fi

: Find perl5.005 or later.
echo "Looking for a previously installed perl5.005 or later... "
case "$perl5" in
'')	for tdir in `echo "$binexp$path_sep$PATH" | $sed "s/$path_sep/ /g"`; do
		: Check if this perl is recent and can load a simple module
		if $test -x $tdir/perl$exe_ext && $tdir/perl -Mless -e 'use 5.005;' >/dev/null 2>&1; then
			perl5=$tdir/perl
			break;
		elif $test -x $tdir/perl5$exe_ext && $tdir/perl5 -Mless -e 'use 5.005;' >/dev/null 2>&1; then
			perl5=$tdir/perl5
			break;
		fi
	done
	;;
*)	perl5="$perl5"
	;;
esac
case "$perl5" in
'')	echo "None found.  That's ok.";;
*)	echo "Using $perl5." ;;
esac

: Set the siteprefix variables
$cat <<EOM

After $package is installed, you may wish to install various
add-on modules and utilities.  Typically, these add-ons will
be installed under $prefix with the rest
of this package.  However, you may wish to install such add-ons
elsewhere under a different prefix.

If you do not wish to put everything under a single prefix, that's
ok.  You will be prompted for the individual locations; this siteprefix
is only used to suggest the defaults.

The default should be fine for most people.

EOM
fn=d~+
rp='Installation prefix to use for add-on modules and utilities?'
: XXX Here might be another good place for an installstyle setting.
case "$siteprefix" in
'') dflt=$prefix ;;
*)  dflt=$siteprefix ;;
esac
. ./getfile
: XXX Prefixit unit does not yet support siteprefix and vendorprefix
oldsiteprefix=''
case "$siteprefix" in
'') ;;
*)	case "$ans" in
	"$prefix") ;;
	*) oldsiteprefix="$prefix";;
	esac
	;;
esac
siteprefix="$ans"
siteprefixexp="$ansexp"

: determine where site specific libraries go.
: Usual default is /usr/local/lib/perl5/site_perl/$version
: The default "style" setting is made in installstyle.U
: XXX No longer works with Prefixit stuff.
prog=`echo $package | $sed 's/-*[0-9.]*$//'`
case "$sitelib" in
'') case "$installstyle" in
	*lib/perl5*) dflt=$siteprefix/lib/$package/site_$prog/$version ;;
	*)	 dflt=$siteprefix/lib/site_$prog/$version ;;
	esac
	;;
*)	dflt="$sitelib"
	;;
esac
$cat <<EOM

The installation process will create a directory for
site-specific extensions and modules.  Most users find it convenient
to place all site-specific files in this directory rather than in the
main distribution directory.

EOM
fn=d~+
rp='Pathname for the site-specific library files?'
. ./getfile
prefixvar=sitelib
. ./setprefixvar
sitelib_stem=`echo "$sitelibexp" | sed "s,/$version$,,"`

: Determine list of previous versions to include in @INC
$cat > getverlist <<EOPL
#!$perl5
use strict;
use warnings;
use File::Basename;
my \$api_versionstring = "$api_versionstring";
my \$version = "$version";
my \$stem = "$sitelib_stem";
my \$archname = "$archname";
EOPL
	$cat >> getverlist <<'EOPL'
# The list found is stored twice for each entry: the original name, and
# the binary broken down version into pack "s>s>s>", so sorting is easy
# and unambiguous.  This will work for all versions that have a maximum
# of three digit per group separate by '.'s or '_'s. Names are extended
# with ".0.0" to ensure at least three elements for the pack.
#                                   -- H.Merijn Brand (m)'06 23-10-2006
# pack "s>" was introduced in perl-5.10, so I had to rewrite this to an
# sprintf approach to support bases systems with 5.6.x and 5.8.x
#                                   -- H.Merijn Brand (m)'25 16-05-2025

my @inc_version_list;
my @candidates;
# XXX Redo to do opendir/readdir?
if (-d $stem) {
    chdir($stem);
    ;@candidates = map {
	[ $_, sprintf "%04d%04d%04d", (split m/[._]/, "$_.0.0")[0,1,2] ] } glob("5.*");
    ;@candidates = sort { $a->[1] cmp $b->[1]} @candidates;
}
else {
    ;@candidates = ();
}

my ($pversion, $aversion, $vsn5005) = map {
    sprintf "%04d%04d%04d", (split m/[._]/, "$_.0.0")[0,1,2] } $version, $api_versionstring, "5.005";
foreach my $d (@candidates) {
    if ($d->[1] lt $pversion) {
	if ($d->[1] ge $aversion) {
	    unshift(@inc_version_list, grep { -d } $d->[0]."/$archname", $d->[0]);
	}
	elsif ($d->[1] ge $vsn5005) {
	    unshift(@inc_version_list, grep { -d } $d->[0]);
	}
    }
    else {
	# Skip newer version.  I.e. don't look in
	# 5.7.0 if we're installing 5.6.1.
    }
}

if (@inc_version_list) {
    print join(' ', @inc_version_list);
}
else {
    # Blank space to preserve value for next Configure run.
    print " ";
}
EOPL
chmod +x getverlist
case "$inc_version_list" in
'')	if test -x "$perl5$exe_ext"; then
		dflt=`$perl5 getverlist`
	else
		dflt='none'
	fi
	;;
$undef) dflt='none' ;;
*)  eval dflt=\"$inc_version_list\" ;;
esac
case "$dflt" in
''|' ') dflt=none ;;
esac
case "$dflt" in
5.005) dflt=none ;;
esac
$cat <<EOM

In order to ease the process of upgrading, this version of perl
can be configured to use modules built and installed with earlier
versions of perl that were installed under $prefix.  Specify here
the list of earlier versions that this version of perl should check.
If Configure detected no earlier versions of perl installed under
$prefix, then the list will be empty.  Answer 'none' to tell perl
to not search earlier versions.

The default should almost always be sensible, so if you're not sure,
just accept the default.
EOM

rp='List of earlier versions to include in @INC?'
. ./myread
case "$ans" in
[Nn]one|''|' '|$undef) inc_version_list=' ' ;;
*) inc_version_list="$ans" ;;
esac
case "$inc_version_list" in
''|' ')
	inc_version_list_init='0'
	d_inc_version_list="$undef"
	;;
*)	inc_version_list_init=`echo $inc_version_list |
		$sed -e 's/^/"/' -e 's/ /","/g' -e 's/$/",0/'`
	d_inc_version_list="$define"
	;;
esac
$rm -f getverlist

: check for length of pointer
echo " "
case "$ptrsize" in
'')
	echo "Checking to see how big your pointers are..." >&4
	$cat >try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main()
{
    printf("%d\n", (int)sizeof(void *));
    exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		ptrsize=`$run ./try`
		echo "Your pointers are $ptrsize bytes long."
	else
		dflt='4'
		echo "(I can't seem to compile the test program.  Guessing...)" >&4
		rp="What is the size of a pointer (in bytes)?"
		. ./myread
		ptrsize="$ans"
	fi
	;;
esac
$rm_try
case "$use64bitall" in
"$define"|true|[yY]*)
	case "$ptrsize" in
	4)	cat <<EOM >&4

*** You have chosen a maximally 64-bit build,
*** but your pointers are only 4 bytes wide.
*** Please rerun Configure without -Duse64bitall.
EOM
		case "$d_quad" in
		define)
			cat <<EOM >&4
*** Since you have quads, you could possibly try with -Duse64bitint.
EOM
			;;
		esac
		cat <<EOM >&4
*** Cannot continue, aborting.

EOM

		exit 1
		;;
	esac
	;;
esac

: determine whether to use malloc wrapping
echo " "
case "$usemallocwrap" in
[yY]*|true|$define)	dflt='y' ;;
[nN]*|false|$undef)	dflt='n' ;;
*)	case "$usedevel" in
	[yY]*|true|$define)	dflt='y' ;;
	*) dflt='n' ;;
	esac
	;;
esac
rp="Do you wish to wrap malloc calls to protect against potential overflows?"
. ./myread
usemallocwrap="$ans"
case "$ans" in
y*|true)
	usemallocwrap="$define" ;;
*)
	usemallocwrap="$undef" ;;
esac

: determine which malloc to compile in
echo " "
case "$usemymalloc" in
[yY]*|true|$define)	dflt='y' ;;
[nN]*|false|$undef)	dflt='n' ;;
*)	case "$ptrsize" in
	4) dflt='y' ;;
	*) dflt='n' ;;
	esac
	if test "$useithreads" = "$define"; then dflt='n'; fi
	;;
esac
rp="Do you wish to attempt to use the malloc that comes with $package?"
. ./myread
usemymalloc="$ans"
case "$ans" in
y*|true)
	usemymalloc='y'
	mallocsrc='malloc.c'
	mallocobj="malloc$_o"
	d_mymalloc="$define"
	case "$libs" in
	*-lmalloc*)
		: Remove malloc from list of libraries to use
		echo "Removing unneeded -lmalloc from library list" >&4
		set `echo X $libs | $sed -e 's/-lmalloc / /' -e 's/-lmalloc$//'`
		shift
		libs="$*"
		echo "libs = $libs" >&4
		;;
	esac
	;;
*)
	usemymalloc='n'
	mallocsrc=''
	mallocobj=''
	d_mymalloc="$undef"
	;;
esac

: compute the return types of malloc and free
echo " "
case "$malloctype" in
'')
	malloctype='void *'
	;;
esac
echo "Your system wants malloc to return '$malloctype', it would seem." >&4

case "$freetype" in
'')
	freetype='void'
	;;
esac
echo "Your system uses $freetype free(), it would seem." >&4

: determine where site specific architecture-dependent libraries go.
: sitelib  default is /usr/local/lib/perl5/site_perl/$version
: sitearch default is /usr/local/lib/perl5/site_perl/$version/$archname
: sitelib may have an optional trailing /share.
case "$sitearch" in
'')	dflt=`echo $sitelib | $sed 's,/share$,,'`
	dflt="$dflt/$archname"
	;;
*)	dflt="$sitearch"
	;;
esac
set sitearch sitearch none
eval $prefixit
$cat <<EOM

The installation process will also create a directory for
architecture-dependent site-specific extensions and modules.

EOM
fn=d~+
rp='Pathname for the site-specific architecture-dependent library files?'
. ./getfile
prefixvar=sitearch
. ./setprefixvar
if $test X"$sitearch" = X"$sitelib"; then
	d_sitearch="$undef"
else
	d_sitearch="$define"
fi

: Set the vendorprefix variables
$cat <<EOM

The installation process will also create a directory for
vendor-supplied add-ons.  Vendors who supply perl with their system
may find it convenient to place all vendor-supplied files in this
directory rather than in the main distribution directory.  This will
ease upgrades between binary-compatible maintenance versions of perl.

Of course you may also use these directories in whatever way you see
fit.  For example, you might use them to access modules shared over a
company-wide network.

The default answer should be fine for most people.
This causes further questions about vendor add-ons to be skipped
and no vendor-specific directories will be configured for perl.

EOM
rp='Do you want to configure vendor-specific add-on directories?'
case "$usevendorprefix" in
define|true|[yY]*) dflt=y ;;
*)	: User may have set vendorprefix directly on Configure command line.
	case "$vendorprefix" in
	''|' ') dflt=n ;;
	*)	dflt=y ;;
	esac
	;;
esac
. ./myread
case "$ans" in
[yY]*)	fn=d~+
	rp='Installation prefix to use for vendor-supplied add-ons?'
	case "$vendorprefix" in
	'') dflt="$prefix" ;;
	*)  dflt=$vendorprefix ;;
	esac
	. ./getfile
	: XXX Prefixit unit does not yet support siteprefix and vendorprefix
	oldvendorprefix=''
	case "$vendorprefix" in
	'') ;;
	*)	case "$ans" in
		"$prefix") ;;
		*) oldvendorprefix="$prefix";;
		esac
		;;
	esac
	usevendorprefix="$define"
	vendorprefix="$ans"
	vendorprefixexp="$ansexp"
	;;
*)	usevendorprefix="$undef"
	vendorprefix=''
	vendorprefixexp=''
	;;
esac

: Set the vendorlib variables
case "$vendorprefix" in
'')	d_vendorlib="$undef"
	vendorlib=''
	vendorlibexp=''
	;;
*)	d_vendorlib="$define"
	: determine where vendor-supplied modules go.
	: Usual default is /usr/local/lib/perl5/vendor_perl/$version
	case "$vendorlib" in
	'')
		prog=`echo $package | $sed 's/-*[0-9.]*$//'`
		case "$installstyle" in
		*lib/perl5*) dflt=$vendorprefix/lib/$package/vendor_$prog/$version ;;
		*)	     dflt=$vendorprefix/lib/vendor_$prog/$version ;;
		esac
		;;
	*)	dflt="$vendorlib"
		;;
	esac
	fn=d~+
	rp='Pathname for the vendor-supplied library files?'
	. ./getfile
	vendorlib="$ans"
	vendorlibexp="$ansexp"
	;;
esac
vendorlib_stem=`echo "$vendorlibexp" | sed "s,/$version$,,"`
prefixvar=vendorlib
. ./installprefix

: Set the vendorarch variables
case "$vendorprefix" in
'')	d_vendorarch="$undef"
	vendorarch=''
	vendorarchexp=''
	;;
*)	d_vendorarch="$define"
	: determine where vendor-supplied architecture-dependent libraries go.
	: vendorlib  default is /usr/local/lib/perl5/vendor_perl/$version
	: vendorarch default is /usr/local/lib/perl5/vendor_perl/$version/$archname
	: vendorlib may have an optional trailing /share.
	case "$vendorarch" in
	'')	dflt=`echo $vendorlib | $sed 's,/share$,,'`
		dflt="$dflt/$archname"
		;;
	*)	dflt="$vendorarch" ;;
	esac
	fn=d~+
	rp='Pathname for vendor-supplied architecture-dependent files?'
	. ./getfile
	vendorarch="$ans"
	vendorarchexp="$ansexp"
	;;
esac
prefixvar=vendorarch
. ./installprefix
if $test X"$vendorarch" = X"$vendorlib"; then
	d_vendorarch="$undef"
else
	d_vendorarch="$define"
fi

: Final catch-all directories to search
$cat <<EOM

Lastly, you can have perl look in other directories for extensions and
modules in addition to those already specified.
These directories will be searched after
	$sitearch
	$sitelib
EOM
test X"$vendorlib" != "X" && echo '	' $vendorlib
test X"$vendorarch" != "X" && echo '	' $vendorarch
echo ' '
case "$otherlibdirs" in
''|' ') dflt='none' ;;
*)	dflt="$otherlibdirs" ;;
esac
$cat <<EOM
Enter a colon-separated set of extra paths to include in perl's @INC
search path, or enter 'none' for no extra paths.

EOM

rp='Colon-separated list of additional directories for perl to search?'
. ./myread
case "$ans" in
' '|''|none)	otherlibdirs=' ' ;;
*)	otherlibdirs="$ans" ;;
esac
case "$otherlibdirs" in
' ') val=$undef ;;
*)	val=$define ;;
esac
set d_perl_otherlibdirs
eval $setvar

: DTrace support
dflt_dtrace='/usr/sbin/dtrace'
$test -x /usr/bin/dtrace && dflt_dtrace='/usr/bin/dtrace'

cat <<EOM

Perl can be built to support DTrace on platforms that support it.
DTrace is a diagnosis and performance analysis tool from Sun.

If this doesn't make any sense to you, just accept the default.
EOM

while $test 1 ; do
	case "$usedtrace" in
	$define|true|[yY]*)
		dflt='y'
		;;
	$undef|false|[nN]*)
		dflt='n'
		dflt_dtrace=""
		;;
	?*)
		dflt='y'
		dflt_dtrace=$usedtrace
		;;
	*)
		dflt='n'
		;;
	esac

	rp='Support DTrace if available?'
	. ./myread
	case "$ans" in
	y|Y)	val="$define" ;;
	*)      val="$undef" ;;
	esac
	set usedtrace
	eval $setvar

	test "X$usedtrace" != "X$define" && break

	echo " "
	rp='Where is the dtrace executable?'
	dflt=$dflt_dtrace
	. ./getfile
	val="$ans"
	set dtrace
	eval $setvar

	if $test -f $dtrace
	then
		if $dtrace -h -s ../perldtrace.d \
			-o perldtrace.tmp >/dev/null 2>&1 \
			&& rm -f perldtrace.tmp
		then
			echo " "
			echo "Good: your $dtrace knows about the -h flag."
		else
			cat >&2 <<EOM

*** $me:  Fatal Error:  $dtrace doesn't support -h flag
***
*** Your installed dtrace doesn't support the -h switch to compile a D
*** program into a C header. Can't continue.

EOM
			exit 1
		fi
		break;
	fi

	case "$fastread" in
	yes)
		cat >&2 <<EOM

*** $me:  Fatal Error:  $dtrace not found.
*** Can't continue.

EOM
		exit 1
		;;
	*)
		echo "*** $dtrace was not found."
		echo " "
		;;
	esac
done

: See if we want extra modules installed
echo " "
case "$extras" in
'') dflt='n';;
*) dflt='y';;
esac
cat <<EOM
Perl can be built with extra modules or bundles of modules which
will be fetched from the CPAN and installed alongside Perl.

Notice that you will need access to the CPAN; either via the Internet,
or a local copy, for example a CD-ROM or a local CPAN mirror.  (You will
be asked later to configure the CPAN.pm module which will in turn do
the installation of the rest of the extra modules or bundles.)

Notice also that if the modules require any external software such as
libraries and headers (the libz library and the zlib.h header for the
Compress::Zlib module, for example) you MUST have any such software
already installed, this configuration process will NOT install such
things for you.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Install any extra modules (y or n)?'
. ./myread
case "$ans" in
y|Y)
	cat <<EOM

Please list any extra modules or bundles to be installed from CPAN,
with spaces between the names.  The names can be in any format the
'install' command of CPAN.pm will understand.  (Answer 'none',
without the quotes, to install no extra modules or bundles.)
EOM
	rp='Extras?'
	dflt="$extras"
	. ./myread
	extras="$ans"
esac
case "$extras" in
''|'none')
	val=''
	$rm -f ../extras.lst
	;;
*)	echo "(Saving the list of extras for later...)"
	echo "$extras" > ../extras.lst
	val="'$extras'"
	;;
esac
set extras
eval $setvar
echo " "

: determine where html pages for programs go
set html1dir html1dir none
eval $prefixit
$cat <<EOM

If you wish to install html files for programs in $spackage, indicate
the appropriate directory here.  To skip installing html files,
answer "none".
EOM
case "$html1dir" in
''|none|$undef|' ') dflt=none ;;
*) dflt=$html1dir ;;
esac
fn=dn+~
rp="Directory for the main $spackage html pages?"
. ./getfile
prefixvar=html1dir
. ./setprefixvar
: Use ' ' for none so value is preserved next time through Configure
$test X"$html1dir" = "X" && html1dir=' '

: determine where html pages for libraries and modules go
set html3dir html3dir none
eval $prefixit
$cat <<EOM

If you wish to install html files for modules associated with $spackage,
indicate the appropriate directory here.  To skip installing html files,
answer "none".
EOM
: There is no obvious default.  If they have specified html1dir, then
: try to key off that, possibly changing .../html1 into .../html3.
case "$html3dir" in
'') html3dir=`echo "$html1dir" | $sed 's/1$/3$/'` ;;
*) dflt=$html3dir ;;
esac
fn=dn+~
rp="Directory for the $spackage module html pages?"
. ./getfile
prefixvar=html3dir
. ./setprefixvar
: Use ' ' for none so value is preserved next time through Configure
$test X"$html3dir" = "X" && html3dir=' '

: determine whether to install perl also as /usr/bin/perl

echo " "
if $test -d /usr/bin -a "X$installbin" != X/usr/bin; then
	$cat <<EOM
Many scripts expect perl to be installed as /usr/bin/perl.

If you want to, I can install the perl you are about to compile
as /usr/bin/perl (in addition to $bin/perl).
EOM
	if test -f /usr/bin/perl; then
	    $cat <<EOM

However, please note that because you already have a /usr/bin/perl,
overwriting that with a new Perl would very probably cause problems.
Therefore I'm assuming you don't want to do that (unless you insist).

EOM
	    case "$installusrbinperl" in
	    "$define"|[yY]*)	dflt='y';;
	    *)			dflt='n';;
	    esac
	else
	    $cat <<EOM

Since you don't have a /usr/bin/perl I'm assuming creating one is okay.

EOM
	    case "$installusrbinperl" in
	    "$undef"|[nN]*)	dflt='n';;
	    *)			dflt='y';;
	    esac
	fi
	rp="Do you want to install perl as /usr/bin/perl?"
	. ./myread
	case "$ans" in
	[yY]*)	val="$define";;
	*)	val="$undef" ;;
	esac
else
	val="$undef"
fi
set installusrbinperl
eval $setvar

: see if dlopen exists
xxx_runnm="$runnm"
xxx_ccflags="$ccflags"
runnm=false
: with g++ one needs -shared to get is-in-libc to work for dlopen
case "$gccversion" in
'')	;;
*Clang*)	;;
*)	case "$d_cplusplus" in
	"$define") ccflags="$ccflags -shared" ;;
	esac
	;;
esac
set dlopen d_dlopen
eval $inlibc
runnm="$xxx_runnm"
ccflags="$xxx_ccflags"

: see if this is a unistd.h system
set unistd.h i_unistd
eval $inhdr

: determine which dynamic loading, if any, to compile in
echo " "
dldir="ext/DynaLoader"
case "$usedl" in
    $define|y|true)
	dflt='y'
	usedl="$define"
	;;
    $undef|n|false)
	dflt='n'
	usedl="$undef"
	;;
    *)
	dflt='n'
	case "$d_dlopen" in
	    $define) dflt='y' ;;
	esac
	: Does a dl_xxx.xs file exist for this operating system
	$test -f $rsrc/$dldir/dl_${osname}.xs && dflt='y'
	;;
esac
rp="Do you wish to use dynamic loading?"
. ./myread
usedl="$ans"
bin_ELF="$undef"
case "$ans" in
    y*) usedl="$define"
	case "$dlsrc" in
	    '') if $test -f $rsrc/$dldir/dl_${osname}.xs ; then
		    dflt="$dldir/dl_${osname}.xs"
		elif $test "$d_dlopen" = "$define" ; then
		    dflt="$dldir/dl_dlopen.xs"
		else
		    dflt=''
		fi
		;;
	    *)  dflt="$dldir/$dlsrc"
		;;
	esac
	echo "The following dynamic loading files are available:"
	: Can not go over to $dldir because getfile has path hard-coded in.
	tdir=`pwd`; cd "$rsrc"; $ls -C $dldir/dl*.xs; cd "$tdir"
	rp="Source file to use for dynamic loading"
	fn="fne"
	gfpth="$src"
	. ./getfile
	usedl="$define"
	: emulate basename
	dlsrc=`echo $ans | $sed -e 's%.*/\([^/]*\)$%\1%'`

	$cat << EOM

Some systems may require passing special flags to $cc -c to
compile modules that will be used to create a shared library.
To use no flags, say "none".

EOM
	case "$cccdlflags" in
	    '') case "$gccversion" in
		'') case "$osname" in
			hpux)	dflt='+z' ;;
			irix*)	dflt='-KPIC' ;;
			svr4*|esix*|solaris|nonstopux) dflt='-KPIC' ;;
			sunos)	dflt='-pic' ;;
			*)	dflt='none' ;;
		    esac
		    ;;
		*)  case "$osname" in
			darwin) dflt='none' ;;
			*linux*|svr4*|esix*|solaris|nonstopux) dflt='-fPIC' ;;
			*)	dflt='-fpic' ;;
		    esac ;;
		esac ;;
	    ' ') dflt='none' ;;
	    *)   dflt="$cccdlflags" ;;
	esac

	case "$dflt" in
	    none) dflt='' ;;
	esac

	# If -Dsysroot was specified, now's the time to add it
	# to cccdlflags
	if test "X$sysroot" != X; then
	    case "$gccversion" in
		'') ;;
		*)  case "$dflt" in
			*sysroot*) ;;
			'undef'|*)
			    dflt="$dflt --sysroot=$sysroot" ;;
		    esac
		    ;;
	    esac
	fi

	case "$dflt" in
	    '') dflt='none';;
	esac

	rp="Any special flags to pass to $cc -c to compile shared library modules?"
	. ./myread
	case "$ans" in
	    none) cccdlflags=' ' ;;
	    *)    cccdlflags="$ans" ;;
	esac

	cat << EOM

Some systems use ld to create libraries that can be dynamically loaded,
while other systems (such as those using ELF) use $cc.

EOM

: Determine if this is ELF
	$cat >try.c <<EOM
/* Test for whether ELF binaries are produced */
#include <fcntl.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_unistd I_UNISTD
#ifdef I_UNISTD
#include <unistd.h>
#endif
int main() {
    char b[4];
    int i = open("a.out",O_RDONLY);
    if(i == -1)
	exit(1); /* fail */
    if(read(i,b,4)==4 && b[0]==127 && b[1]=='E' && b[2]=='L' && b[3]=='F')
	exit(0); /* succeed (yes, it is ELF) */
    exit(1); /* fail */
}
EOM
	if $cc $ccflags $ldflags -o a.out try.c >/dev/null 2>&1 && $run ./a.out; then
	    bin_ELF="$define"
	fi
	$rm_try

	case "$ld" in
	    '') if $test $bin_ELF = "$define"; then
		    cat <<EOM
You appear to have ELF support.  I'll use $cc to build dynamic libraries.
EOM
		    dflt="$cc"
		else
		    echo "I'll use ld to build dynamic libraries."
		    dflt='ld'
		fi
		;;
	    *)  dflt="$ld"
		;;
	esac

	rp="What command should be used to create dynamic libraries?"
	. ./myread
	ld="$ans"

	cat << EOM

Some systems may require passing special flags to $ld to create a
library that can be dynamically loaded.  If your ld flags include
-L/other/path options to locate libraries outside your loader's normal
search path, you may need to specify those -L options here as well.  To
use no flags, say "none".

EOM
	case "$lddlflags" in
	    '') case "$osname" in
		    haiku) dflt='-shared' ;;
		    hpux) dflt='-b';
			  case "$gccversion" in
			      '') dflt="$dflt +vnocompatwarnings" ;;
			  esac
			  ;;
		    *linux*|irix*|gnu*)  dflt="-shared $optimize" ;;
		    solaris) # See [perl #66604].
			    # On Solaris 11, gcc -m64 on amd64
			    # appears not to understand -G.  gcc versions at
			    # least as old as 3.4.3 support -shared, so just
			    # use that with Solaris 11 and later, but keep
			    # the old behavior for older Solaris versions.
			    case "$gccversion" in
				'') dflt='-G' ;;
				*)  case "$osvers" in
					2.?|2.10) dflt='-G' ;;
					*) dflt='-shared' ;;
				    esac
				    ;;
			    esac
			    ;;
		    sunos) dflt='-assert nodefinitions' ;;
		    svr4*|esix*|nonstopux) dflt="-G $ldflags" ;;
		    *)     dflt='none' ;;
		esac
		;;
	    *) dflt="$lddlflags" ;;
	esac

	: Only do this for gcc, since, for example, qcc has no concept
	: of --sysroot.
	if $test "X$sysroot" != X; then
	    case "$gccversion" in
		'') ;;
		*)  dflt="$dflt --sysroot=$sysroot" ;;
	    esac
	fi

	: Try to guess additional flags to pick up local libraries.
	: Be careful not to append to a plain 'none'
	case "$dflt" in
	    none) dflt='' ;;
	esac
	for thisflag in $ldflags; do
	    case "$thisflag" in
		-L*|-R*|-Wl,-R*)
		    case " $dflt " in
			*" $thisflag "*) ;;
			*) dflt="$dflt $thisflag" ;;
		    esac
		    ;;
	    esac
	done

	case "$dflt" in
	    ''|' ') dflt='none' ;;
	esac

	case "$ldflags" in
	    *-fstack-protector-strong*)
		case "$dflt" in
		    *-fstack-protector-strong*) ;; # Don't add it again
		    *) dflt="$dflt -fstack-protector-strong" ;;
		esac
		;;
	    *-fstack-protector*)
		case "$dflt" in
		    *-fstack-protector*) ;; # Don't add it again
		    *) dflt="$dflt -fstack-protector" ;;
		esac
		;;
	esac

	rp="Any special flags to pass to $ld to create a dynamically loaded library?"
	. ./myread
	case "$ans" in
	    none) lddlflags=' ' ;;
	    *) lddlflags="$ans" ;;
	esac

	cat <<EOM

Some systems may require passing special flags to $cc to indicate that
the resulting executable will use dynamic linking.  To use no flags,
say "none".

EOM
	case "$ccdlflags" in
	    '') case "$osname" in
		    *linux*|hpux|gnu*) dflt='-Wl,-E' ;;
		    sunos)             dflt='none'   ;;
		    *)                 dflt='none'   ;;
		esac ;;
	    ' ') dflt='none' ;;
	    *)   dflt="$ccdlflags" ;;
	esac
	rp="Any special flags to pass to $cc to use dynamic linking?"
	. ./myread
	case "$ans" in
	    none) ccdlflags=' ' ;;
	    *)    ccdlflags="$ans" ;;
	esac
	;;

    *)  usedl="$undef"
	ld='ld'
	dlsrc='dl_none.xs'
	lddlflags=''
	ccdlflags=''
	;;
esac

ld_can_script="$undef"
case "$bin_ELF$usedl" in
    $define$define)
	# Abuse try.h and a.out names for neat cleanup
	$cat >try.c <<EOM
void foo() {}
void bar() {}
EOM
	$cat >try.h <<EOM
LIBTEST_42 {
 global:
  foo;
 local: *;
 };
EOM
	if $cc $cccdlflags $ccdlflags $ccflags \
	       $ldflags $lddlflags -o a.out try.c \
	       -Wl,--version-script=try.h >/dev/null 2>&1 \
	   &&  $test -s a.out ; then
	    echo "ld supports scripting" >&4
	    ld_can_script="$define"
	else
	    echo "ld does not support scripting" >&4
	fi
	$rm_try
	;;
esac

: Do we want a shared libperl?
also=''
case "$usedl" in
$undef)
	# No dynamic loading being used, so don't bother even to prompt.
	useshrplib='false'
	;;
*)	case "$useshrplib" in
	'')	case "$osname" in
		svr4*|nonstopux|dgux|dynixptx|esix|powerux|haiku|cygwin*)
			dflt=y
			also='Building a shared libperl is required for dynamic loading to work on your system.'
			;;
		*)	dflt=n
			;;
		esac
		;;
	$define|true|[Yy]*)
		dflt=y
		;;
	*)	dflt=n
		;;
	esac
	$cat << EOM

The perl executable is normally obtained by linking perlmain.c with
libperl${_a}, any static extensions (usually just DynaLoader), and
any other libraries needed on this system (such as -lm, etc.).  Since
your system supports dynamic loading, it is probably possible to build
a shared libperl.$so.  If you will have more than one executable linked
to libperl.$so, this will significantly reduce the size of each
executable, but it may have a noticeable effect on performance.  The
default is probably sensible for your system.
$also

EOM
	rp="Build a shared libperl.$so (y/n)"
	. ./myread
	case "$ans" in
	true|$define|[Yy]*)
		useshrplib='true'  ;;
	*)	useshrplib='false' ;;
	esac
	;;
esac

case "$useshrplib" in
true)
	case "$userelocatableinc" in
	true|define)
		echo "Cannot build with both -Duserelocatableinc and -Duseshrplib" >&4
		echo "See INSTALL for an explanation why that won't work." >&4
		exit 4
		;;
	esac
	case "$libperl" in
	'')
		# Figure out a good name for libperl.so.  Since it gets stored in
		# a version-specific architecture-dependent library, the version
		# number isn't really that important, except for making cc/ld happy.
		#
		# A name such as libperl.so.10.1
		majmin="libperl.$so.$patchlevel.$subversion"
		# A name such as libperl.so.100
		majonly=`echo $patchlevel $subversion |
			$awk '{printf "%d%02d", $1, $2}'`
		majonly=libperl.$so.$majonly
		# I'd prefer to keep the os-specific stuff here to a minimum, and
		# rely on figuring it out from the naming of libc.
		case "${osname}${osvers}" in
		*linux*|gnu*)  # ld won't link with a bare -lperl otherwise.
			dflt=libperl.$so
			;;
		cygwin*) # ld links now against the dll directly
			majmin="cygperl5_${patchlevel}_${subversion}.${so}"
			majonly=`echo $patchlevel $subversion |
				$awk '{printf "%03d%03d", $1, $2}'`
			majonly=cygperl5.$majonly.$so
			dflt=$majmin
			;;
		*)	# Try to guess based on whether libc has major.minor.
			case "$libc" in
			*libc.$so.[0-9]*.[0-9]*) dflt=$majmin ;;
			*libc.$so.[0-9]*) dflt=$majonly ;;
			*)	dflt=libperl.$so ;;
			esac
			;;
		esac
		;;
	*)	dflt=$libperl
		;;
	esac
	cat << EOM

I need to select a good name for the shared libperl.  If your system uses
library names with major and minor numbers, then you might want something
like $majmin.  Alternatively, if your system uses a single version
number for shared libraries, then you might want to use $majonly.
Or, your system might be quite happy with a simple libperl.$so.

Since the shared libperl will get installed into a version-specific
architecture-dependent directory, the version number of the shared perl
library probably isn't important, so the default should be o.k.

EOM
	rp='What name do you want to give to the shared libperl?'
	. ./myread
	libperl=$ans
	echo "Ok, I'll use $libperl"
	;;
*)
	libperl="libperl${_a}"
	;;
esac

# Detect old use of shrpdir via undocumented Configure -Dshrpdir
case "$shrpdir" in
'') ;;
*)	$cat >&4 <<EOM
WARNING:  Use of the shrpdir variable for the installation location of
the shared $libperl is not supported.  It was never documented and
will not work in this version.  Let me (https://github.com/Perl/perl5/issues)
know of any problems this may cause.

EOM
	case "$shrpdir" in
	"$archlibexp/CORE")
		$cat >&4 <<EOM
But your current setting of $shrpdir is
the default anyway, so it's harmless.
EOM
		;;
	*)
		$cat >&4 <<EOM
Further, your current attempted setting of $shrpdir
conflicts with the value of $archlibexp/CORE
that installperl will use.
EOM
		;;
	esac
	;;
esac

# How will the perl executable find the installed shared $libperl?
# Add $xxx to ccdlflags.
# If we can't figure out a command-line option, use $shrpenv to
# set env LD_RUN_PATH.  The main perl makefile uses this.
shrpdir=$archlibexp/CORE
xxx=''
tmp_shrpenv=''
if "$useshrplib"; then
    case "$osname" in
	aix)
		# We'll set it in Makefile.SH...
		;;
	solaris)
		xxx="-R $shrpdir"
		;;
	freebsd|minix|mirbsd|netbsd|openbsd|interix|dragonfly|bitrig)
		xxx="-Wl,-R$shrpdir"
		;;
	bsdos|linux|irix*|dec_osf|gnu*|haiku)
		xxx="-Wl,-rpath,$shrpdir"
		;;
	hpux*)
		# hpux doesn't like the default, either.
		tmp_shrpenv="env LDOPTS=\"+s +b${shrpdir}\""
		;;
	cygwin)
		# cygwin needs only ldlibpth
		;;
	*)
		tmp_shrpenv="env LD_RUN_PATH=$shrpdir"
		;;
	esac
	case "$xxx" in
	'') ;;
	*)
		# Only add $xxx if it isn't already in ccdlflags.
		case " $ccdlflags " in
		*" $xxx "*)	;;
		*)	ccdlflags="$ccdlflags $xxx"
			cat <<EOM >&4

Adding $xxx to the flags
passed to $ld so that the perl executable will find the
installed shared $libperl.

EOM
			;;
		esac
		;;
	esac
fi
# Fix ccdlflags in AIX for building external extensions.
# (For building Perl itself bare -bE:perl.exp is needed,
#  Makefile.SH takes care of this.)
case "$osname" in
aix) ccdlflags="$ccdlflags -bE:$installarchlib/CORE/perl.exp" ;;
esac
# Respect a hint or command-line value.
case "$shrpenv" in
'') shrpenv="$tmp_shrpenv" ;;
esac
case "$ldlibpthname" in
'')	ldlibpthname=LD_LIBRARY_PATH ;;
none)	ldlibpthname='' ;;
esac

: determine where manual pages are on this system
echo " "
case "$sysman" in
'')
	syspath='/usr/share/man/man1 /usr/man/man1'
	syspath="$syspath /usr/man/mann /usr/man/manl /usr/man/local/man1"
	syspath="$syspath /usr/man/u_man/man1"
	syspath="$syspath /usr/catman/u_man/man1 /usr/man/l_man/man1"
	syspath="$syspath /usr/local/man/u_man/man1 /usr/local/man/l_man/man1"
	syspath="$syspath /usr/man/man.L /local/man/man1 /usr/local/man/man1"
	sysman=`./loc . /usr/man/man1 $syspath`
	;;
esac
if $test -d "$sysman"; then
	echo "System manual is in $sysman." >&4
else
	echo "Could not find manual pages in source form." >&4
fi

: determine where manual pages go
set man1dir man1dir none
eval $prefixit
$cat <<EOM

$spackage has manual pages available in source form.
EOM
case "$nroff" in
nroff)
	echo "However, you don't have nroff, so they're probably useless to you."
	case "$man1dir" in
	'') man1dir="none";;
	esac;;
esac
echo "If you don't want the manual sources installed, answer 'none'."
case "$man1dir" in
' ') dflt=none
	;;
'')
	lookpath="$prefixexp/share/man/man1"
	lookpath="$lookpath $prefixexp/man/man1 $prefixexp/man/l_man/man1"
	lookpath="$lookpath $prefixexp/man/p_man/man1"
	lookpath="$lookpath $prefixexp/man/u_man/man1"
	lookpath="$lookpath $prefixexp/man/man.1"
	case "$sysman" in
	*/?_man*)	dflt=`./loc . $prefixexp/l_man/man1 $lookpath` ;;
	*)	dflt=`./loc . $prefixexp/man/man1 $lookpath` ;;
	esac
	set dflt
	eval $prefixup
	;;
*)  dflt="$man1dir"
	;;
esac
echo " "
fn=dn+~
rp="Where do the main $spackage manual pages (source) go?"
. ./getfile
if $test "X$man1direxp" != "X$ansexp"; then
	installman1dir=''
fi
prefixvar=man1dir
. ./setprefixvar

case "$man1dir" in
'')	man1dir=' '
	installman1dir='';;
esac

: What suffix to use on installed man pages

case "$man1dir" in
' ')
	man1ext='0'
	;;
*)
	rp="What suffix should be used for the main $spackage man pages?"
	case "$man1ext" in
	'')	case "$man1dir" in
		*1)  dflt=1 ;;
		*1p) dflt=1p ;;
		*1pm) dflt=1pm ;;
		*l) dflt=l;;
		*n) dflt=n;;
		*o) dflt=o;;
		*p) dflt=p;;
		*C) dflt=C;;
		*L) dflt=L;;
		*L1) dflt=L1;;
		*) dflt=1;;
		esac
		;;
	*)	dflt="$man1ext";;
	esac
	. ./myread
	man1ext="$ans"
	;;
esac

: see if we can have long filenames
echo " "
first=123456789abcdef
$rm -f $first
if (echo hi >$first) 2>/dev/null; then
	if $test -f 123456789abcde; then
		echo 'You cannot have filenames longer than 14 characters.  Sigh.' >&4
		val="$undef"
	else
		echo 'You can have filenames longer than 14 characters.'>&4
		val="$define"
	fi
else
	$cat <<'EOM'
You can't have filenames longer than 14 chars.
You can't even think about them!
EOM
	val="$undef"
fi
set d_flexfnam
eval $setvar
$rm -rf 123456789abcde*

: determine where library module manual pages go
set man3dir man3dir none
eval $prefixit
$cat <<EOM

$spackage has manual pages for many of the library modules.
EOM

case "$nroff" in
nroff)
	$cat <<'EOM'
However, you don't have nroff, so they're probably useless to you.
EOM
	case "$man3dir" in
	'') man3dir="none";;
	esac;;
esac

case "$d_flexfnam" in
undef)
	$cat <<'EOM'
However, your system can't handle the long file names like File::Basename.3.
EOM
	case "$man3dir" in
	'') man3dir="none";;
	esac;;
esac

echo "If you don't want the manual sources installed, answer 'none'."
prog=`echo $package | $sed 's/-*[0-9.]*$//'`
case "$man3dir" in
'')	dflt=`echo "$man1dir" | $sed -e 's/man1/man3/g' -e 's/man\.1/man\.3/g'`
	if $test -d "$privlib/man/man3"; then
		cat <<EOM >&4

WARNING:  Previous versions of perl installed man3 pages into
$privlib/man/man3.  This version will suggest a
new default of $dflt.
EOM
		tdflt=$dflt
		dflt='n'
		rp='Do you wish to preserve the old behavior?(y/n)'
		. ./myread
		case "$ans" in
		y*) dflt="$privlib/man/man3" ;;
		*)  dflt=$tdflt ;;
		esac
    fi
	;;
*)	dflt="$man3dir" ;;
esac
case "$dflt" in
' ') dflt=none ;;
esac
echo " "
fn=dn+~
rp="Where do the $package library man pages (source) go?"
. ./getfile
prefixvar=man3dir
. ./setprefixvar

case "$man3dir" in
'')	man3dir=' '
	installman3dir='';;
esac

: What suffix to use on installed man pages
case "$man3dir" in
' ')
	man3ext='0'
	;;
*)
	rp="What suffix should be used for the $package library man pages?"
	case "$man3ext" in
	'')	case "$man3dir" in
		*3)  dflt=3 ;;
		*3p) dflt=3p ;;
		*3pm) dflt=3pm ;;
		*l) dflt=l;;
		*n) dflt=n;;
		*o) dflt=o;;
		*p) dflt=p;;
		*C) dflt=C;;
		*L) dflt=L;;
		*L3) dflt=L3;;
		*) dflt=3;;
		esac
		;;
	*)	dflt="$man3ext";;
	esac
	. ./myread
	man3ext="$ans"
	;;
esac

: see if we have to deal with yellow pages, now NIS.
if $test -d /usr/etc/yp || $test -d /etc/yp || $test -d /usr/lib/yp; then
	case "$hostcat" in
	nidump*) ;;
	*)
		case "$hostcat" in
		*ypcat*) dflt=y;;
		'') if $contains '^\+' /etc/passwd >/dev/null 2>&1; then
				dflt=y
			else
				dflt=n
			fi;;
		*) dflt=n;;
		esac
		echo " "
		rp='Are you getting the hosts file via yellow pages?'
		. ./myread
		case "$ans" in
		y*) hostcat='ypcat hosts';;
		*) hostcat='cat /etc/hosts';;
		esac
		;;
	esac
fi
case "$hostcat" in
'') test -f /etc/hosts && hostcat='cat /etc/hosts';;
esac
case "$groupcat" in
'') test -f /etc/group && groupcat='cat /etc/group';;
esac
case "$passcat" in
'') test -f /etc/passwd && passcat='cat /etc/passwd';;
esac

: now get the host name
echo " "
echo "Figuring out host name..." >&4
case "$myhostname" in
'') cont=true
	echo 'Maybe "hostname" will work...'
	if tans=`sh -c hostname 2>&1` ; then
		myhostname=$tans
		phostname=hostname
		cont=''
	fi
	;;
*) cont='';;
esac
if $test "$cont"; then
	if ./xenix; then
		echo 'Oh, dear.  Maybe "/etc/systemid" is the key...'
		if tans=`cat /etc/systemid 2>&1` ; then
			myhostname=$tans
			phostname='cat /etc/systemid'
			echo "Whadyaknow.  Xenix always was a bit strange..."
			cont=''
		fi
	elif $test -r /etc/systemid; then
		echo "(What is a non-Xenix system doing with /etc/systemid?)"
	fi
fi
if $test "$cont"; then
	echo 'No, maybe "uuname -l" will work...'
	if tans=`sh -c 'uuname -l' 2>&1` ; then
		myhostname=$tans
		phostname='uuname -l'
	else
		echo 'Strange.  Maybe "uname -n" will work...'
		if tans=`sh -c 'uname -n' 2>&1` ; then
			myhostname=$tans
			phostname='uname -n'
		else
			echo 'Oh well, maybe I can mine it out of whoami.h...'
			if tans=`sh -c $contains' sysname $usrinc/whoami.h' 2>&1` ; then
				myhostname=`echo "$tans" | $sed 's/^.*"\(.*\)"/\1/'`
				phostname="sed -n -e '"'/sysname/s/^.*\"\\(.*\\)\"/\1/{'"' -e p -e q -e '}' <$usrinc/whoami.h"
			else
				case "$myhostname" in
				'') echo "Does this machine have an identity crisis or something?"
					phostname='';;
				*)
					echo "Well, you said $myhostname before..."
					phostname='echo $myhostname';;
				esac
			fi
		fi
	fi
fi
case "$myhostname" in
'') myhostname=noname ;;
esac
: you do not want to know about this
set $myhostname
myhostname=$1

: verify guess
if $test "$myhostname" ; then
	dflt=y
	rp='Your host name appears to be "'$myhostname'".'" Right?"
	. ./myread
	case "$ans" in
	y*) ;;
	*) myhostname='';;
	esac
fi

: bad guess or no guess
while $test "X$myhostname" = X ; do
	dflt=''
	rp="Please type the (one word) name of your host:"
	. ./myread
	myhostname="$ans"
done

: translate upper to lower if necessary
case "$myhostname" in
*[A-Z]*)
	echo "(Normalizing case in your host name)"
	myhostname=`echo $myhostname | ./tr '[A-Z]' '[a-z]'`
	;;
esac

case "$myhostname" in
*.*)
	dflt=`expr "X$myhostname" : "X[^.]*\(\..*\)"`
	myhostname=`expr "X$myhostname" : "X\([^.]*\)\."`
	echo "(Trimming domain name from host name--host name is now $myhostname)"
	;;
*) case "$mydomain" in
	'')
		{
			test "X$hostcat" = "Xypcat hosts" &&
			ypmatch "$myhostname" hosts 2>/dev/null |\
				$sed -e 's/[	 ]*#.*//; s/$/ /' > hosts && \
			$test -s hosts
		} || {
			test "X$hostcat" != "X" &&
			$hostcat | $sed -n -e "s/[	 ]*#.*//; s/\$/ /
					/[	 ]$myhostname[	. ]/p" > hosts
		}
		tmp_re="[	. ]"
		if $test -f hosts; then
			$test x`$awk "/[0-9].*[	 ]$myhostname$tmp_re/ { sum++ }
			     END { print sum }" hosts` = x1 || tmp_re="[	 ]"
			dflt=.`$awk "/[0-9].*[	 ]$myhostname$tmp_re/ {for(i=2; i<=NF;i++) print \\\$i}" \
				hosts | $sort | $uniq | \
				$sed -n -e "s/$myhostname\.\([-a-zA-Z0-9_.]\)/\1/p"`
			case `$echo X$dflt` in
			X*\ *)	echo "(Several hosts in the database matched hostname)"
				dflt=.
				;;
			X.) echo "(You do not have fully-qualified names in the hosts database)"
				;;
			esac
		else
			echo "(I cannot locate a hosts database anywhere)"
			dflt=.
		fi
		case "$dflt" in
		.)
			tans=`./loc resolv.conf X /etc /usr/etc`
			if $test -f "$tans"; then
				echo "(Attempting domain name extraction from $tans)"
				dflt=.`$sed -n -e 's/	/ /g' \
				  -e 's/^search  *\([^ ]*\).*/\1/p' $tans \
				  -e 1q 2>/dev/null`
				case "$dflt" in
				.) dflt=.`$sed -n -e 's/	/ /g' \
				     -e 's/^domain  *\([^ ]*\).*/\1/p' $tans \
				     -e 1q 2>/dev/null`
					;;
				esac
			fi
			;;
		esac
		case "$dflt" in
		.) echo "(No help from resolv.conf either -- attempting clever guess)"
			dflt=.`sh -c domainname 2>/dev/null`
			case "$dflt" in
			'') dflt='.';;
			.nis.*|.yp.*|.main.*) dflt=`echo $dflt | $sed -e 's/^\.[^.]*//'`;;
			esac
			;;
		esac
		case "$dflt$osname" in
		.os390) echo "(Attempting domain name extraction from //'SYS1.TCPPARMS(TCPDATA)')"
			dflt=.`awk '/^DOMAINORIGIN/ {print $2}' "//'SYS1.TCPPARMS(TCPDATA)'" 2>/dev/null`
			;;
		esac
		case "$dflt" in
		.) echo "(Lost all hope -- silly guess then)"
			dflt='.nonet'
			;;
		esac
		$rm -f hosts
		;;
	*) dflt="$mydomain";;
	esac;;
esac
echo " "
rp="What is your domain name?"
. ./myread
tans="$ans"
case "$ans" in
'') ;;
.*) ;;
*) tans=".$tans";;
esac
mydomain="$tans"

: translate upper to lower if necessary
case "$mydomain" in
*[A-Z]*)
	echo "(Normalizing case in your domain name)"
	mydomain=`echo $mydomain | ./tr '[A-Z]' '[a-z]'`
	;;
esac

: a little sanity check here
case "$phostname" in
'') ;;
*)
	case `$phostname | ./tr '[A-Z]' '[a-z]'` in
	$myhostname$mydomain|$myhostname) ;;
	*)
		case "$phostname" in
		sed*)
			echo "(That doesn't agree with your whoami.h file, by the way.)"
			;;
		*)
			echo "(That doesn't agree with your $phostname command, by the way.)"
			;;
		esac
	;;
	esac
	;;
esac

: determine the e-mail address of the user who is running us
$cat <<EOM

I need to get your e-mail address in Internet format if possible, i.e.
something like user@host.domain. Please answer accurately since I have
no easy means to double check it. The default value provided below
is most probably close to reality but may not be valid from outside
your organization...

EOM
cont=x
while test "$cont"; do
	case "$MAILDOMAIN" in
	'')
		if $test -s /etc/mailname; then
			maildomain=`$cat /etc/mailname`
		else
			maildomain="$myhostname$mydomain"
		fi
		;;
	*)  maildomain="$MAILDOMAIN";;
	esac
	case "$cf_email" in
	'') dflt="$cf_by@$maildomain";;
	*)  dflt="$cf_email";;
	esac
	rp='What is your e-mail address?'
	. ./myread
	cf_email="$ans"
	case "$cf_email" in
	*@*.*) cont='' ;;
	*)
		rp='Address does not look like an Internet one.  Use it anyway?'
		case "$fastread" in
		yes) dflt=y ;;
		*) dflt=n ;;
		esac
		. ./myread
		case "$ans" in
		y*) cont='' ;;
		*) echo " " ;;
		esac
		;;
	esac
done

: Ask e-mail of administrator
$cat <<EOM

If you or somebody else will be maintaining perl at your site, please
fill in the correct e-mail address here so that they may be contacted
if necessary. You may enter "none" for no administrator.

EOM
case "$perladmin" in
'') dflt="$cf_email";;
*) dflt="$perladmin";;
esac
rp='Perl administrator e-mail address'
. ./myread
perladmin="$ans"

: determine whether to use a version number suffix for installed binaries
echo " "
$cat <<EOM
Do you want to use a version number suffix for installed binaries? This
will install 'perl$version' instead of 'perl', and likewise for other
binaries like 'perldoc' and 'cpan'. This allows many versions of perl
to be installed side-by-side. Unless you are a developer, you probably
do *not* want to do this.
EOM
case "$versiononly" in
"$define"|[Yy]*|true) dflt='y' ;;
*) dflt='n';
esac
rp="Do you want to use a version number suffix for installed binaries?"
. ./myread
case "$ans" in
[yY]*)	val="$define";;
*)	val="$undef" ;;
esac
set versiononly
eval $setvar

case "$versiononly" in
"$define") inc_version_list=''
           inc_version_list_init=0
           ;;
esac

: figure out how to guarantee perl startup
: XXX Note that this currently takes advantage of the bug that binexp ignores
:     the Configure -Dinstallprefix setting, which in turn means that under
:     relocatable @INC, initialinstalllocation is what binexp started as.
case "$startperl" in
'')
	case "$sharpbang" in
	*!)
		$cat <<EOH

I can use the #! construct to start perl on your system. This will
make startup of perl scripts faster, but may cause problems if you
want to share those scripts and perl is not in a standard place
($initialinstalllocation/perl) on all your platforms. The alternative
is to force a shell by starting the script with a single ':' character.

EOH
		case "$versiononly" in
		"$define")      dflt="$initialinstalllocation/perl$version";;
		*)              dflt="$initialinstalllocation/perl";;
		esac
		rp='What shall I put after the #! to start up perl ("none" to not use #!)?'
		. ./myread
		case "$ans" in
		none)	startperl=": # use perl";;
		*)	startperl="#!$ans"
			if $test 30 -lt `echo "$ans" | wc -c`; then
				$cat >&4 <<EOM

WARNING:  Some systems limit the #! command to 32 characters.
If you experience difficulty running Perl scripts with #!, try
installing Perl in a directory with a shorter pathname.

EOM
			fi ;;
		esac
		;;
	*) startperl=": # use perl"
		;;
	esac
	;;
esac
echo "I'll use $startperl to start perl scripts."

: figure best path for perl in scripts
case "$perlpath" in
'')
	case "$versiononly" in
	"$define")	perlpath="$initialinstalllocation/perl$version";;
	*)		perlpath="$initialinstalllocation/perl";;
	esac
	case "$startperl" in
	*!*) ;;
	*)
		$cat <<EOH

I will use the "eval 'exec'" idiom to start Perl on your system.
I can use the full path of your Perl binary for this purpose, but
doing so may cause problems if you want to share those scripts and
Perl is not always in a standard place ($initialinstalllocation/perl).

EOH
		dflt="$initialinstalllocation/perl"
		rp="What path shall I use in \"eval 'exec'\"?"
		. ./myread
		perlpath="$ans"
		;;
	esac
	;;
esac
case "$startperl" in
*!*)	;;
*)	echo "I'll use $perlpath in \"eval 'exec'\"" ;;
esac

: determine where public executable scripts go
set scriptdir scriptdir
eval $prefixit
case "$scriptdir" in
'')
	dflt="$bin"
	: guess some guesses
	$test -d /usr/share/scripts && dflt=/usr/share/scripts
	$test -d /usr/share/bin     && dflt=/usr/share/bin
	$test -d /usr/local/script  && dflt=/usr/local/script
	$test -d /usr/local/scripts && dflt=/usr/local/scripts
	$test -d $prefixexp/script  && dflt=$prefixexp/script
	set dflt
	eval $prefixup
	;;
*)  dflt="$scriptdir"
	;;
esac
$cat <<EOM

Some installations have a separate directory just for executable scripts so
that they can mount it across multiple architectures but keep the scripts in
one spot.  You might, for example, have a subdirectory of /usr/share for this.
Or you might just lump your scripts in with all your other executables.

EOM
fn=d~
rp='Where do you keep publicly executable scripts?'
. ./getfile
if $test "X$ansexp" != "X$scriptdirexp"; then
	installscript=''
fi
installscriptdir=''
prefixvar=scriptdir
. ./setprefixvar
: A little fix up for an irregularly named variable.
installscript="$installscriptdir"

: determine where add-on public executables go
case "$sitebin" in
'')	dflt=$siteprefix/bin ;;
*)	dflt=$sitebin ;;
esac
fn=d~
rp='Pathname where the add-on public executables should be installed?'
. ./getfile
prefixvar=sitebin
. ./setprefixvar

: determine where add-on html pages go
: There is no standard location, so try to copy the previously-selected
: directory structure for the core html pages.
case "$sitehtml1dir" in
'')    dflt=`echo "$html1dir" | $sed "s#^$prefix#$siteprefix#"` ;;
*)     dflt=$sitehtml1dir ;;
esac
case "$dflt" in
''|' ') dflt=none ;;
esac
fn=dn+~
rp='Pathname where the site-specific html pages should be installed?'
. ./getfile
prefixvar=sitehtml1dir
. ./setprefixvar

: determine where add-on library html pages go
: There is no standard location, so try to copy the previously-selected
: directory structure for the core html pages.
case "$sitehtml3dir" in
'')    dflt=`echo "$html3dir" | $sed "s#^$prefix#$siteprefix#"` ;;
*)     dflt=$sitehtml3dir ;;
esac
case "$dflt" in
''|' ') dflt=none ;;
esac
fn=dn+~
rp='Pathname where the site-specific library html pages should be installed?'
. ./getfile
prefixvar=sitehtml3dir
. ./setprefixvar

: determine where add-on manual pages go
case "$siteman1dir" in
'')	dflt=`echo $man1dir | $sed "s#^$prefix#$siteprefix#"` ;;
*)	dflt=$siteman1dir ;;
esac
case "$dflt" in
''|' ') dflt=none ;;
esac
fn=dn+~
rp='Pathname where the site-specific manual pages should be installed?'
. ./getfile
prefixvar=siteman1dir
. ./setprefixvar

: determine where add-on library man pages go
case "$siteman3dir" in
'')	dflt=`echo $man3dir | $sed "s#^$prefix#$siteprefix#"` ;;
*)	dflt=$siteman3dir ;;
esac
case "$dflt" in
''|' ') dflt=none ;;
esac
fn=dn+~
rp='Pathname where the site-specific library manual pages should be installed?'
. ./getfile
prefixvar=siteman3dir
. ./setprefixvar

: determine where add-on public executable scripts go
case "$sitescript" in
'')	dflt=$siteprefix/script
	$test -d $dflt || dflt=$sitebin ;;
*)  dflt="$sitescript" ;;
esac
fn=d~+
rp='Pathname where add-on public executable scripts should be installed?'
. ./getfile
prefixvar=sitescript
. ./setprefixvar

: see if backtrace exists
set backtrace d_backtrace
eval $inlibc

: Check if C backtrace is actually supported.
case "$usecbacktrace" in
  "") usecbacktrace=$undef ;;
  [yY]*|true|$define)
    case "$d_backtrace" in
      [yY]*|true|$define)
        ;;
      *)
        echo "This system does not support backtrace" >&4
        usecbacktrace=$undef
        ;;
      esac
    ;;
  esac

: Check if faststdio is requested and available
case "$usefaststdio" in
$define|true|[yY]*|'')
	xversion=`awk '/define[ 	]+PERL_VERSION/ {print $3}' $rsrc/patchlevel.h`
	case "$xversion" in
	[68])	dflt='y' ;;
	*)	dflt='n' ;;
	esac
	;;
*) dflt='n';;
esac
cat <<EOM

Perl can be built to use 'fast stdio', which means using the stdio
library but also directly manipulating the stdio buffers to enable
faster I/O.  Using stdio is better for backward compatibility (especially
for Perl extensions), but on the other hand since Perl 5.8 the 'perlio'
interface has been preferred instead of stdio.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Use the "fast stdio" if available?'
. ./myread
case "$ans" in
y|Y)	val="$define" ;;
*)      val="$undef" ;;
esac
set usefaststdio
eval $setvar

: define an is-a-typedef? function
typedef='type=$1; var=$2; def=$3; shift; shift; shift; inclist=$@;
case "$inclist" in
"") inclist="sys/types.h";;
esac;
eval "varval=\$$var";
case "$varval" in
"")
	$rm -f temp.c;
	for inc in $inclist; do
		echo "#include <$inc>" >>temp.c;
	done;
	echo "#ifdef $type" >> temp.c;
	echo "printf(\"We have $type\");" >> temp.c;
	echo "#endif" >> temp.c;
	$cppstdin $cppflags $cppminus < temp.c >temp.E 2>/dev/null;
	if $contains $type temp.E >/dev/null 2>&1; then
		eval "$var=\$type";
	else
		eval "$var=\$def";
	fi;
	$rm -f temp.?;;
*) eval "$var=\$varval";;
esac'

: define an is-a-typedef? function that prompts if the type is not available.
typedef_ask='type=$1; var=$2; def=$3; shift; shift; shift; inclist=$@;
case "$inclist" in
"") inclist="sys/types.h";;
esac;
eval "varval=\$$var";
case "$varval" in
"")
	$rm -f temp.c;
	for inc in $inclist; do
		echo "#include <$inc>" >>temp.c;
	done;
	echo "#ifdef $type" >> temp.c;
	echo "printf(\"We have $type\");" >> temp.c;
	echo "#endif" >> temp.c;
	$cppstdin $cppflags $cppminus < temp.c >temp.E 2>/dev/null;
	echo " " ;
	echo "$rp" | $sed -e "s/What is/Looking for/" -e "s/?/./";
	if $contains $type temp.E >/dev/null 2>&1; then
		echo "$type found." >&4;
		eval "$var=\$type";
	else
		echo "$type NOT found." >&4;
		dflt="$def";
		. ./myread ;
		eval "$var=\$ans";
	fi;
	$rm -f temp.?;;
*) eval "$var=\$varval";;
esac'

: see what type lseek is declared as in the kernel
rp="What is the type used for lseek's offset on this system?"
set off_t lseektype long stdio.h sys/types.h
eval $typedef_ask

echo " "
echo "Checking to see how big your file offsets are..." >&4
$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof($lseektype));
    return(0);
}
EOCP
set try
if eval $compile_ok; then
	lseeksize=`$run ./try`
	echo "Your file offsets are $lseeksize bytes long."
else
	dflt=$longsize
	echo " "
	echo "(I can't seem to compile the test program.  Guessing...)"
	rp="What is the size of your file offsets (in bytes)?"
	. ./myread
	lseeksize="$ans"
fi
$rm_try

: see what type file positions are declared as in the library
rp="What is the type for file position used by fsetpos()?"
set fpos_t fpostype long stdio.h sys/types.h
eval $typedef_ask

: Check size for Fpos_t
echo " "
case "$fpostype" in
*_t) zzz="$fpostype"	;;
*)   zzz="fpos_t"	;;
esac
echo "Checking the size of $zzz..." >&4
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
    printf("%d\n", (int)sizeof($fpostype));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	yyy=`$run ./try`
	case "$yyy" in
	'')	fpossize=4
		echo "(I can't execute the test program--guessing $fpossize.)" >&4
		;;
	*)	fpossize=$yyy
		echo "Your $zzz is $fpossize bytes long."
		;;
	esac
else
	dflt="$longsize"
	echo " " >&4
	echo "(I can't compile the test program.  Guessing...)" >&4
	rp="What is the size of your file positions (in bytes)?"
	. ./myread
	fpossize="$ans"
fi

: Check for large file support
# Backward compatibility (uselfs is deprecated).
case "$uselfs" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** Configure -Duselfs is deprecated, using -Duselargefiles instead.
EOM
	uselargefiles="$define"
	;;
esac

case "$lseeksize:$fpossize" in
8:8) cat <<EOM

You can have files larger than 2 gigabytes.
EOM
   val="$define" ;;
*)    case "$uselargefiles" in
   "$undef"|false|[nN]*) dflt='n' ;;
   *)	dflt='y' ;;
   esac
   cat <<EOM

Perl can be built to understand large files (files larger than 2 gigabytes)
on some systems.  To do so, Configure can be run with -Duselargefiles.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
   rp='Try to understand large files, if available?'
   . ./myread
   case "$ans" in
   y|Y)	val="$define" ;;
   *)	val="$undef"  ;;
   esac
   ;;
esac
set uselargefiles
eval $setvar
: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that a large files perl is to be built,
: we may need to set or change some other defaults.
if $test -f uselargefiles.cbu; then
	echo "Your platform has some specific hints regarding large file builds, using them..."
	. ./uselargefiles.cbu
fi
case "$uselargefiles" in
"$define")
	if $test -f uselargefiles.cbu; then
		echo " "
		echo "Rechecking to see how big your file offsets are..." >&4
		$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof($lseektype));
    return(0);
}
EOCP
		set try
		if eval $compile_ok; then
			lseeksize=`$run ./try`
			$echo "Your file offsets are now $lseeksize bytes long."
		else
			dflt="$lseeksize"
			echo " "
			echo "(I can't seem to compile the test program.  Guessing...)"
			rp="What is the size of your file offsets (in bytes)?"
			. ./myread
			lseeksize="$ans"
		fi
		case "$fpostype" in
		*_t) zzz="$fpostype"	;;
		*)   zzz="fpos_t"	;;
		esac
		$echo $n "Rechecking the size of $zzz...$c" >&4
		$cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
    printf("%d\n", (int)sizeof($fpostype));
    return(0);
}
EOCP
		set try
		if eval $compile_ok; then
			yyy=`$run ./try`
			dflt="$lseeksize"
			case "$yyy" in
			'')	echo " "
				echo "(I can't execute the test program--guessing $fpossize.)" >&4
				;;
			*)	fpossize=$yyy
				echo " $fpossize bytes." >&4
				;;
			esac
		else
			dflt="$fpossize"
			echo " "
			echo "(I can't compile the test program.  Guessing...)" >&4
			rp="What is the size of your file positions (in bytes)?"
			. ./myread
			fpossize="$ans"
		fi
		$rm_try
	fi
	;;
esac

: Check if we want perlio
useperlio="$define"

: Set the vendorbin variables
case "$vendorprefix" in
'')	d_vendorbin="$undef"
	vendorbin=''
	vendorbinexp=''
	;;
*)	d_vendorbin="$define"
	: determine where vendor-supplied executables go.
	case "$vendorbin" in
	'') dflt=$vendorprefix/bin ;;
	*)	dflt="$vendorbin" ;;
	esac
	fn=d~+
	rp='Pathname for the vendor-supplied executables directory?'
	. ./getfile
	vendorbin="$ans"
	vendorbinexp="$ansexp"
	;;
esac
prefixvar=vendorbin
. ./installprefix

: Set the vendorhtml1dir variables
case "$vendorprefix" in
'')	vendorhtml1dir=''
	vendorhtml1direxp=''
	;;
*)	: determine where vendor-supplied html pages go.
	: There is no standard location, so try to copy the previously-selected
	: directory structure for the core html pages.
	: XXX Better default suggestions would be welcome.
	case "$vendorhtml1dir" in
	'')	dflt=`echo "$html1dir" | $sed "s#^$prefix#$vendorprefix#"` ;;
	*)	dflt=$vendorhtml1dir ;;
	esac
	case "$dflt" in
	''|' ') dflt=none ;;
	esac
	fn=dn+~
	rp='Pathname for the vendor-supplied html pages?'
	. ./getfile
	vendorhtml1dir="$ans"
	vendorhtml1direxp="$ansexp"
	;;
esac
: Use ' ' for none so value is preserved next time through Configure
$test X"$vendorhtml1dir" = "X" && vendorhtml1dir=' '
prefixvar=vendorhtml1dir
. ./installprefix

: Set the vendorhtml3dir variables
case "$vendorprefix" in
'')	vendorhtml3dir=''
	vendorhtml3direxp=''
	;;
*)	: determine where vendor-supplied module html pages go.
	: There is no standard location, so try to copy the previously-selected
	: directory structure for the core html pages.
	: XXX Better default suggestions would be welcome.
	case "$vendorhtml3dir" in
	'')	dflt=`echo "$html3dir" | $sed "s#^$prefix#$vendorprefix#"` ;;
	*)	dflt=$vendorhtml3dir ;;
	esac
	case "$dflt" in
	''|' ') dflt=none ;;
	esac
	fn=dn+~
	rp='Pathname for the vendor-supplied html pages?'
	. ./getfile
	vendorhtml3dir="$ans"
	vendorhtml3direxp="$ansexp"
	;;
esac
: Use ' ' for none so value is preserved next time through Configure
$test X"$vendorhtml3dir" = "X" && vendorhtml3dir=' '
prefixvar=vendorhtml3dir
. ./installprefix

: Set the vendorman1dir variables
case "$vendorprefix" in
'')	vendorman1dir=''
	vendorman1direxp=''
	;;
*)	: determine where vendor-supplied manual pages go.
	case "$vendorman1dir" in
	'') dflt=`echo "$man1dir" | $sed "s#^$prefix#$vendorprefix#"` ;;
	*)	dflt=$vendorman1dir ;;
	esac
	case "$dflt" in
	''|' ') dflt=none ;;
	esac
	fn=nd~+
	rp='Pathname for the vendor-supplied manual section 1 pages?'
	. ./getfile
	vendorman1dir="$ans"
	vendorman1direxp="$ansexp"
	;;
esac
: Use ' ' for none so value is preserved next time through Configure
$test X"$vendorman1dir" = "X" && vendorman1dir=' '
prefixvar=vendorman1dir
. ./installprefix

: Set the vendorman3dir variables
case "$vendorprefix" in
'')	vendorman3dir=''
	vendorman3direxp=''
	;;
*)	: determine where vendor-supplied module manual pages go.
	case "$vendorman3dir" in
	'') dflt=`echo "$man3dir" | $sed "s#^$prefix#$vendorprefix#"` ;;
	*)	dflt=$vendorman3dir ;;
	esac
	case "$dflt" in
	''|' ') dflt=none ;;
	esac
	fn=nd~+
	rp='Pathname for the vendor-supplied manual section 3 pages?'
	. ./getfile
	vendorman3dir="$ans"
	vendorman3direxp="$ansexp"
	;;
esac
: Use ' ' for none so value is preserved next time through Configure
$test X"$vendorman3dir" = "X" && vendorman3dir=' '
prefixvar=vendorman3dir
. ./installprefix

: Set the vendorscript variables
case "$vendorprefix" in
'')	d_vendorscript="$undef"
	vendorscript=''
	vendorscriptexp=''
	;;
*)	d_vendorscript="$define"
	: determine where vendor-supplied scripts go.
	case "$vendorscript" in
	'')	dflt=$vendorprefix/script
		$test -d $dflt || dflt=$vendorbin ;;
	*)  dflt="$vendorscript" ;;
	esac
	$cat <<EOM

The installation process will create a directory for
vendor-supplied scripts.

EOM
	fn=d~+
	rp='Pathname for the vendor-supplied scripts directory?'
	. ./getfile
	vendorscript="$ans"
	vendorscriptexp="$ansexp"
	;;
esac
prefixvar=vendorscript
. ./installprefix

: see if qgcvt exists
set qgcvt d_qgcvt
eval $inlibc

: Check what kind of doubles your system has
$echo "Checking the kind of doubles you have..." >&4
$cat >try.c <<EOP
#$i_stdlib I_STDLIB
#define DOUBLESIZE $doublesize
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <stdio.h>
static const double d = -0.1;
int main() {
  unsigned const char* b = (unsigned const char*)(&d);
#if DOUBLESIZE == 4
  if (b[0] == 0xCD && b[3] == 0xBD) {
    /* IEEE 754 32-bit little-endian */
    printf("1\n");
    exit(0);
  }
  if (b[0] == 0xBD && b[3] == 0xCD) {
    /* IEEE 754 32-bit big-endian */
    printf("2\n");
    exit(0);
  }
  if (b[0] == 0xCC && b[3] == 0xCC) {
    /* VAX format F, 32-bit PDP-style mixed endian. */
    printf("9\n");
    exit(0);
  }
  if (b[0] == 0xC0 && b[3] == 0x9A) {
    /* IBM single 32-bit */
    printf("12\n");
    exit(0);
  }
#endif
#if DOUBLESIZE == 8
  if (b[0] == 0x9A && b[7] == 0xBF) {
    /* IEEE 754 64-bit little-endian */
    printf("3\n");
    exit(0);
  }
  if (b[0] == 0xBF && b[7] == 0x9A) {
    /* IEEE 754 64-bit big-endian */
    printf("4\n");
    exit(0);
  }
  if (b[0] == 0x99 && b[3] == 0xBF && b[4] == 0x9A && b[7] == 0x99) {
   /* ARM mixed endian: two little-endian 32-bit floats, in big endian order:
    * 4 5 6 7 0 1 2 3 (MSB = 7, LSB = 0)
    * 99 99 b9 bf 9a 99 99 99 */
    printf("7\n");
    exit(0);
  }
  if (b[0] == 0x99 && b[3] == 0x9A && b[4] == 0xBF && b[7] == 0x99) {
   /* The opposite of case 7, mixed endian: two big-endian 32-bit floats,
    * in little endian order: 3 2 1 0 7 6 5 4 (MSB = 7, LSB = 0)
    * 99 99 99 9a bf b9 99 99 */
    printf("8\n");
    exit(0);
  }
  if (b[0] == 0xCC && b[7] == 0xCC) {
   /* VAX format D, 64-bit PDP-style mixed endian. */
    printf("10\n");
    exit(0);
  }
  if (b[0] == 0xD9 && b[7] == 0x99) {
   /* VAX format G, 64-bit PDP-style mixed endian. */
    printf("11\n");
    exit(0);
  }
  if (b[0] == 0xC0 && b[7] == 0x9A) {
    /* IBM double 64-bit */
    printf("13\n");
    exit(0);
  }
  if (b[0] == 0xBF && b[7] == 0xCD) {
    /* CRAY single 64-bit */
    printf("14\n");
    exit(0);
  }
#endif
#if DOUBLESIZE == 16
  if (b[0] == 0x9A && b[15] == 0xBF) {
    /* IEEE 754 128-bit little-endian */
    printf("5\n");
    exit(0);
  }
  if (b[0] == 0xBF && b[15] == 0x9A) {
    /* IEEE 754 128-bit big-endian */
    printf("6\n");
    exit(0);
  }
#endif
  /* Then there are old mainframe/miniframe formats like IBM and CRAY.
   * Whether those environments can still build Perl is debatable. */
  printf("-1\n"); /* unknown */
  exit(0);
}
EOP
set try
if eval $compile; then
    doublekind=`$run ./try`
else
    doublekind=-1
fi
case "$doublekind" in
1) echo "You have IEEE 754 32-bit little endian doubles." >&4 ;;
2) echo "You have IEEE 754 32-bit big endian doubles." >&4 ;;
3) echo "You have IEEE 754 64-bit little endian doubles." >&4 ;;
4) echo "You have IEEE 754 64-bit big endian doubles." >&4 ;;
5) echo "You have IEEE 754 128-bit little endian doubles." >&4 ;;
6) echo "You have IEEE 754 128-bit big endian doubles." >&4 ;;
7) echo "You have IEEE 754 64-bit mixed endian doubles (32-bit LEs in BE)." >&4 ;;
8) echo "You have IEEE 754 64-bit mixed endian doubles (32-bit BEs in LE)." >&4 ;;
9) echo "You have VAX format F 32-bit PDP-style mixed endian doubles." >&4 ;;
10) echo "You have VAX format D 64-bit PDP-style mixed endian doubles." >&4 ;;
11) echo "You have VAX format G 64-bit PDP-style mixed endian doubles." >&4 ;;
12) echo "You have IBM short 32-bit doubles." >&4 ;;
13) echo "You have IBM long 64-bit doubles." >&4 ;;
14) echo "You have Cray single 64-bit doubles." >&4 ;;
*) echo "Cannot figure out your double.  You Cyber, or something?" >&4 ;;
esac
d_double_style_ieee=$undef
d_double_style_vax=$undef
d_double_style_ibm=$undef
d_double_style_cray=$undef
case "$doublekind" in
1|2|3|4|5|6|7|8) d_double_style_ieee=$define ;;
9|10|11) d_double_style_vax=$define ;;
12|13) d_double_style_ibm=$define ;;
14) d_double_style_cray=$define ;;
esac
case "$d_double_style_ieee" in
$define)
    d_double_has_inf=$define
    d_double_has_nan=$define
    d_double_has_negative_zero=$define
    d_double_has_subnormals=$define
    ;;
*)
    d_double_has_inf=$undef
    d_double_has_nan=$undef
    d_double_has_negative_zero=$undef
    d_double_has_subnormals=$undef
    ;;
esac
$rm_try

: Check print/scan long double stuff
echo " "

if $test X"$d_longdbl" = X"$define"; then

echo "Checking how to print long doubles..." >&4

if $test X"$sPRIfldbl" = X -a X"$doublesize" = X"$longdblsize"; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  double d = 123.456;
  printf("%.3f\n", d);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		123.456)
			sPRIfldbl='"f"'; sPRIgldbl='"g"'; sPRIeldbl='"e"';
			sPRIFUldbl='"F"'; sPRIGUldbl='"G"'; sPRIEUldbl='"E"';
			echo "We will use %f."
			;;
		esac
	fi
fi

if $test X"$sPRIfldbl" = X; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long double d = 123.456;
  printf("%.3Lf\n", d);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		123.456)
			sPRIfldbl='"Lf"'; sPRIgldbl='"Lg"'; sPRIeldbl='"Le"';
			sPRIFUldbl='"LF"'; sPRIGUldbl='"LG"'; sPRIEUldbl='"LE"';
			echo "We will use %Lf."
			;;
		esac
	fi
fi

if $test X"$sPRIfldbl" = X; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long double d = 123.456;
  printf("%.3llf\n", d);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		123.456)
			sPRIfldbl='"llf"'; sPRIgldbl='"llg"'; sPRIeldbl='"lle"';
			sPRIFUldbl='"llF"'; sPRIGUldbl='"llG"'; sPRIEUldbl='"llE"';
			echo "We will use %llf."
			;;
		esac
	fi
fi

if $test X"$sPRIfldbl" = X; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long double d = 123.456;
  printf("%.3lf\n", d);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		123.456)
			sPRIfldbl='"lf"'; sPRIgldbl='"lg"'; sPRIeldbl='"le"';
			sPRIFUldbl='"lF"'; sPRIGUldbl='"lG"'; sPRIEUldbl='"lE"';
			echo "We will use %lf."
			;;
		esac
	fi
fi

if $test X"$sPRIfldbl" = X; then
	echo "Cannot figure out how to print long doubles." >&4
else
	sSCNfldbl=$sPRIfldbl	# expect consistency
fi

$rm_try

fi # d_longdbl

case "$sPRIfldbl" in
'')	d_PRIfldbl="$undef"; d_PRIgldbl="$undef"; d_PRIeldbl="$undef";
	d_PRIFUldbl="$undef"; d_PRIGUldbl="$undef"; d_PRIEUldbl="$undef";
	d_SCNfldbl="$undef";
	;;
*)	d_PRIfldbl="$define"; d_PRIgldbl="$define"; d_PRIeldbl="$define";
	d_PRIFUldbl="$define"; d_PRIGUldbl="$define"; d_PRIEUldbl="$define";
	d_SCNfldbl="$define";
	;;
esac

: Before committing on uselongdouble, see whether that looks sane.
if $test "$uselongdouble" = "$define"; then
    message=""
    echo " "
    echo "Checking if your long double math functions work right..." >&4
    $cat > try.c <<EOF
#include <math.h>
#include <stdio.h>
int main() {
  printf("%"$sPRIgldbl"\n", sqrtl(logl(expl(cosl(sinl(0.0L))))+powl(2.0L, 3.0L)));
}
EOF
    case "$osname:$gccversion" in
    aix:)	saveccflags="$ccflags"
		ccflags="$ccflags -qlongdouble" ;; # to avoid core dump
    esac
    set try
    if eval $compile_ok; then
      yyy=`$run ./try`
    fi
    case "$yyy" in
    3) echo "Your long double math functions are working correctly." >&4 ;;
    *) echo "Your long double math functions are broken, not using long doubles." >&4
       uselongdouble=$undef
       ;;
    esac
    $rm_try
    case "$osname:$gccversion" in
    aix:)	ccflags="$saveccflags" ;; # restore
    esac
fi

: Check how to convert floats to strings.

if test "X$d_Gconvert" = X; then

echo " "
echo "Checking for an efficient way to convert floats to strings."
echo " " > try.c
case "$uselongdouble" in
"$define") echo "#define USE_LONG_DOUBLE" >>try.c ;;
esac
case "$d_longdbl" in
"$define") echo "#define HAS_LONG_DOUBLE" >>try.c ;;
esac
case "$d_PRIgldbl" in
"$define") echo "#define HAS_PRIgldbl"    >>try.c ;;
esac
$cat >>try.c <<EOP
#ifdef TRY_gconvert
#define Gconvert(x,n,t,b) gconvert((x),(n),(t),(b))
const char *myname = "gconvert";
#endif
#ifdef TRY_gcvt
#define Gconvert(x,n,t,b) gcvt((x),(n),(b))
const char *myname = "gcvt";
#endif
#ifdef TRY_qgcvt
#define Gconvert(x,n,t,b) qgcvt((x),(n),(b))
const char *myname = "qgcvt";
#define DOUBLETYPE long double
#endif
#ifdef TRY_sprintf
#if defined(USE_LONG_DOUBLE) && defined(HAS_LONG_DOUBLE)
#ifdef HAS_PRIgldbl
#define Gconvert(x,n,t,b) sprintf((b),"%.*"$sPRIgldbl,(n),(x))
#else
#define Gconvert(x,n,t,b) sprintf((b),"%.*g",(n),(double)(x))
#endif
#else
#define Gconvert(x,n,t,b) sprintf((b),"%.*g",(n),(x))
#endif
const char *myname = "sprintf";
#endif

#ifndef DOUBLETYPE
#if defined(USE_LONG_DOUBLE) && defined(HAS_LONG_DOUBLE)
#define DOUBLETYPE long double
#else
#define DOUBLETYPE double
#endif
#endif

#include <stdio.h>

#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <string.h>

void checkit(const char *expect, char *got)
{
    if (strcmp(expect, got)) {
		printf("%s oddity:  Expected %s, got %s\n",
			myname, expect, got);
		exit(1);
	}
}

void lencheck(int expect, int got)
{
    if (expect != got) {
		printf("%s length mismatch:  Expected %d, got %d\n",
			myname, expect, got);
		exit(1);
	}
}

int main()
{
	char buf[64];
	buf[63] = '\0';

	/* This must be 1st test on (which?) platform */
	/* Alan Burlison <AlanBurlsin@unn.unisys.com> */
	Gconvert((DOUBLETYPE)0.1, 8, 0, buf);
	checkit("0.1", buf);

	Gconvert((DOUBLETYPE)0.01, 8, 0, buf);
	checkit("0.01", buf);

	Gconvert((DOUBLETYPE)0.001, 8, 0, buf);
	checkit("0.001", buf);

	Gconvert((DOUBLETYPE)0.0001, 8, 0, buf);
	checkit("0.0001", buf);

	Gconvert((DOUBLETYPE)0.00009, 8, 0, buf);
	if (strlen(buf) > 5)
	    checkit("9e-005", buf); /* for Microsoft ?? */
	else
	    checkit("9e-05", buf);

	Gconvert((DOUBLETYPE)1.0, 8, 0, buf);
	checkit("1", buf);

	Gconvert((DOUBLETYPE)1.1, 8, 0, buf);
	checkit("1.1", buf);

	Gconvert((DOUBLETYPE)1.01, 8, 0, buf);
	checkit("1.01", buf);

	Gconvert((DOUBLETYPE)1.001, 8, 0, buf);
	checkit("1.001", buf);

	Gconvert((DOUBLETYPE)1.0001, 8, 0, buf);
	checkit("1.0001", buf);

	Gconvert((DOUBLETYPE)1.00001, 8, 0, buf);
	checkit("1.00001", buf);

	Gconvert((DOUBLETYPE)1.000001, 8, 0, buf);
	checkit("1.000001", buf);

	Gconvert((DOUBLETYPE)0.0, 8, 0, buf);
	checkit("0", buf);

	Gconvert((DOUBLETYPE)-1.0, 8, 0, buf);
	checkit("-1", buf);

	/* Some Linux gcvt's give 1.e+5 here. */
	Gconvert((DOUBLETYPE)100000.0, 8, 0, buf);
	checkit("100000", buf);

	/* Some Linux gcvt's give -1.e+5 here. */
	Gconvert((DOUBLETYPE)-100000.0, 8, 0, buf);
	checkit("-100000", buf);

	Gconvert((DOUBLETYPE)123.456, 8, 0, buf);
	checkit("123.456", buf);

	/* Testing of 1e+129 in bigintpm.t must not get extra '.' here. */
	Gconvert((DOUBLETYPE)1e34, 8, 0, buf);
	/* 34 should be enough to scare even long double
	 * places into using the e notation. */
	if (strlen(buf) > 5)
	    checkit("1e+034", buf); /* for Microsoft */
	else
	    checkit("1e+34", buf);

	/* Test for an Ubuntu/Debian bug in gcvt and qgcvt. See:        *
	 * https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1899553 */

	Gconvert((DOUBLETYPE)0.4, 53, 0, buf);
	lencheck(55, (int)strlen(buf));

	/* For Perl, if you add additional tests here, also add them to
	 * t/base/num.t for benefit of platforms not using Configure or
	 * overriding d_Gconvert */

	exit(0);
}
EOP
: first add preferred functions to our list
xxx_list=""
for xxx_convert in $gconvert_preference; do
    case $xxx_convert in
    gcvt|gconvert|sprintf) xxx_list="$xxx_list $xxx_convert" ;;
    *) echo "Discarding unrecognized gconvert_preference $xxx_convert" >&4 ;;
    esac
done
: then add any others
for xxx_convert in gconvert gcvt sprintf; do
    case "$xxx_list" in
    *$xxx_convert*) ;;
    *) xxx_list="$xxx_list $xxx_convert" ;;
    esac
done

case "$d_longdbl$uselongdouble" in
"$define$define")
    : again, add preferred functions to our list first
    xxx_ld_list=""
    for xxx_convert in $gconvert_ld_preference; do
        case $xxx_convert in
        qgcvt|gcvt|gconvert|sprintf) xxx_ld_list="$xxx_ld_list $xxx_convert" ;;
        *) echo "Discarding unrecognized gconvert_ld_preference $xxx_convert" ;;
        esac
    done
    : then add qgcvt, sprintf--then, in xxx_list order, gconvert and gcvt
    for xxx_convert in qgcvt sprintf $xxx_list; do
        case "$xxx_ld_list" in
        $xxx_convert*|*" $xxx_convert"*) ;;
        *) xxx_ld_list="$xxx_ld_list $xxx_convert" ;;
        esac
    done
    : if sprintf cannot do long doubles, move it to the end
    if test "$d_PRIgldbl" != "$define"; then
        xxx_ld_list="`echo $xxx_ld_list|sed s/sprintf//` sprintf"
    fi
    : if no qgcvt, remove it
    if test "$d_qgcvt" != "$define"; then
        xxx_ld_list="`echo $xxx_ld_list|sed s/qgcvt//`"
    fi
    : use the ld_list
    xxx_list="$xxx_ld_list"
    ;;
esac

for xxx_convert in $xxx_list; do
	echo "Trying $xxx_convert..."
	$rm -f try try$_o core
	set try -DTRY_$xxx_convert
	if eval $compile; then
		echo "$xxx_convert() found." >&4
		if $run ./try; then
			echo "I'll use $xxx_convert to convert floats into a string." >&4
			break;
		else
			echo "...But $xxx_convert didn't work as I expected."
			xxx_convert=''
		fi
	else
		echo "$xxx_convert NOT found." >&4
		xxx_convert=''
	fi
done

if test X$xxx_convert = X; then
    echo "*** WHOA THERE!!! ***" >&4
    echo "None of ($xxx_list)  seemed to work properly.  I'll use sprintf." >&4
    xxx_convert=sprintf
fi

case "$xxx_convert" in
gconvert) d_Gconvert='gconvert((x),(n),(t),(b))' ;;
gcvt) d_Gconvert='gcvt((x),(n),(b))' ;;
qgcvt) d_Gconvert='qgcvt((x),(n),(b))' ;;
*) case "$uselongdouble$d_longdbl$d_PRIgldbl" in
   "$define$define$define")
      d_Gconvert="sprintf((b),\"%.*\"$sPRIgldbl,(n),(x))" ;;
   "$define$define$undef")
      d_Gconvert='sprintf((b),"%.*g",(n),(double)(x))' ;;
   *) d_Gconvert='sprintf((b),"%.*g",(n),(x))' ;;
   esac
   ;;
esac

fi
$rm_try

: see if _fwalk exists
set fwalk d__fwalk
eval $inlibc

: see if accept4 exists
set accept4 d_accept4
eval $inlibc

: Initialize h_fcntl
h_fcntl=false

: Initialize h_sysfile
h_sysfile=false

: access call always available on UNIX
set access d_access
eval $inlibc

: locate the flags for 'access()'
case "$d_access" in
"$define")
	echo " "
	$cat >access.c <<EOCP
#include <sys/types.h>
#ifdef I_FCNTL
#include <fcntl.h>
#endif
#ifdef I_SYS_FILE
#include <sys/file.h>
#endif
#ifdef I_UNISTD
#include <unistd.h>
#endif
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
	exit(R_OK);
}
EOCP
	: check sys/file.h first, no particular reason here
	if $test `./findhdr sys/file.h` && \
		$cc -o access $cppflags -DI_SYS_FILE access.c >/dev/null 2>&1 ; then
		h_sysfile=true;
		echo "<sys/file.h> defines the *_OK access constants." >&4
	elif $test `./findhdr fcntl.h` && \
		$cc -o access $cppflags -DI_FCNTL access.c >/dev/null 2>&1 ; then
		h_fcntl=true;
		echo "<fcntl.h> defines the *_OK access constants." >&4
	elif $test `./findhdr unistd.h` && \
		$cc -o access $cppflags -DI_UNISTD access.c >/dev/null 2>&1 ; then
		echo "<unistd.h> defines the *_OK access constants." >&4
	else
		echo "I can't find the four *_OK access constants--I'll use mine." >&4
	fi
	;;
esac
$rm -f access*

: see if accessx exists
set accessx d_accessx
eval $inlibc

: see if acosh exists
set acosh d_acosh
eval $inlibc

: see if aintl exists
set aintl d_aintl
eval $inlibc

: see if alarm exists
set alarm d_alarm
eval $inlibc

: see if 64bit time functions exists

set ctime64 d_ctime64
eval $inlibc

set localtime64 d_localtime64
eval $inlibc

set gmtime64 d_gmtime64
eval $inlibc

set mktime64 d_mktime64
eval $inlibc

set difftime64 d_difftime64
eval $inlibc

set asctime64 d_asctime64
eval $inlibc

: see if POSIX threads are available
set pthread.h i_pthread
eval $inhdr

: define a function to check prototypes
$cat > protochk <<EOSH
$startsh
cc="$cc"
optimize="$optimize"
ccflags="$ccflags"
define="$define"
rm_try="$rm_try"
usethreads=$usethreads
i_pthread=$i_pthread
pthread_h_first=$pthread_h_first
EOSH

$cat >> protochk <<'EOSH'

$rm_try
foo="$1"
shift
while test $# -ge 2; do
	case "$1" in
		$define) echo "#include <$2>" >> try.c ;;
		literal) echo "$2" >> try.c ;;
	esac
    # Extra magic for the benefit of systems that need pthread.h
    # to be included early to correctly detect threadsafe functions.
    # Such functions must guarantee themselves, though, that the usethreads
    # and i_pthread have been defined, before calling protochk.
    if test "$usethreads" = "$define" -a "$i_pthread" = "$define" -a "$pthread_h_first" = "$define" -a "$pthread_h_done" = ""; then
	echo "#include <pthread.h>" >> try.c
	pthread_h_done=yes
    fi
    shift 2
done
cat >> try.c <<'EOCP'
#define _(args) args
EOCP
echo "$foo" >> try.c
echo 'int no_real_function_has_this_name _((void)) { return 0; }' >> try.c
$cc $optimize $ccflags -c try.c > /dev/null 2>&1
status=$?
$rm_try
exit $status
EOSH
chmod +x protochk
$eunicefix protochk

: Define hasproto macro for Configure internal use
hasproto='varname=$1; func=$2; shift; shift;
while $test $# -ge 2; do
	case "$1" in
	$define) echo "#include <$2>";;
	literal) echo "$2" ;;
	esac ;
    shift 2;
done > try.c;
$cppstdin $cppflags $cppminus < try.c > tryout.c 2>/dev/null;
if $contains "$func.*(" tryout.c >/dev/null 2>&1; then
	echo "$func() prototype found.";
	val="$define";
else
	echo "$func() prototype NOT found.";
	val="$undef";
fi;
set $varname;
eval $setvar;
$rm_try tryout.c'

: see if sys/types.h has to be included
set sys/types.h i_systypes
eval $inhdr

: see if sys/select.h has to be included
set sys/select.h i_sysselct
eval $inhdr

: Define hasfield macro for Configure internal use
hasfield='varname=$1; struct=$2; field=$3; shift; shift; shift;
while $test $# -ge 2; do
	case "$1" in
	$define) echo "#include <$2>";;
	esac ;
    shift 2;
done > try.c;
echo "int main () { struct $struct foo; char* bar; bar = (char*)foo.$field; }" >> try.c;
set try;
if eval $compile; then
	val="$define";
else
	val="$undef";
fi;
set $varname;
eval $setvar;
$rm_try'

: see if we should include sys/time.h
echo " "
i_time='define'
if test "X$timeincl" = X; then
	echo "Testing to see if we should include <sys/time.h>." >&4
	$echo $n "I'm now running the test program...$c"
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <time.h>
#ifdef I_SYSTIME
#ifdef SYSTIMEKERNEL
#define KERNEL
#endif
#include <sys/time.h>
#endif
#ifdef I_SYSSELECT
#include <sys/select.h>
#endif
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main()
{
	struct tm foo;
#ifdef S_TIMEVAL
	struct timeval bar;
#endif
#ifdef S_TIMEZONE
	struct timezone tzp;
#endif
	if (foo.tm_sec == foo.tm_sec)
		exit(0);
#ifdef S_TIMEVAL
	if (bar.tv_sec == bar.tv_sec)
		exit(0);
#endif
	exit(1);
}
EOCP
	flags=''
	for s_timezone in '-DS_TIMEZONE' ''; do
	sysselect=''
	for s_timeval in '-DS_TIMEVAL' ''; do
	for i_systimek in '' '-DSYSTIMEKERNEL'; do
	for i_systime in '-DI_SYSTIME' ''; do
		case "$flags" in
		'') $echo $n ".$c"
			set try $i_systime $i_systimek $sysselect $s_timeval $s_timezone
			if eval $compile; then
				set X $i_systime $i_systimek $sysselect $s_timeval
				shift
				flags="$*"
				echo " "
				$echo $n "Succeeded with $flags$c"
			fi
			;;
		esac
	done
	done
	done
	done
	timeincl=''
	echo " "
	case "$flags" in
	*SYSTIMEKERNEL*) i_systimek="$define"
		timeincl=`./findhdr sys/time.h`
		echo "We'll include <sys/time.h> with KERNEL defined." >&4;;
	*) i_systimek="$undef";;
	esac
	case "$flags" in
	*I_SYSTIME*) i_systime="$define"
		timeincl=`./findhdr sys/time.h`" $timeincl"
		echo "We'll include <sys/time.h>." >&4;;
	*) i_systime="$undef";;
	esac
	$rm_try
fi
: see if struct tm knows about tm_zone
case "$i_systime$i_time" in
*$define*)
        echo " "
        echo "Checking to see if your struct tm has tm_zone field..." >&4
        set d_tm_tm_zone tm tm_zone $i_systime sys/time.h $i_time time.h
        eval $hasfield
        ;;
*)      val="$undef"
        set d_tm_tm_zone
        eval $setvar
        ;;
esac
case "$d_tm_tm_zone" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac
: see if struct tm knows about tm_gmtoff
case "$i_systime$i_time" in
*$define*)
        echo " "
        echo "Checking to see if your struct tm has tm_gmtoff field..." >&4
        set d_tm_tm_gmtoff tm tm_gmtoff $i_systime sys/time.h $i_time time.h
        eval $hasfield
        ;;
*)      val="$undef"
        set d_tm_tm_gmtoff
        eval $setvar
        ;;
esac
case "$d_tm_tm_gmtoff" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac

: see if asctime_r exists
set asctime_r d_asctime_r
eval $inlibc
case "$d_asctime_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_time time.h $i_systime sys/time.h"
	case "$d_asctime_r_proto:$usethreads" in
	":define")	d_asctime_r_proto=define
		set d_asctime_r_proto asctime_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_asctime_r_proto" in
	define)
	case "$asctime_r_proto" in
	''|0) try='char* asctime_r(const struct tm*, char*);'
	./protochk "$extern_C $try" $hdrs && asctime_r_proto=B_SB ;;
	esac
	case "$asctime_r_proto" in
	''|0) try='char* asctime_r(const struct tm*, char*, int);'
	./protochk "$extern_C $try" $hdrs && asctime_r_proto=B_SBI ;;
	esac
	case "$asctime_r_proto" in
	''|0) try='int asctime_r(const struct tm*, char*);'
	./protochk "$extern_C $try" $hdrs && asctime_r_proto=I_SB ;;
	esac
	case "$asctime_r_proto" in
	''|0) try='int asctime_r(const struct tm*, char*, int);'
	./protochk "$extern_C $try" $hdrs && asctime_r_proto=I_SBI ;;
	esac
	case "$asctime_r_proto" in
	''|0)	d_asctime_r=undef
		asctime_r_proto=0
		echo "Disabling asctime_r, cannot determine prototype." >&4 ;;
	* )	case "$asctime_r_proto" in
		REENTRANT_PROTO*) ;;
		*) asctime_r_proto="REENTRANT_PROTO_$asctime_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "asctime_r has no prototype, not using it." >&4 ;;
		esac
		d_asctime_r=undef
		asctime_r_proto=0
		;;
	esac
	;;
*)	asctime_r_proto=0
	;;
esac

: see if asinh exists
set asinh d_asinh
eval $inlibc

: see if atanh exists
set atanh d_atanh
eval $inlibc

: see if atolf exists
set atolf d_atolf
eval $inlibc

: see if atoll exists
set atoll d_atoll
eval $inlibc

: See if a file contains compiler warnings
case "$osname" in
  'aix')
	cat >compiler_warning <<EOSS
# Sample for aix ('.5' indicates the column number in the line):
#    "op.h", line 203.5: 1506-159 (E) Bit field type specified for op_type
# Since the word 'warning' isn't present, use a fairly rigorous match of what
# warning messages look like
#            "    o        p        .  h   ", line    203      .   5        :   1506     -    159      (  E  )
$grep -E "^\\"[A-Za-z][A-Za-z0-9_]*\.[ch]\\", line [1-9][0-9]*[.][1-9][0-9]*: [1-9][0-9]*-[1-9][0-9]* \([EW][)] " "\$1"
EOSS
        compiler_warning=./compiler_warning
        chmod +x $compiler_warning
    ;;
     # Maybe a colon after the 'warning' would be appropriate
  *) compiler_warning="$contains -i warning"
    ;;
esac

: Look for GCC-style attribute format
case "$d_attribute_format" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((format)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
void my_special_printf(char* pat,...) __attribute__((__format__(__printf__,1,2)));
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((format))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((format))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_format" ;;
esac
set d_attribute_format
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute format with null format allowed
case "$d_printf_format_null" in
'') case "$d_attribute_format" in
    $define)
	echo " "
	echo "Checking whether your compiler allows __printf__ format to be null ..." >&4
$cat >attrib.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_inttypes I_INTTYPES
#ifdef I_INTTYPES
#include <inttypes.h>
#endif
#ifndef INTPTR_MAX
#define intptr_t int
#endif
int null_printf (char* pat,...) __attribute__((__format__(__printf__,1,2)));
int null_printf (char* pat,...) { return (int)(intptr_t)pat; }
int main () { exit(null_printf(NULL)); }
EOCP
	if $cc $ccflags -o attrib attrib.c >attrib.out 2>&1 ; then
	    : run the executable in case it produces a run-time warning
	    if $run ./attrib >>attrib.out 2>&1; then
		if $compiler_warning attrib.out >/dev/null 2>&1; then
		    echo "Your C compiler doesn't allow __printf__ format to be null."
		    val="$undef"
		else
		    echo "Your C compiler allows __printf__ format to be null."
		    val="$define"
		fi
	    else
	    echo "Your C compiler executable failed with __printf__ format null."
	    val="$undef"
	fi
    else
	echo "Your C compiler fails with __printf__ format null."
	val="$undef"
    fi
    ;;
    *)  val="$undef" ;;
    esac
;;
*)  val="$d_printf_format_null" ;;
esac
set d_printf_format_null
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute malloc
case "$d_attribute_malloc" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((malloc)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
char *go_get_some_memory( int how_many_bytes ) __attribute__((malloc));
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((malloc))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((malloc))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_malloc" ;;
esac
set d_attribute_malloc
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute nonnull
case "$d_attribute_nonnull" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((nonnull(1))) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
void do_something (char *some_pointer,...) __attribute__((nonnull(1)));
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((nonnull))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((nonnull))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_nonnull" ;;
esac
set d_attribute_nonnull
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute noreturn
case "$d_attribute_noreturn" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((noreturn)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
void fall_over_dead( void ) __attribute__((noreturn));
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((noreturn))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((noreturn))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_noreturn" ;;
esac
set d_attribute_noreturn
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute pure
case "$d_attribute_pure" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((pure)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
int square( int n ) __attribute__((pure));
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((pure))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((pure))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_pure" ;;
esac
set d_attribute_pure
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute unused
case "$d_attribute_unused" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((unused)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
int do_something( int dummy __attribute__((unused)), int n );
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((unused))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((unused))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_unused" ;;
esac
set d_attribute_unused
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute deprecated
case "$d_attribute_deprecated" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((deprecated)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
int I_am_deprecated(void) __attribute__((deprecated));
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((deprecated))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((deprecated))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_deprecated" ;;
esac
set d_attribute_deprecated
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute warn_unused_result
case "$d_attribute_warn_unused_result" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((warn_unused_result)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
int I_will_not_be_ignored(void) __attribute__((warn_unused_result));
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((warn_unused_result))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((warn_unused_result))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_warn_unused_result" ;;
esac
set d_attribute_warn_unused_result
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute always_inline
case "$d_attribute_always_inline" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((always_inline)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
static __inline__ __attribute__((always_inline)) int I_will_always_be_inlined(void);
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((always_inline))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((always_inline))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_always_inline" ;;
esac
set d_attribute_always_inline
eval $setvar
$rm -f attrib*

: Look for GCC-style attribute visibility
case "$d_attribute_visibility" in
'')
echo " "
echo "Checking whether your compiler can handle __attribute__((visibility)) ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
__attribute__((visibility("hidden"))) int I_will_be_hidden(void);
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $compiler_warning attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support __attribute__((visibility))."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__((visibility))."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
;;
*) val="$d_attribute_visibility" ;;
esac
set d_attribute_visibility
eval $setvar
$rm -f attrib*

: see if getpgrp exists
set getpgrp d_getpgrp
eval $inlibc

case "$d_getpgrp" in
"$define")
	echo " "
	echo "Checking to see which flavor of getpgrp is in use..."
	$cat >try.c <<EOP
#include <stdio.h>
#$i_unistd I_UNISTD
#include <sys/types.h>
#ifdef I_UNISTD
#  include <unistd.h>
#endif
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main()
{
	if (getuid() == 0) {
		printf("(I see you are running Configure as super-user...)\n");
		setuid(1);
	}
#ifdef TRY_BSD_PGRP
	if (getpgrp(1) == 0)
		exit(0);
#else
	if (getpgrp() > 0)
		exit(0);
#endif
	exit(1);
}
EOP
	if $cc -o try -DTRY_BSD_PGRP $ccflags $ldflags try.c $libs >/dev/null 2>&1 && $run ./try; then
		echo "You have to use getpgrp(pid) instead of getpgrp()." >&4
		val="$define"
	elif $cc -o try $ccflags $ldflags try.c $libs >/dev/null 2>&1 && $run ./try; then
		echo "You have to use getpgrp() instead of getpgrp(pid)." >&4
		val="$undef"
	else
		echo "I can't seem to compile and run the test program."
		if ./usg; then
			xxx="a USG one, i.e. you use getpgrp()."
		else
			# SVR4 systems can appear rather BSD-ish.
			case "$i_unistd" in
			$undef)
				xxx="a BSD one, i.e. you use getpgrp(pid)."
				val="$define"
				;;
			$define)
				xxx="probably a USG one, i.e. you use getpgrp()."
				val="$undef"
				;;
			esac
		fi
		echo "Assuming your getpgrp is $xxx" >&4
	fi
	;;
*) val="$undef";;
esac
set d_bsdgetpgrp
eval $setvar
$rm_try

: see if setpgrp exists
set setpgrp d_setpgrp
eval $inlibc

case "$d_setpgrp" in
"$define")
	echo " "
	echo "Checking to see which flavor of setpgrp is in use..."
	$cat >try.c <<EOP
#include <stdio.h>
#$i_unistd I_UNISTD
#include <sys/types.h>
#ifdef I_UNISTD
#  include <unistd.h>
#endif
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main()
{
	if (getuid() == 0) {
		printf("(I see you are running Configure as super-user...)\n");
		setuid(1);
	}
#ifdef TRY_BSD_PGRP
	if (-1 == setpgrp(1, 1))
		exit(0);
#else
	if (setpgrp() != -1)
		exit(0);
#endif
	exit(1);
}
EOP
	if $cc -o try -DTRY_BSD_PGRP $ccflags $ldflags try.c $libs >/dev/null 2>&1 && $run ./try; then
		echo 'You have to use setpgrp(pid,pgrp) instead of setpgrp().' >&4
		val="$define"
	elif $cc -o try $ccflags $ldflags try.c $libs >/dev/null 2>&1 && $run ./try; then
		echo 'You have to use setpgrp() instead of setpgrp(pid,pgrp).' >&4
		val="$undef"
	else
		echo "(I can't seem to compile and run the test program.)"
		if ./usg; then
			xxx="a USG one, i.e. you use setpgrp()."
		else
			# SVR4 systems can appear rather BSD-ish.
			case "$i_unistd" in
			$undef)
				xxx="a BSD one, i.e. you use setpgrp(pid,pgrp)."
				val="$define"
				;;
			$define)
				xxx="probably a USG one, i.e. you use setpgrp()."
				val="$undef"
				;;
			esac
		fi
		echo "Assuming your setpgrp is $xxx" >&4
	fi
	;;
*) val="$undef";;
esac
set d_bsdsetpgrp
eval $setvar
$rm_try

: Look for GCC-style __builtin_add_overflow
case "$d_builtin_add_overflow" in
'')
    echo " "
    echo "Checking whether your compiler can handle __builtin_add_overflow ..." >&4
    $cat >try.c <<'EOCP'
int main(void) {
    const unsigned int uint_max = ~0u;
    int target_int = 0;
    if (__builtin_add_overflow(1, 2, &target_int) || target_int != 3) {
        return 1;
    }
    if (!__builtin_add_overflow((int)(uint_max >> 1), 1, &target_int)) {
        return 1;
    }
    if (!__builtin_add_overflow(uint_max, -1, &target_int)) {
        return 1;
    }
    return 0;
}
EOCP
    set try
    if eval $compile && $run ./try; then
        echo "Your C compiler supports __builtin_add_overflow."
        val="$define"
    else
        echo "Your C compiler doesn't seem to understand __builtin_add_overflow."
        val="$undef"
    fi
    ;;
*) val="$d_builtin_add_overflow" ;;
esac

set d_builtin_add_overflow
eval $setvar
$rm_try

: Look for GCC-style __builtin_sub_overflow
case "$d_builtin_sub_overflow" in
'')
    echo " "
    echo "Checking whether your compiler can handle __builtin_sub_overflow ..." >&4
    $cat >try.c <<'EOCP'
int main(void) {
    const unsigned int uint_max = ~0u;
    int target_int = 0;
    if (__builtin_sub_overflow(1, -2, &target_int) || target_int != 3) {
        return 1;
    }
    if (!__builtin_sub_overflow(-(int)(uint_max >> 1), 2, &target_int)) {
        return 1;
    }
    if (!__builtin_sub_overflow(uint_max, 1, &target_int)) {
        return 1;
    }
    return 0;
}
EOCP
    set try
    if eval $compile && $run ./try; then
        echo "Your C compiler supports __builtin_sub_overflow."
        val="$define"
    else
        echo "Your C compiler doesn't seem to understand __builtin_sub_overflow."
        val="$undef"
    fi
    ;;
*) val="$d_builtin_sub_overflow" ;;
esac

set d_builtin_sub_overflow
eval $setvar
$rm_try

: Look for GCC-style __builtin_mul_overflow
case "$d_builtin_mul_overflow" in
'')
    echo " "
    echo "Checking whether your compiler can handle __builtin_mul_overflow ..." >&4
    $cat >try.c <<'EOCP'
int main(void) {
    const unsigned int uint_max = ~0u;
    int target_int = 0;
    if (__builtin_mul_overflow(2, 3, &target_int) || target_int != 6) {
        return 1;
    }
    if (!__builtin_mul_overflow((int)(uint_max >> 1), 2, &target_int)) {
        return 1;
    }
    if (!__builtin_mul_overflow(uint_max, 1, &target_int)) {
        return 1;
    }
    return 0;
}
EOCP
    set try
    if eval $compile && $run ./try; then
        echo "Your C compiler supports __builtin_mul_overflow."
        val="$define"
    else
        echo "Your C compiler doesn't seem to understand __builtin_mul_overflow."
        val="$undef"
    fi
    ;;
*) val="$d_builtin_mul_overflow" ;;
esac

set d_builtin_mul_overflow
eval $setvar
$rm_try

: Look for GCC-style __builtin_choose_expr
case "$d_builtin_choose_expr" in
'')
    echo " "
    echo "Checking whether your compiler can handle __builtin_choose_expr ..." >&4
    $cat >try.c <<'EOCP'
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>

#define SYRINX(x) __builtin_choose_expr( x, (1056*2), (103*50) )

int main(void) {
    assert( SYRINX(1) == 2112 );
    assert( SYRINX(1) != 5150 );
    assert( SYRINX(0) == 5150 );
    assert( SYRINX(0) != 2112 );
    puts( "All good!" );
    exit(0);
}

EOCP
    set try
    if eval $compile && $run ./try; then
	echo "Your C compiler supports __builtin_choose_expr."
	val="$define"
    else
	echo "Your C compiler doesn't seem to understand __builtin_choose_expr."
	val="$undef"
    fi
;;
*) val="$d_builtin_choose_expr" ;;
esac

set d_builtin_choose_expr
eval $setvar
$rm_try

: Look for GCC-style __builtin_expect
case "$d_builtin_expect" in
'')
    echo " "
    echo "Checking whether your compiler can handle __builtin_expect ..." >&4
    $cat >try.c <<'EOCP'
int main(void) {
    int n = 50;
    if ( __builtin_expect(n, 0) ) n = 1;
    /* Remember shell exit code truth is 0, C truth is non-zero */
    return !(n == 1);
}
EOCP
    set try
    if eval $compile && $run ./try; then
	echo "Your C compiler supports __builtin_expect."
	val="$define"
    else
	echo "Your C compiler doesn't seem to understand __builtin_expect."
	val="$undef"
    fi
    ;;
*) val="$d_builtin_expect" ;;
esac

set d_builtin_expect
eval $setvar
$rm_try

: see if the Compiler supports C99 variadic macros
echo "Checking for C99 variadic macros." >&4
$cat >try.c <<EOCP
#include <stdio.h>
#include <stdarg.h>

#define foo(buffer, format, ...) sprintf(buffer, format, __VA_ARGS__)

int main() {
  char buf[20];
  foo(buf, "%d %g %.*s", 123, 456.0, (int)3, "789fail");
  puts(buf);
  return 0;
}
EOCP
set try
if eval $compile && $run ./try 2>&1 >/dev/null; then
    case "`$run ./try`" in
	"123 456 789")
	echo "You have C99 variadic macros." >&4
	d_c99_variadic_macros="$define"
	;;
	*)
	echo "You don't have functional C99 variadic macros." >&4
	d_c99_variadic_macros="$undef"
	;;
    esac
else
    echo "I couldn't compile and run the test program, so I assume that you don't have functional C99 variadic macros." >&4
    d_c99_variadic_macros="$undef"
fi
$rm_try

: see if signal is declared as pointer to function returning int or void
echo " "
xxx=`./findhdr signal.h`
$test "$xxx" && $cppstdin $cppminus $cppflags < $xxx >$$.tmp 2>/dev/null
if $contains 'int.*\*[ 	]*signal' $$.tmp >/dev/null 2>&1 ; then
	echo "You have int (*signal())() instead of void." >&4
	val="$undef"
elif $contains 'void.*\*[ 	]*signal' $$.tmp >/dev/null 2>&1 ; then
	echo "You have void (*signal())()." >&4
	val="$define"
elif $contains 'extern[ 	]*[(\*]*signal' $$.tmp >/dev/null 2>&1 ; then
	echo "You have int (*signal())() instead of void." >&4
	val="$undef"
elif $contains 'void.*\*.*sig' $$.tmp >/dev/null 2>&1 ; then
	echo "You have void (*signal())()." >&4
	val="$define"
else
	case "$d_voidsig" in
	'')
	echo "I can't determine whether signal handler returns void or int..." >&4
		dflt=void
		rp="What type does your signal handler return?"
		. ./myread
		case "$ans" in
		v*) val="$define";;
		*) val="$undef";;
		esac;;
	"$define")
		echo "As you already told me, signal handler returns void." >&4
		val="$define"
		;;
	*)	echo "As you already told me, signal handler returns int." >&4
		val="$undef"
		;;
	esac
fi
set d_voidsig
eval $setvar
case "$d_voidsig" in
"$define") signal_t="void";;
*) signal_t="int";;
esac
$rm -f $$.tmp

: check for ability to cast large floats to 32-bit ints.
echo " "
echo 'Checking whether your C compiler can cast large floats to int32.' >&4
if $test "$intsize" -ge 4; then
	xxx=int
else
	xxx=long
fi
$cat >try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <sys/types.h>
#include <signal.h>
$signal_t blech(int s) { exit(3); }
int main()
{
	$xxx i32;
	double f, g;
	int result = 0;
	char str[16];
	signal(SIGFPE, blech);

	/* Don't let compiler optimize the test away.  Store the number
	   in a writable string for gcc to pass to sscanf under HP-UX.
	*/
	sprintf(str, "2147483647");
	sscanf(str, "%lf", &f); /* f = (double) 0x7fffffff; */
	g = 10 * f;
	i32  = ($xxx) g;

	/* x86 processors will probably give 0x8000 0000, which is a
	   sign change.  We don't want that.  We want to mimic SPARC
	   behavior here, which is to preserve the sign and give
	   back 0x7fff ffff.
	*/
	if (i32 != ($xxx) f)
		result |= 1;
	exit(result);
}
EOCP
set try
if eval $compile_ok; then
	$run ./try 2>/dev/null
	yyy=$?
else
	echo "(I can't seem to compile the test program--assuming it can't)"
	yyy=1
fi
case "$yyy" in
0)	val="$define"
	echo "Yup, it can."
	;;
*)	val="$undef"
	echo "Nope, it can't."
	;;
esac
set d_casti32
eval $setvar
$rm_try

: check for ability to cast negative floats to unsigned
echo " "
echo 'Checking whether your C compiler can cast negative float to unsigned.' >&4
$cat >try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <sys/types.h>
#include <signal.h>
$signal_t blech(int s) { exit(7); }
$signal_t blech_in_list(int s) { exit(4); }
unsigned long dummy_long(unsigned long p) { return p; }
unsigned int dummy_int(unsigned int p) { return p; }
unsigned short dummy_short(unsigned short p) { return p; }
int main()
{
	double f;
	unsigned long along;
	unsigned int aint;
	unsigned short ashort;
	int result = 0;
	char str[16];

	/* Frustrate gcc-2.7.2's optimizer which failed this test with
	   a direct f = -123. assignment.  gcc-2.8.0 reportedly
	   optimized the whole file away
	*/
	/* Store the number in a writable string for gcc to pass to
	   sscanf under HP-UX.
	*/
	sprintf(str, "-123");
	sscanf(str, "%lf", &f);  /* f = -123.; */

	signal(SIGFPE, blech);
	along = (unsigned long)f;
	aint = (unsigned int)f;
	ashort = (unsigned short)f;
	if (along != (unsigned long)-123)
		result |= 1;
	if (aint != (unsigned int)-123)
		result |= 1;
	if (ashort != (unsigned short)-123)
		result |= 1;
	sprintf(str, "1073741824.");
	sscanf(str, "%lf", &f); /* f = (double)0x40000000; */
	f = f + f;
	along = 0;
	along = (unsigned long)f;
	if (along != 0x80000000)
		result |= 2;
	f -= 1.;
	along = 0;
	along = (unsigned long)f;
	if (along != 0x7fffffff)
		result |= 1;
	f += 2.;
	along = 0;
	along = (unsigned long)f;
	if (along != 0x80000001)
		result |= 2;
	if (result)
		exit(result);
	signal(SIGFPE, blech_in_list);
	sprintf(str, "123.");
	sscanf(str, "%lf", &f);  /* f = 123.; */
	along = dummy_long((unsigned long)f);
	aint = dummy_int((unsigned int)f);
	ashort = dummy_short((unsigned short)f);
	if (along != (unsigned long)123)
		result |= 4;
	if (aint != (unsigned int)123)
		result |= 4;
	if (ashort != (unsigned short)123)
		result |= 4;
	exit(result);

}
EOCP
set try
if eval $compile_ok; then
	$run ./try 2>/dev/null
	castflags=$?
else
	echo "(I can't seem to compile the test program--assuming it can't)"
	castflags=7
fi
case "$castflags" in
0)	val="$define"
	echo "Yup, it can."
	;;
*)	val="$undef"
	echo "Nope, it can't."
	;;
esac
set d_castneg
eval $setvar
$rm_try

: see if cbrt exists
set cbrt d_cbrt
eval $inlibc

: see if chown exists
set chown d_chown
eval $inlibc

: see if chroot exists
set chroot d_chroot
eval $inlibc

: see if chsize exists
set chsize d_chsize
eval $inlibc

: see if class exists
set class d_class
eval $inlibc

: see if clearenv exists
set clearenv d_clearenv
eval $inlibc

: Define hasstruct macro for Configure internal use
hasstruct='varname=$1; struct=$2; shift; shift;
while $test $# -ge 2; do
	case "$1" in
	$define) echo "#include <$2>";;
	esac ;
    shift 2;
done > try.c;
echo "int main () { struct $struct foo; }" >> try.c;
set try;
if eval $compile; then
	val="$define";
else
	val="$undef";
fi;
set $varname;
eval $setvar;
$rm_try'

: see whether socket exists
socketlib=''
sockethdr=''
echo " "
$echo $n "Hmm... $c" >&4
if set socket val -f d_socket; eval $csym; $val; then
    echo "Looks like you have Berkeley networking support." >&4
    d_socket="$define"
    if set setsockopt val -f; eval $csym; $val; then
	d_oldsock="$undef"
    else
	echo "...but it uses the old BSD 4.1c interface, rather than 4.2." >&4
	d_oldsock="$define"
    fi
else
    if $contains socklib libc.list >/dev/null 2>&1; then
	echo "Looks like you have Berkeley networking support." >&4
	d_socket="$define"
	: we will have to assume that it supports the 4.2 BSD interface
	d_oldsock="$undef"
    else
	echo "You don't have Berkeley networking in libc$_a..." >&4
	if test "X$d_socket" = "X$define"; then
	    echo "...but you seem to believe that you have sockets." >&4
	else
	    for net in net socket
	    do
		if test -f $sysroot/usr/lib/lib$net$_a; then
		    ( ($nm $nm_opt $sysroot/usr/lib/lib$net$_a | eval $nm_extract) ||  \
		    $ar t $sysroot/usr/lib/lib$net$_a) 2>/dev/null >> libc.list
		    if $contains socket libc.list >/dev/null 2>&1; then
			d_socket="$define"
			socketlib="-l$net"
			case "$net" in
			net)
			    echo "...but the Wollongong group seems to have hacked it in." >&4
			    sockethdr="-I$sysroot/usr/netinclude"
			    ;;
			esac
			echo "Found Berkeley sockets interface in lib$net." >&4
			if $contains setsockopt libc.list >/dev/null 2>&1; then
			    d_oldsock="$undef"
			else
			    echo "...using the old BSD 4.1c interface, rather than 4.2." >&4
			    d_oldsock="$define"
			fi
			break
		    fi
		fi
	    done
	    if test "X$d_socket" != "X$define"; then
	       echo "or anywhere else I see." >&4
	       d_socket="$undef"
	       d_oldsock="$undef"
	    fi
	fi
    fi
fi

: see if socketpair exists
set socketpair d_sockpair
eval $inlibc


echo "Checking the availability sa_len in the sock struct ..." >&4
$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
int main() {
struct sockaddr sa;
return (sa.sa_len);
}
EOF
val="$undef"
set try; if eval $compile; then
    val="$define"
fi
set d_sockaddr_sa_len; eval $setvar
$rm_try

echo "Checking the availability struct sockaddr_in6 ..." >&4
$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main() {
struct sockaddr_in6 sin6;
return (sin6.sin6_family);
}
EOF
val="$undef"
set try; if eval $compile; then
    val="$define"
fi
set d_sockaddr_in6; eval $setvar
$rm_try

echo "Checking the availability struct sockaddr_storage ..." >&4
$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main() {
struct sockaddr_storage sastor;
return (sastor.ss_family);
}
EOF
val="$undef"
set try; if eval $compile; then
    val="$define"
fi
set d_sockaddr_storage; eval $setvar
$rm_try

echo "Checking the availability sin6_scope_id in struct sockaddr_in6 ..." >&4
$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main() {
struct sockaddr_in6 sin6;
return (sin6.sin6_scope_id);
}
EOF
val="$undef"
set try; if eval $compile; then
    val="$define"
fi
set d_sin6_scope_id; eval $setvar
$rm_try

echo "Checking the availability struct ip_mreq ..." >&4
$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main() {
struct ip_mreq mreq;
return (mreq.imr_multiaddr.s_addr);
}
EOF
val="$undef"
set try; if eval $compile; then
       val="$define"
fi
set d_ip_mreq; eval $setvar
$rm_try

echo "Checking the availability struct ip_mreq_source ..." >&4
$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main() {
struct ip_mreq_source mreq;
return (mreq.imr_multiaddr.s_addr);
}
EOF
val="$undef"
set try; if eval $compile; then
       val="$define"
fi
set d_ip_mreq_source; eval $setvar
$rm_try

echo "Checking the availability struct ipv6_mreq ..." >&4
$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main() {
struct ipv6_mreq mreq;
return (mreq.ipv6mr_interface);
}
EOF
val="$undef"
set try; if eval $compile; then
    val="$define"
fi
set d_ipv6_mreq; eval $setvar
$rm_try

echo "Checking the availability struct ipv6_mreq_source ..." >&4
$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int main() {
struct ipv6_mreq_source mreq;
return (mreq.imr_multiaddr.s_addr);
}
EOF
val="$undef"
set try; if eval $compile; then
       val="$define"
fi
set d_ipv6_mreq_source; eval $setvar
$rm_try

echo "Checking the availability of certain socket constants..." >&4
for ENUM in MSG_CTRUNC MSG_DONTROUTE MSG_OOB MSG_PEEK MSG_PROXY SCM_RIGHTS; do
    enum=`$echo $ENUM|./tr '[A-Z]' '[a-z]'`
    $cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
int main() {
    int i = $ENUM;
}
EOF
    val="$undef"
    set try; if eval $compile; then
	val="$define"
    fi
    set d_${enum}; eval $setvar
    $rm_try
done

: see if this is a sys/uio.h system
set sys/uio.h i_sysuio
eval $inhdr

: Check for cmsghdr support
echo " "
echo "Checking to see if your system supports struct cmsghdr..." >&4
set d_cmsghdr_s cmsghdr $i_systypes sys/types.h $d_socket sys/socket.h $i_sysuio sys/uio.h
eval $hasstruct
case "$d_cmsghdr_s" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac

: see if copysign exists
set copysign d_copysign
eval $inlibc

: see if copysignl exists
set copysignl d_copysignl
eval $inlibc

: see if crypt exists
echo " "
set crypt d_crypt
eval $inlibc
case "$d_crypt" in
$define) cryptlib='' ;;
*)	if set crypt val -f d_crypt; eval $csym; $val; then
		echo 'crypt() found.' >&4
		val="$define"
		cryptlib=''
	else
		cryptlib=`./loc Slibcrypt$_a "" $xlibpth`
		if $test -z "$cryptlib"; then
			cryptlib=`./loc Mlibcrypt$_a "" $xlibpth`
		else
			cryptlib=-lcrypt
		fi
		if $test -z "$cryptlib"; then
			cryptlib=`./loc Llibcrypt$_a "" $xlibpth`
		else
			cryptlib=-lcrypt
		fi
		if $test -z "$cryptlib"; then
			cryptlib=`./loc libcrypt$_a "" $libpth`
		else
			cryptlib=-lcrypt
		fi
		if $test -z "$cryptlib"; then
			echo 'crypt() NOT found.' >&4
			val="$undef"
		else
			val="$define"
		fi
	fi
	set d_crypt
	eval $setvar
	;;
esac

: see if this is a crypt.h system
set crypt.h i_crypt
eval $inhdr

: see if crypt_r exists
set crypt_r d_crypt_r
eval $inlibc
case "$d_crypt_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_crypt crypt.h"
	case "$d_crypt_r_proto:$usethreads" in
	":define")	d_crypt_r_proto=define
		set d_crypt_r_proto crypt_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_crypt_r_proto" in
	define)
	case "$crypt_r_proto" in
	''|0) try='char* crypt_r(const char*, const char*, struct crypt_data*);'
	./protochk "$extern_C $try" $hdrs && crypt_r_proto=B_CCS ;;
	esac
	case "$crypt_r_proto" in
	''|0) try='char* crypt_r(const char*, const char*, CRYPTD*);'
	./protochk "$extern_C $try" $hdrs && crypt_r_proto=B_CCD ;;
	esac
	case "$crypt_r_proto" in
	''|0)	d_crypt_r=undef
		crypt_r_proto=0
		echo "Disabling crypt_r, cannot determine prototype." >&4 ;;
	* )	case "$crypt_r_proto" in
		REENTRANT_PROTO*) ;;
		*) crypt_r_proto="REENTRANT_PROTO_$crypt_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "crypt_r has no prototype, not using it." >&4 ;;
		esac
		d_crypt_r=undef
		crypt_r_proto=0
		;;
	esac
	;;
*)	crypt_r_proto=0
	;;
esac

: get csh whereabouts
case "$csh" in
'csh') val="$undef" ;;
*) val="$define" ;;
esac
set d_csh
eval $setvar
: Respect a hint or command line value for full_csh.
case "$full_csh" in
'') full_csh=$csh ;;
esac

: see if ctermid exists
set ctermid d_ctermid
eval $inlibc

: see if ctermid_r exists
set ctermid_r d_ctermid_r
eval $inlibc
case "$d_ctermid_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h "
	case "$d_ctermid_r_proto:$usethreads" in
	":define")	d_ctermid_r_proto=define
		set d_ctermid_r_proto ctermid_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_ctermid_r_proto" in
	define)
	case "$ctermid_r_proto" in
	''|0) try='char* ctermid_r(char*);'
	./protochk "$extern_C $try" $hdrs && ctermid_r_proto=B_B ;;
	esac
	case "$ctermid_r_proto" in
	''|0)	d_ctermid_r=undef
		ctermid_r_proto=0
		echo "Disabling ctermid_r, cannot determine prototype." >&4 ;;
	* )	case "$ctermid_r_proto" in
		REENTRANT_PROTO*) ;;
		*) ctermid_r_proto="REENTRANT_PROTO_$ctermid_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "ctermid_r has no prototype, not using it." >&4 ;;
		esac
		d_ctermid_r=undef
		ctermid_r_proto=0
		;;
	esac
	;;
*)	ctermid_r_proto=0
	;;
esac

: see if ctime_r exists
set ctime_r d_ctime_r
eval $inlibc
case "$d_ctime_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_time time.h $i_systime sys/time.h"
	case "$d_ctime_r_proto:$usethreads" in
	":define")	d_ctime_r_proto=define
		set d_ctime_r_proto ctime_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_ctime_r_proto" in
	define)
	case "$ctime_r_proto" in
	''|0) try='char* ctime_r(const time_t*, char*);'
	./protochk "$extern_C $try" $hdrs && ctime_r_proto=B_SB ;;
	esac
	case "$ctime_r_proto" in
	''|0) try='char* ctime_r(const time_t*, char*, int);'
	./protochk "$extern_C $try" $hdrs && ctime_r_proto=B_SBI ;;
	esac
	case "$ctime_r_proto" in
	''|0) try='int ctime_r(const time_t*, char*);'
	./protochk "$extern_C $try" $hdrs && ctime_r_proto=I_SB ;;
	esac
	case "$ctime_r_proto" in
	''|0) try='int ctime_r(const time_t*, char*, int);'
	./protochk "$extern_C $try" $hdrs && ctime_r_proto=I_SBI ;;
	esac
	case "$ctime_r_proto" in
	''|0)	d_ctime_r=undef
		ctime_r_proto=0
		echo "Disabling ctime_r, cannot determine prototype." >&4 ;;
	* )	case "$ctime_r_proto" in
		REENTRANT_PROTO*) ;;
		*) ctime_r_proto="REENTRANT_PROTO_$ctime_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "ctime_r has no prototype, not using it." >&4 ;;
		esac
		d_ctime_r=undef
		ctime_r_proto=0
		;;
	esac
	;;
*)	ctime_r_proto=0
	;;
esac

: see if cuserid exists
set cuserid d_cuserid
eval $inlibc

: see if dbm.h is available
: see if dbmclose exists
set dbmclose d_dbmclose
eval $inlibc

case "$d_dbmclose" in
$define)
	set dbm.h i_dbm
	eval $inhdr
	case "$i_dbm" in
	$define)
		val="$undef"
		set i_rpcsvcdbm
		eval $setvar
		;;
	*)	set rpcsvc/dbm.h i_rpcsvcdbm
		eval $inhdr
		;;
	esac
	;;
*)	echo "We won't be including <dbm.h>"
	val="$undef"
	set i_dbm
	eval $setvar
	val="$undef"
	set i_rpcsvcdbm
	eval $setvar
	;;
esac

: see if prototype for dbminit is available
echo " "
set d_dbminitproto dbminit $i_dbm dbm.h
eval $hasproto

: see if difftime exists
set difftime d_difftime
eval $inlibc

: see if this is a dirent system
echo " "
if xinc=`./findhdr dirent.h`; $test "$xinc"; then
	val="$define"
	echo "<dirent.h> found." >&4
else
	val="$undef"
	if xinc=`./findhdr sys/dir.h`; $test "$xinc"; then
		echo "<sys/dir.h> found." >&4
		echo " "
	else
		xinc=`./findhdr sys/ndir.h`
	fi
	echo "<dirent.h> NOT found." >&4
fi
set i_dirent
eval $setvar

: Look for type of directory structure.
echo " "
$cppstdin $cppflags $cppminus < "$xinc" > try.c

case "$direntrytype" in
''|' ')
	case "$i_dirent" in
	$define) guess1='struct dirent' ;;
	*) guess1='struct direct'  ;;
	esac
	;;
*)	guess1="$direntrytype"
	;;
esac

case "$guess1" in
'struct dirent') guess2='struct direct' ;;
*) guess2='struct dirent' ;;
esac

if $contains "$guess1" try.c >/dev/null 2>&1; then
	direntrytype="$guess1"
	echo "Your directory entries are $direntrytype." >&4
elif $contains "$guess2" try.c >/dev/null 2>&1; then
	direntrytype="$guess2"
	echo "Your directory entries seem to be $direntrytype." >&4
else
	echo "I don't recognize your system's directory entries." >&4
	rp="What type is used for directory entries on this system?"
	dflt="$guess1"
	. ./myread
	direntrytype="$ans"
fi
$rm_try

: see if the directory entry stores field length
echo " "
$cppstdin $cppflags $cppminus < "$xinc" > try.c
if $contains 'd_namlen' try.c >/dev/null 2>&1; then
	echo "Good, your directory entry keeps length information in d_namlen." >&4
	val="$define"
else
	echo "Your directory entry does not know about the d_namlen field." >&4
	val="$undef"
fi
set d_dirnamlen
eval $setvar
$rm_try

: Look for DIR.dd_fd
case "$i_dirent" in
"$define")
    echo "Checking to see if DIR has a dd_fd member variable" >&4
    $cat >try.c <<EOCP
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <dirent.h>

int main() {
    DIR dir;
    dir.dd_fd = 1;
    return 0;
}
EOCP
    val=$undef
    set try
    if eval $compile; then
        echo "Yes, it does."
        val="$define"
    else
        echo "No, it does not."
        val="$undef"
    fi
    ;;
*)
    echo "You don't have a <dirent.h>, so not checking for dd_fd." >&4
    val="$undef"
    ;;
esac
set d_dir_dd_fd
eval $setvar
$rm_try

: see if this is an sysdir system
set sys/dir.h i_sysdir
eval $inhdr

: see if this is an sysndir system
set sys/ndir.h i_sysndir
eval $inhdr

: Look for dirfd
echo " "
$cat >dirfd.c <<EOM
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_dirent I_DIRENT		/**/
#$i_sysdir I_SYS_DIR		/**/
#$i_sysndir I_SYS_NDIR		/**/
#$i_systypes I_SYS_TYPES	/**/
#if defined(I_SYS_TYPES)
#include <sys/types.h>
#endif
#if defined(I_DIRENT)
#include <dirent.h>
#else
#ifdef I_SYS_NDIR
#include <sys/ndir.h>
#else
#ifdef I_SYS_DIR
#include <sys/dir.h>
#endif
#endif
#endif
int main() {
	DIR *dirp = opendir(".");
	if (dirfd(dirp) >= 0)
		exit(0);
	else
		exit(1);
}
EOM
val=$undef
set dirfd
if eval $compile; then
	val="$define"
fi
case "$val" in
$define)	echo "dirfd() found." >&4	;;
*)		echo "dirfd() NOT found." >&4	;;
esac
set d_dirfd
eval $setvar
$rm -f dirfd*

: see if dladdr exists
set dladdr d_dladdr
eval $inlibc

: see if dlerror exists
xxx_runnm="$runnm"
runnm=false
set dlerror d_dlerror
eval $inlibc
runnm="$xxx_runnm"

: see if dlfcn is available
set dlfcn.h i_dlfcn
eval $inhdr

: Check what extension to use for shared libs
case "$usedl" in
$define|y|true)
	$cat << EOM

On a few systems, the dynamically loaded modules that perl generates and uses
will need a different extension than shared libs. The default will probably
be appropriate.

EOM
	case "$dlext" in
	'')	dflt="$so" ;;
	*)	dflt="$dlext" ;;
	esac
	rp='What is the extension of dynamically loaded modules'
	. ./myread
	dlext="$ans"
	;;
*)
	dlext="none"
	;;
esac

: Check if dlsym need a leading underscore
echo " "
val="$undef"

case "$dlsrc" in
dl_dlopen.xs)
	echo "Checking whether your dlsym() needs a leading underscore ..." >&4
	$cat >dyna.c <<'EOM'
void fred (void) { }
EOM

$cat >fred.c<<EOM

#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_dlfcn I_DLFCN
#ifdef I_DLFCN
#include <dlfcn.h>      /* the dynamic linker include file for SunOS/Solaris */
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif

extern void fred(void) ;

int main()
{
    void * handle ;
    void * symbol ;
#ifndef RTLD_LAZY
    int mode = 1 ;
#else
    int mode = RTLD_LAZY ;
#endif
    handle = dlopen("./dyna.$dlext", mode) ;
    if (handle == NULL) {
	printf ("1\n") ;
	fflush (stdout) ;
	exit(0);
    }
    symbol = dlsym(handle, "fred") ;
    if (symbol == NULL) {
	/* try putting a leading underscore */
	symbol = dlsym(handle, "_fred") ;
	if (symbol == NULL) {
	    printf ("2\n") ;
	    fflush (stdout) ;
	    exit(0);
	}
	printf ("3\n") ;
    }
    else
	printf ("4\n") ;
    fflush (stdout) ;
    exit(0);
}
EOM
	: Call the object file tmp-dyna.o in case dlext=o.
	if $cc $ccflags $cccdlflags -c dyna.c > /dev/null 2>&1 &&
		mv dyna${_o} tmp-dyna${_o} > /dev/null 2>&1 &&
		$ld -o dyna.$dlext $ldflags $lddlflags tmp-dyna${_o} > /dev/null 2>&1 &&
		$cc -o fred $ccflags $ldflags $cccdlflags $ccdlflags fred.c $libs > /dev/null 2>&1 && $to dyna.$dlext; then
		xxx=`$run ./fred`
		case $xxx in
		1)	echo "Test program failed using dlopen." >&4
			echo "Perhaps you should not use dynamic loading." >&4;;
		2)	echo "Test program failed using dlsym." >&4
			echo "Perhaps you should not use dynamic loading." >&4;;
		3)	echo "dlsym needs a leading underscore" >&4
			val="$define" ;;
		4)	echo "dlsym doesn't need a leading underscore." >&4;;
		esac
	else
		echo "I can't compile and run the test program." >&4
                echo "I'm guessing that dlsym doesn't need a leading underscore." >&4
	fi
	;;
esac

$rm -f fred fred.* dyna.$dlext dyna.* tmp-dyna.*

set d_dlsymun
eval $setvar

: see if drand48_r exists
set drand48_r d_drand48_r
eval $inlibc
case "$d_drand48_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_stdlib stdlib.h"
	case "$d_drand48_r_proto:$usethreads" in
	":define")	d_drand48_r_proto=define
		set d_drand48_r_proto drand48_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_drand48_r_proto" in
	define)
	case "$drand48_r_proto" in
	''|0) try='int drand48_r(struct drand48_data*, double*);'
	./protochk "$extern_C $try" $hdrs && drand48_r_proto=I_ST ;;
	esac
	case "$drand48_r_proto" in
	''|0)	d_drand48_r=undef
		drand48_r_proto=0
		echo "Disabling drand48_r, cannot determine prototype." >&4 ;;
	* )	case "$drand48_r_proto" in
		REENTRANT_PROTO*) ;;
		*) drand48_r_proto="REENTRANT_PROTO_$drand48_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "drand48_r has no prototype, not using it." >&4 ;;
		esac
		d_drand48_r=undef
		drand48_r_proto=0
		;;
	esac
	;;
*)	drand48_r_proto=0
	;;
esac

: see if prototype for drand48 is available
echo " "
set d_drand48proto drand48 $i_stdlib stdlib.h $i_unistd unistd.h
eval $hasproto

: see if dup2 exists
set dup2 d_dup2
eval $inlibc

: see if dup3 exists
set dup3 d_dup3
eval $inlibc

: see if localeconv_l exists
set localeconv_l d_localeconv_l
eval $inlibc

: see if this is an xlocale.h system
set xlocale.h i_xlocale
eval $inhdr

: see if newlocale exists
set newlocale d_newlocale
eval $inlibc

: see if freelocale exists
set freelocale d_freelocale
eval $inlibc

: see if uselocale exists
set uselocale d_uselocale
eval $inlibc

: see if duplocale exists
set duplocale d_duplocale
eval $inlibc

: see if querylocale exists
set querylocale d_querylocale
eval $inlibc

: if we have xlocale.h, check whether it is needed
case "$i_xlocale$d_newlocale$xlocale_needed" in
"$define$define")
	echo "Checking if xlocale.h is needed..." >&4
	$cat >try.c <<EOF
#include <locale.h>
#include <stdio.h>
#ifdef TRY_XLOCALE
#include <xlocale.h>
#endif
#$d_localeconv_l HAVE_LOCALECONV_L

#ifdef HAVE_LOCALECONV_L
struct lconv *(*lcptr)(locale_t) = localeconv_l;
#endif

int main(void) {
  locale_t lc = newlocale(LC_ALL_MASK, "C", (locale_t)0);

#ifdef HAVE_LOCALECONV_L
  /* FreeBSD hides only localeconv_l() in xlocale.h */
  struct lconv *lcbuf = localeconv_l(lc);
  printf("decimal: %s\n", lcbuf->decimal_point);
#endif

  freelocale(lc);
  return 0;
}
EOF
	set try
	if eval $compile && $run ./try > /dev/null 2>&1 ; then
		echo "xlocale.h isn't needed" >&4
		xlocale_needed=$undef
	else
		set try -DTRY_XLOCALE
		if eval $compile && $run ./try > /dev/null 2>&1 ; then
			xlocale_needed=$define
			echo "xlocale.h is needed" >&4
		else
			echo "I can't build my test either way" >&4
			xlocale_needed=$undef
		fi
	fi
	$rm_try
	;;
*) xlocale_needed=$undef ;;
esac

: see if eaccess exists
set eaccess d_eaccess
eval $inlibc

: see if endgrent exists
set endgrent d_endgrent
eval $inlibc

: see if this is an grp system
set grp.h i_grp
eval $inhdr

case "$i_grp" in
$define)
	xxx=`./findhdr grp.h`
	$cppstdin $cppflags $cppminus < $xxx >$$.h

	if $contains 'gr_passwd' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_grpasswd
	eval $setvar

	$rm -f $$.h
	;;
*)
	val="$undef";
	set d_grpasswd; eval $setvar
	;;
esac

: see if endgrent_r exists
set endgrent_r d_endgrent_r
eval $inlibc
case "$d_endgrent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_grp grp.h"
	case "$d_endgrent_r_proto:$usethreads" in
	":define")	d_endgrent_r_proto=define
		set d_endgrent_r_proto endgrent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_endgrent_r_proto" in
	define)
	case "$endgrent_r_proto" in
	''|0) try='int endgrent_r(FILE**);'
	./protochk "$extern_C $try" $hdrs && endgrent_r_proto=I_H ;;
	esac
	case "$endgrent_r_proto" in
	''|0) try='void endgrent_r(FILE**);'
	./protochk "$extern_C $try" $hdrs && endgrent_r_proto=V_H ;;
	esac
	case "$endgrent_r_proto" in
	''|0)	d_endgrent_r=undef
		endgrent_r_proto=0
		echo "Disabling endgrent_r, cannot determine prototype." >&4 ;;
	* )	case "$endgrent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) endgrent_r_proto="REENTRANT_PROTO_$endgrent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "endgrent_r has no prototype, not using it." >&4 ;;
		esac
		d_endgrent_r=undef
		endgrent_r_proto=0
		;;
	esac
	;;
*)	endgrent_r_proto=0
	;;
esac

: see if endhostent exists
set endhostent d_endhent
eval $inlibc

: see if this is a netdb.h system
set netdb.h i_netdb
eval $inhdr

: see if endhostent_r exists
set endhostent_r d_endhostent_r
eval $inlibc
case "$d_endhostent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_endhostent_r_proto:$usethreads" in
	":define")	d_endhostent_r_proto=define
		set d_endhostent_r_proto endhostent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_endhostent_r_proto" in
	define)
	case "$endhostent_r_proto" in
	''|0) try='int endhostent_r(struct hostent_data*);'
	./protochk "$extern_C $try" $hdrs && endhostent_r_proto=I_D ;;
	esac
	case "$endhostent_r_proto" in
	''|0) try='void endhostent_r(struct hostent_data*);'
	./protochk "$extern_C $try" $hdrs && endhostent_r_proto=V_D ;;
	esac
	case "$endhostent_r_proto" in
	''|0)	d_endhostent_r=undef
		endhostent_r_proto=0
		echo "Disabling endhostent_r, cannot determine prototype." >&4 ;;
	* )	case "$endhostent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) endhostent_r_proto="REENTRANT_PROTO_$endhostent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "endhostent_r has no prototype, not using it." >&4 ;;
		esac
		d_endhostent_r=undef
		endhostent_r_proto=0
		;;
	esac
	;;
*)	endhostent_r_proto=0
	;;
esac

: see if endnetent exists
set endnetent d_endnent
eval $inlibc

: see if endnetent_r exists
set endnetent_r d_endnetent_r
eval $inlibc
case "$d_endnetent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_endnetent_r_proto:$usethreads" in
	":define")	d_endnetent_r_proto=define
		set d_endnetent_r_proto endnetent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_endnetent_r_proto" in
	define)
	case "$endnetent_r_proto" in
	''|0) try='int endnetent_r(struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && endnetent_r_proto=I_D ;;
	esac
	case "$endnetent_r_proto" in
	''|0) try='void endnetent_r(struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && endnetent_r_proto=V_D ;;
	esac
	case "$endnetent_r_proto" in
	''|0)	d_endnetent_r=undef
		endnetent_r_proto=0
		echo "Disabling endnetent_r, cannot determine prototype." >&4 ;;
	* )	case "$endnetent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) endnetent_r_proto="REENTRANT_PROTO_$endnetent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "endnetent_r has no prototype, not using it." >&4 ;;
		esac
		d_endnetent_r=undef
		endnetent_r_proto=0
		;;
	esac
	;;
*)	endnetent_r_proto=0
	;;
esac

: see if endprotoent exists
set endprotoent d_endpent
eval $inlibc

: see if endprotoent_r exists
set endprotoent_r d_endprotoent_r
eval $inlibc
case "$d_endprotoent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_endprotoent_r_proto:$usethreads" in
	":define")	d_endprotoent_r_proto=define
		set d_endprotoent_r_proto endprotoent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_endprotoent_r_proto" in
	define)
	case "$endprotoent_r_proto" in
	''|0) try='int endprotoent_r(struct protoent_data*);'
	./protochk "$extern_C $try" $hdrs && endprotoent_r_proto=I_D ;;
	esac
	case "$endprotoent_r_proto" in
	''|0) try='void endprotoent_r(struct protoent_data*);'
	./protochk "$extern_C $try" $hdrs && endprotoent_r_proto=V_D ;;
	esac
	case "$endprotoent_r_proto" in
	''|0)	d_endprotoent_r=undef
		endprotoent_r_proto=0
		echo "Disabling endprotoent_r, cannot determine prototype." >&4 ;;
	* )	case "$endprotoent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) endprotoent_r_proto="REENTRANT_PROTO_$endprotoent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "endprotoent_r has no prototype, not using it." >&4 ;;
		esac
		d_endprotoent_r=undef
		endprotoent_r_proto=0
		;;
	esac
	;;
*)	endprotoent_r_proto=0
	;;
esac

: see if endpwent exists
set endpwent d_endpwent
eval $inlibc

: see if this is a pwd.h system
set pwd.h i_pwd
eval $inhdr

case "$i_pwd" in
$define)
	xxx=`./findhdr pwd.h`
	$cppstdin $cppflags $cppminus < $xxx >$$.h

	if $contains 'pw_quota' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwquota
	eval $setvar

	if $contains 'pw_age' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwage
	eval $setvar

	if $contains 'pw_change' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwchange
	eval $setvar

	if $contains 'pw_class' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwclass
	eval $setvar

	if $contains 'pw_expire' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwexpire
	eval $setvar

	if $contains 'pw_comment' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwcomment
	eval $setvar

	if $contains 'pw_gecos' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwgecos
	eval $setvar

	if $contains 'pw_passwd' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwpasswd
	eval $setvar

	$rm -f $$.h
	;;
*)
	val="$undef";
	set d_pwquota; eval $setvar
	set d_pwage; eval $setvar
	set d_pwchange; eval $setvar
	set d_pwclass; eval $setvar
	set d_pwexpire; eval $setvar
	set d_pwcomment; eval $setvar
	set d_pwgecos; eval $setvar
	set d_pwpasswd; eval $setvar
	;;
esac

: see if endpwent_r exists
set endpwent_r d_endpwent_r
eval $inlibc
case "$d_endpwent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_pwd pwd.h"
	case "$d_endpwent_r_proto:$usethreads" in
	":define")	d_endpwent_r_proto=define
		set d_endpwent_r_proto endpwent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_endpwent_r_proto" in
	define)
	case "$endpwent_r_proto" in
	''|0) try='int endpwent_r(FILE**);'
	./protochk "$extern_C $try" $hdrs && endpwent_r_proto=I_H ;;
	esac
	case "$endpwent_r_proto" in
	''|0) try='void endpwent_r(FILE**);'
	./protochk "$extern_C $try" $hdrs && endpwent_r_proto=V_H ;;
	esac
	case "$endpwent_r_proto" in
	''|0)	d_endpwent_r=undef
		endpwent_r_proto=0
		echo "Disabling endpwent_r, cannot determine prototype." >&4 ;;
	* )	case "$endpwent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) endpwent_r_proto="REENTRANT_PROTO_$endpwent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "endpwent_r has no prototype, not using it." >&4 ;;
		esac
		d_endpwent_r=undef
		endpwent_r_proto=0
		;;
	esac
	;;
*)	endpwent_r_proto=0
	;;
esac

: see if endservent exists
set endservent d_endsent
eval $inlibc

: see if endservent_r exists
set endservent_r d_endservent_r
eval $inlibc
case "$d_endservent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_endservent_r_proto:$usethreads" in
	":define")	d_endservent_r_proto=define
		set d_endservent_r_proto endservent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_endservent_r_proto" in
	define)
	case "$endservent_r_proto" in
	''|0) try='int endservent_r(struct servent_data*);'
	./protochk "$extern_C $try" $hdrs && endservent_r_proto=I_D ;;
	esac
	case "$endservent_r_proto" in
	''|0) try='void endservent_r(struct servent_data*);'
	./protochk "$extern_C $try" $hdrs && endservent_r_proto=V_D ;;
	esac
	case "$endservent_r_proto" in
	''|0)	d_endservent_r=undef
		endservent_r_proto=0
		echo "Disabling endservent_r, cannot determine prototype." >&4 ;;
	* )	case "$endservent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) endservent_r_proto="REENTRANT_PROTO_$endservent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "endservent_r has no prototype, not using it." >&4 ;;
		esac
		d_endservent_r=undef
		endservent_r_proto=0
		;;
	esac
	;;
*)	endservent_r_proto=0
	;;
esac

: Locate the flags for 'open()'
echo " "
$cat >try.c <<EOCP
#include <sys/types.h>
#ifdef I_FCNTL
#include <fcntl.h>
#endif
#ifdef I_SYS_FILE
#include <sys/file.h>
#endif
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
	if(O_RDONLY);
#ifdef O_TRUNC
	exit(0);
#else
	exit(1);
#endif
}
EOCP
: check sys/file.h first to get FREAD on Sun
if $test `./findhdr sys/file.h` && \
		set try -DI_SYS_FILE && eval $compile; then
	h_sysfile=true;
	echo "<sys/file.h> defines the O_* constants..." >&4
	if $run ./try; then
		echo "and you have the 3 argument form of open()." >&4
		val="$define"
	else
		echo "but not the 3 argument form of open().  Oh, well." >&4
		val="$undef"
	fi
elif $test `./findhdr fcntl.h` && \
		set try -DI_FCNTL && eval $compile; then
	h_fcntl=true;
	echo "<fcntl.h> defines the O_* constants..." >&4
	if $run ./try; then
		echo "and you have the 3 argument form of open()." >&4
		val="$define"
	else
		echo "but not the 3 argument form of open().  Oh, well." >&4
		val="$undef"
	fi
else
	val="$undef"
	echo "I can't find the O_* constant definitions!  You got problems." >&4
fi
set d_open3
eval $setvar
$rm_try

: see if this is a sys/file.h system
val=''
set sys/file.h val
eval $inhdr

: do we need to include sys/file.h ?
case "$val" in
"$define")
	echo " "
	if $h_sysfile; then
		val="$define"
		echo "We'll be including <sys/file.h>." >&4
	else
		val="$undef"
		echo "We won't be including <sys/file.h>." >&4
	fi
	;;
*)
	h_sysfile=false
	;;
esac
set i_sysfile
eval $setvar

: see if fcntl.h is there
val=''
set fcntl.h val
eval $inhdr

: see if we can include fcntl.h
case "$val" in
"$define")
	echo " "
	if $h_fcntl; then
		val="$define"
		echo "We'll be including <fcntl.h>." >&4
	else
		val="$undef"
		if $h_sysfile; then
	echo "We don't need to include <fcntl.h> if we include <sys/file.h>." >&4
		else
			echo "We won't be including <fcntl.h>." >&4
		fi
	fi
	;;
*)
	h_fcntl=false
	val="$undef"
	;;
esac
set i_fcntl
eval $setvar

: see if fork exists
set fork d_fork
eval $inlibc

: see if pipe exists
set pipe d_pipe
eval $inlibc

: check for non-blocking I/O stuff
case "$h_sysfile" in
true) echo "#include <sys/file.h>" > head.c;;
*)
       case "$h_fcntl" in
       true) echo "#include <fcntl.h>" > head.c;;
       *) echo "#include <sys/fcntl.h>" > head.c;;
       esac
       ;;
esac
echo " "
echo "Figuring out the flag used by open() for non-blocking I/O..." >&4
case "$o_nonblock" in
'')
	$cat head.c > try.c
	$cat >>try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_fcntl I_FCNTL
#ifdef I_FCNTL
#include <fcntl.h>
#endif
int main() {
#ifdef O_NONBLOCK
	printf("O_NONBLOCK\n");
	exit(0);
#endif
#ifdef O_NDELAY
	printf("O_NDELAY\n");
	exit(0);
#endif
#ifdef FNDELAY
	printf("FNDELAY\n");
	exit(0);
#endif
	exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		o_nonblock=`$run ./try`
		case "$o_nonblock" in
		'') echo "I can't figure it out, assuming O_NONBLOCK will do.";;
		*) echo "Seems like we can use $o_nonblock.";;
		esac
	else
		echo "(I can't compile the test program; pray O_NONBLOCK is right!)"
	fi
	;;
*) echo "Using $hint value $o_nonblock.";;
esac
$rm_try

echo " "
echo "Let's see what value errno gets from read() on a $o_nonblock file..." >&4
case "$eagain" in
'')
	case "$d_fork:$d_pipe:$d_alarm" in
	define:define:define)
	$cat head.c > try.c
	$cat >>try.c <<EOCP
#include <errno.h>
#include <sys/types.h>
#include <signal.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_fcntl I_FCNTL
#ifdef I_FCNTL
#include <fcntl.h>
#endif
#define MY_O_NONBLOCK $o_nonblock
#ifndef errno  /* XXX need better Configure test */
extern int errno;
#endif
#$i_unistd I_UNISTD
#ifdef I_UNISTD
#include <unistd.h>
#endif
#include <string.h>
$signal_t blech(int x) { exit(3); }
EOCP
	$cat >> try.c <<'EOCP'
int main()
{
	int pd[2];
	int pu[2];
	char buf[1];
	char string[100];
	int ret;

	ret = pipe(pd);	/* Down: child -> parent */
	if (ret != 0)
		exit(3);
	ret = pipe(pu);	/* Up: parent -> child */
	if (ret != 0)
		exit(3);
	if (0 != fork()) {
		close(pd[1]);	/* Parent reads from pd[0] */
		close(pu[0]);	/* Parent writes (blocking) to pu[1] */
#ifdef F_SETFL
		if (-1 == fcntl(pd[0], F_SETFL, MY_O_NONBLOCK))
			exit(1);
#else
		exit(4);
#endif
		signal(SIGALRM, blech);
		alarm(5);
		if ((ret = read(pd[0], buf, 1)) > 0)	/* Nothing to read! */
			exit(2);
		sprintf(string, "%d\n", ret);
		ret = write(2, string, strlen(string));
		if (ret != strlen(string))
			exit(3);
		alarm(0);
#ifdef EAGAIN
		if (errno == EAGAIN) {
			printf("EAGAIN\n");
			goto ok;
		}
#endif
#ifdef EWOULDBLOCK
		if (errno == EWOULDBLOCK)
			printf("EWOULDBLOCK\n");
#endif
	ok:
		ret = write(pu[1], buf, 1);	/* Unblocks child, tell it to close our pipe */
		if (ret != 1)
			exit(3);
		sleep(2);				/* Give it time to close our pipe */
		alarm(5);
		ret = read(pd[0], buf, 1);	/* Should read EOF */
		alarm(0);
		sprintf(string, "%d\n", ret);
		ret = write(4, string, strlen(string));
		if (ret != strlen(string))
			exit(3);
		exit(0);
	}

	close(pd[0]);			/* We write to pd[1] */
	close(pu[1]);			/* We read from pu[0] */
	ret = read(pu[0], buf, 1);	/* Wait for parent to signal us we may continue */
	if (ret != 1)
		exit(3);
	close(pd[1]);			/* Pipe pd is now fully closed! */
	exit(0);				/* Bye bye, thank you for playing! */
}
EOCP
	set try
	if eval $compile_ok; then
		echo "$startsh" >mtry
		echo "$run ./try >try.out 2>try.ret 4>try.err || exit 4" >>mtry
		chmod +x mtry
		$run ./mtry >/dev/null 2>&1
		case $? in
		0) eagain=`$cat try.out`;;
		1) echo "Could not perform non-blocking setting!";;
		2) echo "I did a successful read() for something that was not there!";;
		3) echo "Hmm... non-blocking I/O does not seem to be working!";;
		4) echo "Could not find F_SETFL!";;
		*) echo "Something terribly wrong happened during testing.";;
		esac
		rd_nodata=`$cat try.ret`
		echo "A read() system call with no data present returns $rd_nodata."
		case "$rd_nodata" in
		0|-1) ;;
		*)
			echo "(That's peculiar, fixing that to be -1.)"
			rd_nodata=-1
			;;
		esac
		case "$eagain" in
		'')
			echo "Forcing errno EAGAIN on read() with no data available."
			eagain=EAGAIN
			;;
		*)
			echo "Your read() sets errno to $eagain when no data is available."
			;;
		esac
		status=`$cat try.err`
		case "$status" in
		0) echo "And it correctly returns 0 to signal EOF.";;
		-1) echo "But it also returns -1 to signal EOF, so be careful!";;
		*) echo "However, your read() returns '$status' on EOF??";;
		esac
		val="$define"
		if test "$status" = "$rd_nodata"; then
			echo "WARNING: you can't distinguish between EOF and no data!"
			val="$undef"
		fi
	else
		echo "I can't compile the test program--assuming errno EAGAIN will do."
		eagain=EAGAIN
	fi
	;;
	*)	echo "Can't figure out how to test this--assuming errno EAGAIN will do."
		eagain=EAGAIN
		val="$define"
		;;
	esac
	set d_eofnblk
	eval $setvar
	;;
*)
	echo "Using $hint value $eagain."
	echo "Your read() returns $rd_nodata when no data is present."
	case "$d_eofnblk" in
	"$define") echo "And you can see EOF because read() returns 0.";;
	"$undef") echo "But you can't see EOF status from read() returned value.";;
	*)
		echo "(Assuming you can't see EOF status from read anyway.)"
		d_eofnblk=$undef
		;;
	esac
	;;
esac
$rm_try head.c mtry

: see if erf exists
set erf d_erf
eval $inlibc

: see if erfc exists
set erfc d_erfc
eval $inlibc

: see if exp2 exists
set exp2 d_exp2
eval $inlibc

: see if expm1 exists
set expm1 d_expm1
eval $inlibc

: see if _ptr and _cnt from stdio act std
echo " "

if $contains '_lbfsize' `./findhdr stdio.h` >/dev/null 2>&1 ; then
	echo "(Looks like you have stdio.h from BSD.)"
	case "$stdio_ptr" in
	'') stdio_ptr='((fp)->_p)'
		ptr_lval=$define
		;;
	*)	ptr_lval=$d_stdio_ptr_lval;;
	esac
	case "$stdio_cnt" in
	'') stdio_cnt='((fp)->_r)'
		cnt_lval=$define
		;;
	*)	cnt_lval=$d_stdio_cnt_lval;;
	esac
	case "$stdio_base" in
	'') stdio_base='((fp)->_ub._base ? (fp)->_ub._base : (fp)->_bf._base)';;
	esac
	case "$stdio_bufsiz" in
	'') stdio_bufsiz='((fp)->_ub._base ? (fp)->_ub._size : (fp)->_bf._size)';;
	esac
elif $contains '_IO_fpos_t' `./findhdr stdio.h` `./findhdr libio.h` >/dev/null 2>&1 ; then
	echo "(Looks like you have stdio.h from Linux.)"
	case "$stdio_ptr" in
	'') stdio_ptr='((fp)->_IO_read_ptr)'
		ptr_lval=$define
		;;
	*)	ptr_lval=$d_stdio_ptr_lval;;
	esac
	case "$stdio_cnt" in
	'') stdio_cnt='((fp)->_IO_read_end - (fp)->_IO_read_ptr)'
		cnt_lval=$undef
		;;
	*)	cnt_lval=$d_stdio_cnt_lval;;
	esac
	case "$stdio_base" in
	'') stdio_base='((fp)->_IO_read_base)';;
	esac
	case "$stdio_bufsiz" in
	'') stdio_bufsiz='((fp)->_IO_read_end - (fp)->_IO_read_base)';;
	esac
else
	case "$stdio_ptr" in
	'') stdio_ptr='((fp)->_ptr)'
		ptr_lval=$define
		;;
	*)	ptr_lval=$d_stdio_ptr_lval;;
	esac
	case "$stdio_cnt" in
	'') stdio_cnt='((fp)->_cnt)'
		cnt_lval=$define
		;;
	*)	cnt_lval=$d_stdio_cnt_lval;;
	esac
	case "$stdio_base" in
	'') stdio_base='((fp)->_base)';;
	esac
	case "$stdio_bufsiz" in
	'') stdio_bufsiz='((fp)->_cnt + (fp)->_ptr - (fp)->_base)';;
	esac
fi

: test whether _ptr and _cnt really work
echo "Checking how std your stdio is..." >&4
$cat >try.c <<EOP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <string.h>
#define FILE_ptr(fp)	$stdio_ptr
#define FILE_cnt(fp)	$stdio_cnt
int main() {
	FILE *fp = fopen("try.c", "r");
	char c = getc(fp);
	if (
		18 <= FILE_cnt(fp) &&
		strncmp(FILE_ptr(fp), "include <stdio.h>\n", 18) == 0
	)
		exit(0);
	exit(1);
}
EOP
val="$undef"
set try
if eval $compile && $to try.c; then
	if $run ./try; then
		echo "Your stdio acts pretty std."
		val="$define"
	else
		echo "Your stdio isn't very std."
	fi
else
	echo "Your stdio doesn't appear very std."
fi
$rm_try

# glibc 2.2.90 and above apparently change stdio streams so Perl's
# direct buffer manipulation no longer works.  The Configure tests
# should be changed to correctly detect this, but until then,
# the following check should at least let perl compile and run.
# (This quick fix should be updated before 5.8.1.)
# To be defensive, reject all unknown versions, and all versions  > 2.2.9.
# A. Dougherty, June 3, 2002.
case "$d_gnulibc" in
$define)
	case "$gnulibc_version" in
	2.[01]*)  ;;
	2.2) ;;
	2.2.[0-9]) ;;
	*)  echo "But I will not snoop inside glibc $gnulibc_version stdio buffers."
		val="$undef"
		;;
	esac
	;;
esac
set d_stdstdio
eval $setvar

: Can _ptr be used as an lvalue?
case "$d_stdstdio$ptr_lval" in
$define$define) val=$define ;;
*) val=$undef ;;
esac
set d_stdio_ptr_lval
eval $setvar

: Can _cnt be used as an lvalue?
case "$d_stdstdio$cnt_lval" in
$define$define) val=$define ;;
*) val=$undef ;;
esac
set d_stdio_cnt_lval
eval $setvar


: test whether setting _ptr sets _cnt as a side effect
d_stdio_ptr_lval_sets_cnt="$undef"
d_stdio_ptr_lval_nochange_cnt="$undef"
case "$d_stdio_ptr_lval$d_stdstdio" in
$define$define)
	echo "Checking to see what happens if we set the stdio ptr..." >&4
$cat >try.c <<EOP
#include <stdio.h>
/* Can we scream? */
/* Eat dust sed :-) */
/* In the buffer space, no one can hear you scream. */
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#define FILE_ptr(fp)	$stdio_ptr
#define FILE_cnt(fp)	$stdio_cnt
#include <sys/types.h>
int main() {
	FILE *fp = fopen("try.c", "r");
	int c;
	char *ptr;
	size_t cnt;
	if (!fp) {
	    puts("Fail even to read");
	    exit(1);
	}
	c = getc(fp); /* Read away the first # */
	if (c == EOF) {
	    puts("Fail even to read");
	    exit(1);
	}
	if (!(
		18 <= FILE_cnt(fp) &&
		strncmp(FILE_ptr(fp), "include <stdio.h>\n", 18) == 0
	)) {
		puts("Fail even to read");
		exit (1);
	}
	ptr = (char*) FILE_ptr(fp);
	cnt = (size_t)FILE_cnt(fp);

	FILE_ptr(fp) += 42;

	if ((char*)FILE_ptr(fp) != (ptr + 42)) {
		printf("Fail ptr check %p != %p", FILE_ptr(fp), (ptr + 42));
		exit (1);
	}
	if (FILE_cnt(fp) <= 20) {
		printf ("Fail (<20 chars to test)");
		exit (1);
	}
	if (strncmp(FILE_ptr(fp), "Eat dust sed :-) */\n", 20) != 0) {
		puts("Fail compare");
		exit (1);
	}
	if (cnt == FILE_cnt(fp)) {
		puts("Pass_unchanged");
		exit (0);
	}
	if (FILE_cnt(fp) == (cnt - 42)) {
		puts("Pass_changed");
		exit (0);
	}
	printf("Fail count was %d now %d\n", cnt, FILE_cnt(fp));
	return 1;

}
EOP
	set try
	if eval $compile && $to try.c; then
		case `$run ./try` in
		Pass_changed)
			echo "Increasing ptr in your stdio decreases cnt by the same amount.  Good." >&4
			d_stdio_ptr_lval_sets_cnt="$define" ;;
		Pass_unchanged)
			echo "Increasing ptr in your stdio leaves cnt unchanged.  Good." >&4
			d_stdio_ptr_lval_nochange_cnt="$define" ;;
		Fail*)
			echo "Increasing ptr in your stdio didn't do exactly what I expected.  We'll not be doing that then." >&4 ;;
		*)
			echo "It appears attempting to set ptr in your stdio is a bad plan." >&4 ;;
	esac
	else
		echo "It seems we can't set ptr in your stdio.  Nevermind." >&4
	fi
	$rm_try
	;;
esac

: see if _base is also standard
val="$undef"
case "$d_stdstdio" in
$define)
	$cat >try.c <<EOP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#define FILE_base(fp)	$stdio_base
#define FILE_bufsiz(fp)	$stdio_bufsiz
int main() {
	FILE *fp = fopen("try.c", "r");
	char c = getc(fp);
	if (
		19 <= FILE_bufsiz(fp) &&
		strncmp(FILE_base(fp), "#include <stdio.h>\n", 19) == 0
	)
		exit(0);
	exit(1);
}
EOP
	set try
	if eval $compile && $to try.c; then
		if $run ./try; then
			echo "And its _base field acts std."
			val="$define"
		else
			echo "But its _base field isn't std."
		fi
	else
		echo "However, it seems to be lacking the _base field."
	fi
	$rm_try
	;;
esac
set d_stdiobase
eval $setvar

: see if fast_stdio exists
val="$undef"
case "$d_stdstdio:$d_stdio_ptr_lval" in
"$define:$define")
	case "$d_stdio_cnt_lval$d_stdio_ptr_lval_sets_cnt" in
	*$define*)
		echo "You seem to have 'fast stdio' to directly manipulate the stdio buffers." >&4
		val="$define"
		;;
	esac
	;;
esac
set d_faststdio
eval $setvar

: see if fchdir exists
set fchdir d_fchdir
eval $inlibc

: see if fchmod exists
set fchmod d_fchmod
eval $inlibc

: check for openat, unlinkat, renameat, linkat, fchmodat
set openat d_openat
eval $inlibc

set unlinkat d_unlinkat
eval $inlibc

set renameat d_renameat
eval $inlibc

set linkat d_linkat
eval $inlibc

set fchmodat d_fchmodat
eval $inlibc

: see if fchown exists
set fchown d_fchown
eval $inlibc

: see if this is an fcntl system
set fcntl d_fcntl
eval $inlibc

: See if fcntl-based locking works.
echo " "
$cat >try.c <<EOCP
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
$signal_t blech(int x) { exit(3); }
int main() {
#if defined(F_SETLK) && defined(F_SETLKW)
     struct flock flock;
     int retval, fd;
     fd = open("try.c", O_RDONLY);
     flock.l_type = F_RDLCK;
     flock.l_whence = SEEK_SET;
     flock.l_start = flock.l_len = 0;
     signal(SIGALRM, blech);
     alarm(10);
     retval = fcntl(fd, F_SETLK, &flock);
     close(fd);
     (retval < 0 ? exit(2) : exit(0));
#else
     exit(2);
#endif
}
EOCP
echo "Checking if fcntl-based file locking works... "
case "$d_fcntl" in
"$define")
	set try
	if eval $compile_ok; then
		if $run ./try; then
			echo "Yes, it seems to work."
			val="$define"
		else
			echo "Nope, it didn't work."
			val="$undef"
			case "$?" in
			3) $cat >&4 <<EOM
***
*** I had to forcibly timeout from fcntl(..., F_SETLK, ...).
*** This is (almost) impossible.
*** If your NFS lock daemons are not feeling well, something like
*** this may happen, please investigate.  Cannot continue, aborting.
***
EOM
				exit 1
				;;
			esac
		fi
	else
		echo "I'm unable to compile the test program, so I'll assume not."
		val="$undef"
	fi
	;;
*) val="$undef";
	echo "Nope, since you don't even have fcntl()."
	;;
esac
set d_fcntl_can_lock
eval $setvar
$rm_try

: check for fd_set items
$cat <<EOM

Checking to see how well your C compiler handles fd_set and friends ...
EOM
$cat >try.c <<EOCP
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_systime I_SYS_TIME
#$i_sysselct I_SYS_SELECT
#$d_socket HAS_SOCKET
#include <sys/types.h>
#ifdef HAS_SOCKET
#include <sys/socket.h> /* Might include <sys/bsdtypes.h> */
#endif
#ifdef I_SYS_TIME
#include <sys/time.h>
#endif
#ifdef I_SYS_SELECT
#include <sys/select.h>
#endif
int main() {
	fd_set fds;

#ifdef TRYBITS
	if(fds.fds_bits);
#endif

#if defined(FD_SET) && defined(FD_CLR) && defined(FD_ISSET) && defined(FD_ZERO)
	exit(0);
#else
	exit(1);
#endif
}
EOCP
set try -DTRYBITS
if eval $compile; then
	d_fds_bits="$define"
	d_fd_set="$define"
	echo "Well, your system knows about the normal fd_set typedef..." >&4
	if $run ./try; then
		echo "and you have the normal fd_set macros (just as I'd expect)." >&4
		d_fd_macros="$define"
	else
		$cat >&4 <<'EOM'
but not the normal fd_set macros!  Gaaack!  I'll have to cover for you.
EOM
		d_fd_macros="$undef"
	fi
else
	$cat <<'EOM'
Hmm, your compiler has some difficulty with fd_set.  Checking further...
EOM
	set try
	if eval $compile; then
		d_fds_bits="$undef"
		d_fd_set="$define"
		echo "Well, your system has some sort of fd_set available..." >&4
		if $run ./try; then
			echo "and you have the normal fd_set macros." >&4
			d_fd_macros="$define"
		else
			$cat <<'EOM'
but not the normal fd_set macros!  Gross!  More work for me...
EOM
			d_fd_macros="$undef"
		fi
	else
	echo "Well, you got zip.  That's OK, I can roll my own fd_set stuff." >&4
		d_fd_set="$undef"
		d_fds_bits="$undef"
		d_fd_macros="$undef"
	fi
fi
$rm_try

: see if fdclose exists
set fdclose d_fdclose
eval $inlibc

: see if fdim exists
set fdim d_fdim
eval $inlibc

: see if fdopendir exists
set fdopendir d_fdopendir
eval $inlibc

: see if fegetround exists
set fegetround d_fegetround
eval $inlibc

: see if ffs exists
set ffs d_ffs
eval $inlibc
: see if ffsl exists
set ffsl d_ffsl
eval $inlibc

: see if fgetpos exists
set fgetpos d_fgetpos
eval $inlibc

: see if finite exists
set finite d_finite
eval $inlibc

: see if finitel exists
set finitel d_finitel
eval $inlibc

: see if flock exists
set flock d_flock
eval $inlibc

: see if prototype for flock is available
echo " "
set d_flockproto flock $i_sysfile sys/file.h
eval $hasproto

: see if fma exists
set fma d_fma
eval $inlibc

: see if fmax exists
set fmax d_fmax
eval $inlibc

: see if fmin exists
set fmin d_fmin
eval $inlibc

: see if fp_class exists
set fp_class d_fp_class
eval $inlibc

: check for fpclassify
echo "Checking to see if you have fpclassify..." >&4
$cat >try.c <<EOCP
#include <math.h>
int main() { return fpclassify(1.0) == FP_NORMAL ? 0 : 1; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have fpclassify."
else
	val="$undef"
	echo "You do not have fpclassify."
fi
$rm_try
set d_fpclassify
eval $setvar

: see if fp_classify exists
set fp_classify d_fp_classify
eval $inlibc

: see if fp_classl exists
set fp_classl d_fp_classl
eval $inlibc

: see if pathconf exists
set pathconf d_pathconf
eval $inlibc

: see if fpathconf exists
set fpathconf d_fpathconf
eval $inlibc

: see if fpclass exists
set fpclass d_fpclass
eval $inlibc

: see if fpclassl exists
set fpclassl d_fpclassl
eval $inlibc

: see if fpgetround exists
set fpgetround d_fpgetround
eval $inlibc

: check for fpos64_t
echo " "
echo "Checking to see if you have fpos64_t..." >&4
$cat >try.c <<EOCP
#include <stdio.h>
int main() { fpos64_t x = 7; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have fpos64_t."
else
	val="$undef"
	echo "You do not have fpos64_t."
	case "$fpossize" in
	8) echo "(Your fpos_t is 64 bits, so you could use that.)" ;;
	esac
fi
$rm_try
set d_fpos64_t
eval $setvar

: see if frexpl exists
set frexpl d_frexpl
eval $inlibc

: see if this is a sys/param system
set sys/param.h i_sysparam
eval $inhdr

: see if this is a sys/mount.h system
set sys/mount.h i_sysmount
eval $inhdr

: Check for fs_data_s
echo " "
echo "Checking to see if your system supports struct fs_data..." >&4
set d_fs_data_s fs_data $i_systypes sys/types.h $i_sysparam sys/param.h $i_sysmount sys/mount.h
eval $hasstruct
case "$d_fs_data_s" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac

: see if fseeko exists
set fseeko d_fseeko
eval $inlibc
case "$longsize" in
8) echo "(Your long is 64 bits, so you could use fseek.)" ;;
esac

: see if fsetpos exists
set fsetpos d_fsetpos
eval $inlibc

: see if fstatfs exists
set fstatfs d_fstatfs
eval $inlibc

: see if statvfs exists
set statvfs d_statvfs
eval $inlibc

: see if fstatvfs exists
set fstatvfs d_fstatvfs
eval $inlibc

: see if fsync exists
set fsync d_fsync
eval $inlibc

: see if ftello exists
set ftello d_ftello
eval $inlibc
case "$longsize" in
8) echo "(Your long is 64 bits, so you could use ftell.)" ;;
esac

: check for a working futimes
d_futimes="$undef"
echo " "
echo "Checking if you have a working futimes()" >&4
$cat >try.c <<EOCP
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>

int main ()
{
    int fd, rv;
    fd = open ("try.c", O_RDWR);
    if (-1 == fd) exit (1);
    rv = futimes (fd, NULL);
    exit (rv == -1 ? errno : 0);
}
EOCP
set try
if eval $compile; then
    `$run ./try`
    rc=$?
    case "$rc" in
	0)  echo "Yes, you have" >&4
	    d_futimes="$define"
	    ;;
	*)  echo "No, you have futimes, but it isn't working ($rc) (probably harmless)" >&4
	    ;;
    esac
else
    echo "No, it does not (probably harmless)" >&4
fi
$rm_try

: look for gai_strerror
echo " "
$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
int main ()
{
    return (gai_strerror (0) ? 0 : 1);
    }
EOCP
set try
val="$undef"
if eval $compile; then
    `$run ./try`
    case "$?" in
	0)  echo "A working gai_strerror() found." >&4
	    val="$define" ;;
	*)  echo "gai_strerror() found, but it doesn't work" >&4
	    ;;
	esac
else
    echo "gai_strerror() NOT found." >&4
    fi
set d_gai_strerror
eval $setvar
$rm_try

: see if ndbm.h is available
set ndbm.h i_ndbm
eval $inhdr
: Compatibility location for RedHat 7.1
set gdbm/ndbm.h i_gdbmndbm
eval $inhdr
: Compatibility location for Debian 4.0
set gdbm-ndbm.h i_gdbm_ndbm
eval $inhdr

val="$undef"
if $test "$i_ndbm" = "$define" -o "$i_gdbmndbm" = "$define" -o "$i_gdbm_ndbm" = "$define"; then
	: see if dbm_open exists
	set dbm_open d_dbm_open
	eval $inlibc
	case "$d_dbm_open" in
	$undef)
		i_ndbm="$undef"
		i_gdbmndbm="$undef"
		i_gdbm_ndbm="$undef"
		echo "We won't be including <ndbm.h>"
		val="$undef"
		;;
	*) val="$define"
	   ;;
	esac
fi
set d_ndbm
eval $setvar

ndbm_hdr_protochk='name=$1; hdr=$2;
eval "ihdr=\$""i_$name";
val="$undef";
if $test "$ihdr" = "$define"; then
	$echo "Checking if your <$hdr> uses prototypes..." >&4;
	case "$d_cplusplus" in
	$define) ./protochk "$extern_C void dbm_close(DBM *);" literal "extern \"C\" {" $ihdr $hdr literal "}" && val="$define" ;;
	*) ./protochk "$extern_C void dbm_close(int, int);" $ihdr $hdr || val="$define" ;;
	esac;
	case "$val" in
	$define) $echo "Your <$hdr> seems to have prototypes";;
	*) $echo "Your <$hdr> does not seem to have prototypes";;
	esac;
fi;
set "d_${name}_h_uses_prototypes";
eval $setvar'

set ndbm ndbm.h
eval $ndbm_hdr_protochk
set gdbmndbm gdbm/ndbm.h
eval $ndbm_hdr_protochk
set gdbm_ndbm gdbm-ndbm.h
eval $ndbm_hdr_protochk

: see if getaddrinfo exists
set getaddrinfo d_getaddrinfo
eval $inlibc

: see if getcwd exists
set getcwd d_getcwd
eval $inlibc

: see if getentropy exists
set getentropy d_getentropy
eval $inlibc

: check for getenv behavior
case "$d_getenv_preserves_other_thread" in
'')
$echo "Checking to see if getenv() preserves a different thread's results" >&4
$cat >try.c <<EOCP
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#  include <stdlib.h>
#endif
#include <stdio.h>
#include <string.h>
#$i_pthread I_PTHREAD
#ifdef I_PTHREAD
#  include <pthread.h>
#endif

void *
thread_start(void * arg)
{
    return (void *) getenv("HOME");
}

int main() {
    char * main_buffer;
    char save_main_buffer[1000];
    pthread_t subthread;
    pthread_attr_t attr;

    main_buffer = getenv("PATH");

    /* If too large for our generous allowance, return we couldn't figure it
     * out. */
    if (strlen(main_buffer) >= sizeof(save_main_buffer)) {
        exit(2);
    }

    strcpy(save_main_buffer, main_buffer);

    if (pthread_attr_init(&attr) != 0) {
        exit(2);
    }

    if (pthread_create(&subthread, &attr, thread_start, NULL) != 0) {
        exit(2);
    }

    if (pthread_join(subthread, NULL) != 0) {
        exit(2);
    }

    exit(! (strcmp(main_buffer, save_main_buffer) == 0));
}
EOCP
val=
set try
if eval $compile_ok; then
    $run ./try
    rc=$?
    case "$rc" in
	0) echo "getenv() didn't destroy another thread's buffer" >&4
	   val=$define
	   ;;
	1) echo "getenv() does destroy another thread's buffer" >&4
	   val=$undef
	   ;;
	*) echo "Couldn't determine if getenv() destroys another thread's return value (code=$rc); assuming it does" >&4
	   val=$undef
	   ;;
    esac
else
    echo "(I can't seem to compile the test program.)" >&4
    echo "Assuming that your C library's getenv destroys another thread's return value." >&4
    val=$undef
fi
set d_getenv_preserves_other_thread
eval $setvar
$rm_try
;;
esac

: see if getespwnam exists
set getespwnam d_getespwnam
eval $inlibc

: see if getfsstat exists
set getfsstat d_getfsstat
eval $inlibc

: see if getgrent exists
set getgrent d_getgrent
eval $inlibc

: see if getgrent_r exists
set getgrent_r d_getgrent_r
eval $inlibc
case "$d_getgrent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_grp grp.h"
	case "$d_getgrent_r_proto:$usethreads" in
	":define")	d_getgrent_r_proto=define
		set d_getgrent_r_proto getgrent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getgrent_r_proto" in
	define)
	case "$getgrent_r_proto" in
	''|0) try='int getgrent_r(struct group*, char*, size_t, struct group**);'
	./protochk "$extern_C $try" $hdrs && getgrent_r_proto=I_SBWR ;;
	esac
	case "$getgrent_r_proto" in
	''|0) try='int getgrent_r(struct group*, char*, int, struct group**);'
	./protochk "$extern_C $try" $hdrs && getgrent_r_proto=I_SBIR ;;
	esac
	case "$getgrent_r_proto" in
	''|0) try='struct group* getgrent_r(struct group*, char*, size_t);'
	./protochk "$extern_C $try" $hdrs && getgrent_r_proto=S_SBW ;;
	esac
	case "$getgrent_r_proto" in
	''|0) try='struct group* getgrent_r(struct group*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getgrent_r_proto=S_SBI ;;
	esac
	case "$getgrent_r_proto" in
	''|0) try='int getgrent_r(struct group*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getgrent_r_proto=I_SBI ;;
	esac
	case "$getgrent_r_proto" in
	''|0) try='int getgrent_r(struct group*, char*, int, FILE**);'
	./protochk "$extern_C $try" $hdrs && getgrent_r_proto=I_SBIH ;;
	esac
	case "$getgrent_r_proto" in
	''|0)	d_getgrent_r=undef
		getgrent_r_proto=0
		echo "Disabling getgrent_r, cannot determine prototype." >&4 ;;
	* )	case "$getgrent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getgrent_r_proto="REENTRANT_PROTO_$getgrent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getgrent_r has no prototype, not using it." >&4 ;;
		esac
		d_getgrent_r=undef
		getgrent_r_proto=0
		;;
	esac
	;;
*)	getgrent_r_proto=0
	;;
esac

: see if getgrgid_r exists
set getgrgid_r d_getgrgid_r
eval $inlibc
case "$d_getgrgid_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_grp grp.h"
	case "$d_getgrgid_r_proto:$usethreads" in
	":define")	d_getgrgid_r_proto=define
		set d_getgrgid_r_proto getgrgid_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getgrgid_r_proto" in
	define)
	case "$getgrgid_r_proto" in
	''|0) try='int getgrgid_r(gid_t, struct group*, char*, size_t, struct group**);'
	./protochk "$extern_C $try" $hdrs && getgrgid_r_proto=I_TSBWR ;;
	esac
	case "$getgrgid_r_proto" in
	''|0) try='int getgrgid_r(gid_t, struct group*, char*, int, struct group**);'
	./protochk "$extern_C $try" $hdrs && getgrgid_r_proto=I_TSBIR ;;
	esac
	case "$getgrgid_r_proto" in
	''|0) try='int getgrgid_r(gid_t, struct group*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getgrgid_r_proto=I_TSBI ;;
	esac
	case "$getgrgid_r_proto" in
	''|0) try='struct group* getgrgid_r(gid_t, struct group*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getgrgid_r_proto=S_TSBI ;;
	esac
	case "$getgrgid_r_proto" in
	''|0)	d_getgrgid_r=undef
		getgrgid_r_proto=0
		echo "Disabling getgrgid_r, cannot determine prototype." >&4 ;;
	* )	case "$getgrgid_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getgrgid_r_proto="REENTRANT_PROTO_$getgrgid_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getgrgid_r has no prototype, not using it." >&4 ;;
		esac
		d_getgrgid_r=undef
		getgrgid_r_proto=0
		;;
	esac
	;;
*)	getgrgid_r_proto=0
	;;
esac

: see if getgrnam_r exists
set getgrnam_r d_getgrnam_r
eval $inlibc
case "$d_getgrnam_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_grp grp.h"
	case "$d_getgrnam_r_proto:$usethreads" in
	":define")	d_getgrnam_r_proto=define
		set d_getgrnam_r_proto getgrnam_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getgrnam_r_proto" in
	define)
	case "$getgrnam_r_proto" in
	''|0) try='int getgrnam_r(const char*, struct group*, char*, size_t, struct group**);'
	./protochk "$extern_C $try" $hdrs && getgrnam_r_proto=I_CSBWR ;;
	esac
	case "$getgrnam_r_proto" in
	''|0) try='int getgrnam_r(const char*, struct group*, char*, int, struct group**);'
	./protochk "$extern_C $try" $hdrs && getgrnam_r_proto=I_CSBIR ;;
	esac
	case "$getgrnam_r_proto" in
	''|0) try='struct group* getgrnam_r(const char*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getgrnam_r_proto=S_CBI ;;
	esac
	case "$getgrnam_r_proto" in
	''|0) try='int getgrnam_r(const char*, struct group*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getgrnam_r_proto=I_CSBI ;;
	esac
	case "$getgrnam_r_proto" in
	''|0) try='struct group* getgrnam_r(const char*, struct group*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getgrnam_r_proto=S_CSBI ;;
	esac
	case "$getgrnam_r_proto" in
	''|0)	d_getgrnam_r=undef
		getgrnam_r_proto=0
		echo "Disabling getgrnam_r, cannot determine prototype." >&4 ;;
	* )	case "$getgrnam_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getgrnam_r_proto="REENTRANT_PROTO_$getgrnam_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getgrnam_r has no prototype, not using it." >&4 ;;
		esac
		d_getgrnam_r=undef
		getgrnam_r_proto=0
		;;
	esac
	;;
*)	getgrnam_r_proto=0
	;;
esac

: see if gethostbyaddr exists
set gethostbyaddr d_gethbyaddr
eval $inlibc

: see if gethostbyname exists
set gethostbyname d_gethbyname
eval $inlibc

: see if gethostent exists
set gethostent d_gethent
eval $inlibc

: see how we will look up host name
echo " "
call=''
if set gethostname val -f d_gethname; eval $csym; $val; then
	echo 'gethostname() found.' >&4
	d_gethname="$define"
	call=gethostname
fi
if set uname val -f d_uname; eval $csym; $val; then
	if ./xenix; then
		$cat <<'EOM'
uname() was found, but you're running xenix, and older versions of xenix
have a broken uname(). If you don't really know whether your xenix is old
enough to have a broken system call, use the default answer.

EOM
		dflt=y
		case "$d_uname" in
		"$define") dflt=n;;
		esac
		rp='Is your uname() broken?'
		. ./myread
		case "$ans" in
		n*) d_uname="$define"; call=uname;;
		esac
	else
		echo 'uname() found.' >&4
		d_uname="$define"
		case "$call" in
		'') call=uname ;;
		esac
	fi
fi
case "$d_gethname" in
'') d_gethname="$undef";;
esac
case "$d_uname" in
'') d_uname="$undef";;
esac
case "$d_uname$d_gethname" in
*define*)
	dflt=n
	cat <<EOM

Every now and then someone has a $call() that lies about the hostname
but can't be fixed for political or economic reasons.  If you wish, I can
pretend $call() isn't there and maybe compute hostname at run-time
thanks to the '$phostname' command.

EOM
	rp="Shall I ignore $call() from now on?"
	. ./myread
	case "$ans" in
	y*) d_uname="$undef" d_gethname="$undef"; $echo $n "Okay...$c";;
	esac;;
esac
case "$phostname" in
'') aphostname='';;
*) case "$aphostname" in
	/*) ;;
	*) set X $phostname
		shift
		file=$1
		shift
		file=`./loc $file $file $pth`
		aphostname=`echo $file $*`
		;;
	esac
	;;
esac
case "$d_uname$d_gethname" in
*define*) ;;
*)
	case "$phostname" in
	'')
		echo "There will be no way for $package to get your hostname." >&4;;
	*)
	echo "I'll use 'popen("'"'$aphostname'", "r")'"' to get your hostname." >&4
		;;
	esac;;
esac
case "$d_phostname" in
'') d_phostname="$undef";;
esac

: see if gethostbyaddr_r exists
set gethostbyaddr_r d_gethostbyaddr_r
eval $inlibc
case "$d_gethostbyaddr_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_gethostbyaddr_r_proto:$usethreads" in
	":define")	d_gethostbyaddr_r_proto=define
		set d_gethostbyaddr_r_proto gethostbyaddr_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_gethostbyaddr_r_proto" in
	define)
	case "$gethostbyaddr_r_proto" in
	''|0) try='int gethostbyaddr_r(const char*, size_t, int, struct hostent*, char*, size_t, struct hostent**, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=I_CWISBWRE ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='struct hostent* gethostbyaddr_r(const char*, size_t, int, struct hostent*, char*, size_t, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=S_CWISBWIE ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='struct hostent* gethostbyaddr_r(const char*, size_t, int, struct hostent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=S_CWISBIE ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='struct hostent* gethostbyaddr_r(const void*, size_t, int, struct hostent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=S_TWISBIE ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='struct hostent* gethostbyaddr_r(const char*, int, int, struct hostent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=S_CIISBIE ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='struct hostent* gethostbyaddr_r(const char*, struct hostent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=S_CSBIE ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='struct hostent* gethostbyaddr_r(const void*, struct hostent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=S_TSBIE ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='int gethostbyaddr_r(const char*, size_t, int, struct hostent*, struct hostent_data*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=I_CWISD ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='int gethostbyaddr_r(const char*, int, int, struct hostent*, struct hostent_data*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=I_CIISD ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='int gethostbyaddr_r(const char*, int, int);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=I_CII ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0) try='int gethostbyaddr_r(const void*, socklen_t, int, struct hostent*, char*, size_t, struct hostent**, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyaddr_r_proto=I_TsISBWRE ;;
	esac
	case "$gethostbyaddr_r_proto" in
	''|0)	d_gethostbyaddr_r=undef
		gethostbyaddr_r_proto=0
		echo "Disabling gethostbyaddr_r, cannot determine prototype." >&4 ;;
	* )	case "$gethostbyaddr_r_proto" in
		REENTRANT_PROTO*) ;;
		*) gethostbyaddr_r_proto="REENTRANT_PROTO_$gethostbyaddr_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "gethostbyaddr_r has no prototype, not using it." >&4 ;;
		esac
		d_gethostbyaddr_r=undef
		gethostbyaddr_r_proto=0
		;;
	esac
	;;
*)	gethostbyaddr_r_proto=0
	;;
esac

: see if gethostbyname_r exists
set gethostbyname_r d_gethostbyname_r
eval $inlibc
case "$d_gethostbyname_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_gethostbyname_r_proto:$usethreads" in
	":define")	d_gethostbyname_r_proto=define
		set d_gethostbyname_r_proto gethostbyname_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_gethostbyname_r_proto" in
	define)
	case "$gethostbyname_r_proto" in
	''|0) try='int gethostbyname_r(const char*, struct hostent*, char*, size_t, struct hostent**, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyname_r_proto=I_CSBWRE ;;
	esac
	case "$gethostbyname_r_proto" in
	''|0) try='struct hostent* gethostbyname_r(const char*, struct hostent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostbyname_r_proto=S_CSBIE ;;
	esac
	case "$gethostbyname_r_proto" in
	''|0) try='int gethostbyname_r(const char*, struct hostent*, struct hostent_data*);'
	./protochk "$extern_C $try" $hdrs && gethostbyname_r_proto=I_CSD ;;
	esac
	case "$gethostbyname_r_proto" in
	''|0)	d_gethostbyname_r=undef
		gethostbyname_r_proto=0
		echo "Disabling gethostbyname_r, cannot determine prototype." >&4 ;;
	* )	case "$gethostbyname_r_proto" in
		REENTRANT_PROTO*) ;;
		*) gethostbyname_r_proto="REENTRANT_PROTO_$gethostbyname_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "gethostbyname_r has no prototype, not using it." >&4 ;;
		esac
		d_gethostbyname_r=undef
		gethostbyname_r_proto=0
		;;
	esac
	;;
*)	gethostbyname_r_proto=0
	;;
esac

: see if gethostent_r exists
set gethostent_r d_gethostent_r
eval $inlibc
case "$d_gethostent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_gethostent_r_proto:$usethreads" in
	":define")	d_gethostent_r_proto=define
		set d_gethostent_r_proto gethostent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_gethostent_r_proto" in
	define)
	case "$gethostent_r_proto" in
	''|0) try='int gethostent_r(struct hostent*, char*, size_t, struct hostent**, int*);'
	./protochk "$extern_C $try" $hdrs && gethostent_r_proto=I_SBWRE ;;
	esac
	case "$gethostent_r_proto" in
	''|0) try='int gethostent_r(struct hostent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostent_r_proto=I_SBIE ;;
	esac
	case "$gethostent_r_proto" in
	''|0) try='struct hostent* gethostent_r(struct hostent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && gethostent_r_proto=S_SBIE ;;
	esac
	case "$gethostent_r_proto" in
	''|0) try='struct hostent* gethostent_r(struct hostent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && gethostent_r_proto=S_SBI ;;
	esac
	case "$gethostent_r_proto" in
	''|0) try='int gethostent_r(struct hostent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && gethostent_r_proto=I_SBI ;;
	esac
	case "$gethostent_r_proto" in
	''|0) try='int gethostent_r(struct hostent*, struct hostent_data*);'
	./protochk "$extern_C $try" $hdrs && gethostent_r_proto=I_SD ;;
	esac
	case "$gethostent_r_proto" in
	''|0)	d_gethostent_r=undef
		gethostent_r_proto=0
		echo "Disabling gethostent_r, cannot determine prototype." >&4 ;;
	* )	case "$gethostent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) gethostent_r_proto="REENTRANT_PROTO_$gethostent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "gethostent_r has no prototype, not using it." >&4 ;;
		esac
		d_gethostent_r=undef
		gethostent_r_proto=0
		;;
	esac
	;;
*)	gethostent_r_proto=0
	;;
esac

: see if prototypes for various gethostxxx netdb.h functions are available
echo " "
set d_gethostprotos gethostent $i_netdb netdb.h
eval $hasproto

: see if getitimer exists
set getitimer d_getitimer
eval $inlibc

: see if getlogin exists
set getlogin d_getlogin
eval $inlibc

: see if getlogin_r exists
set getlogin_r d_getlogin_r
eval $inlibc
case "$d_getlogin_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_unistd unistd.h"
	case "$d_getlogin_r_proto:$usethreads" in
	":define")	d_getlogin_r_proto=define
		set d_getlogin_r_proto getlogin_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getlogin_r_proto" in
	define)
	case "$getlogin_r_proto" in
	''|0) try='int getlogin_r(char*, size_t);'
	./protochk "$extern_C $try" $hdrs && getlogin_r_proto=I_BW ;;
	esac
	case "$getlogin_r_proto" in
	''|0) try='int getlogin_r(char*, int);'
	./protochk "$extern_C $try" $hdrs && getlogin_r_proto=I_BI ;;
	esac
	case "$getlogin_r_proto" in
	''|0) try='char* getlogin_r(char*, size_t);'
	./protochk "$extern_C $try" $hdrs && getlogin_r_proto=B_BW ;;
	esac
	case "$getlogin_r_proto" in
	''|0) try='char* getlogin_r(char*, int);'
	./protochk "$extern_C $try" $hdrs && getlogin_r_proto=B_BI ;;
	esac
	case "$getlogin_r_proto" in
	''|0)	d_getlogin_r=undef
		getlogin_r_proto=0
		echo "Disabling getlogin_r, cannot determine prototype." >&4 ;;
	* )	case "$getlogin_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getlogin_r_proto="REENTRANT_PROTO_$getlogin_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getlogin_r has no prototype, not using it." >&4 ;;
		esac
		d_getlogin_r=undef
		getlogin_r_proto=0
		;;
	esac
	;;
*)	getlogin_r_proto=0
	;;
esac

: see if getmnt exists
set getmnt d_getmnt
eval $inlibc

: see if getmntent exists
set getmntent d_getmntent
eval $inlibc

: see if getnameinfo exists
set getnameinfo d_getnameinfo
eval $inlibc

: see if getnetbyaddr exists
set getnetbyaddr d_getnbyaddr
eval $inlibc

: see if getnetbyname exists
set getnetbyname d_getnbyname
eval $inlibc

: see if getnetent exists
set getnetent d_getnent
eval $inlibc

: see if getnetbyaddr_r exists
set getnetbyaddr_r d_getnetbyaddr_r
eval $inlibc
case "$d_getnetbyaddr_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getnetbyaddr_r_proto:$usethreads" in
	":define")	d_getnetbyaddr_r_proto=define
		set d_getnetbyaddr_r_proto getnetbyaddr_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getnetbyaddr_r_proto" in
	define)
	case "$getnetbyaddr_r_proto" in
	''|0) try='int getnetbyaddr_r(unsigned long, int, struct netent*, char*, size_t, struct netent**, int*);'
	./protochk "$extern_C $try" $hdrs && getnetbyaddr_r_proto=I_UISBWRE ;;
	esac
	case "$getnetbyaddr_r_proto" in
	''|0) try='int getnetbyaddr_r(long, int, struct netent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getnetbyaddr_r_proto=I_LISBI ;;
	esac
	case "$getnetbyaddr_r_proto" in
	''|0) try='struct netent* getnetbyaddr_r(in_addr_t, int, struct netent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getnetbyaddr_r_proto=S_TISBI ;;
	esac
	case "$getnetbyaddr_r_proto" in
	''|0) try='struct netent* getnetbyaddr_r(long, int, struct netent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getnetbyaddr_r_proto=S_LISBI ;;
	esac
	case "$getnetbyaddr_r_proto" in
	''|0) try='int getnetbyaddr_r(in_addr_t, int, struct netent*, struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && getnetbyaddr_r_proto=I_TISD ;;
	esac
	case "$getnetbyaddr_r_proto" in
	''|0) try='int getnetbyaddr_r(long, int, struct netent*, struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && getnetbyaddr_r_proto=I_LISD ;;
	esac
	case "$getnetbyaddr_r_proto" in
	''|0) try='int getnetbyaddr_r(int, int, struct netent*, struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && getnetbyaddr_r_proto=I_IISD ;;
	esac
	case "$getnetbyaddr_r_proto" in
	''|0) try='int getnetbyaddr_r(uint32_t, int, struct netent*, char*, size_t, struct netent**, int*);'
	./protochk "$extern_C $try" $hdrs && getnetbyaddr_r_proto=I_uISBWRE ;;
	esac
	case "$getnetbyaddr_r_proto" in
	''|0)	d_getnetbyaddr_r=undef
		getnetbyaddr_r_proto=0
		echo "Disabling getnetbyaddr_r, cannot determine prototype." >&4 ;;
	* )	case "$getnetbyaddr_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getnetbyaddr_r_proto="REENTRANT_PROTO_$getnetbyaddr_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getnetbyaddr_r has no prototype, not using it." >&4 ;;
		esac
		d_getnetbyaddr_r=undef
		getnetbyaddr_r_proto=0
		;;
	esac
	;;
*)	getnetbyaddr_r_proto=0
	;;
esac

: see if getnetbyname_r exists
set getnetbyname_r d_getnetbyname_r
eval $inlibc
case "$d_getnetbyname_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getnetbyname_r_proto:$usethreads" in
	":define")	d_getnetbyname_r_proto=define
		set d_getnetbyname_r_proto getnetbyname_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getnetbyname_r_proto" in
	define)
	case "$getnetbyname_r_proto" in
	''|0) try='int getnetbyname_r(const char*, struct netent*, char*, size_t, struct netent**, int*);'
	./protochk "$extern_C $try" $hdrs && getnetbyname_r_proto=I_CSBWRE ;;
	esac
	case "$getnetbyname_r_proto" in
	''|0) try='int getnetbyname_r(const char*, struct netent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getnetbyname_r_proto=I_CSBI ;;
	esac
	case "$getnetbyname_r_proto" in
	''|0) try='struct netent* getnetbyname_r(const char*, struct netent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getnetbyname_r_proto=S_CSBI ;;
	esac
	case "$getnetbyname_r_proto" in
	''|0) try='int getnetbyname_r(const char*, struct netent*, struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && getnetbyname_r_proto=I_CSD ;;
	esac
	case "$getnetbyname_r_proto" in
	''|0)	d_getnetbyname_r=undef
		getnetbyname_r_proto=0
		echo "Disabling getnetbyname_r, cannot determine prototype." >&4 ;;
	* )	case "$getnetbyname_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getnetbyname_r_proto="REENTRANT_PROTO_$getnetbyname_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getnetbyname_r has no prototype, not using it." >&4 ;;
		esac
		d_getnetbyname_r=undef
		getnetbyname_r_proto=0
		;;
	esac
	;;
*)	getnetbyname_r_proto=0
	;;
esac

: see if getnetent_r exists
set getnetent_r d_getnetent_r
eval $inlibc
case "$d_getnetent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getnetent_r_proto:$usethreads" in
	":define")	d_getnetent_r_proto=define
		set d_getnetent_r_proto getnetent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getnetent_r_proto" in
	define)
	case "$getnetent_r_proto" in
	''|0) try='int getnetent_r(struct netent*, char*, size_t, struct netent**, int*);'
	./protochk "$extern_C $try" $hdrs && getnetent_r_proto=I_SBWRE ;;
	esac
	case "$getnetent_r_proto" in
	''|0) try='int getnetent_r(struct netent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && getnetent_r_proto=I_SBIE ;;
	esac
	case "$getnetent_r_proto" in
	''|0) try='struct netent* getnetent_r(struct netent*, char*, int, int*);'
	./protochk "$extern_C $try" $hdrs && getnetent_r_proto=S_SBIE ;;
	esac
	case "$getnetent_r_proto" in
	''|0) try='struct netent* getnetent_r(struct netent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getnetent_r_proto=S_SBI ;;
	esac
	case "$getnetent_r_proto" in
	''|0) try='int getnetent_r(struct netent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getnetent_r_proto=I_SBI ;;
	esac
	case "$getnetent_r_proto" in
	''|0) try='int getnetent_r(struct netent*, struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && getnetent_r_proto=I_SD ;;
	esac
	case "$getnetent_r_proto" in
	''|0)	d_getnetent_r=undef
		getnetent_r_proto=0
		echo "Disabling getnetent_r, cannot determine prototype." >&4 ;;
	* )	case "$getnetent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getnetent_r_proto="REENTRANT_PROTO_$getnetent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getnetent_r has no prototype, not using it." >&4 ;;
		esac
		d_getnetent_r=undef
		getnetent_r_proto=0
		;;
	esac
	;;
*)	getnetent_r_proto=0
	;;
esac

: see if prototypes for various getnetxxx netdb.h functions are available
echo " "
set d_getnetprotos getnetent $i_netdb netdb.h
eval $hasproto

: see if getpagesize exists
set getpagesize d_getpagsz
eval $inlibc

: Optional checks for getprotobyname and getprotobynumber

: see if getprotobyname exists
set getprotobyname d_getpbyname
eval $inlibc

: see if getprotobynumber exists
set getprotobynumber d_getpbynumber
eval $inlibc

: see if getprotoent exists
set getprotoent d_getpent
eval $inlibc

: see if getpgid exists
set getpgid d_getpgid
eval $inlibc

: see if getpgrp2 exists
set getpgrp2 d_getpgrp2
eval $inlibc

: see if getppid exists
set getppid d_getppid
eval $inlibc

: see if getpriority exists
set getpriority d_getprior
eval $inlibc

: see if getprotobyname_r exists
set getprotobyname_r d_getprotobyname_r
eval $inlibc
case "$d_getprotobyname_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getprotobyname_r_proto:$usethreads" in
	":define")	d_getprotobyname_r_proto=define
		set d_getprotobyname_r_proto getprotobyname_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getprotobyname_r_proto" in
	define)
	case "$getprotobyname_r_proto" in
	''|0) try='int getprotobyname_r(const char*, struct protoent*, char*, size_t, struct protoent**);'
	./protochk "$extern_C $try" $hdrs && getprotobyname_r_proto=I_CSBWR ;;
	esac
	case "$getprotobyname_r_proto" in
	''|0) try='struct protoent* getprotobyname_r(const char*, struct protoent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getprotobyname_r_proto=S_CSBI ;;
	esac
	case "$getprotobyname_r_proto" in
	''|0) try='int getprotobyname_r(const char*, struct protoent*, struct protoent_data*);'
	./protochk "$extern_C $try" $hdrs && getprotobyname_r_proto=I_CSD ;;
	esac
	case "$getprotobyname_r_proto" in
	''|0)	d_getprotobyname_r=undef
		getprotobyname_r_proto=0
		echo "Disabling getprotobyname_r, cannot determine prototype." >&4 ;;
	* )	case "$getprotobyname_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getprotobyname_r_proto="REENTRANT_PROTO_$getprotobyname_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getprotobyname_r has no prototype, not using it." >&4 ;;
		esac
		d_getprotobyname_r=undef
		getprotobyname_r_proto=0
		;;
	esac
	;;
*)	getprotobyname_r_proto=0
	;;
esac

: see if getprotobynumber_r exists
set getprotobynumber_r d_getprotobynumber_r
eval $inlibc
case "$d_getprotobynumber_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getprotobynumber_r_proto:$usethreads" in
	":define")	d_getprotobynumber_r_proto=define
		set d_getprotobynumber_r_proto getprotobynumber_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getprotobynumber_r_proto" in
	define)
	case "$getprotobynumber_r_proto" in
	''|0) try='int getprotobynumber_r(int, struct protoent*, char*, size_t, struct protoent**);'
	./protochk "$extern_C $try" $hdrs && getprotobynumber_r_proto=I_ISBWR ;;
	esac
	case "$getprotobynumber_r_proto" in
	''|0) try='struct protoent* getprotobynumber_r(int, struct protoent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getprotobynumber_r_proto=S_ISBI ;;
	esac
	case "$getprotobynumber_r_proto" in
	''|0) try='int getprotobynumber_r(int, struct protoent*, struct protoent_data*);'
	./protochk "$extern_C $try" $hdrs && getprotobynumber_r_proto=I_ISD ;;
	esac
	case "$getprotobynumber_r_proto" in
	''|0)	d_getprotobynumber_r=undef
		getprotobynumber_r_proto=0
		echo "Disabling getprotobynumber_r, cannot determine prototype." >&4 ;;
	* )	case "$getprotobynumber_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getprotobynumber_r_proto="REENTRANT_PROTO_$getprotobynumber_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getprotobynumber_r has no prototype, not using it." >&4 ;;
		esac
		d_getprotobynumber_r=undef
		getprotobynumber_r_proto=0
		;;
	esac
	;;
*)	getprotobynumber_r_proto=0
	;;
esac

: see if getprotoent_r exists
set getprotoent_r d_getprotoent_r
eval $inlibc
case "$d_getprotoent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getprotoent_r_proto:$usethreads" in
	":define")	d_getprotoent_r_proto=define
		set d_getprotoent_r_proto getprotoent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getprotoent_r_proto" in
	define)
	case "$getprotoent_r_proto" in
	''|0) try='int getprotoent_r(struct protoent*, char*, size_t, struct protoent**);'
	./protochk "$extern_C $try" $hdrs && getprotoent_r_proto=I_SBWR ;;
	esac
	case "$getprotoent_r_proto" in
	''|0) try='int getprotoent_r(struct protoent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getprotoent_r_proto=I_SBI ;;
	esac
	case "$getprotoent_r_proto" in
	''|0) try='struct protoent* getprotoent_r(struct protoent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getprotoent_r_proto=S_SBI ;;
	esac
	case "$getprotoent_r_proto" in
	''|0) try='int getprotoent_r(struct protoent*, struct protoent_data*);'
	./protochk "$extern_C $try" $hdrs && getprotoent_r_proto=I_SD ;;
	esac
	case "$getprotoent_r_proto" in
	''|0)	d_getprotoent_r=undef
		getprotoent_r_proto=0
		echo "Disabling getprotoent_r, cannot determine prototype." >&4 ;;
	* )	case "$getprotoent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getprotoent_r_proto="REENTRANT_PROTO_$getprotoent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getprotoent_r has no prototype, not using it." >&4 ;;
		esac
		d_getprotoent_r=undef
		getprotoent_r_proto=0
		;;
	esac
	;;
*)	getprotoent_r_proto=0
	;;
esac

: see if prototypes for various getprotoxxx netdb.h functions are available
echo " "
set d_getprotoprotos getprotoent $i_netdb netdb.h
eval $hasproto

: see if getprpwnam exists
set getprpwnam d_getprpwnam
eval $inlibc

: see if getpwent exists
set getpwent d_getpwent
eval $inlibc

: see if getpwent_r exists
set getpwent_r d_getpwent_r
eval $inlibc
case "$d_getpwent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_pwd pwd.h"
	case "$d_getpwent_r_proto:$usethreads" in
	":define")	d_getpwent_r_proto=define
		set d_getpwent_r_proto getpwent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getpwent_r_proto" in
	define)
	case "$getpwent_r_proto" in
	''|0) try='int getpwent_r(struct passwd*, char*, size_t, struct passwd**);'
	./protochk "$extern_C $try" $hdrs && getpwent_r_proto=I_SBWR ;;
	esac
	case "$getpwent_r_proto" in
	''|0) try='int getpwent_r(struct passwd*, char*, int, struct passwd**);'
	./protochk "$extern_C $try" $hdrs && getpwent_r_proto=I_SBIR ;;
	esac
	case "$getpwent_r_proto" in
	''|0) try='struct passwd* getpwent_r(struct passwd*, char*, size_t);'
	./protochk "$extern_C $try" $hdrs && getpwent_r_proto=S_SBW ;;
	esac
	case "$getpwent_r_proto" in
	''|0) try='struct passwd* getpwent_r(struct passwd*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getpwent_r_proto=S_SBI ;;
	esac
	case "$getpwent_r_proto" in
	''|0) try='int getpwent_r(struct passwd*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getpwent_r_proto=I_SBI ;;
	esac
	case "$getpwent_r_proto" in
	''|0) try='int getpwent_r(struct passwd*, char*, int, FILE**);'
	./protochk "$extern_C $try" $hdrs && getpwent_r_proto=I_SBIH ;;
	esac
	case "$getpwent_r_proto" in
	''|0)	d_getpwent_r=undef
		getpwent_r_proto=0
		echo "Disabling getpwent_r, cannot determine prototype." >&4 ;;
	* )	case "$getpwent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getpwent_r_proto="REENTRANT_PROTO_$getpwent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getpwent_r has no prototype, not using it." >&4 ;;
		esac
		d_getpwent_r=undef
		getpwent_r_proto=0
		;;
	esac
	;;
*)	getpwent_r_proto=0
	;;
esac

: see if getpwnam_r exists
set getpwnam_r d_getpwnam_r
eval $inlibc
case "$d_getpwnam_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_pwd pwd.h"
	case "$d_getpwnam_r_proto:$usethreads" in
	":define")	d_getpwnam_r_proto=define
		set d_getpwnam_r_proto getpwnam_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getpwnam_r_proto" in
	define)
	case "$getpwnam_r_proto" in
	''|0) try='int getpwnam_r(const char*, struct passwd*, char*, size_t, struct passwd**);'
	./protochk "$extern_C $try" $hdrs && getpwnam_r_proto=I_CSBWR ;;
	esac
	case "$getpwnam_r_proto" in
	''|0) try='int getpwnam_r(const char*, struct passwd*, char*, int, struct passwd**);'
	./protochk "$extern_C $try" $hdrs && getpwnam_r_proto=I_CSBIR ;;
	esac
	case "$getpwnam_r_proto" in
	''|0) try='struct passwd* getpwnam_r(const char*, struct passwd*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getpwnam_r_proto=S_CSBI ;;
	esac
	case "$getpwnam_r_proto" in
	''|0) try='int getpwnam_r(const char*, struct passwd*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getpwnam_r_proto=I_CSBI ;;
	esac
	case "$getpwnam_r_proto" in
	''|0)	d_getpwnam_r=undef
		getpwnam_r_proto=0
		echo "Disabling getpwnam_r, cannot determine prototype." >&4 ;;
	* )	case "$getpwnam_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getpwnam_r_proto="REENTRANT_PROTO_$getpwnam_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getpwnam_r has no prototype, not using it." >&4 ;;
		esac
		d_getpwnam_r=undef
		getpwnam_r_proto=0
		;;
	esac
	;;
*)	getpwnam_r_proto=0
	;;
esac

: see if getpwuid_r exists
set getpwuid_r d_getpwuid_r
eval $inlibc
case "$d_getpwuid_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_pwd pwd.h"
	case "$d_getpwuid_r_proto:$usethreads" in
	":define")	d_getpwuid_r_proto=define
		set d_getpwuid_r_proto getpwuid_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getpwuid_r_proto" in
	define)
	case "$getpwuid_r_proto" in
	''|0) try='int getpwuid_r(uid_t, struct passwd*, char*, size_t, struct passwd**);'
	./protochk "$extern_C $try" $hdrs && getpwuid_r_proto=I_TSBWR ;;
	esac
	case "$getpwuid_r_proto" in
	''|0) try='int getpwuid_r(uid_t, struct passwd*, char*, int, struct passwd**);'
	./protochk "$extern_C $try" $hdrs && getpwuid_r_proto=I_TSBIR ;;
	esac
	case "$getpwuid_r_proto" in
	''|0) try='int getpwuid_r(uid_t, struct passwd*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getpwuid_r_proto=I_TSBI ;;
	esac
	case "$getpwuid_r_proto" in
	''|0) try='struct passwd* getpwuid_r(uid_t, struct passwd*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getpwuid_r_proto=S_TSBI ;;
	esac
	case "$getpwuid_r_proto" in
	''|0)	d_getpwuid_r=undef
		getpwuid_r_proto=0
		echo "Disabling getpwuid_r, cannot determine prototype." >&4 ;;
	* )	case "$getpwuid_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getpwuid_r_proto="REENTRANT_PROTO_$getpwuid_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getpwuid_r has no prototype, not using it." >&4 ;;
		esac
		d_getpwuid_r=undef
		getpwuid_r_proto=0
		;;
	esac
	;;
*)	getpwuid_r_proto=0
	;;
esac

: Optional checks for getsbyname and getsbyport

: see if getservbyname exists
set getservbyname d_getsbyname
eval $inlibc

: see if getservbyport exists
set getservbyport d_getsbyport
eval $inlibc

: see if getservent exists
set getservent d_getsent
eval $inlibc

: see if getservbyname_r exists
set getservbyname_r d_getservbyname_r
eval $inlibc
case "$d_getservbyname_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getservbyname_r_proto:$usethreads" in
	":define")	d_getservbyname_r_proto=define
		set d_getservbyname_r_proto getservbyname_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getservbyname_r_proto" in
	define)
	case "$getservbyname_r_proto" in
	''|0) try='int getservbyname_r(const char*, const char*, struct servent*, char*, size_t, struct servent**);'
	./protochk "$extern_C $try" $hdrs && getservbyname_r_proto=I_CCSBWR ;;
	esac
	case "$getservbyname_r_proto" in
	''|0) try='struct servent* getservbyname_r(const char*, const char*, struct servent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getservbyname_r_proto=S_CCSBI ;;
	esac
	case "$getservbyname_r_proto" in
	''|0) try='int getservbyname_r(const char*, const char*, struct servent*, struct servent_data*);'
	./protochk "$extern_C $try" $hdrs && getservbyname_r_proto=I_CCSD ;;
	esac
	case "$getservbyname_r_proto" in
	''|0)	d_getservbyname_r=undef
		getservbyname_r_proto=0
		echo "Disabling getservbyname_r, cannot determine prototype." >&4 ;;
	* )	case "$getservbyname_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getservbyname_r_proto="REENTRANT_PROTO_$getservbyname_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getservbyname_r has no prototype, not using it." >&4 ;;
		esac
		d_getservbyname_r=undef
		getservbyname_r_proto=0
		;;
	esac
	;;
*)	getservbyname_r_proto=0
	;;
esac

: see if getservbyport_r exists
set getservbyport_r d_getservbyport_r
eval $inlibc
case "$d_getservbyport_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getservbyport_r_proto:$usethreads" in
	":define")	d_getservbyport_r_proto=define
		set d_getservbyport_r_proto getservbyport_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getservbyport_r_proto" in
	define)
	case "$getservbyport_r_proto" in
	''|0) try='int getservbyport_r(int, const char*, struct servent*, char*, size_t, struct servent**);'
	./protochk "$extern_C $try" $hdrs && getservbyport_r_proto=I_ICSBWR ;;
	esac
	case "$getservbyport_r_proto" in
	''|0) try='struct servent* getservbyport_r(int, const char*, struct servent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getservbyport_r_proto=S_ICSBI ;;
	esac
	case "$getservbyport_r_proto" in
	''|0) try='int getservbyport_r(int, const char*, struct servent*, struct servent_data*);'
	./protochk "$extern_C $try" $hdrs && getservbyport_r_proto=I_ICSD ;;
	esac
	case "$getservbyport_r_proto" in
	''|0)	d_getservbyport_r=undef
		getservbyport_r_proto=0
		echo "Disabling getservbyport_r, cannot determine prototype." >&4 ;;
	* )	case "$getservbyport_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getservbyport_r_proto="REENTRANT_PROTO_$getservbyport_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getservbyport_r has no prototype, not using it." >&4 ;;
		esac
		d_getservbyport_r=undef
		getservbyport_r_proto=0
		;;
	esac
	;;
*)	getservbyport_r_proto=0
	;;
esac

: see if getservent_r exists
set getservent_r d_getservent_r
eval $inlibc
case "$d_getservent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_getservent_r_proto:$usethreads" in
	":define")	d_getservent_r_proto=define
		set d_getservent_r_proto getservent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getservent_r_proto" in
	define)
	case "$getservent_r_proto" in
	''|0) try='int getservent_r(struct servent*, char*, size_t, struct servent**);'
	./protochk "$extern_C $try" $hdrs && getservent_r_proto=I_SBWR ;;
	esac
	case "$getservent_r_proto" in
	''|0) try='int getservent_r(struct servent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getservent_r_proto=I_SBI ;;
	esac
	case "$getservent_r_proto" in
	''|0) try='struct servent* getservent_r(struct servent*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getservent_r_proto=S_SBI ;;
	esac
	case "$getservent_r_proto" in
	''|0) try='int getservent_r(struct servent*, struct servent_data*);'
	./protochk "$extern_C $try" $hdrs && getservent_r_proto=I_SD ;;
	esac
	case "$getservent_r_proto" in
	''|0)	d_getservent_r=undef
		getservent_r_proto=0
		echo "Disabling getservent_r, cannot determine prototype." >&4 ;;
	* )	case "$getservent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getservent_r_proto="REENTRANT_PROTO_$getservent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getservent_r has no prototype, not using it." >&4 ;;
		esac
		d_getservent_r=undef
		getservent_r_proto=0
		;;
	esac
	;;
*)	getservent_r_proto=0
	;;
esac

: see if prototypes for various getservxxx netdb.h functions are available
echo " "
set d_getservprotos getservent $i_netdb netdb.h
eval $hasproto

: see if getspnam exists
set getspnam d_getspnam
eval $inlibc

: see if this is a shadow.h system
set shadow.h i_shadow
eval $inhdr

: see if getspnam_r exists
set getspnam_r d_getspnam_r
eval $inlibc
case "$d_getspnam_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_shadow shadow.h"
	case "$d_getspnam_r_proto:$usethreads" in
	":define")	d_getspnam_r_proto=define
		set d_getspnam_r_proto getspnam_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_getspnam_r_proto" in
	define)
	case "$getspnam_r_proto" in
	''|0) try='int getspnam_r(const char*, struct spwd*, char*, size_t, struct spwd**);'
	./protochk "$extern_C $try" $hdrs && getspnam_r_proto=I_CSBWR ;;
	esac
	case "$getspnam_r_proto" in
	''|0) try='struct spwd* getspnam_r(const char*, struct spwd*, char*, int);'
	./protochk "$extern_C $try" $hdrs && getspnam_r_proto=S_CSBI ;;
	esac
	case "$getspnam_r_proto" in
	''|0)	d_getspnam_r=undef
		getspnam_r_proto=0
		echo "Disabling getspnam_r, cannot determine prototype." >&4 ;;
	* )	case "$getspnam_r_proto" in
		REENTRANT_PROTO*) ;;
		*) getspnam_r_proto="REENTRANT_PROTO_$getspnam_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "getspnam_r has no prototype, not using it." >&4 ;;
		esac
		d_getspnam_r=undef
		getspnam_r_proto=0
		;;
	esac
	;;
*)	getspnam_r_proto=0
	;;
esac

: see if gettimeofday or ftime exists
set gettimeofday d_gettimeod
eval $inlibc
case "$d_gettimeod" in
"$undef")
	set ftime d_ftime 
	eval $inlibc
	;;
*)
	val="$undef"; set d_ftime; eval $setvar
	;;
esac
case "$d_gettimeod$d_ftime" in
"$undef$undef")
	echo " "
	echo 'No ftime() nor gettimeofday() -- timing may be less accurate.' >&4
	;;
esac

: see if gmtime_r exists
set gmtime_r d_gmtime_r
eval $inlibc
case "$d_gmtime_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_time time.h $i_systime sys/time.h"
	case "$d_gmtime_r_proto:$usethreads" in
	":define")	d_gmtime_r_proto=define
		set d_gmtime_r_proto gmtime_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_gmtime_r_proto" in
	define)
	case "$gmtime_r_proto" in
	''|0) try='struct tm* gmtime_r(const time_t*, struct tm*);'
	./protochk "$extern_C $try" $hdrs && gmtime_r_proto=S_TS ;;
	esac
	case "$gmtime_r_proto" in
	''|0) try='int gmtime_r(const time_t*, struct tm*);'
	./protochk "$extern_C $try" $hdrs && gmtime_r_proto=I_TS ;;
	esac
	case "$gmtime_r_proto" in
	''|0)	d_gmtime_r=undef
		gmtime_r_proto=0
		echo "Disabling gmtime_r, cannot determine prototype." >&4 ;;
	* )	case "$gmtime_r_proto" in
		REENTRANT_PROTO*) ;;
		*) gmtime_r_proto="REENTRANT_PROTO_$gmtime_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "gmtime_r has no prototype, not using it." >&4 ;;
		esac
		d_gmtime_r=undef
		gmtime_r_proto=0
		;;
	esac
	;;
*)	gmtime_r_proto=0
	;;
esac

: see if hasmntopt exists
set hasmntopt d_hasmntopt
eval $inlibc

: see if this is a netinet/in.h or sys/in.h system
set netinet/in.h i_niin sys/in.h i_sysin
eval $inhdr

: see if arpa/inet.h has to be included
set arpa/inet.h i_arpainet
eval $inhdr

: see if htonl --and friends-- exists
val=''
set htonl val
eval $inlibc

: Maybe they are macros.
case "$val" in
$undef)
	$cat >htonl.c <<EOM
#include <stdio.h>
#include <sys/types.h>
#$i_niin I_NETINET_IN
#$i_sysin I_SYS_IN
#$i_arpainet I_ARPA_INET
#ifdef I_NETINET_IN
#include <netinet/in.h>
#endif
#ifdef I_SYS_IN
#include <sys/in.h>
#endif
#ifdef I_ARPA_INET
#include <arpa/inet.h>
#endif
#ifdef htonl
printf("Defined as a macro.");
#endif
EOM
	$cppstdin $cppflags $cppminus < htonl.c >htonl.E 2>/dev/null
	if $contains 'Defined as a macro' htonl.E >/dev/null 2>&1; then
		val="$define"
		echo "But it seems to be defined as a macro." >&4
	fi
	$rm -f htonl.?
	;;
esac
set d_htonl
eval $setvar

: see if hypot exists
set hypot d_hypot
eval $inlibc

: see if ilogb exists
set ilogb d_ilogb
eval $inlibc

: see if ilogbl exists
set ilogbl d_ilogbl
eval $inlibc

: check whether inet_aton exists
set inet_aton d_inetaton
eval $inlibc

: see if inet_ntop exists
set inet_ntop d_inetntop
eval $inlibc

: see if inet_pton exists
set inet_pton d_inetpton
eval $inlibc

: Look for isascii
echo " "
$cat >isascii.c <<EOCP
#include <stdio.h>
#include <ctype.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
	int c = 'A';
	if (isascii(c))
		exit(0);
	else
		exit(1);
}
EOCP
set isascii
if eval $compile; then
	echo "isascii() found." >&4
	val="$define"
else
	echo "isascii() NOT found." >&4
	val="$undef"
fi
set d_isascii
eval $setvar
$rm -f isascii*

: Look for isblank
echo " "
$cat >isblank.c <<'EOCP'
#include <stdio.h>
#include <ctype.h>
int main() {
	int c = ' ';
	if (isblank(c))
		return 0 ;
	else
		return 1 ;
}
EOCP
if $cc $ccflags $ldflags -o isblank isblank.c $libs >/dev/null 2>&1 ; then
	echo "isblank() found." >&4
	val="$define"
else
	echo "isblank() NOT found." >&4
	val="$undef"
fi
set d_isblank
eval $setvar
$rm -f isblank*

: check for isfinite
echo "Checking to see if you have isfinite..." >&4
$cat >try.c <<EOCP
#include <math.h>
int main() { return isfinite(0.0); }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have isfinite."
else
	val="$undef"
	echo "You do not have isfinite."
fi
$rm_try
set d_isfinite
eval $setvar

: see if isfinitel exists
set isfinitel d_isfinitel
eval $inlibc

: check for isinf
echo "Checking to see if you have isinf..." >&4
$cat >try.c <<EOCP
#include <math.h>
int main() { return isinf(0.0); }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have isinf."
else
	val="$undef"
	echo "You do not have isinf."
fi
$rm_try
set d_isinf
eval $setvar

: see if isinfl exists
set isinfl d_isinfl
eval $inlibc

: check for isless
echo "Checking to see if you have isless..." >&4
$cat >try.c <<EOCP
#include <math.h>
int main() { return isless(2.0, 1.0); }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have isless."
else
	val="$undef"
	echo "You do not have isless."
fi
$rm_try
set d_isless
eval $setvar

: check for isnan
echo "Checking to see if you have isnan..." >&4
$cat >try.c <<EOCP
#include <math.h>
int main() { return isnan(0.0); }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have isnan."
else
	val="$undef"
	echo "You do not have isnan."
fi
$rm_try
set d_isnan
eval $setvar

: see if isnanl exists
set isnanl d_isnanl
eval $inlibc

: check for isnormal
echo "Checking to see if you have isnormal..." >&4
$cat >try.c <<EOCP
#include <math.h>
int main() { return isnormal(0.0); }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have isnormal."
else
	val="$undef"
	echo "You do not have isnormal."
fi
$rm_try
set d_isnormal
eval $setvar

: see if j0 exists
set j0 d_j0
eval $inlibc

: see if j0l exists
set j0l d_j0l
eval $inlibc

: see if killpg exists
set killpg d_killpg
eval $inlibc

: see if localeconv exists
set localeconv d_locconv
eval $inlibc

: see if libc has the POSIX.1-2008 currency locale rules
case "$d_locconv:$d_lc_monetary_2008" in
$define:)
	$cat >try.c <<EOCP
#include <locale.h>
int main() {
	struct lconv *lc = localeconv();
	char int_p_cs_precedes = lc->int_p_cs_precedes;
	return 0;
}
EOCP
	set try
	if eval $compile; then
		d_lc_monetary_2008="$define"
	else
		d_lc_monetary_2008="$undef"
	fi;
	$rm_try
	;;
*)	d_lc_monetary_2008="$undef"
	;;
esac

: see if lchown exists
echo " "
$cat > try.c <<EOCP
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#$i_unistd	I_UNISTD
#ifdef I_UNISTD
#  include <unistd.h>
#endif
int main(int argc, char *argv[])
{
   if (lchown("./try.c", -1, getgid()) == -1) {
       exit(EXIT_FAILURE);
   }
   exit(EXIT_SUCCESS);
}
EOCP
set try
if eval $compile && ./try; then
    $echo "lchown() found." >&4
    val="$define"
else
    $echo "lchown() NOT found." >&4
    val="$undef"
fi
set d_lchown
eval $setvar
$rm_try

: See if number of significant digits in a double precision number is known
echo " "
$cat >ldbl_dig.c <<EOM
#include <limits.h>
#include <float.h>
#ifdef LDBL_DIG
printf("Contains LDBL_DIG");
#endif
EOM
$cppstdin $cppflags $cppminus < ldbl_dig.c >ldbl_dig.E 2>/dev/null
if $contains 'LDBL_DIG' ldbl_dig.E >/dev/null 2>&1; then
	echo "LDBL_DIG found." >&4
	val="$define"
else
	echo "LDBL_DIG NOT found." >&4
	val="$undef"
fi
$rm -f ldbl_dig.?
set d_ldbl_dig
eval $setvar

: see if lgamma exists
set lgamma d_lgamma
eval $inlibc

: see if lgamma_r exists
set lgamma_r d_lgamma_r
eval $inlibc

: check to see if math.h defines _LIB_VERSION
d_libm_lib_version="$undef"
echo " "
echo "Checking to see if your libm supports _LIB_VERSION..." >&4
$cat >try.c <<EOCP
#include <unistd.h>
#include <math.h>
#include <stdio.h>
int main (int argc, char *argv[])
{
    printf ("%d\n", _LIB_VERSION);
    return (0);
    } /* main */
EOCP
set try
if eval $compile; then
    foo=`$run ./try`
    echo "Yes, it does ($foo)" >&4
    d_libm_lib_version="$define"
else
    echo "No, it does not (probably harmless)" >&4
    fi
$rm_try

: see if link exists
set link d_link
eval $inlibc

: see if llrint exists
set llrint d_llrint
eval $inlibc

: see if llrintl exists
set llrintl d_llrintl
eval $inlibc

: see if llround exists
set llround d_llround
eval $inlibc

: see if llroundl exists
set llroundl d_llroundl
eval $inlibc

: see if malloc/malloc.h has to be included
set malloc/malloc.h i_mallocmalloc
eval $inhdr

: see if this is a malloc.h system
: we want a real compile instead of Inhdr because some systems have a
: malloc.h that just gives a compile error saying to use stdlib.h instead
echo " "
$cat >try.c <<EOCP
#include <stdlib.h>
#include <malloc.h>
#$i_mallocmalloc I_MALLOCMALLOC
#ifdef I_MALLOCMALLOC
# include <malloc/malloc.h>
#endif

int main () { return 0; }
EOCP
set try
if eval $compile; then
    echo "<malloc.h> found." >&4
    val="$define"
else
    echo "<malloc.h> NOT found." >&4
    val="$undef"
fi
$rm_try
set i_malloc
eval $setvar

: see if localtime_r exists
set localtime_r d_localtime_r
eval $inlibc
case "$d_localtime_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_time time.h $i_systime sys/time.h"
	case "$d_localtime_r_proto:$usethreads" in
	":define")	d_localtime_r_proto=define
		set d_localtime_r_proto localtime_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_localtime_r_proto" in
	define)
	case "$localtime_r_proto" in
	''|0) try='struct tm* localtime_r(const time_t*, struct tm*);'
	./protochk "$extern_C $try" $hdrs && localtime_r_proto=S_TS ;;
	esac
	case "$localtime_r_proto" in
	''|0) try='int localtime_r(const time_t*, struct tm*);'
	./protochk "$extern_C $try" $hdrs && localtime_r_proto=I_TS ;;
	esac
	case "$localtime_r_proto" in
	''|0)	d_localtime_r=undef
		localtime_r_proto=0
		echo "Disabling localtime_r, cannot determine prototype." >&4 ;;
	* )	case "$localtime_r_proto" in
		REENTRANT_PROTO*) ;;
		*) localtime_r_proto="REENTRANT_PROTO_$localtime_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "localtime_r has no prototype, not using it." >&4 ;;
		esac
		d_localtime_r=undef
		localtime_r_proto=0
		;;
	esac
	;;
*)	localtime_r_proto=0
	;;
esac

: see if localtime_r calls tzset
case "$localtime_r_proto" in
REENTRANT_PROTO*)
	$cat >try.c <<EOCP
/*  Does our libc's localtime_r call tzset ?
 *  return 0 if so, 1 otherwise.
 */
#$i_systypes	I_SYS_TYPES
#$i_unistd	I_UNISTD
#$i_time	I_TIME
#$i_stdlib	I_STDLIB
#$i_malloc	I_MALLOC
#ifdef I_SYS_TYPES
#  include <sys/types.h>
#endif
#ifdef I_UNISTD
#  include <unistd.h>
#endif
#ifdef I_TIME
#  include <time.h>
#endif
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <string.h>
#ifdef I_MALLOC
#  include <malloc.h>
#endif
int main()
{
    int result = 0;
    time_t t = time(0L);
    char w_tz[]="TZ" "=GMT+5",
	 e_tz[]="TZ" "=GMT-5",
	*tz_e = (char*)malloc(16),
	*tz_w = (char*)malloc(16);
    struct tm tm_e, tm_w;
    memset(&tm_e,'\0',sizeof(struct tm));
    memset(&tm_w,'\0',sizeof(struct tm));
    strcpy(tz_e,e_tz);
    strcpy(tz_w,w_tz);

    putenv(tz_e);
    localtime_r(&t, &tm_e);

    putenv(tz_w);
    localtime_r(&t, &tm_w);

    if( memcmp(&tm_e, &tm_w, sizeof(struct tm)) == 0 )
	result = 1;

    free(tz_e);free(tz_w);
    return result;
}
EOCP
	set try
	if eval $compile; then
	    if $run ./try; then
		d_localtime_r_needs_tzset=undef;
	    else
		d_localtime_r_needs_tzset=define;
	    fi;
	else
	    d_localtime_r_needs_tzset=undef;
	fi;
     ;;
  *)
     d_localtime_r_needs_tzset=undef;
     ;;
esac
$rm_try

: see if lockf exists
set lockf d_lockf
eval $inlibc

: see if log1p exists
set log1p d_log1p
eval $inlibc

: see if log2 exists
set log2 d_log2
eval $inlibc

: see if logb exists
set logb d_logb
eval $inlibc

: see if lrint exists
set lrint d_lrint
eval $inlibc

: see if lrintl exists
set lrintl d_lrintl
eval $inlibc

: see if lround exists
set lround d_lround
eval $inlibc

: see if lroundl exists
set lroundl d_lroundl
eval $inlibc

: see if prototype for lseek is available
echo " "
set d_lseekproto lseek $i_systypes sys/types.h $i_unistd unistd.h
eval $hasproto

: see if lstat exists
set lstat d_lstat
eval $inlibc

: see if madvise exists
set madvise d_madvise
eval $inlibc

: see if malloc_size exists
set malloc_size d_malloc_size
eval $inlibc

: see if malloc_size_good exists
set malloc_good_size d_malloc_good_size
eval $inlibc

: see if malloc_usable_size exists
set malloc_usable_size d_malloc_usable_size
eval $inlibc

: see if mblen exists
set mblen d_mblen
eval $inlibc

: see if mbrlen exists
set mbrlen d_mbrlen
eval $inlibc

: see if mbrtowc exists
set mbrtowc d_mbrtowc
eval $inlibc

: see if mbstowcs exists
set mbstowcs d_mbstowcs
eval $inlibc

: see if mbtowc exists
set mbtowc d_mbtowc
eval $inlibc

: see if memmem exists
: We need both a prototype in string.h and the symbol in libc.
echo " "
d_memmem_proto=''
xx1="#$d_gnulibc HAS_GNULIBC"
xx2='#if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)'
xx3='#   define _GNU_SOURCE'
xx4='#endif'
set d_memmem_proto memmem literal "$xx1" literal "$xx2" literal "$xx3" literal "$xx4" define string.h
eval $hasproto
case "$d_memmem_proto" in
    define) # see if memmem exists
	set memmem d_memmem
	eval $inlibc
	;;
    *)  val=$undef
	set d_memmem
	eval $setvar
	;;
esac

: see if memrchr exists
: We need both a prototype in string.h and the symbol in libc.
echo " "
d_memrchr_proto=''
xx1="#$d_gnulibc HAS_GNULIBC"
xx2='#if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)'
xx3='#   define _GNU_SOURCE'
xx4='#endif'
set d_memrchr_proto memrchr literal "$xx1" literal "$xx2" literal "$xx3" literal "$xx4" define string.h
eval $hasproto
case "$d_memrchr_proto" in
    define) # see if memrchr exists
	set memrchr d_memrchr
	eval $inlibc
	;;
    *)  val=$undef
	set d_memrchr
	eval $setvar
	;;
esac

: see if mkdir exists
set mkdir d_mkdir
eval $inlibc

: see if mkdtemp exists
set mkdtemp d_mkdtemp
eval $inlibc

: see if mkfifo exists
set mkfifo d_mkfifo
eval $inlibc

: see if mkostemp exists
set mkostemp d_mkostemp
eval $inlibc

: see if mkstemp exists
set mkstemp d_mkstemp
eval $inlibc

: see if mkstemps exists
set mkstemps d_mkstemps
eval $inlibc

: see if mktime exists
set mktime d_mktime
eval $inlibc

: see if sys/mman.h has to be included
set sys/mman.h i_sysmman
eval $inhdr

: see if mmap exists
set mmap d_mmap
eval $inlibc
: see what shmat returns
: default to something harmless
mmaptype='void *'
case "$i_sysmman$d_mmap" in
"$define$define")
	$cat >mmap.c <<'END'
#include <sys/mman.h>
void *mmap();
END
	if $cc $ccflags -c mmap.c >/dev/null 2>&1; then
		mmaptype='void *'
	else
		mmaptype='caddr_t'
	fi
	echo "and it returns ($mmaptype)." >&4
	;;
esac

: see if sqrtl exists
set sqrtl d_sqrtl
eval $inlibc

: see if scalbnl exists
set scalbnl d_scalbnl
eval $inlibc

: see if truncl exists
set truncl d_truncl
eval $inlibc

: see if modfl exists
set modfl d_modfl
eval $inlibc

: see if prototype for modfl is available
echo " "
set d_modflproto modfl define math.h
eval $hasproto

if $test "$uselongdouble" = "$define"; then
    message=""
    if $test "$d_sqrtl" != "$define"; then
	message="$message sqrtl"
    fi
    if $test "$d_modfl" != "$define"; then
	if $test "$d_truncl:$d_copysignl" = "$define:$define"; then
	    echo "You have both truncl and copysignl, so I can emulate modfl."
	else
	    if $test "$d_aintl:$d_copysignl" = "$define:$define"; then
		echo "You have both aintl and copysignl, so I can emulate modfl."
	    else
		message="$message modfl"
	    fi
	fi
    fi
    if $test "$d_frexpl" != "$define"; then
	if $test "$d_ilogbl:$d_scalbnl" = "$define:$define"; then
	    echo "You have both ilogbl and scalbnl, so I can emulate frexpl."
	else
	    message="$message frexpl"
	fi
    fi
    if $test "$d_ldexpl" != "$define"; then
	message="$message ldexpl"
    fi

    if $test "$message" != ""; then
	$cat <<EOM >&4

*** You requested the use of long doubles but you do not seem to have
*** the following mathematical functions needed for long double support:
***    $message
*** Please rerun Configure without -Duselongdouble and/or -Dusemorebits.
*** Cannot continue, aborting.

EOM

	exit 1
    fi
fi

: see if mprotect exists
set mprotect d_mprotect
eval $inlibc

: see if msgctl exists
set msgctl d_msgctl
eval $inlibc

: see if msgget exists
set msgget d_msgget
eval $inlibc

: see if msgsnd exists
set msgsnd d_msgsnd
eval $inlibc

: see if msgrcv exists
set msgrcv d_msgrcv
eval $inlibc

: see how much of the 'msg*(2)' library is present.
h_msg=true
echo " "
case "$d_msgctl$d_msgget$d_msgsnd$d_msgrcv" in
*"$undef"*) h_msg=false;;
esac
case "$osname" in
freebsd)
    case "`ipcs 2>&1`" in
    "SVID messages"*"not configured"*)
	echo "Your $osname does not have the msg*(2) configured." >&4
        h_msg=false
	val="$undef"
	set msgctl d_msgctl
	eval $setvar
	set msgget d_msgget
	eval $setvar
	set msgsnd d_msgsnd
	eval $setvar
	set msgrcv d_msgrcv
	eval $setvar
	;;
    esac
    ;;
esac
: we could also check for sys/ipc.h ...
if $h_msg && $test `./findhdr sys/msg.h`; then
	echo "You have the full msg*(2) library." >&4
	val="$define"
else
	echo "You don't have the full msg*(2) library." >&4
	val="$undef"
fi
set d_msg
eval $setvar

: Check for msghdr_s
echo " "
echo "Checking to see if your system supports struct msghdr..." >&4
set d_msghdr_s msghdr $i_systypes sys/types.h $d_socket sys/socket.h $i_sysuio sys/uio.h
eval $hasstruct
case "$d_msghdr_s" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac

: see if msync exists
set msync d_msync
eval $inlibc

: see if munmap exists
set munmap d_munmap
eval $inlibc

: see if nan exists
set nan d_nan
eval $inlibc

: see if nanosleep exists
set nanosleep d_nanosleep
eval $inlibc

: see if nearbyint exists
set nearbyint d_nearbyint
eval $inlibc

: see if nextafter exists
set nextafter d_nextafter
eval $inlibc

: see if nexttoward exists
set nexttoward d_nexttoward
eval $inlibc

: see if nice exists
set nice d_nice
eval $inlibc

: see if this is a langinfo.h system
set langinfo.h i_langinfo
eval $inhdr

: see if nl_langinfo and/or nl_langinfo_l exist
set nl_langinfo d_nl_langinfo
eval $inlibc
set nl_langinfo_l d_nl_langinfo_l
eval $inlibc

: Look for non 'int'-sized bitfields
case "$d_non_int_bitfields" in
'')
echo " " >&4
echo "Checking whether your compiler can handle struct bitfields that aren't 'int' or 'unsigned int' ..." >&4
$cat >try.c <<'EOCP'
#include <stdio.h>
struct foo {
    unsigned char byte:1;
    unsigned short halfword:1;
} bar;
EOCP
if $cc $ccflags -c try.c >try.out 2>&1 ; then
	if $compiler_warning try.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't support struct bitfields that aren't 'int' or 'unsigned int'." >&4
		val="$undef"
	else
		echo "Your C compiler supports struct bitfields besides 'int' and 'unsigned int'." >&4
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand struct bitfields that aren't 'int' or 'unsigned int' at all." >&4
	val="$undef"
fi
;;
*) val="$d_non_int_bitfields" ;;
esac
set d_non_int_bitfields
eval $setvar
$rm_try

: see if this is a quadmath.h system
set quadmath.h i_quadmath
eval $inhdr

: Check basic sizes
echo " "
$echo "Choosing the C types to be used for Perl's internal types..." >&4

case "$use64bitint:$d_quad:$quadtype" in
define:define:?*)
	ivtype="$quadtype"
	uvtype="$uquadtype"
	ivsize=8
	uvsize=8
	;;
*)	ivtype="long"
	uvtype="unsigned long"
	ivsize=$longsize
	uvsize=$longsize
	;;
esac

if test $ivsize -lt $ptrsize; then
    echo "Re-run Configure adding -Duse64bitint so as to make integers as large as pointer values" >&4
    exit 1
fi

case "$uselongdouble:$d_longdbl" in
define:define)
	nvtype="long double"
	nvsize=$longdblsize
	;;
*)	nvtype=double
	nvsize=$doublesize
	;;
esac

case "$usequadmath:$i_quadmath" in
define:define)
  nvtype="__float128"
  nvsize=16
  : libquadmath is not in the usual places, and the place
  : changes if the compiler is upgraded.  So ask the compiler if it
  : can find it.
  : We do not need to save this, if it fails we abort.
  libs="$libs -lquadmath"
  set try
  $cat >try.c <<EOM
#include <quadmath.h>
#include <stdio.h>
int main(int argc, char *argv[]) {
  __float128 x = 1.0;
  if (fabsq(logq(x)) > 1e-6) {
     fputs("quadmath is broken\n", stderr);
     return 1;
  }
  puts("define");
  return 0;
}
EOM
  yyy=''
  if eval $compile_ok; then
      yyy=`$run ./try`
      case "$yyy" in
      define) ;;
      *) cat <<EOM >&4

*** You requested the use of the quadmath library, but
*** it appears to be nonfunctional.
*** Cannot continue, aborting.

EOM
       exit 1
       ;;
       esac
  else
      $cat <<EOM >&4

*** You requested the use of the quadmath library, but you
*** do not seem to have the quadmath library installed.
*** Cannot continue, aborting.
EOM
    exit 1
  fi
  ;;
define:*) $cat <<EOM >&4

*** You requested the use of the quadmath library, but you
*** do not seem to have the required header, <quadmath.h>.
EOM
  case "$gccversion" in
  [23].*|4.[0-5]*)
   $cat <<EOM >&4
*** Your gcc looks a bit old:
*** $gccversion
EOM
    ;;
  '')
   $cat <<EOM >&4
*** You are not running a gcc.
EOM
    ;;
  esac
  $cat <<EOM >&4
*** For the quadmath library you need at least gcc 4.6.
*** Cannot continue, aborting.
EOM
  exit 1
  ;;
esac

$echo "(IV will be "$ivtype", $ivsize bytes)"
$echo "(UV will be "$uvtype", $uvsize bytes)"
$echo "(NV will be "$nvtype", $nvsize bytes)"

$cat >try.c <<EOCP
#$i_inttypes I_INTTYPES
#ifdef I_INTTYPES
#include <inttypes.h>
#endif
#include <stdio.h>
int main() {
#ifdef INT8
   int8_t i =  INT8_MAX;
  uint8_t u = UINT8_MAX;
  printf("int8_t\n");
#endif
#ifdef INT16
   int16_t i =  INT16_MAX;
  uint16_t u = UINT16_MAX;
  printf("int16_t\n");
#endif
#ifdef INT32
   int32_t i =  INT32_MAX;
  uint32_t u = UINT32_MAX;
  printf("int32_t\n");
#endif
}
EOCP

i8type="signed char"
u8type="unsigned char"
i8size=1
u8size=1

case "$i16type" in
'')	case "$shortsize" in
	2)	i16type=short
		u16type="unsigned short"
		i16size=$shortsize
		u16size=$shortsize
		;;
	esac
	;;
esac
case "$i16type" in
'')	set try -DINT16
	if eval $compile; then
		case "`$run ./try`" in
		int16_t)
			i16type=int16_t
			u16type=uint16_t
			i16size=2
			u16size=2
			;;
		esac
	fi
	;;
esac
case "$i16type" in
'')	if $test $shortsize -ge 2; then
		i16type=short
		u16type="unsigned short"
		i16size=$shortsize
		u16size=$shortsize
	fi
	;;
esac

case "$i32type" in
'')	case "$longsize" in
	4)	i32type=long
		u32type="unsigned long"
		i32size=$longsize
		u32size=$longsize
		;;
	*)	case "$intsize" in
		4)	i32type=int
			u32type="unsigned int"
			i32size=$intsize
			u32size=$intsize
			;;
		esac
		;;
	esac
	;;
esac
case "$i32type" in
'')	set try -DINT32
	if eval $compile; then
		case "`$run ./try`" in
		int32_t)
			i32type=int32_t
			u32type=uint32_t
			i32size=4
			u32size=4
			;;
		esac
	fi
	;;
esac
case "$i32type" in
'')	if $test $intsize -ge 4; then
		i32type=int
		u32type="unsigned int"
		i32size=$intsize
		u32size=$intsize
	fi
	;;
esac

case "$i64type" in
'')	case "$d_quad:$quadtype" in
	define:?*)
		i64type="$quadtype"
		u64type="$uquadtype"
		i64size=8
		u64size=8
		;;
	esac
	;;
esac

$echo "Checking how many bits of your UVs your NVs can preserve..." >&4
$cat <<EOP >try.c
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_inttypes I_INTTYPES
#ifdef I_INTTYPES
#include <inttypes.h>
#endif
#include <sys/types.h>
#include <signal.h>
#ifdef SIGFPE
/* volatile so that the compiler has to store it out to memory */
volatile int bletched = 0;
$signal_t blech(int s) { bletched = 1; }
#endif
int main() {
    $uvtype u = 0;
    $nvtype d;
    int     n = 8 * $uvsize;
    int     i;
#ifdef SIGFPE
    signal(SIGFPE, blech);
#endif

    for (i = 0; i < n; i++) {
      u = u << 1 | ($uvtype)1;
      d = ($nvtype)u;
      if (($uvtype)d != u)
        break;
      if (d <= 0)
	break;
      d = ($nvtype)(u - 1);
      if (($uvtype)d != (u - 1))
        break;
#ifdef SIGFPE
      if (bletched)
	break;
#endif
    }
    printf("%d\n", ((i == n) ? -n : i));
    exit(0);
}
EOP
set try

d_nv_preserves_uv="$undef"
if eval $compile; then
	nv_preserves_uv_bits="`$run ./try`"
fi
case "$nv_preserves_uv_bits" in
\-[1-9]*)
	nv_preserves_uv_bits=`expr 0 - $nv_preserves_uv_bits`
	$echo "Your NVs can preserve all $nv_preserves_uv_bits bits of your UVs."  >&4
	d_nv_preserves_uv="$define"
	;;
[1-9]*)	$echo "Your NVs can preserve only $nv_preserves_uv_bits bits of your UVs."  >&4
	d_nv_preserves_uv="$undef" ;;
*)	$echo "Can't figure out how many bits your NVs preserve." >&4
	nv_preserves_uv_bits="0" ;;
esac
$rm_try

$echo "Checking to find the largest integer value your NVs can hold..." >&4
$cat <<EOP >try.c
#include <stdio.h>

typedef $nvtype NV;

int
main() {
  NV value = 2;
  int count = 1;

  while(count < 256) {
    /* volatile so that the compiler has to store it out to memory */
    volatile NV up = value + 1.0;
    volatile NV negated = -value;
    volatile NV down = negated - 1.0;
    volatile NV got_up = up - value;
    int up_good = got_up == 1.0;
    int got_down = down - negated;
    int down_good = got_down == -1.0;

    if (down_good != up_good) {
      fprintf(stderr,
	      "Inconsistency - up %d %f; down %d %f; for 2**%d (%.20f)\n",
	      up_good, (double) got_up, down_good, (double) got_down,
	      count, (double) value);
      return 1;
    }
    if (!up_good) {
      while (1) {
	if (count > 8) {
	  count -= 8;
	  fputs("256.0", stdout);
	} else {
	  count--;
	  fputs("2.0", stdout);
	}
	if (!count) {
	  puts("");
	  return 0;
	}
	fputs("*", stdout);
      }
    }
    value *= 2;
    ++count;
  }
  fprintf(stderr, "Cannot overflow integer range, even at 2**%d (%.20f)\n",
	  count, (double) value);
  return 1;
}
EOP
set try

nv_overflows_integers_at='0'
if eval $compile; then
    xxx="`$run ./try`"
    case "$?" in
	0)
	    case "$xxx" in
		2*)  cat >&4 <<EOM
The largest integer your NVs can preserve is equal to $xxx
EOM
		    nv_overflows_integers_at="$xxx"
		    ;;
		*)  cat >&4 <<EOM
Cannot determine the largest integer value your NVs can hold, unexpected output
'$xxx'
EOM
		    ;;
	    esac
	    ;;
	*)  cat >&4 <<EOM
Cannot determine the largest integer value your NVs can hold
EOM
	    ;;
    esac
fi
$rm_try

$echo "Checking whether NV 0.0 is all bits zero in memory..." >&4
$cat <<EOP >try.c
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <string.h>
#include <sys/types.h>
#include <signal.h>
#ifdef SIGFPE
/* volatile so that the compiler has to store it out to memory */
volatile int bletched = 0;
$signal_t blech(int s) { bletched = 1; }
#endif

int checkit($nvtype d, const char *where) {
    void *v = &d;
    unsigned char *p = (unsigned char *)v;
    unsigned char *end = p + sizeof(d);
    int fail = 0;

    while (p < end)
	fail += *p++;

    if (!fail)
	return 0;

    p = (unsigned char *)v;
    printf("No - %s: 0x", where);
    while (p < end)
	printf ("%02X", *p++);
    printf("\n");
    return 1;
}

int main(int argc, char **argv) {
    $nvtype d = 0.0;
    int fail = 0;
    fail += checkit(d, "0.0");

    /* The compiler shouldn't be assuming that bletched is 0  */
    d = bletched;

    fail += checkit(d, "bleched");

#ifdef SIGFPE
    signal(SIGFPE, blech);
#endif

    /* Paranoia - the compiler should have no way of knowing that ANSI says
       that argv[argc] will always be NULL.  Actually, if it did assume this it
       would be buggy, as this is C and main() can be called from elsewhere in
       the program.  */
    d = argv[argc] ? 1 : 0;

    if (d) {
	printf("Odd argv[argc]=%p, d=%g\n", argv[argc], d);
    }

    fail += checkit(d, "ternary");

    memset(&d, sizeof(d), argv[argc] ? 1 : 0);

    if (d != 0.0) {
	printf("No - memset doesn't give 0.0\n");
	/* This might just blow up:  */
	printf("(gives %g)\n", d);
	return 1;
    }

#ifdef SIGFPE
    if (bletched) {
	printf("No - something bleched\n");
	return 1;
    }
#endif
    if (fail) {
      printf("No - %d fail(s)\n", fail);
      return 1;
    }
    printf("Yes\n");
    return 0;
}
EOP
set try

d_nv_zero_is_allbits_zero="$undef"
if eval $compile; then
    xxx="`$run ./try`"
    case "$?" in
	0)
	    case "$xxx" in
		Yes)  cat >&4 <<EOM
0.0 is represented as all bits zero in memory
EOM
		    d_nv_zero_is_allbits_zero="$define"
		    ;;
		*)  cat >&4 <<EOM
0.0 is not represented as all bits zero in memory
EOM
		    d_nv_zero_is_allbits_zero="$undef"
		    ;;
	    esac
	    ;;
	*)  cat >&4 <<EOM
0.0 is not represented as all bits zero in memory
EOM
	    d_nv_zero_is_allbits_zero="$undef"
	    ;;
    esac
fi
$rm_try

: check for off64_t
echo " "
echo "Checking to see if you have off64_t..." >&4
$cat >try.c <<EOCP
#include <sys/types.h>
#include <unistd.h>
int main() { off64_t x = 7; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have off64_t."
else
	val="$undef"
	echo "You do not have off64_t."
	case "$lseeksize" in
	8) echo "(Your off_t is 64 bits, so you could use that.)" ;;
	esac
fi
$rm_try
set d_off64_t
eval $setvar

: how to create joinable pthreads
if test "X$usethreads" = "X$define" -a "X$i_pthread" = "X$define"; then
	echo " "
	echo "Checking what constant to use for creating joinable pthreads..." >&4
	$cat >try.c <<'EOCP'
#include <pthread.h>
int main() {
    int detachstate = JOINABLE;
}
EOCP
	set try -DJOINABLE=PTHREAD_CREATE_JOINABLE
	if eval $compile; then
		echo "You seem to use PTHREAD_CREATE_JOINABLE." >&4
		val="$undef" # Yes, undef.
		set d_old_pthread_create_joinable
		eval $setvar
		val=""
		set old_pthread_create_joinable
		eval $setvar
	else
		set try -DJOINABLE=PTHREAD_CREATE_UNDETACHED
		if eval $compile; then
			echo "You seem to use PTHREAD_CREATE_UNDETACHED." >&4
			val="$define"
			set d_old_pthread_create_joinable
			eval $setvar
			val=PTHREAD_CREATE_UNDETACHED
			set old_pthread_create_joinable
			eval $setvar
		else
			set try -DJOINABLE=__UNDETACHED
			if eval $compile; then
				echo "You seem to use __UNDETACHED." >&4
				val="$define"
				set d_old_pthread_create_joinable
				eval $setvar
				val=__UNDETACHED
				set old_pthread_create_joinable
				eval $setvar
			else
				echo "Egads, nothing obvious found.  Guessing that you use 0." >&4
				val="$define"
				set d_old_pthread_create_joinable
				eval $setvar
				val=0
				set old_pthread_create_joinable
				eval $setvar
			fi
		fi
	fi
	$rm_try
else
    d_old_pthread_create_joinable="$undef"
    old_pthread_create_joinable=""
fi

: see if pause exists
set pause d_pause
eval $inlibc

: see if locale.h is available
set locale.h i_locale
eval $inhdr

: see if this system has wctype.h
set wctype.h i_wctype
eval $inhdr

: see if towupper exists
set towupper d_towupper
eval $inlibc

: check for setlocale function and behavior
case "$d_setlocale" in
'')
$cat >&4 <<EOM

Checking to see if you have setlocale() and its behavior
EOM
$cat >try.c <<EOCP
#include <stdlib.h>
#include <string.h>
#$i_locale I_LOCALE
#ifdef I_LOCALE
#  include <locale.h>
#endif
#$i_wctype I_WCTYPE
#ifdef I_WCTYPE
#  include <wctype.h>
#endif

int main() {
    const char * invalid_name = "\a";   /* This is really invalid! */
    int accepts_any_locale_name = 0;
    int has_C_UTF8 = 0;
    unsigned char bad_setlocale = 255;

    /* If LC_CTYPE isn't defined the compilation will fail, and locales will be
     * disabled.  It's hard to imagine an instance where meaningful locale
     * handling could be done without LC_CTYPE */
    const char *  name = setlocale(LC_CTYPE, "C");

    if (name == NULL || strcmp(name, "C") != 0) {
        exit(bad_setlocale);
    }

    name = setlocale(LC_CTYPE, invalid_name);
    if (name != NULL) {

        /* Let it pass if it accepts the name but gives back one of the C
         * locales */
        if (strcmp(name, "C") != 0 && strcmp(name, "C.UTF-8") != 0) {
            accepts_any_locale_name = 1;
        }
    }

    name = setlocale(LC_CTYPE, "C.UTF-8");
    if (name != NULL) {
        unsigned char y_with_diaeresis = ('A' == 193) ? 0xDF : 0xFF;

#$d_towupper HAS_TOWUPPER
#ifdef HAS_TOWUPPER

        /* We assume that if the machine doesn't have the C99 towupper, it
         * doesn't have C.UTF-8, even if we successfully changed locales to
         * include it.  This seems safer even on platforms that didn't accept
         * the really invalid name */

        if (towupper(y_with_diaeresis) == 0x178) {
            has_C_UTF8 = 1;
        }

#endif

    }

    exit( 0 /* (separator - min_separator) << 3
        | uses_name_value_pair_names      << 2
          */
        | has_C_UTF8                      << 1
        | accepts_any_locale_name);

}
EOCP
val=
set d_setlocale
eval $setvar
case $d_setlocale in
    $undef) d_setlocale_accepts_any_locale_name="$undef"
            d_has_C_UTF8="false"
            ;;
    *) set try
       if eval $compile; then
           echo "Your system has setlocale()..." >&4
           $run ./try
           case $? in
               0) echo "and it seems sane; you don't have a C.UTF-8 locale" >&4
                  d_setlocale="$define"
                  d_setlocale_accepts_any_locale_name="$undef"
                  d_has_C_UTF8="false"
                  ;;
               1) echo "and it seems sane, but accepts any locale name as valid" >&4
                  d_setlocale="$define"
                  d_setlocale_accepts_any_locale_name="$define"
                  d_has_C_UTF8="false"
                  ;;
               2) echo "and it seems sane; you have a C.UTF-8 locale" >&4
                  d_setlocale="$define"
                  d_setlocale_accepts_any_locale_name="$undef"
                  d_has_C_UTF8="true"
                  ;;
               3) echo "and it seems sane, but accepts any locale name as valid" >&4
                  d_setlocale="$define"
                  d_setlocale_accepts_any_locale_name="$define"
                  d_has_C_UTF8="true"
                  ;;
               *) echo "but it doesn't seem to work, so we won't use it." >&4
                  d_setlocale="$undef"
                  d_setlocale_accepts_any_locale_name="$undef"
                  d_has_C_UTF8="false"
                  ;;
           esac
       else
           echo "your system does not have setlocale()" >&4
           d_setlocale="$undef"
           d_setlocale_accepts_any_locale_name="$undef"
           d_has_C_UTF8="false"
       fi
esac
$rm_try
;;
*) val="$d_setlocale"
    set d_setlocale
    eval $setvar
    case "$d_setlocale" in
        $undef) echo "There may be other ways to set the locale on your system, so we need to ask:" >&4
        ;;
    esac
    rp="Does your system have the C.UTF-8 locale?"
    dflt=n
    . ./myread
    case "$ans" in
        [Yy]*) d_has_C_UTF8="true"
               c_utf8_locale=" or C.UTF-8"
               ;;
        *)     d_has_C_UTF8="false"
               c_utf8_locale=""
               ;;
    esac
    case "$d_setlocale" in
        $define)
            rp="When you set your locale to something besides C$c_utf8_locale, does it actually do so? (Answer no if it just pretends to set it)" >&4
            dflt=n
            . ./myread
            case "$ans" in
                true|[Yy]*)
		   d_setlocale_accepts_any_locale_name="$define"
		   ;;
		*) d_setlocale_accepts_any_locale_name="$undef"
		   ;;
            esac
            ;;
        *) d_setlocale_accepts_any_locale_name="$undef"
	   ;;
    esac
esac

case "$perl_lc_all_separator$perl_lc_all_category_positions_init" in
  "")
    : Check the syntax of LC_ALL when categories are set to different locales
    echo " "
    $echo "Checking the syntax of LC_ALL when categories are set to different locales..." >&4

    case $d_setlocale in
      $define)
        $rm -f try try.*
        $cat >try.c <<'EOF'
#include <limits.h>
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#ifndef LC_ALL

int
main (const int argc, const char ** argv)
{
}

#else
#  define C_ARRAY_LENGTH(a)  (sizeof(a)/sizeof((a)[0]))
#  define strEQ(s1,s2) (strcmp(s1,s2) == 0)
#  define strNE(s1,s2) (strcmp(s1,s2) != 0)
#  define Copy(s,d,n,t) (void)memcpy((char*)(d),(const char*)(s), (n) * sizeof(t))
#  define memEQ(s1,s2,l) (memcmp(((const void *) (s1)), ((const void *) (s2)), l) == 0)
#  define memNE(s1,s2,l) (! memEQ(s1,s2,l))

int
main (const int argc, const char ** argv)
{

    int debug = 0;

    /* All categories Perl knows about on any system.  If any are missing, this
     * won't work for that system, and they must be added here and in perl.h,
     * locale.c */
    const int categories[] = {

#  ifdef LC_CTYPE
        LC_CTYPE,
#  endif
#  ifdef LC_NUMERIC
        LC_NUMERIC,
#  endif
#  ifdef LC_COLLATE
        LC_COLLATE,
#  endif
#  ifdef LC_TIME
        LC_TIME,
#  endif
#  ifdef LC_MESSAGES
        LC_MESSAGES,
#  endif
#  ifdef LC_MONETARY
        LC_MONETARY,
#  endif
#  ifdef LC_ADDRESS
        LC_ADDRESS,
#  endif
#  ifdef LC_IDENTIFICATION
        LC_IDENTIFICATION,
#  endif
#  ifdef LC_MEASUREMENT
        LC_MEASUREMENT,
#  endif
#  ifdef LC_PAPER
        LC_PAPER,
#  endif
#  ifdef LC_TELEPHONE
        LC_TELEPHONE,
#  endif
#  ifdef LC_NAME
        LC_NAME,
#  endif
#  ifdef LC_SYNTAX
        LC_SYNTAX,
#  endif
#  ifdef LC_TOD
        LC_TOD
#  endif

    };

    const char * category_names[] = {

#  ifdef LC_CTYPE
        "LC_CTYPE",
#  endif
#  ifdef LC_NUMERIC
        "LC_NUMERIC",
#  endif
#  ifdef LC_COLLATE
        "LC_COLLATE",
#  endif
#  ifdef LC_TIME
        "LC_TIME",
#  endif
#  ifdef LC_MESSAGES
        "LC_MESSAGES",
#  endif
#  ifdef LC_MONETARY
        "LC_MONETARY",
#  endif
#  ifdef LC_ADDRESS
        "LC_ADDRESS",
#  endif
#  ifdef LC_IDENTIFICATION
        "LC_IDENTIFICATION",
#  endif
#  ifdef LC_MEASUREMENT
        "LC_MEASUREMENT",
#  endif
#  ifdef LC_PAPER
        "LC_PAPER",
#  endif
#  ifdef LC_TELEPHONE
        "LC_TELEPHONE",
#  endif
#  ifdef LC_NAME
        "LC_NAME",
#  endif
#  ifdef LC_SYNTAX
        "LC_SYNTAX",
#  endif
#  ifdef LC_TOD
        "LC_TOD"
#  endif

    };

    char alternate[1024] = { '\0' } ;

    /* This is a list of locales that are likely to be found on any machine
     * (Windows and non-Windows) */
    const char * candidates[] = {
                                  "POSIX",
                                  "C.UTF-8",
                                  "en_US",
                                  "en_US.UTF-8",
                                  "American",
                                  "English"
                                };
    char separator[1024];
    size_t separator_len = 0;
    unsigned int distincts_count = 0;

    /* We look through the candidates for one which returns the same non-C
     * locale for every category */
    for (unsigned int i = 0; i < C_ARRAY_LENGTH(candidates); i++) {
        const char * candidate = candidates[i];
        distincts_count = 0;
        alternate[0] = '\0';

        for (unsigned int j = 0; j < C_ARRAY_LENGTH(categories); j++) {
            const int category = categories[j];
            const char * locale_name = setlocale(category, candidate);

            if (locale_name == NULL) {  /* Not on this system */
                break;
            }

            if (debug) fprintf(stderr,
                               "i=%d,j=%d;"
                               " Return of setlocale(%d=%s, '%s') is '%s'\n",
                               i, j,
                               category, category_names[j],
                               candidate, locale_name);

            /* If the candidate is indistinguishable from C, break to try the
             * next candidate */
            if (strEQ(locale_name, "C")) {
                break;
            }

            /* Save the name the first time through, and on subsequent ones */
            /* make sure the name is the same as before, so the code below can
             * be assured of finding it when searching */
            if (j == 0) {
                strncpy(alternate, locale_name, sizeof(alternate));
            }
            else if (strNE(alternate, locale_name)) {
                break;
            }

            distincts_count++;
        }

        /* Done with this candidate.  If every category returned the same non-C
         * name, this candidate works.  It not, loop to try the next candidate
         * */
        if (distincts_count == C_ARRAY_LENGTH(categories)) {
            break;
        }
    }

    /* Here, either found a suitable candidate, or exhausted the possibilities.
     * In the latter case, give up */
    if (distincts_count < C_ARRAY_LENGTH(categories)) {
        fprintf(stderr, "Couldn't find a locale distinguishable from C\n");
        return 1;
    }

    /* An example syntax, from cygwin, is:
     *     LC_COLLATE/LC_CTYPE/LC_MONETARY/LC_NUMERIC/LC_TIME/LC_MESSAGES
     * The locales for a given category are always in the same position,
     * indicated above, with a slash separating them */

    int map_LC_ALL_position_to_category[C_ARRAY_LENGTH(categories)];

    /* Initialize */
    for (unsigned int i = 0; i < C_ARRAY_LENGTH(categories); i++) {
        map_LC_ALL_position_to_category[i] = INT_MAX;
    }

    const char * lc_all = NULL;

    /* We need to find the category that goes in each position */
    for (unsigned int i = 0; i < C_ARRAY_LENGTH(categories); i++) {

        /* First set everything to 'C' */
        if (! setlocale(LC_ALL, "C")) {
            fprintf(stderr, "Failed to set LC_ALL to C\n");
            return 1;
        }

        /* Then set this category to the alternate */
        if (! setlocale(categories[i], alternate)) {
            fprintf(stderr, "Failed to set %d to to '%s'\n",
                            categories[i], alternate);
            return 1;
        }

        /* Then find what the system says LC_ALL looks like with just this one
         * category not set to 'C' */
        lc_all = setlocale(LC_ALL, NULL);
        if (! lc_all) {
            fprintf(stderr, "Failed to retrieve LC_ALL\n");
            return 1;
        }

        if (debug) fprintf(stderr, "LC_ALL is '%s'\n", lc_all);

        /* Assume is name=value pairs if the result contains both an equals and
         * a semi-colon. */
        if (strchr(lc_all, '=') && strchr(lc_all, ';')) {
            fprintf(stdout, "\"=;\"\n\n");
            return 0;
        }

        /* Here isn't name=value pairs.  Find the position of the alternate */
        const char * alt_pos = strstr(lc_all, alternate);
        if (! alt_pos) {
            fprintf(stderr, "Couldn't find '%s' in '%s'\n", alternate, lc_all);
            return 1;
        }

        /* Parse the LC_ALL string from the beginning up to where the alternate
         * locale is */
        const char * s = lc_all;
        int count = 0;
        while (s < alt_pos) {

            /* Count the 'C' locales before the non-C one.  (Note the letter
             * 'C' can only occur as the entire 'C' locale, since all of them
             * are that locale before 'alt_pos') */
            const char * next_C = (const char *) memchr(s, 'C', alt_pos - s);
            if (next_C) {
                count++;
                s = next_C + 1;
                continue;
            }

            /* Here, there is no 'C' between 's' and the alternate locale, so
             * 'count' gives the total number of occurrences of 'C' in that
             * span.  If count is 0, this is the first category in an LC_ALL
             * string, and we know its position, but not the separator. */
            if (count == 0) {
                break;
            }

            /* When 'count' isn't 0,  's' points to one past the previous 'C'.
             * The separator starts here, ending just before the non-C locale.
             */

            const char * new_sep = s;
            unsigned int new_sep_len = alt_pos - s;

            /* If we don't already have a separator saved, save this as it */
            if (separator_len == 0) {
                separator_len = new_sep_len;
                Copy(s, separator, separator_len, char);
                separator[separator_len] = '\0';
            }
            else {  /* Otherwise make sure it's the same string as previously
                     * calculated */
                if (   new_sep_len != separator_len
                    || memNE(separator, new_sep, separator_len))
                {
                    fprintf(stderr, "Unexpectedly got distinct separators"
                                    " '%s' vs '%s\n", separator, new_sep);
                    return 1;
                }
            }

            /* Here, we have found the position of category[i] in LC_ALL. */
            break;

        } /* End of loop parsing the LC_ALL string */

        if (map_LC_ALL_position_to_category[count] != INT_MAX) {
            fprintf(stderr, "Categories %d and %d both appear to occupy"
                            " position %d in LC_ALL; there is something"
                            " wrong with the calculation\n",
                            categories[count], categories[i],
                            count);
            return 1;
        }

        /* Save the position of this category */
        map_LC_ALL_position_to_category[count] = categories[i];

    } /* End of loop through all the categories */

    fprintf(stdout, "\"%s\"\n{", separator);
    for (unsigned int i = 0; i < C_ARRAY_LENGTH(categories) - 1; i++) {
        fprintf(stdout, " %d,", map_LC_ALL_position_to_category[i]);
    }
    fprintf(stdout, " %d }\n", map_LC_ALL_position_to_category[
                                                C_ARRAY_LENGTH(categories) - 1]);
    return 0;

}

#endif
EOF
        set try
        if eval $compile_ok; then
            output=`$run ./try 2>/dev/null`
            separator=`echo "$output" | $sed 1q`
            case $separator in
                "\"=;\"")
                  d_perl_lc_all_uses_name_value_pairs="$define"
                  d_perl_lc_all_separator="$undef"
                    perl_lc_all_separator=
                  d_perl_lc_all_category_positions_init="$undef"
                    perl_lc_all_category_positions_init=
                    ;;
                "") d_perl_lc_all_uses_name_value_pairs="$undef"
                    d_perl_lc_all_separator="$undef"
                      perl_lc_all_separator=
                    d_perl_lc_all_category_positions_init="$undef"
                      perl_lc_all_category_positions_init=
                    ;;
                *)  d_perl_lc_all_uses_name_value_pairs="$undef"
                    d_perl_lc_all_separator="$define"
                      perl_lc_all_separator="$separator"
                    d_perl_lc_all_category_positions_init="$define"
                      perl_lc_all_category_positions_init=`echo "$output" | sed -n 2p`
                    ;;
            esac
        else
            $echo "Failed to compile lc_all probe" >&4
        fi
        $rm -f try try.*
        ;;
    *)        d_perl_lc_all_separator="$undef"
                perl_lc_all_separator=
              d_perl_lc_all_category_positions_init="$undef"
                perl_lc_all_category_positions_init=

              # No setlocale(), but using this default allows our code to
              # compile and run without having to have a bunch more #ifdef's
              d_perl_lc_all_uses_name_value_pairs="$define"
    ;;
    esac    # case on $d_setlocale
  ;;

  *)    # Has an lc_all definition passed-in
     case "$perl_lc_all_separator" in
	\"*\") ;;     # Good, enclosed in "..."
        *) echo "Adding enclosing double quotes to perl_lc_all_separator" >&4
           case "$perl_lc_all_separator" in
	      \"*) perl_lc_all_separator="$perl_lc_all_separator\"" ;;
	      *\") perl_lc_all_separator="\"$perl_lc_all_separator" ;;
	      *)     perl_lc_all_separator="\"$perl_lc_all_separator\"" ;;
            esac
     esac
     d_perl_lc_all_separator="$define"
     d_perl_lc_all_category_positions_init="$define"
     d_perl_lc_all_uses_name_value_pairs="$undef"
     ;;
esac

: see if pipe2 exists
set pipe2 d_pipe2
eval $inlibc

: see if poll exists
set poll d_poll
eval $inlibc

: see if prctl exists
set prctl d_prctl
eval $inlibc

: see if prctl supports PR_SET_NAME
d_prctl_set_name=$undef
case $d_prctl in
    $define)
	$cat >try.c <<EOM
#ifdef __ANDROID__
#include <unistd.h>
#endif
#include <sys/prctl.h>

int main (int argc, char *argv[])
{
    return (prctl (PR_SET_NAME, "Test"));
    } /* main */
EOM
	set try
	if eval $compile_ok && $run ./try; then
	    echo "Your prctl (PR_SET_NAME, ...) works"
	    d_prctl_set_name=$define
	    fi
	$rm_try
	;;
    esac

: see if readlink exists
set readlink d_readlink
eval $inlibc

: Check if there is a /proc symlink to the abs path of
: the executing program.  We will honor hints of d_procselfexe=$undef
: or procselfexe being non-empty, otherwise will try to determine both
: if we have readlink.
: AmigaOS will attempt to mount proc: aka /proc, if /proc/... is
: referenced, and AmigaOS does not have a proc filesystem anyway.
echo " "
val="$undef"
if $test "X$d_procselfexe" = Xundef; then
	procselfexe=''
elif $test "X$procselfexe" != X -a "X$procselfexe" != 'X '; then
	val="$define"
elif $test "X$d_readlink" = Xdefine; then
        : NetBSD first as /proc/self is a symlink to /proc/curproc,
        : and it feels more tidy to avoid an extra level of symlink
	set NetBSD /proc/curproc/exe Linux /proc/self/exe FreeBSD /proc/curproc/file Solaris /proc/self/path/a.out
	while test $# -gt 0; do
	    type=$1; try=$2
	    shift; shift
	    if $issymlink $try; then
		$ls -l $try > reflect
		if $contains /`basename $ls` reflect >/dev/null 2>&1; then
		    echo "You have $type-like $try."
		    procselfexe='"'$try'"'
		    val="$define"
		    : This will break out of the loop
		    set X; shift
		fi
	    fi
	done
fi
$rm -f reflect
set d_procselfexe
eval $setvar

: backward compatibility for d_hvfork
if test X$d_hvfork != X; then
	d_vfork="$d_hvfork"
	d_hvfork=''
fi
: see if there is a vfork
val=''
set vfork val
eval $inlibc

d_pseudofork=$undef

: Ok, but do we want to use it. vfork is reportedly unreliable in
: perl on Solaris 2.x, and probably elsewhere.
case "$val" in
$define)
	echo " "
	case "$usevfork" in
	false) dflt='n';;
	*) dflt='y';;
	esac
	cat <<'EOM'

Perl can only use a vfork() that doesn't suffer from strict
restrictions on calling functions or modifying global data in
the child.  For example, glibc-2.1 contains such a vfork()
that is unsuitable.  If your system provides a proper fork()
call, chances are that you do NOT want perl to use vfork().

EOM
	rp="Do you still want to use vfork()?"
	. ./myread
	case "$ans" in
	y|Y) ;;
	*)
		echo "Ok, we won't use vfork()."
		val="$undef"
		;;
	esac
	;;
esac
set d_vfork
eval $setvar
case "$d_vfork" in
$define) usevfork='true';;
*) usevfork='false';;
esac

: see whether the pthread_atfork exists
$cat >try.c <<EOP
#include <pthread.h>
#include <stdio.h>
int main() {
#ifdef  PTHREAD_ATFORK
        pthread_atfork(NULL,NULL,NULL);
#endif
}
EOP

: see if pthread_atfork exists
set try -DPTHREAD_ATFORK
if eval $compile; then
    val="$define"
else
    val="$undef"
fi
case "$usethreads" in
$define)
        case "$val" in
        $define) echo 'pthread_atfork found.' >&4        ;;
        *)       echo 'pthread_atfork NOT found.' >&4    ;;
        esac
esac
set d_pthread_atfork
eval $setvar

: see if pthread_attr_setscope exists
set pthread_attr_setscope d_pthread_attr_setscope
eval $inlibc

: see whether the various POSIXish _yields exist
$cat >try.c <<EOP
#include <pthread.h>
#include <stdio.h>
int main() {
#ifdef SCHED_YIELD
	sched_yield();
#else
#ifdef PTHREAD_YIELD
	pthread_yield();
#else
#ifdef PTHREAD_YIELD_NULL
	pthread_yield(NULL);
#endif
#endif
#endif
}
EOP
: see if sched_yield exists
set try -DSCHED_YIELD
if eval $compile; then
    val="$define"
    sched_yield='sched_yield()'
else
    val="$undef"
fi
case "$usethreads" in
$define)
	case "$val" in
	$define) echo 'sched_yield() found.' >&4	;;
	*)	 echo 'sched_yield() NOT found.' >&4	;;
	esac
esac
set d_sched_yield
eval $setvar

: see if pthread_yield exists
set try -DPTHREAD_YIELD
if eval $compile; then
    val="$define"
    case "$sched_yield" in
    '') sched_yield='pthread_yield()' ;;
    esac
else
    set try -DPTHREAD_YIELD_NULL
    if eval $compile; then
	val="$define"
	case "$sched_yield" in
	'') sched_yield='pthread_yield(NULL)' ;;
	esac
    else
	val="$undef"
    fi
fi
case "$usethreads" in
$define)
	case "$val" in
	$define) echo 'pthread_yield() found.' >&4	;;
	*)	 echo 'pthread_yield() NOT found.' >&4	;;
	esac
	;;
esac
set d_pthread_yield
eval $setvar
case "$sched_yield" in
'') sched_yield=undef ;;
esac
$rm_try

: check for ptrdiff_t
echo " "
echo "Checking to see if you have ptrdiff_t..." >&4
$cat >try.c <<EOCP
#include <stddef.h>
int main() { ptrdiff_t x = 7; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have ptrdiff_t."
else
	val="$undef"
	echo "You do not have ptrdiff_t."
fi
$rm_try
set d_ptrdiff_t
eval $setvar

: see if random_r exists
set random_r d_random_r
eval $inlibc
case "$d_random_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_stdlib stdlib.h"
	case "$d_random_r_proto:$usethreads" in
	":define")	d_random_r_proto=define
		set d_random_r_proto random_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_random_r_proto" in
	define)
	case "$random_r_proto" in
	''|0) try='int random_r(int*, struct random_data*);'
	./protochk "$extern_C $try" $hdrs && random_r_proto=I_iS ;;
	esac
	case "$random_r_proto" in
	''|0) try='int random_r(long*, struct random_data*);'
	./protochk "$extern_C $try" $hdrs && random_r_proto=I_lS ;;
	esac
	case "$random_r_proto" in
	''|0) try='int random_r(struct random_data*, int32_t*);'
	./protochk "$extern_C $try" $hdrs && random_r_proto=I_St ;;
	esac
	case "$random_r_proto" in
	''|0)	d_random_r=undef
		random_r_proto=0
		echo "Disabling random_r, cannot determine prototype." >&4 ;;
	* )	case "$random_r_proto" in
		REENTRANT_PROTO*) ;;
		*) random_r_proto="REENTRANT_PROTO_$random_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "random_r has no prototype, not using it." >&4 ;;
		esac
		d_random_r=undef
		random_r_proto=0
		;;
	esac
	;;
*)	random_r_proto=0
	;;
esac

: see if readdir and friends exist
set readdir d_readdir
eval $inlibc
set seekdir d_seekdir
eval $inlibc
set telldir d_telldir
eval $inlibc
set rewinddir d_rewinddir
eval $inlibc

: see if readdir64_r exists
set readdir64_r d_readdir64_r
eval $inlibc
case "$d_readdir64_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_dirent dirent.h"
	case "$d_readdir64_r_proto:$usethreads" in
	":define")	d_readdir64_r_proto=define
		set d_readdir64_r_proto readdir64_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_readdir64_r_proto" in
	define)
	case "$readdir64_r_proto" in
	''|0) try='int readdir64_r(DIR*, struct dirent64*, struct dirent64**);'
	./protochk "$extern_C $try" $hdrs && readdir64_r_proto=I_TSR ;;
	esac
	case "$readdir64_r_proto" in
	''|0) try='int readdir64_r(DIR*, struct dirent64*);'
	./protochk "$extern_C $try" $hdrs && readdir64_r_proto=I_TS ;;
	esac
	case "$readdir64_r_proto" in
	''|0)	d_readdir64_r=undef
		readdir64_r_proto=0
		echo "Disabling readdir64_r, cannot determine prototype." >&4 ;;
	* )	case "$readdir64_r_proto" in
		REENTRANT_PROTO*) ;;
		*) readdir64_r_proto="REENTRANT_PROTO_$readdir64_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "readdir64_r has no prototype, not using it." >&4 ;;
		esac
		d_readdir64_r=undef
		readdir64_r_proto=0
		;;
	esac
	;;
*)	readdir64_r_proto=0
	;;
esac

: see if readdir_r exists
set readdir_r d_readdir_r
eval $inlibc
case "$d_readdir_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_dirent dirent.h"
	case "$d_readdir_r_proto:$usethreads" in
	":define")	d_readdir_r_proto=define
		set d_readdir_r_proto readdir_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_readdir_r_proto" in
	define)
	case "$readdir_r_proto" in
	''|0) try='int readdir_r(DIR*, struct dirent*, struct dirent**);'
	./protochk "$extern_C $try" $hdrs && readdir_r_proto=I_TSR ;;
	esac
	case "$readdir_r_proto" in
	''|0) try='int readdir_r(DIR*, struct dirent*);'
	./protochk "$extern_C $try" $hdrs && readdir_r_proto=I_TS ;;
	esac
	case "$readdir_r_proto" in
	''|0)	d_readdir_r=undef
		readdir_r_proto=0
		echo "Disabling readdir_r, cannot determine prototype." >&4 ;;
	* )	case "$readdir_r_proto" in
		REENTRANT_PROTO*) ;;
		*) readdir_r_proto="REENTRANT_PROTO_$readdir_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "readdir_r has no prototype, not using it." >&4 ;;
		esac
		d_readdir_r=undef
		readdir_r_proto=0
		;;
	esac
	;;
*)	readdir_r_proto=0
	;;
esac

: see if readv exists
set readv d_readv
eval $inlibc

: see if recvmsg exists
set recvmsg d_recvmsg
eval $inlibc

: see if regcomp, regcmp, or re_comp exist, for regular pattern matching
echo " "
if set regcomp val -f d_regcomp; eval $csym; $val; then
	echo 'regcomp() found.' >&4
	d_regcomp="$define"
	d_regcmp="$undef"
	d_re_comp="$undef"
elif set regcmp val -f d_regcmp; eval $csym; $val; then
	echo 'regcmp() found.' >&4
	d_regcmp="$define"
	d_regcomp="$undef"
	d_re_comp="$undef"
elif set re_comp val -f d_re_comp; eval $csym; $val; then
	echo 're_comp() found, assuming re_exec() also exists.' >&4
	d_re_comp="$define"
	d_regcomp="$undef"
	d_regcmp="$undef"
else
	$cat >&4 <<EOM
No regcomp(), regcmp() nor re_comp() found !! No regular pattern matching.
EOM
	d_regcmp="$undef"
	d_re_comp="$undef"
	d_regcomp="$undef"
fi

: see if remainder exists
set remainder d_remainder
eval $inlibc

: see if remquo exists
set remquo d_remquo
eval $inlibc

: see if rename exists
set rename d_rename
eval $inlibc

: see if rint exists
set rint d_rint
eval $inlibc

: see if rmdir exists
set rmdir d_rmdir
eval $inlibc

: see if round exists
set round d_round
eval $inlibc

: see if prototype for sbrk is available
echo " "
set d_sbrkproto sbrk $i_unistd unistd.h
eval $hasproto

: see if scalbn exists
set scalbn d_scalbn
eval $inlibc

: see if select exists
set select d_select
eval $inlibc

: see if semctl exists
set semctl d_semctl
eval $inlibc

: see if semget exists
set semget d_semget
eval $inlibc

: see if semop exists
set semop d_semop
eval $inlibc

: see how much of the 'sem*(2)' library is present.
h_sem=true
echo " "
case "$d_semctl$d_semget$d_semop" in
*"$undef"*) h_sem=false;;
esac
case "$osname" in
freebsd)
    case "`ipcs 2>&1`" in
    "SVID messages"*"not configured"*)
	echo "Your $osname does not have the sem*(2) configured." >&4
        h_sem=false
	val="$undef"
	set semctl d_semctl
	eval $setvar
	set semget d_semget
	eval $setvar
	set semop d_semop
	eval $setvar
	;;
    esac
    ;;
esac
: we could also check for sys/ipc.h ...
if $h_sem && $test `./findhdr sys/sem.h`; then
	echo "You have the full sem*(2) library." >&4
	val="$define"
else
	echo "You don't have the full sem*(2) library." >&4
	val="$undef"
fi
set d_sem
eval $setvar

: see whether sys/sem.h defines union semun
echo " "
$cat > try.c <<'END'
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
int main () { union semun semun; semun.buf = 0; }
END
set try
if eval $compile; then
    echo "You have union semun in <sys/sem.h>." >&4
    val="$define"
else
    echo "You do not have union semun in <sys/sem.h>." >&4
    val="$undef"
fi
$rm_try
set d_union_semun
eval $setvar

: see how to do semctl IPC_STAT
case "$d_sem" in
$define)
    echo " "
    $cat > tryh.h <<END
#ifndef S_IRUSR
#   ifdef S_IREAD
#	define S_IRUSR S_IREAD
#	define S_IWUSR S_IWRITE
#	define S_IXUSR S_IEXEC
#   else
#	define S_IRUSR 0400
#	define S_IWUSR 0200
#	define S_IXUSR 0100
#   endif
#   define S_IRGRP (S_IRUSR>>3)
#   define S_IWGRP (S_IWUSR>>3)
#   define S_IXGRP (S_IXUSR>>3)
#   define S_IROTH (S_IRUSR>>6)
#   define S_IWOTH (S_IWUSR>>6)
#   define S_IXOTH (S_IXUSR>>6)
#endif
#ifndef S_IRWXU
#   define S_IRWXU (S_IRUSR|S_IWUSR|S_IXUSR)
#   define S_IRWXG (S_IRGRP|S_IWGRP|S_IXGRP)
#   define S_IRWXO (S_IROTH|S_IWOTH|S_IXOTH)
#endif
END
    : see whether semctl IPC_STAT can use union semun
    case "$d_semctl_semun" in
    '')
      val="$undef"
      $cat > try.c <<END
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/stat.h>
#include <stdio.h>
#include <errno.h>
#include "tryh.h"
#ifndef errno
extern int errno;
#endif
#$d_union_semun HAS_UNION_SEMUN
int main() {
    union semun
#ifndef HAS_UNION_SEMUN
    {
	int val;
	struct semid_ds *buf;
	unsigned short *array;
    }
#endif
    arg;
    int sem, st;

#if defined(IPC_PRIVATE) && defined(S_IRWXU) && defined(S_IRWXG) && defined(S_IRWXO) && defined(IPC_CREAT)
    sem = semget(IPC_PRIVATE, 1, S_IRWXU|S_IRWXG|S_IRWXO|IPC_CREAT);
    if (sem > -1) {
	struct semid_ds argbuf;
	arg.buf = &argbuf;
#	ifdef IPC_STAT
	st = semctl(sem, 0, IPC_STAT, arg);
	if (st == 0)
	    printf("semun\n");
	else
#	endif /* IPC_STAT */
	    printf("semctl IPC_STAT failed: errno = %d\n", errno);
#	ifdef IPC_RMID
	if (semctl(sem, 0, IPC_RMID, arg) != 0)
#	endif /* IPC_RMID */
	    printf("semctl IPC_RMID failed: errno = %d\n", errno);
    } else
#endif /* IPC_PRIVATE && ... */
	printf("semget failed: errno = %d\n", errno);
  return 0;
}
END
      set try
      if eval $compile; then
	  xxx=`$run ./try`
          case "$xxx" in
          semun) val="$define" ;;
          esac
      fi
      $rm_try
      set d_semctl_semun
      eval $setvar
      ;;
    esac
    case "$d_semctl_semun" in
    $define)
        echo "You can use union semun for semctl IPC_STAT." >&4
	also='also'
        ;;
    *)  echo "You cannot use union semun for semctl IPC_STAT." >&4
	also=''
        ;;
    esac

    : see whether semctl IPC_STAT can use struct semid_ds pointer
    case "$d_semctl_semid_ds" in
    '')
      val="$undef"
      $cat > try.c <<'END'
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/stat.h>
#include "tryh.h"
#include <stdio.h>
#include <errno.h>
#ifndef errno
extern int errno;
#endif
int main() {
    union semun
#ifndef HAS_UNION_SEMUN
    {
	int val;
	struct semid_ds *buf;
	unsigned short *array;
    }
#endif
    arg;
    struct semid_ds argbuf;
    int sem, st;

#if defined(IPC_PRIVATE) && defined(S_IRWXU) && defined(S_IRWXG) &&  defined(S_IRWXO) && defined(IPC_CREAT)
    sem = semget(IPC_PRIVATE, 1, S_IRWXU|S_IRWXG|S_IRWXO|IPC_CREAT);
    if (sem > -1) {
	arg.buf = &argbuf;
#	ifdef IPC_STAT
	st = semctl(sem, 0, IPC_STAT, arg);
	if (st == 0)
	    printf("semid_ds\n");
	else
#	endif /* IPC_STAT */
	    printf("semctl IPC_STAT failed: errno = %d\n", errno);
#	ifdef IPC_RMID
	if (semctl(sem, 0, IPC_RMID, arg) != 0)
#	endif /* IPC_RMID */
	    printf("semctl IPC_RMID failed: errno = %d\n", errno);
    } else
#endif /* IPC_PRIVATE && ... */
	printf("semget failed: errno = %d\n", errno);

    return 0;
}
END
      set try
      if eval $compile; then
          xxx=`$run ./try`
          case "$xxx" in
          semid_ds) val="$define" ;;
          esac
      fi
      $rm_try
      set d_semctl_semid_ds
      eval $setvar
      ;;
    esac
    case "$d_semctl_semid_ds" in
    $define)
        echo "You can $also use struct semid_ds* for semctl IPC_STAT." >&4
        ;;
    *)  echo "You cannot use struct semid_ds* for semctl IPC_STAT." >&4
        ;;
    esac
    ;;
*)  val="$undef"

    # We do not have the full sem*(2) library, so assume we can not
    # use either.

    set d_semctl_semun
    eval $setvar

    set d_semctl_semid_ds
    eval $setvar
    ;;
esac
$rm_try tryh.h

: see if sendmsg exists
set sendmsg d_sendmsg
eval $inlibc

: see if setegid exists
set setegid d_setegid
eval $inlibc

: see if setenv exists
set setenv d_setenv
eval $inlibc

: see if seteuid exists
set seteuid d_seteuid
eval $inlibc

: see if setgrent exists
set setgrent d_setgrent
eval $inlibc

: see if setgrent_r exists
set setgrent_r d_setgrent_r
eval $inlibc
case "$d_setgrent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_grp grp.h"
	case "$d_setgrent_r_proto:$usethreads" in
	":define")	d_setgrent_r_proto=define
		set d_setgrent_r_proto setgrent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_setgrent_r_proto" in
	define)
	case "$setgrent_r_proto" in
	''|0) try='int setgrent_r(FILE**);'
	./protochk "$extern_C $try" $hdrs && setgrent_r_proto=I_H ;;
	esac
	case "$setgrent_r_proto" in
	''|0) try='void setgrent_r(FILE**);'
	./protochk "$extern_C $try" $hdrs && setgrent_r_proto=V_H ;;
	esac
	case "$setgrent_r_proto" in
	''|0)	d_setgrent_r=undef
		setgrent_r_proto=0
		echo "Disabling setgrent_r, cannot determine prototype." >&4 ;;
	* )	case "$setgrent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) setgrent_r_proto="REENTRANT_PROTO_$setgrent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "setgrent_r has no prototype, not using it." >&4 ;;
		esac
		d_setgrent_r=undef
		setgrent_r_proto=0
		;;
	esac
	;;
*)	setgrent_r_proto=0
	;;
esac

: see if sethostent exists
set sethostent d_sethent
eval $inlibc

: see if sethostent_r exists
set sethostent_r d_sethostent_r
eval $inlibc
case "$d_sethostent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_sethostent_r_proto:$usethreads" in
	":define")	d_sethostent_r_proto=define
		set d_sethostent_r_proto sethostent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_sethostent_r_proto" in
	define)
	case "$sethostent_r_proto" in
	''|0) try='int sethostent_r(int, struct hostent_data*);'
	./protochk "$extern_C $try" $hdrs && sethostent_r_proto=I_ID ;;
	esac
	case "$sethostent_r_proto" in
	''|0) try='void sethostent_r(int, struct hostent_data*);'
	./protochk "$extern_C $try" $hdrs && sethostent_r_proto=V_ID ;;
	esac
	case "$sethostent_r_proto" in
	''|0)	d_sethostent_r=undef
		sethostent_r_proto=0
		echo "Disabling sethostent_r, cannot determine prototype." >&4 ;;
	* )	case "$sethostent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) sethostent_r_proto="REENTRANT_PROTO_$sethostent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "sethostent_r has no prototype, not using it." >&4 ;;
		esac
		d_sethostent_r=undef
		sethostent_r_proto=0
		;;
	esac
	;;
*)	sethostent_r_proto=0
	;;
esac

: see if setitimer exists
set setitimer d_setitimer
eval $inlibc

: see if setlinebuf exists
set setlinebuf d_setlinebuf
eval $inlibc

: see if setlocale_r exists
set setlocale_r d_setlocale_r
eval $inlibc
case "$d_setlocale_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_locale locale.h"
	case "$d_setlocale_r_proto:$usethreads" in
	":define")	d_setlocale_r_proto=define
		set d_setlocale_r_proto setlocale_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_setlocale_r_proto" in
	define)
	case "$setlocale_r_proto" in
	''|0) try='int setlocale_r(int, const char*, char*, int);'
	./protochk "$extern_C $try" $hdrs && setlocale_r_proto=I_ICBI ;;
	esac
	case "$setlocale_r_proto" in
	''|0)	d_setlocale_r=undef
		setlocale_r_proto=0
		echo "Disabling setlocale_r, cannot determine prototype." >&4 ;;
	* )	case "$setlocale_r_proto" in
		REENTRANT_PROTO*) ;;
		*) setlocale_r_proto="REENTRANT_PROTO_$setlocale_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "setlocale_r has no prototype, not using it." >&4 ;;
		esac
		d_setlocale_r=undef
		setlocale_r_proto=0
		;;
	esac
	;;
*)	setlocale_r_proto=0
	;;
esac

: see if setnetent exists
set setnetent d_setnent
eval $inlibc

: see if setnetent_r exists
set setnetent_r d_setnetent_r
eval $inlibc
case "$d_setnetent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_setnetent_r_proto:$usethreads" in
	":define")	d_setnetent_r_proto=define
		set d_setnetent_r_proto setnetent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_setnetent_r_proto" in
	define)
	case "$setnetent_r_proto" in
	''|0) try='int setnetent_r(int, struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && setnetent_r_proto=I_ID ;;
	esac
	case "$setnetent_r_proto" in
	''|0) try='void setnetent_r(int, struct netent_data*);'
	./protochk "$extern_C $try" $hdrs && setnetent_r_proto=V_ID ;;
	esac
	case "$setnetent_r_proto" in
	''|0)	d_setnetent_r=undef
		setnetent_r_proto=0
		echo "Disabling setnetent_r, cannot determine prototype." >&4 ;;
	* )	case "$setnetent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) setnetent_r_proto="REENTRANT_PROTO_$setnetent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "setnetent_r has no prototype, not using it." >&4 ;;
		esac
		d_setnetent_r=undef
		setnetent_r_proto=0
		;;
	esac
	;;
*)	setnetent_r_proto=0
	;;
esac

: see if setprotoent exists
set setprotoent d_setpent
eval $inlibc

: see if setpgid exists
set setpgid d_setpgid
eval $inlibc

: see if setpgrp2 exists
set setpgrp2 d_setpgrp2
eval $inlibc

: see if setpriority exists
set setpriority d_setprior
eval $inlibc

: see if setproctitle exists
set setproctitle d_setproctitle
eval $inlibc

: see if setprotoent_r exists
set setprotoent_r d_setprotoent_r
eval $inlibc
case "$d_setprotoent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_setprotoent_r_proto:$usethreads" in
	":define")	d_setprotoent_r_proto=define
		set d_setprotoent_r_proto setprotoent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_setprotoent_r_proto" in
	define)
	case "$setprotoent_r_proto" in
	''|0) try='int setprotoent_r(int, struct protoent_data*);'
	./protochk "$extern_C $try" $hdrs && setprotoent_r_proto=I_ID ;;
	esac
	case "$setprotoent_r_proto" in
	''|0) try='void setprotoent_r(int, struct protoent_data*);'
	./protochk "$extern_C $try" $hdrs && setprotoent_r_proto=V_ID ;;
	esac
	case "$setprotoent_r_proto" in
	''|0)	d_setprotoent_r=undef
		setprotoent_r_proto=0
		echo "Disabling setprotoent_r, cannot determine prototype." >&4 ;;
	* )	case "$setprotoent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) setprotoent_r_proto="REENTRANT_PROTO_$setprotoent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "setprotoent_r has no prototype, not using it." >&4 ;;
		esac
		d_setprotoent_r=undef
		setprotoent_r_proto=0
		;;
	esac
	;;
*)	setprotoent_r_proto=0
	;;
esac

: see if setpwent exists
set setpwent d_setpwent
eval $inlibc

: see if setpwent_r exists
set setpwent_r d_setpwent_r
eval $inlibc
case "$d_setpwent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_pwd pwd.h"
	case "$d_setpwent_r_proto:$usethreads" in
	":define")	d_setpwent_r_proto=define
		set d_setpwent_r_proto setpwent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_setpwent_r_proto" in
	define)
	case "$setpwent_r_proto" in
	''|0) try='int setpwent_r(FILE**);'
	./protochk "$extern_C $try" $hdrs && setpwent_r_proto=I_H ;;
	esac
	case "$setpwent_r_proto" in
	''|0) try='void setpwent_r(FILE**);'
	./protochk "$extern_C $try" $hdrs && setpwent_r_proto=V_H ;;
	esac
	case "$setpwent_r_proto" in
	''|0)	d_setpwent_r=undef
		setpwent_r_proto=0
		echo "Disabling setpwent_r, cannot determine prototype." >&4 ;;
	* )	case "$setpwent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) setpwent_r_proto="REENTRANT_PROTO_$setpwent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "setpwent_r has no prototype, not using it." >&4 ;;
		esac
		d_setpwent_r=undef
		setpwent_r_proto=0
		;;
	esac
	;;
*)	setpwent_r_proto=0
	;;
esac

: see if setregid exists
set setregid d_setregid
eval $inlibc
set setresgid d_setresgid
eval $inlibc

: see if setreuid exists
set setreuid d_setreuid
eval $inlibc
set setresuid d_setresuid
eval $inlibc

: see if setrgid exists
set setrgid d_setrgid
eval $inlibc

: see if setruid exists
set setruid d_setruid
eval $inlibc

: see if setservent exists
set setservent d_setsent
eval $inlibc

: see if setservent_r exists
set setservent_r d_setservent_r
eval $inlibc
case "$d_setservent_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_netdb netdb.h"
	case "$d_setservent_r_proto:$usethreads" in
	":define")	d_setservent_r_proto=define
		set d_setservent_r_proto setservent_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_setservent_r_proto" in
	define)
	case "$setservent_r_proto" in
	''|0) try='int setservent_r(int, struct servent_data*);'
	./protochk "$extern_C $try" $hdrs && setservent_r_proto=I_ID ;;
	esac
	case "$setservent_r_proto" in
	''|0) try='void setservent_r(int, struct servent_data*);'
	./protochk "$extern_C $try" $hdrs && setservent_r_proto=V_ID ;;
	esac
	case "$setservent_r_proto" in
	''|0)	d_setservent_r=undef
		setservent_r_proto=0
		echo "Disabling setservent_r, cannot determine prototype." >&4 ;;
	* )	case "$setservent_r_proto" in
		REENTRANT_PROTO*) ;;
		*) setservent_r_proto="REENTRANT_PROTO_$setservent_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "setservent_r has no prototype, not using it." >&4 ;;
		esac
		d_setservent_r=undef
		setservent_r_proto=0
		;;
	esac
	;;
*)	setservent_r_proto=0
	;;
esac

: see if setsid exists
set setsid d_setsid
eval $inlibc

: see if setvbuf exists
set setvbuf d_setvbuf
eval $inlibc

: see if shmctl exists
set shmctl d_shmctl
eval $inlibc

: see if shmget exists
set shmget d_shmget
eval $inlibc

: see if shmat exists
set shmat d_shmat
eval $inlibc
: see what shmat returns
case "$d_shmat" in
"$define")
	$cat >shmat.c <<'END'
#include <sys/shm.h>
void *shmat();
END
	if $cc $ccflags -c shmat.c >/dev/null 2>&1; then
		shmattype='void *'
	else
		shmattype='char *'
	fi
	echo "and it returns ($shmattype)." >&4
	: see if a prototype for shmat is available
	xxx=`./findhdr sys/shm.h`
	$cppstdin $cppflags $cppminus < $xxx > shmat.c 2>/dev/null
	if $contains 'shmat.*(' shmat.c >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	$rm -f shmat.[co]
	;;
*)
	val="$undef"
	;;
esac
set d_shmatprototype
eval $setvar

: see if shmdt exists
set shmdt d_shmdt
eval $inlibc

: see how much of the 'shm*(2)' library is present.
h_shm=true
echo " "
case "$d_shmctl$d_shmget$d_shmat$d_shmdt" in
*"$undef"*) h_shm=false;;
esac
case "$osname" in
freebsd)
    case "`ipcs 2>&1`" in
    "SVID shared memory"*"not configured"*)
	echo "Your $osname does not have the shm*(2) configured." >&4
        h_shm=false
	val="$undef"
	set shmctl d_shmctl
	eval $setvar
	set shmget d_shmget
	eval $setvar
	set shmat d_shmat
	eval $setvar
	set shmdt d_shmdt
	eval $setvar
	;;
    esac
    ;;
esac
: we could also check for sys/ipc.h ...
if $h_shm && $test `./findhdr sys/shm.h`; then
	echo "You have the full shm*(2) library." >&4
	val="$define"
else
	echo "You don't have the full shm*(2) library." >&4
	val="$undef"
fi
set d_shm
eval $setvar

: see if we have sigaction
echo " "
if set sigaction val -f d_sigaction; eval $csym; $val; then
	echo 'sigaction() found.' >&4
	$cat > try.c <<EOP
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main()
{
    struct sigaction act, oact;
    act.sa_flags = 0;
    oact.sa_handler = 0;
    /* so that act and oact are used */
    exit(act.sa_flags == 0 &&  oact.sa_handler == 0);
}
EOP
	set try
	if eval $compile_ok; then
		val="$define"
	else
		echo "But you don't seem to have a usable struct sigaction." >&4
		val="$undef"
	fi
else
	echo 'sigaction NOT found.' >&4
	val="$undef"
fi
set d_sigaction; eval $setvar
$rm_try

: see what type pids are declared as in the kernel
rp="What is the type of process ids on this system?"
set pid_t pidtype int stdio.h sys/types.h
eval $typedef_ask

: see what type uids are declared as in the kernel
echo " "
echo "Looking for the type for user ids returned by getuid()."
set uid_t uidtype xxx stdio.h sys/types.h
eval $typedef
case "$uidtype" in
xxx)
	xxx=`./findhdr sys/user.h`
	set `grep '_ruid;' "$xxx" 2>/dev/null` unsigned short
	case $1 in
	unsigned) dflt="$1 $2" ;;
	*) dflt="$1" ;;
	esac
	;;
*) dflt="$uidtype";;
esac
case "$uidtype" in
uid_t)	echo "uid_t found." ;;
*)	rp="What is the type for user ids returned by getuid()?"
	. ./myread
	uidtype="$ans"
	;;
esac

: Define hasfield_t macro for Configure internal use
hasfield_t='varname=$1; struct=$2; type=$3; field=$4; shift; shift; shift; shift;
while $test $# -ge 2; do
    case "$1" in
	$define) echo "#include <$2>";;
    esac ;
    shift 2;
done > try.c;
echo "int main () { $struct foo; $type bar = foo.$field; }" >> try.c;
set try;
if eval $compile; then
	val="$define";
else
	val="$undef";
fi;
set $varname;
eval $setvar;
$rm_try'

: see what siginfo fields we have
case "$d_sigaction" in
"$define")
	echo "Checking if your siginfo_t has si_errno field...">&4
	set d_siginfo_si_errno siginfo_t int si_errno $d_sigaction signal.h
	eval $hasfield_t;

	echo "Checking if your siginfo_t has si_pid field...">&4
	set d_siginfo_si_pid siginfo_t $pidtype si_pid $d_sigaction signal.h
	eval $hasfield_t;

	echo "Checking if your siginfo_t has si_uid field...">&4
	set d_siginfo_si_uid siginfo_t $uidtype si_uid $d_sigaction signal.h
	eval $hasfield_t;

	echo "Checking if your siginfo_t has si_addr field...">&4
	set d_siginfo_si_addr siginfo_t "void *" si_addr $d_sigaction signal.h
	eval $hasfield_t;

	echo "Checking if your siginfo_t has si_status field...">&4
	set d_siginfo_si_status siginfo_t int si_status $d_sigaction signal.h
	eval $hasfield_t;

	echo "Checking if your siginfo_t has si_band field...">&4
	set d_siginfo_si_band siginfo_t long si_band $d_sigaction signal.h
	eval $hasfield_t;

	echo "Checking if your siginfo_t has si_value field...">&4
	set d_siginfo_si_value siginfo_t "union sigval" si_value $d_sigaction signal.h
	eval $hasfield_t;

	echo "Checking if your siginfo_t has si_fd field...">&4
	set d_siginfo_si_fd siginfo_t int si_fd $d_sigaction signal.h
	eval $hasfield_t;

	;;
*)
	d_siginfo_si_errno="$undef"
	d_siginfo_si_pid="$undef"
	d_siginfo_si_uid="$undef"
	d_siginfo_si_addr="$undef"
	d_siginfo_si_status="$undef"
	d_siginfo_si_band="$undef"
	d_siginfo_si_value="$undef"
	d_siginfo_si_fd="$undef"
	;;
esac

: see if this is a sunmath.h system
set sunmath.h i_sunmath
eval $inhdr

: see if signbit exists
$echo $n "Checking to see if you have signbit() available to work on $nvtype... $c" >&4
$cat >try.c <<EOCP
#$i_sunmath I_SUNMATH
#include <math.h>
#ifdef I_SUNMATH  /* Solaris special math library */
#  include <sunmath.h>
#endif
#define NV $nvtype
int main(int argc, char **argv)
{
    NV x = 0.0;
    NV y = -1.0;
    if ((signbit(x) == 0) && (signbit(y) != 0))
	return 0;
    else
	return 1;
}
EOCP
val="$undef"
set try
if eval $compile; then
    if $run ./try; then
        $echo "Yes." >&4
	val="$define"
    else
        $echo "Signbit seems to be available, but doesn't work as I expected."
        $echo "I won't use it." >&4
	val="$undef"
    fi
else
    $echo "Nope." >&4
    dflt="$undef"
fi
set d_signbit
eval $setvar
$rm_try

: see if sigprocmask exists
set sigprocmask d_sigprocmask
eval $inlibc

: see if sigsetjmp exists
echo " "
case "$d_sigsetjmp" in
'')
	$cat >try.c <<EOP
#include <setjmp.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
sigjmp_buf env;
int set = 1;
int main()
{
	if (sigsetjmp(env,1))
		exit(set);
	set = 0;
	siglongjmp(env, 1);
	exit(1);
}
EOP
	set try
	if eval $compile; then
		if $run ./try >/dev/null 2>&1; then
			echo "POSIX sigsetjmp found." >&4
			val="$define"
		else
			$cat >&4 <<EOM
Uh-Oh! You have POSIX sigsetjmp and siglongjmp, but they do not work properly!!
I'll ignore them.
EOM
			val="$undef"
		fi
	else
		echo "sigsetjmp not found." >&4
		val="$undef"
	fi
	;;
*) val="$d_sigsetjmp"
	case "$d_sigsetjmp" in
	$define) echo "POSIX sigsetjmp found." >&4;;
	$undef) echo "sigsetjmp not found." >&4;;
	esac
	;;
esac
set d_sigsetjmp
eval $setvar
$rm_try

: see if snprintf exists
set snprintf d_snprintf
eval $inlibc

: see if vsnprintf exists
set vsnprintf d_vsnprintf
eval $inlibc

case "$d_snprintf-$d_vsnprintf" in
"$define-$define")
    $cat <<EOM
Checking whether your snprintf() and vsnprintf() work okay...
EOM
    $cat >try.c <<'EOCP'
/* v?snprintf testing logic courtesy of Russ Allbery.
 * According to C99:
 * - if the buffer is too short it still must be \0-terminated
 * - if the buffer is too short the potentially required length
 *   must be returned and not -1
 * - if the buffer is NULL the potentially required length
 *   must be returned and not -1 or core dump
 */
#include <stdio.h>
#include <stdarg.h>

char buf[2];

int test (char *format, ...)
{
    va_list args;
    int count;

    va_start (args, format);
    count = vsnprintf (buf, sizeof buf, format, args);
    va_end (args);
    return count;
}

int main ()
{
    return ((test ("%s", "abcd") == 4 && buf[0] == 'a' && buf[1] == '\0'
             && snprintf (NULL, 0, "%s", "abcd") == 4) ? 0 : 1);
}
EOCP
    set try
    if eval $compile; then
	`$run ./try`
	case "$?" in
	0) echo "Your snprintf() and vsnprintf() seem to be working okay." ;;
	*) cat <<EOM >&4
Your snprintf() and snprintf() don't seem to be working okay.
EOM
	   d_snprintf="$undef"
	   d_vsnprintf="$undef"
	   ;;
	esac
    else
	echo "(I can't seem to compile the test program--assuming they don't)"
	d_snprintf="$undef"
	d_vsnprintf="$undef"
    fi
    $rm_try
    ;;
esac

: see if sockatmark exists
set sockatmark d_sockatmark
eval $inlibc

: see if prototype for sockatmark is available
echo " "
set d_sockatmarkproto sockatmark $d_socket sys/socket.h
eval $hasproto

: see if socks5_init exists
set socks5_init d_socks5_init
eval $inlibc

: see if srand48_r exists
set srand48_r d_srand48_r
eval $inlibc
case "$d_srand48_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_stdlib stdlib.h"
	case "$d_srand48_r_proto:$usethreads" in
	":define")	d_srand48_r_proto=define
		set d_srand48_r_proto srand48_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_srand48_r_proto" in
	define)
	case "$srand48_r_proto" in
	''|0) try='int srand48_r(long, struct drand48_data*);'
	./protochk "$extern_C $try" $hdrs && srand48_r_proto=I_LS ;;
	esac
	case "$srand48_r_proto" in
	''|0)	d_srand48_r=undef
		srand48_r_proto=0
		echo "Disabling srand48_r, cannot determine prototype." >&4 ;;
	* )	case "$srand48_r_proto" in
		REENTRANT_PROTO*) ;;
		*) srand48_r_proto="REENTRANT_PROTO_$srand48_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "srand48_r has no prototype, not using it." >&4 ;;
		esac
		d_srand48_r=undef
		srand48_r_proto=0
		;;
	esac
	;;
*)	srand48_r_proto=0
	;;
esac

: see if srandom_r exists
set srandom_r d_srandom_r
eval $inlibc
case "$d_srandom_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_stdlib stdlib.h"
	case "$d_srandom_r_proto:$usethreads" in
	":define")	d_srandom_r_proto=define
		set d_srandom_r_proto srandom_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_srandom_r_proto" in
	define)
	case "$srandom_r_proto" in
	''|0) try='int srandom_r(unsigned int, struct random_data*);'
	./protochk "$extern_C $try" $hdrs && srandom_r_proto=I_TS ;;
	esac
	case "$srandom_r_proto" in
	''|0)	d_srandom_r=undef
		srandom_r_proto=0
		echo "Disabling srandom_r, cannot determine prototype." >&4 ;;
	* )	case "$srandom_r_proto" in
		REENTRANT_PROTO*) ;;
		*) srandom_r_proto="REENTRANT_PROTO_$srandom_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "srandom_r has no prototype, not using it." >&4 ;;
		esac
		d_srandom_r=undef
		srandom_r_proto=0
		;;
	esac
	;;
*)	srandom_r_proto=0
	;;
esac

: see if prototype for setresgid is available
echo " "
set d_sresgproto setresgid $i_unistd unistd.h
eval $hasproto

: see if prototype for setresuid is available
echo " "
set d_sresuproto setresuid $i_unistd unistd.h
eval $hasproto

: see if stat exists
set stat d_stat
eval $inlibc

: see if sys/stat.h is available
set sys/stat.h i_sysstat
eval $inhdr

: see if stat knows about block sizes
echo " "
echo "Checking to see if your struct stat has st_blocks field..." >&4
set d_statblks stat st_blocks $i_sysstat sys/stat.h
eval $hasfield

: see if this is a sys/vfs.h system
set sys/vfs.h i_sysvfs
eval $inhdr

: see if this is a sys/statfs.h system
set sys/statfs.h i_sysstatfs
eval $inhdr

: Check for statfs_s
echo " "
echo "Checking to see if your system supports struct statfs..." >&4
set d_statfs_s statfs $i_systypes sys/types.h $i_sysparam sys/param.h $i_sysmount sys/mount.h $i_sysvfs sys/vfs.h $i_sysstatfs sys/statfs.h
eval $hasstruct
case "$d_statfs_s" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac

: see if struct statfs knows about f_flags
case "$d_statfs_s" in
define)
	echo " "
	echo "Checking to see if your struct statfs has f_flags field..." >&4
	set d_statfs_f_flags statfs f_flags $i_systypes sys/types.h $i_sysparam sys/param.h $i_sysmount sys/mount.h $i_sysvfs sys/vfs.h $i_sysstatfs sys/statfs.h
	eval $hasfield
	;;
*)	val="$undef"
	set d_statfs_f_flags
	eval $setvar
	;;
esac
case "$d_statfs_f_flags" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac

: see what flavor, if any, of static inline is supported
echo " "
echo "Checking to see if your system supports static inline..."
$cat > try.c <<'EOCP'
#include <stdlib.h>
extern int f_via_a(int x);
extern int f_via_b(int x);
int main(int argc, char **argv)
{
    int y;

    y = f_via_a(0);
#ifdef USE_B
    y = f_via_b(0);
#endif
    if (y == 42) {
        return EXIT_SUCCESS;
    }
    else {
        return EXIT_FAILURE;
    }
}
EOCP
$cat > a.c <<'EOCP'
static INLINE int f(int x) {
    int y;
    y = x + 42;
    return y;
}

int f_via_a(int x)
{
    return f(x);
}
EOCP
$cat > b.c <<'EOCP'
extern int f(int x);

int f_via_b(int x)
{
    return f(x);
}
EOCP

# Respect a hint (or previous) value for perl_static_inline, if there is one.
case "$perl_static_inline" in
'')	# Check the various possibilities, and break out on success.
	# For gcc, prefer __inline__, which will still permit
	# cflags.SH to add in -ansi.
	case "$gccversion" in
		'') xxx="inline __inline__ __inline _inline";;
		*)  xxx="__inline__ inline __inline _inline";;
	esac
	for inline in $xxx; do
		set try -DINLINE=$inline a.c
		if eval $compile && $run ./try; then
			# Now make sure there is no external linkage of static
			# functions
			set try -DINLINE=$inline -DUSE_B a.c b.c
			if eval $compile && $run ./try; then
				$echo "Your compiler supports static $inline, " >&4
				$echo "but it also creates an external definition," >&4
				$echo "so I won't use it." >&4
				val=$undef
			else
				$echo "Your compiler supports static $inline." >&4
				val=$define
				perl_static_inline="static $inline";
				break;
			fi
		else
			$echo "Your compiler does NOT support static $inline." >&4
			val="$undef"
		fi
	done
	;;
*inline*) # Some variant of inline exists.
	echo "Keeping your $hint value of $perl_static_inline."
	val=$define
	;;
static)  # No inline capabilities
	echo "Keeping your $hint value of $perl_static_inline."
	val=$undef
	;;
*)  # Unrecognized previous value -- blindly trust the supplied
	# value and hope it makes sense.  Use old value for
	# d_static_inline, if there is one.
	echo "Keeping your $hint value of $perl_static_inline."
	case "$d_static_inline" in
		'') val=$define ;;
		*)  val=$d_static_inline ;;
	esac
	;;
esac
# Fallback to plain 'static' if nothing worked.
case "$perl_static_inline" in
'')
	perl_static_inline="static"
	val=$undef
	;;
esac
set d_static_inline
eval $setvar
$rm -f a.[co] b.[co]
$rm_try

: Check stream access
$cat >&4 <<EOM
Checking how to access stdio streams by file descriptor number...
EOM
case "$stdio_stream_array" in
'')	$cat >try.c <<EOCP
#include <stdio.h>
int main() {
  if (&STDIO_STREAM_ARRAY[fileno(stdin)] == stdin)
    printf("yes\n");
}
EOCP
	for s in _iob __iob __sF
	do
	        set try -DSTDIO_STREAM_ARRAY=$s
		if eval $compile; then
			case "`$run ./try`" in
			yes)	stdio_stream_array=$s; break ;;
			esac
		fi
	done
	$rm_try
esac
case "$stdio_stream_array" in
'')	$cat >&4 <<EOM
I can't figure out how to access stdio streams by file descriptor number.
EOM
	d_stdio_stream_array="$undef"
	;;
*)	$cat >&4 <<EOM
You can access stdio streams by file descriptor number by the $stdio_stream_array array.
EOM
	d_stdio_stream_array="$define"
	;;
esac

: see if strcoll exists
set strcoll d_strcoll
eval $inlibc

: see if strerror_l exists
set strerror_l d_strerror_l
eval $inlibc

: see if strerror_r exists
set strerror_r d_strerror_r
eval $inlibc
case "$d_strerror_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h define string.h"
	case "$d_strerror_r_proto:$usethreads" in
	":define")	d_strerror_r_proto=define
		set d_strerror_r_proto strerror_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_strerror_r_proto" in
	define)
	case "$strerror_r_proto" in
	''|0) try='int strerror_r(int, char*, size_t);'
	./protochk "$extern_C $try" $hdrs && strerror_r_proto=I_IBW ;;
	esac
	case "$strerror_r_proto" in
	''|0) try='int strerror_r(int, char*, int);'
	./protochk "$extern_C $try" $hdrs && strerror_r_proto=I_IBI ;;
	esac
	case "$strerror_r_proto" in
	''|0) try='char* strerror_r(int, char*, size_t);'
	./protochk "$extern_C $try" $hdrs && strerror_r_proto=B_IBW ;;
	esac
	case "$strerror_r_proto" in
	''|0)	d_strerror_r=undef
		strerror_r_proto=0
		echo "Disabling strerror_r, cannot determine prototype." >&4 ;;
	* )	case "$strerror_r_proto" in
		REENTRANT_PROTO*) ;;
		*) strerror_r_proto="REENTRANT_PROTO_$strerror_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "strerror_r has no prototype, not using it." >&4 ;;
		esac
		d_strerror_r=undef
		strerror_r_proto=0
		;;
	esac
	;;
*)	strerror_r_proto=0
	;;
esac

: see if strftime exists
set strftime d_strftime
eval $inlibc

: see if strlcat exists
: We need both a prototype in string.h and the symbol in libc.
echo " "
d_strlcat_proto=''
xx1="#$d_gnulibc HAS_GNULIBC"
xx2='#if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)'
xx3='#   define _GNU_SOURCE'
xx4='#endif'
set d_strlcat_proto strlcat literal "$xx1" literal "$xx2" literal "$xx3" literal "$xx4" define string.h
eval $hasproto
case "$d_strlcat_proto" in
    define) # see if strlcat exists
	set strlcat d_strlcat
	eval $inlibc
	;;
    *)  val=$undef
	set d_strlcat
	eval $setvar
	;;
esac

: see if strlcpy exists
: We need both a prototype in string.h and the symbol in libc.
echo " "
d_strlcpy_proto=''
xx1="#$d_gnulibc HAS_GNULIBC"
xx2='#if defined(HAS_GNULIBC) && !defined(_GNU_SOURCE)'
xx3='#   define _GNU_SOURCE'
xx4='#endif'
set d_strlcpy_proto strlcpy literal "$xx1" literal "$xx2" literal "$xx3" literal "$xx4" define string.h
eval $hasproto
case "$d_strlcpy_proto" in
    define) # see if strlcpy exists
	set strlcpy d_strlcpy
	eval $inlibc
	;;
    *)  val=$undef
	set d_strlcpy
	eval $setvar
	;;
esac

: see if strnlen exists
set strnlen d_strnlen
eval $inlibc

: see if strtod exists
set strtod d_strtod
eval $inlibc

: see if strtod_l exists
set strtod_l d_strtod_l
eval $inlibc

: see if strtol exists
set strtol d_strtol
eval $inlibc

: see if strtold exists
set strtold d_strtold
eval $inlibc

: see if strtold_l exists
set strtold_l d_strtold_l
eval $inlibc

: see if strtoll exists
set strtoll d_strtoll
eval $inlibc

case "$d_longlong-$d_strtoll" in
"$define-$define")
	$cat <<EOM
Checking whether your strtoll() works okay...
EOM
	$cat >try.c <<'EOCP'
#include <errno.h>
#ifdef __hpux
#define strtoll __strtoll
#endif
#ifdef __EMX__
#define strtoll _strtoll
#endif
#include <stdio.h>
#include <stdlib.h>
static int bad = 0;
void check(const char *s, long long ell, int een) {
	long long gll;
	errno = 0;
	gll = strtoll(s, 0, 10);
	if (!((gll == ell) && (errno == een)))
		bad++;
}
int main() {
	check(" 1",                                      1LL, 0);
	check(" 0",                                      0LL, 0);
	check("-1",                                     -1LL, 0);
	check("-9223372036854775808", -9223372036854775808LL, 0);
	check("-9223372036854775808", -9223372036854775808LL, 0);
	check(" 9223372036854775807",  9223372036854775807LL, 0);
	check("-9223372036854775808", -9223372036854775808LL, 0);
	check(" 9223372036854775808",  9223372036854775807LL, ERANGE);
	check("-9223372036854775809", -9223372036854775808LL, ERANGE);
	if (!bad)
		printf("ok\n");
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		ok) echo "Your strtoll() seems to be working okay." ;;
		*) cat <<EOM >&4
Your strtoll() doesn't seem to be working okay.
EOM
		   d_strtoll="$undef"
		   ;;
		esac
	else
		echo "(I can't seem to compile the test program--assuming it doesn't)"
		d_strtoll="$undef"
	fi
	;;
esac

: see if strtoq exists
set strtoq d_strtoq
eval $inlibc

: see if strtoul exists
set strtoul d_strtoul
eval $inlibc

case "$d_strtoul" in
"$define")
	$cat <<EOM
Checking whether your strtoul() works okay...
EOM
	$cat >try.c <<'EOCP'
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
static int bad = 0;
void check(const char *s, unsigned long eul, int een) {
	unsigned long gul;
	errno = 0;
	gul = strtoul(s, 0, 10);
	if (!((gul == eul) && (errno == een)))
		bad++;
}
int main() {
	check(" 1", 1L, 0);
	check(" 0", 0L, 0);
EOCP
	case "$longsize" in
	8)
	    $cat >>try.c <<'EOCP'
	check("18446744073709551615", 18446744073709551615UL, 0);
	check("18446744073709551616", 18446744073709551615UL, ERANGE);
#if 0 /* strtoul() for /^-/ strings is undefined. */
	check("-1", 18446744073709551615UL, 0);
	check("-18446744073709551614", 2, 0);
	check("-18446744073709551615", 1, 0);
	check("-18446744073709551616", 18446744073709551615UL, ERANGE);
	check("-18446744073709551617", 18446744073709551615UL, ERANGE);
#endif
EOCP
		;;
	4)
		    $cat >>try.c <<'EOCP'
	check("4294967295", 4294967295UL, 0);
	check("4294967296", 4294967295UL, ERANGE);
#if 0 /* strtoul() for /^-/ strings is undefined. */
	check("-1", 4294967295UL, 0);
	check("-4294967294", 2, 0);
	check("-4294967295", 1, 0);
	check("-4294967296", 4294967295UL, ERANGE);
	check("-4294967297", 4294967295UL, ERANGE);
#endif
EOCP
		;;
	*)
: Should we write these tests to be more portable by sprintf-ing
: ~0 and then manipulating that char string as input for strtol?
		;;
	esac
	$cat >>try.c <<'EOCP'
	if (!bad)
		printf("ok\n");
	return 0;
}
EOCP
	set try
	if eval $compile; then
		case "`$run ./try`" in
		ok) echo "Your strtoul() seems to be working okay." ;;
		*) cat <<EOM >&4
Your strtoul() doesn't seem to be working okay.
EOM
		   d_strtoul="$undef"
		   ;;
		esac
	else
		echo "(I can't seem to compile the test program--assuming it doesn't)"
		d_strtoul="$undef"
	fi
	;;
esac

: see if strtoull exists
set strtoull d_strtoull
eval $inlibc

case "$d_longlong-$d_strtoull" in
"$define-$define")
	$cat <<EOM
Checking whether your strtoull() works okay...
EOM
	$cat >try.c <<'EOCP'
#include <stdlib.h>
#include <errno.h>
#ifdef __hpux
#define strtoull __strtoull
#endif
#include <stdio.h>
static int bad = 0;
void check(const char *s, long long eull, int een) {
	long long gull;
	errno = 0;
	gull = strtoull(s, 0, 10);
	if (!((gull == eull) && (errno == een)))
		bad++;
}
int main() {
	check(" 1",                                        1LL, 0);
	check(" 0",                                        0LL, 0);
	check("18446744073709551615",  18446744073709551615ULL, 0);
	check("18446744073709551616",  18446744073709551615ULL, ERANGE);
#if 0 /* strtoull() for /^-/ strings is undefined. */
	check("-1",                    18446744073709551615ULL, 0);
	check("-18446744073709551614",                     2LL, 0);
	check("-18446744073709551615",                     1LL, 0);
	check("-18446744073709551616", 18446744073709551615ULL, ERANGE);
	check("-18446744073709551617", 18446744073709551615ULL, ERANGE);
#endif
	if (!bad)
		printf("ok\n");
}
EOCP
	set try
	if eval $compile; then
		case "`$run ./try`" in
		ok) echo "Your strtoull() seems to be working okay." ;;
		*) cat <<EOM >&4
Your strtoull() doesn't seem to be working okay.
EOM
		   d_strtoull="$undef"
		   ;;
		esac
	else
		echo "(I can't seem to compile the test program--assuming it doesn't)"
		d_strtoull="$undef"
	fi
	;;
esac

: see if strtouq exists
set strtouq d_strtouq
eval $inlibc

case "$d_strtouq" in
"$define")
	$cat <<EOM
Checking whether your strtouq() works okay...
EOM
	$cat >try.c <<'EOCP'
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
static int bad = 0;
void check(const char *s, unsigned long long eull, int een) {
	unsigned long long gull;
	errno = 0;
	gull = strtouq(s, 0, 10);
	if (!((gull == eull) && (errno == een)))
		bad++;
}
int main() {
	check(" 1",                                        1LL, 0);
	check(" 0",                                        0LL, 0);
	check("18446744073709551615",  18446744073709551615ULL, 0);
	check("18446744073709551616",  18446744073709551615ULL, ERANGE);
#if 0 /* strtouq() for /^-/ strings is undefined. */
	check("-1",                    18446744073709551615ULL, 0);
	check("-18446744073709551614",                     2LL, 0);
	check("-18446744073709551615",                     1LL, 0);
	check("-18446744073709551616", 18446744073709551615ULL, ERANGE);
	check("-18446744073709551617", 18446744073709551615ULL, ERANGE);
#endif
	if (!bad)
		printf("ok\n");
	return 0;
}
EOCP
	set try
	if eval $compile; then
		case "`$run ./try`" in
		ok) echo "Your strtouq() seems to be working okay." ;;
		*) cat <<EOM >&4
Your strtouq() doesn't seem to be working okay.
EOM
		   d_strtouq="$undef"
		   ;;
		esac
	else
		echo "(I can't seem to compile the test program--assuming it doesn't)"
		d_strtouq="$undef"
	fi
	;;
esac

: see if strxfrm exists
set strxfrm d_strxfrm
eval $inlibc

: see if strxfrm_l exists
set strxfrm_l d_strxfrm_l
eval $inlibc

: see if symlink exists
set symlink d_symlink
eval $inlibc

: see if syscall exists
set syscall d_syscall
eval $inlibc

: see if this is a sys/syscall.h system
set sys/syscall.h i_syssyscall
eval $inhdr

: see if prototype for syscall is available
echo " "
set d_syscallproto syscall $i_unistd unistd.h $i_syssyscall sys/syscall.h
eval $hasproto

: see if sysconf exists
set sysconf d_sysconf
eval $inlibc

: see if sys_errlist[] exists
echo " "
if test "X$d_syserrlst" = X; then
	if set sys_errlist val -a d_syserrlst; eval $csym; $val; then
		echo "You have sys_errlist[], so we could roll our own strerror."
		d_syserrlst="$define"
	else
		echo "You don't have sys_errlist[], so strerror() is welcome."
		d_syserrlst="$undef"
	fi
fi

: see if system exists
set system d_system
eval $inlibc

: see if tcgetpgrp exists
set tcgetpgrp d_tcgetpgrp
eval $inlibc

: see if tcsetpgrp exists
set tcsetpgrp d_tcsetpgrp
eval $inlibc

: see if prototype for telldir is available
echo " "
set d_telldirproto telldir $i_systypes sys/types.h $i_dirent dirent.h
eval $hasproto

: see if tgamma exists
set tgamma d_tgamma
eval $inlibc

: see what flavor, if any, of thread local storage is supported
echo " "
echo "Checking to see if your system supports C11 thread local storage..."
$cat > try.c <<'EOCP'
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

static int plus_one = 1;
static int minus_one = -1;

PROBE_MACRO int *minion;

int callback (const void *a, const void *b) {
    int val_a = *minion * *(const int *)a;
    int val_b = *minion * *(const int *)b;
    return val_a < val_b ? -1 : val_a > val_b;
}

#define SIZE 8

void *thread_function(void *arg) {
    /* thread local variables should start zeroed in each thread. */
    if (minion != NULL) {
        fprintf(stderr, "__thread variable started with %p, should be NULL\n",
                minion);
        exit(2);
    }
    minion = &minus_one;

    int array[SIZE];
    unsigned int i;
    for (i = 0; i < SIZE; ++i) {
        /* "Hash randomisation" - this array isn't in sorted order: */
        array[i ^ 5] = i * i;
    }

    qsort(array, SIZE, sizeof(int), callback);

    int bad = 0;
    for (i = 0; i < SIZE; ++i) {
        int want = (SIZE - 1 - i) * (SIZE - 1 - i);
        int have = array[i];
        if (want != have) {
            ++bad;
            fprintf(stderr, "array[%u] - want %i, have %i\n", i, want, have);
        }
    }
    if (bad)
        exit(3);

    return NULL;
}

int main(int argc, char **argv) {
    if (minion != NULL) {
        fprintf(stderr, "__thread variable started with %p, should be NULL\n",
                minion);
        exit(4);
    }

    minion = &plus_one;

    pthread_t tid;
    int result = pthread_create(&tid, NULL, thread_function, NULL);
    if (result) {
        fprintf(stderr, "pthread_create failed (%d)\n", result);
        exit(5);
    }

    result = pthread_join(tid, NULL);
    if (result) {
        fprintf(stderr, "pthread_join failed (%d)\n", result);
        exit(6);
    }

    if (minion == NULL) {
        fprintf(stderr, "__thread variable should not be NULL\n");
        exit(7);
    }
    if (!(minion == &plus_one && *minion == 1)) {
        fprintf(stderr, "__thread variable should be %d @ %p, not %d @ %p\n",
                1, &plus_one, *minion, minion);
        exit(8);
    }

    return 0;
}
EOCP

# Respect a hint (or previous) value for perl_thread_local, if there is one.
case "$perl_thread_local" in
'')	# Check the various possibilities, and break out on success.
	for thread_local in _Thread_local __thread; do
		set try -DPROBE_MACRO=$thread_local
		if eval $compile && $run ./try; then
			$echo "Your compiler supports $thread_local." >&4
			val=$define
			perl_thread_local="$thread_local";
			break;
		fi
		$echo "Your compiler does NOT support $thread_local." >&4
		val="$undef"
	done
	;;
*thread*|*Thread*) # Some variant of thread local exists.
	echo "Keeping your $hint value of $perl_thread_local."
	val=$define
	;;
*)  # Unrecognized previous value -- blindly trust the supplied
	# value and hope it makes sense.  Use old value for
	# d_thread_local, if there is one.
	echo "Keeping your $hint value of $perl_thread_local."
	case "$d_thread_local" in
		'') val=$define ;;
		*)  val=$d_thread_local ;;
	esac
	;;
esac
set d_thread_local
eval $setvar
$rm_try

: see if time exists
echo " "
if test "X$d_time" = X -o X"$timetype" = X; then
    if set time val -f d_time; eval $csym; $val; then
		echo 'time() found.' >&4
		val="$define"
		rp="What is the type returned by time() on this system?"
		set time_t timetype long stdio.h sys/types.h
		eval $typedef_ask
    else
		echo 'time() not found, hope that will do.' >&4
		val="$undef"
		timetype='int';
    fi
    set d_time
    eval $setvar
fi

: see if timegm exists
set timegm d_timegm
eval $inlibc

: see if this is a sys/times.h system
set sys/times.h i_systimes
eval $inhdr

: see if times exists
echo " "
if set times val -f d_times; eval $csym; $val; then
	echo 'times() found.' >&4
	d_times="$define"
	inc=''
	case "$i_systimes" in
	"$define") inc='sys/times.h';;
	esac
	rp="What is the type returned by times() on this system?"
	set clock_t clocktype long stdio.h sys/types.h $inc
	eval $typedef_ask
else
	echo 'times() NOT found, hope that will do.' >&4
	d_times="$undef"
	clocktype='int'
fi

: see if tmpnam_r exists
set tmpnam_r d_tmpnam_r
eval $inlibc
case "$d_tmpnam_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h "
	case "$d_tmpnam_r_proto:$usethreads" in
	":define")	d_tmpnam_r_proto=define
		set d_tmpnam_r_proto tmpnam_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_tmpnam_r_proto" in
	define)
	case "$tmpnam_r_proto" in
	''|0) try='char* tmpnam_r(char*);'
	./protochk "$extern_C $try" $hdrs && tmpnam_r_proto=B_B ;;
	esac
	case "$tmpnam_r_proto" in
	''|0)	d_tmpnam_r=undef
		tmpnam_r_proto=0
		echo "Disabling tmpnam_r, cannot determine prototype." >&4 ;;
	* )	case "$tmpnam_r_proto" in
		REENTRANT_PROTO*) ;;
		*) tmpnam_r_proto="REENTRANT_PROTO_$tmpnam_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "tmpnam_r has no prototype, not using it." >&4 ;;
		esac
		d_tmpnam_r=undef
		tmpnam_r_proto=0
		;;
	esac
	;;
*)	tmpnam_r_proto=0
	;;
esac

: see if towlower exists
set towlower d_towlower
eval $inlibc

: see if trunc exists
set trunc d_trunc
eval $inlibc

: see if truncate exists
set truncate d_truncate
eval $inlibc

: see if ttyname_r exists
set ttyname_r d_ttyname_r
eval $inlibc
case "$d_ttyname_r" in
"$define")
	hdrs="$i_systypes sys/types.h define stdio.h $i_unistd unistd.h"
	case "$d_ttyname_r_proto:$usethreads" in
	":define")	d_ttyname_r_proto=define
		set d_ttyname_r_proto ttyname_r $hdrs
		eval $hasproto ;;
	*)	;;
	esac
	case "$d_ttyname_r_proto" in
	define)
	case "$ttyname_r_proto" in
	''|0) try='int ttyname_r(int, char*, size_t);'
	./protochk "$extern_C $try" $hdrs && ttyname_r_proto=I_IBW ;;
	esac
	case "$ttyname_r_proto" in
	''|0) try='int ttyname_r(int, char*, int);'
	./protochk "$extern_C $try" $hdrs && ttyname_r_proto=I_IBI ;;
	esac
	case "$ttyname_r_proto" in
	''|0) try='char* ttyname_r(int, char*, int);'
	./protochk "$extern_C $try" $hdrs && ttyname_r_proto=B_IBI ;;
	esac
	case "$ttyname_r_proto" in
	''|0)	d_ttyname_r=undef
		ttyname_r_proto=0
		echo "Disabling ttyname_r, cannot determine prototype." >&4 ;;
	* )	case "$ttyname_r_proto" in
		REENTRANT_PROTO*) ;;
		*) ttyname_r_proto="REENTRANT_PROTO_$ttyname_r_proto" ;;
		esac
		echo "Prototype: $try" ;;
	esac
	;;
	*)	case "$usethreads" in
		define) echo "ttyname_r has no prototype, not using it." >&4 ;;
		esac
		d_ttyname_r=undef
		ttyname_r_proto=0
		;;
	esac
	;;
*)	ttyname_r_proto=0
	;;
esac

: see if tzname[] exists
echo " "
if set tzname val -a d_tzname; eval $csym; $val; then
	val="$define"
	echo 'tzname[] found.' >&4
else
	val="$undef"
	echo 'tzname[] NOT found.' >&4
fi
set d_tzname
eval $setvar

: Check if is a multiplatform env
case "$osname" in
darwin) multiarch="$define" ;;
esac
case "$multiarch" in
''|[nN]*) multiarch="$undef" ;;
esac

: check for ordering of bytes in a UV
echo " "
case "$multiarch" in
*$define*)
	$cat <<EOM
You seem to be doing a multiarchitecture build,
skipping the byteorder check.

EOM
	byteorder='ffff'
	;;
*)
	case "$byteorder" in
	'')
		$cat <<'EOM'
In the following, larger digits indicate more significance.  A big-endian
machine like a Pyramid or a Motorola 680?0 chip will come out to 4321. A
little-endian machine like a Vax or an Intel 80?86 chip would be 1234. Other
machines may have weird orders like 3412.  A Cray will report 87654321,
an Alpha will report 12345678. If the test program works the default is
probably right.
I'm now running the test program...
EOM
		$cat >try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_inttypes I_INTTYPES
#ifdef I_INTTYPES
#include <inttypes.h>
#endif
#include <sys/types.h>
typedef $uvtype UV;
int main()
{
	int i;
	union {
		UV l;
		char c[$uvsize];
	} u;

	if ($uvsize > 4)
		u.l = (((UV)0x08070605) << 32) | (UV)0x04030201;
	else
		u.l = (UV)0x04030201;
	for (i = 0; i < $uvsize; i++)
		printf("%c", u.c[i]+'0');
	printf("\n");
	exit(0);
}
EOCP
		xxx_prompt=y
		set try
		if eval $compile && $run ./try > /dev/null; then
			dflt=`$run ./try`
			case "$dflt" in
			[1-4][1-4][1-4][1-4]|12345678|87654321)
				echo "(The test program ran ok.)"
				echo "byteorder=$dflt"
				xxx_prompt=n
			;;
			????|????????) echo "(The test program ran ok.)" ;;
			*) echo "(The test program didn't run right for some reason.)" ;;
			esac
		else
			dflt='4321'
			cat <<'EOM'
(I can't seem to compile the test program.  Guessing big-endian...)
EOM
		fi
		case "$xxx_prompt" in
		y)
			rp="What is the order of bytes in $uvtype?"
			. ./myread
			byteorder="$ans"
			;;
		*)	byteorder=$dflt
			;;
		esac
		;;
	esac
	$rm_try
	;;
esac

: Checking 32bit alignedness
$cat <<EOM

Checking to see whether you can access character data unalignedly...
EOM
case "$d_u32align" in
'')   $cat >try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#define U32 $u32type
#define BYTEORDER 0x$byteorder
#define U8 $u8type
#include <signal.h>
#ifdef SIGBUS
$signal_t bletch(int s) { exit(4); }
#endif
int main() {
#if BYTEORDER == 0x1234 || BYTEORDER == 0x4321
    volatile U8 buf[8];
    volatile U32 *up;
    int i;

    if (sizeof(U32) != 4) {
	printf("sizeof(U32) is not 4, but %d\n", sizeof(U32));
	exit(1);
    }

    fflush(stdout);

#ifdef SIGBUS
    signal(SIGBUS, bletch);
#endif

    buf[0] = 0;
    buf[1] = 0;
    buf[2] = 0;
    buf[3] = 1;
    buf[4] = 0;
    buf[5] = 0;
    buf[6] = 0;
    buf[7] = 1;

    for (i = 0; i < 4; i++) {
	up = (U32*)(buf + i);
	if (! ((*up == 1 << (8*i)) ||   /* big-endian */
	       (*up == 1 << (8*(3-i)))  /* little-endian */
	      )
	   )
	{
	    printf("read failed (%x)\n", *up);
	    exit(2);
	}
    }

    /* write test */
    for (i = 0; i < 4; i++) {
	up = (U32*)(buf + i);
	*up = 0xBeef;
	if (*up != 0xBeef) {
	    printf("write failed (%x)\n", *up);
	    exit(3);
	}
    }

    exit(0);
#else
    printf("1\n");
    exit(1);
#endif
    return 0;
}
EOCP
set try
if eval $compile_ok; then
	echo "(Testing for character data alignment may crash the test.  That's okay.)" >&4
	$run ./try 2>&1 >/dev/null
	case "$?" in
	0)	cat >&4 <<EOM
You can access character data pretty unalignedly.
EOM
		d_u32align="$undef"
		;;
	*)	cat >&4 <<EOM
It seems that you must access character data in an aligned manner.
EOM
		d_u32align="$define"
		;;
	esac
else
	rp='Can you access character data at unaligned addresses?'
	dflt='n'
	. ./myread
	case "$ans" in
	[yY]*)	d_u32align="$undef"  ;;
	*)	d_u32align="$define" ;;
	esac
fi
$rm_try
;;
esac

: see if ualarm exists
set ualarm d_ualarm
eval $inlibc

: see if umask exists
set umask d_umask
eval $inlibc

: see if unordered exists
set unordered d_unordered
eval $inlibc

: see if unsetenv exists
set unsetenv d_unsetenv
eval $inlibc

: see if usleep exists
set usleep d_usleep
eval $inlibc

: see if prototype for usleep is available
echo " "
set d_usleepproto usleep $i_unistd unistd.h
eval $hasproto

: see if ustat exists
set ustat d_ustat
eval $inlibc

: see if closedir exists
set closedir d_closedir
eval $inlibc

case "$d_closedir" in
"$define")
	echo " "
	echo "Checking whether closedir() returns a status..." >&4
	cat > try.c <<EOM
#$i_dirent I_DIRENT		/**/
#$i_sysdir I_SYS_DIR		/**/
#$i_sysndir I_SYS_NDIR		/**/
#$i_systypes I_SYS_TYPES	/**/

#if defined(I_SYS_TYPES)
#include <sys/types.h>
#endif
#if defined(I_DIRENT)
#include <dirent.h>
#else
#ifdef I_SYS_NDIR
#include <sys/ndir.h>
#else
#ifdef I_SYS_DIR
#include <sys/dir.h>
#endif
#endif
#endif
int main() { return closedir(opendir(".")); }
EOM
	set try
	if eval $compile_ok; then
		if $run ./try > /dev/null 2>&1 ; then
			echo "Yes, it does."
			val="$undef"
		else
			echo "No, it doesn't."
			val="$define"
		fi
	else
		echo "(I can't seem to compile the test program--assuming it doesn't)"
		val="$define"
	fi
	;;
*)
	val="$undef";
	;;
esac
set d_void_closedir
eval $setvar
$rm_try

: see if there is a wait4
set wait4 d_wait4
eval $inlibc

: see if waitpid exists
set waitpid d_waitpid
eval $inlibc

: see if wcrtomb exists
set wcrtomb d_wcrtomb
eval $inlibc

: look for wcscmp
echo " "
$cat >try.c <<'EOCP'
#include <stdio.h>
#include <wchar.h>
int main ()
{
    wchar_t *s = L" ";
    return (wcscmp (s, s) ? 1 : 0);
    }
EOCP
set try
val="$undef"
if eval $compile; then
    `$run ./try`
    case "$?" in
	0)  echo "A working wcscmp() found." >&4
	    val="$define" ;;
	*)  echo "wcscmp() found, but it doesn't work" >&4
	    ;;
	esac
else
    echo "wcscmp() NOT found." >&4
    fi
set d_wcscmp
eval $setvar
$rm_try

: see if wcstombs exists
set wcstombs d_wcstombs
eval $inlibc

: look for wcsxfrm
echo " "
$cat >try.c <<'EOCP'
#include <errno.h>
#include <wchar.h>
int main ()
{
    wchar_t dst[4], *src = L" ";
    errno = 0;
    return (wcsxfrm (dst, src, 1) ? errno ? errno : 0 : 1);
    }
EOCP
set try
val="$undef"
if eval $compile; then
    `$run ./try`
    case "$?" in
	0)  echo "A working wcsxfrm() found." >&4
	    val="$define" ;;
	*)  echo "wcsxfrm() found, but it doesn't work" >&4
	    ;;
	esac
else
    echo "wcsxfrm() NOT found." >&4
    fi
set d_wcsxfrm
eval $setvar
$rm_try

: see if wctomb exists
set wctomb d_wctomb
eval $inlibc

: see if writev exists
set writev d_writev
eval $inlibc

: check for alignment requirements
echo " "
case "$alignbytes" in
    '') echo "Checking alignment constraints..." >&4
	$cat >try.c <<EOCP
#include <stdio.h>
struct foobar {
    char foo;
    $nvtype bar;
} try_algn;
int main()
{
    printf("%d\n", (int)((char *)&try_algn.bar - (char *)&try_algn.foo));
    return(0);
}
EOCP
	set try
	if eval $compile_ok; then
	    dflt=`$run ./try`
	else
	    dflt='8'
	    echo "(I can't seem to compile the test program...)"
	fi
	case "$multiarch" in
	    *$define*)
		: The usual safe value is 8, but Darwin with -Duselongdouble
		: needs 16.  Hence, we will take 8 as a minimum, but allow
		: Configure to pick a larger value if needed.
		if $test "$dflt" -lt 8; then
		    dflt='8'
		    echo "Setting alignment to 8 for multiarch support.">&4
		fi
		;;
	esac
	;;
    *) dflt="$alignbytes"
	;;
esac
rp="Doubles must be aligned on a how-many-byte boundary?"
. ./myread
alignbytes="$ans"
$rm_try

: set the base revision
baserev=5.0

: length of character in bytes. Is always 1, otherwise it is not C
: This used to be a test using sizeof
charsize=1

: Check for the number of bits in a character
case "$charbits" in
'')	echo "Checking how long a character is (in bits)..." >&4
	$cat >try.c <<EOCP
#include <stdio.h>
int main ()
{
    int n;
    unsigned char c;
    for (c = 1, n = 0; c; c <<= 1, n++) ;
    printf ("%d\n", n);
    return (0);
    }
EOCP
	set try
	if eval $compile_ok; then
		dflt=`$run ./try`
	else
		dflt='8'
		echo "(I can't seem to compile the test program.  Guessing...)"
	fi
	;;
*)
	dflt="$charbits"
	;;
esac
rp="What is the length of a character (in bits)?"
. ./myread
charbits="$ans"
$rm_try
case "$charbits" in
8)	;;
*)	cat >&4 << EOM
Your system has an unsigned character size of $charbits bits, which
is rather unusual (normally it is 8 bits).  Perl likely will not work
correctly on your system, with subtle bugs in various places.
EOM
	rp='Do you really want to continue?'
	dflt='n'
	. ./myread
	case "$ans" in
		[yY])	echo >&4 "Okay, continuing."	;;
		*)	exit 1				;;
	esac
esac

: how do we concatenate cpp tokens here?
echo " "
echo "Checking to see how your cpp does stuff like concatenate tokens..." >&4
$cat >cpp_stuff.c <<'EOCP'
#define RCAT(a,b)a/**/b
#define ACAT(a,b)a ## b
RCAT(Rei,ser)
ACAT(Cir,cus)
EOCP
$cppstdin $cppflags $cppminus <cpp_stuff.c >cpp_stuff.out 2>&1
if $contains 'Circus' cpp_stuff.out >/dev/null 2>&1; then
	echo "Oh!  Smells like ANSI's been here." >&4
	echo "We can catify or stringify, separately or together!"
	cpp_stuff=42
elif $contains 'Reiser' cpp_stuff.out >/dev/null 2>&1; then
	echo "Ah, yes!  The good old days!" >&4
	echo "However, in the good old days we don't know how to stringify and"
	echo "catify at the same time."
	cpp_stuff=1
else
	$cat >&4 <<EOM
Hmm, I don't seem to be able to concatenate tokens with your cpp.
You're going to have to edit the values of CAT[2-5] in config.h...
EOM
	cpp_stuff="/* Help! How do we handle cpp_stuff? */*/"
fi
$rm -f cpp_stuff.*

: see if this is a db.h system
set db.h i_db
eval $inhdr

case "$i_db" in
$define)
	: Check db version.
	echo " "
	echo "Checking Berkeley DB version ..." >&4
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <db.h>
int main(int argc, char *argv[])
{
#ifdef DB_VERSION_MAJOR	/* DB version >= 2 */
    int Major, Minor, Patch ;
    unsigned long Version ;
    (void)db_version(&Major, &Minor, &Patch) ;
    if (argc == 2) {
        printf("%d %d %d %d %d %d\n",
               DB_VERSION_MAJOR, DB_VERSION_MINOR, DB_VERSION_PATCH,
               Major, Minor, Patch);
        exit(0);
    }
    printf("You have Berkeley DB Version 2 or greater.\n");

    printf("db.h is from Berkeley DB Version %d.%d.%d\n",
		DB_VERSION_MAJOR, DB_VERSION_MINOR, DB_VERSION_PATCH);
    printf("libdb is from Berkeley DB Version %d.%d.%d\n",
		Major, Minor, Patch) ;

    /* check that db.h & libdb are compatible */
    if (DB_VERSION_MAJOR != Major || DB_VERSION_MINOR != Minor || DB_VERSION_PATCH != Patch) {
	printf("db.h and libdb are incompatible.\n") ;
        exit(3);
    }

    printf("db.h and libdb are compatible.\n") ;

    Version = DB_VERSION_MAJOR * 1000000 + DB_VERSION_MINOR * 1000
		+ DB_VERSION_PATCH ;

    /* needs to be >= 2.3.4 */
    if (Version < 2003004) {
    /* if (DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR == 0 && DB_VERSION_PATCH < 5) { */
	printf("Perl needs Berkeley DB 2.3.4 or greater.\n") ;
        exit(2);
    }

    exit(0);
#else
#if defined(_DB_H_) && defined(BTREEMAGIC) && defined(HASHMAGIC)
    if (argc == 2) {
        printf("1 0 0\n");
        exit(0);
    }
    printf("You have Berkeley DB Version 1.\n");
    exit(0);	/* DB version < 2: the coast is clear. */
#else
    exit(1);	/* <db.h> not Berkeley DB? */
#endif
#endif
}
EOCP
	set try
	if eval $compile_ok && $run ./try; then
		echo 'Looks OK.' >&4
		set `$run ./try 1`
		db_version_major=$1
		db_version_minor=$2
		db_version_patch=$3
	else
		echo "I can't use Berkeley DB with your <db.h>.  I'll disable Berkeley DB." >&4
		i_db=$undef
		case " $libs " in
		*"-ldb "*)
			: Remove db from list of libraries to use
			echo "Removing unusable -ldb from library list" >&4
			set `echo X $libs | $sed -e 's/-ldb / /' -e 's/-ldb$//'`
			shift
			libs="$*"
			echo "libs = $libs" >&4
			;;
		esac
	fi
	$rm_try
	;;
esac

case "$i_db" in
define)
	: Check the return type needed for hash
	echo " "
	echo "Checking return type needed for hash for Berkeley DB ..." >&4
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <db.h>

#ifndef DB_VERSION_MAJOR
u_int32_t hash_cb (const void* ptr, size_t size)
{
	return 0;
}
HASHINFO info;
int main()
{
	info.hash = hash_cb;
}
#endif
EOCP
	if $cc $ccflags -c try.c >try.out 2>&1 ; then
		if $compiler_warning try.out >>/dev/null 2>&1 ; then
			db_hashtype='int'
		else
			db_hashtype='u_int32_t'
		fi
	else
		: XXX Maybe we should just give up here.
		db_hashtype=u_int32_t
		$cat try.out >&4
		echo "Help:  I can't seem to compile the db test program." >&4
		echo "Something's wrong, but I'll assume you use $db_hashtype." >&4
	fi
	$rm_try
	echo "Your version of Berkeley DB uses $db_hashtype for hash."
	;;
*)	db_hashtype=u_int32_t
	;;
esac
case "$i_db" in
define)
	: Check the return type needed for prefix
	echo " "
	echo "Checking return type needed for prefix for Berkeley DB ..." >&4
	cat >try.c <<EOCP
#include <sys/types.h>
#include <db.h>

#ifndef DB_VERSION_MAJOR
size_t prefix_cb (const DBT *key1, const DBT *key2)
{
	return 0;
}
BTREEINFO info;
int main()
{
	info.prefix = prefix_cb;
}
#endif
EOCP
	if $cc $ccflags -c try.c  >try.out 2>&1 ; then
		if $compiler_warning try.out >>/dev/null 2>&1 ; then
			db_prefixtype='int'
		else
			db_prefixtype='size_t'
		fi
	else
		db_prefixtype='size_t'
		: XXX Maybe we should just give up here.
		$cat try.out >&4
		echo "Help:  I can't seem to compile the db test program." >&4
		echo "Something's wrong, but I'll assume you use $db_prefixtype." >&4
	fi
	$rm_try
	echo "Your version of Berkeley DB uses $db_prefixtype for prefix."
	;;
*)	db_prefixtype='size_t'
	;;
esac

: Include . in @INC
$cat <<EOM

Historically Perl has provided a final fallback of the current working
directory '.' when searching for a library. This, however, can lead to
problems when a Perl program which loads optional modules is called from
a shared directory. This can lead to executing unexpected code.

EOM

# When changing to exclude by default:
case "$default_inc_excludes_dot" in
    $undef|false|[nN]*) dflt="n" ;;
    *)                  dflt="y" ;;
esac
# To turn exclude off by default:
#case "$default_inc_excludes_dot" in
#    $define|true|[yY]*) dflt="y" ;;
#    *)                  dflt="n" ;;
#esac

rp='Exclude '.' from @INC by default? '
. ./myread
case "$ans" in
    [nN]|undef) default_inc_excludes_dot="$undef"  ;;
    *)          default_inc_excludes_dot="$define" ;;
esac

: Check what kind of inf/nan your system has
$echo "Checking the kind of infinities and nans you have..." >&4
$echo "(The following tests may crash.  That's okay.)" >&4
$cat >try.c <<EOP
#define DOUBLESIZE $doublesize
#$d_longdbl HAS_LONG_DOUBLE
#ifdef HAS_LONG_DOUBLE
#define LONG_DOUBLESIZE $longdblsize
#define LONG_DOUBLEKIND $longdblkind
#endif
#include <math.h>
#include <string.h>
#include <stdio.h>
/* Note that whether the sign bit is on or off
 * for NaN depends on the CPU/FPU, and possibly
 * can be affected by the build toolchain.
 *
 * For example for older MIPS and HP-PA 2.0 the quiet NaN is:
 * 0x7f, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
 * 0x7f, 0xf4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 * (respectively) as opposed to the more usual
 * 0x7f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 *
 * Pre-IEEE-754 floating point format do not even have inf/nan support
 * at all.  They might have a "max" value (DBL_MAX), which may be deadly
 * to even mention, causing immediate SIGFPE or equivalent: this is
 * the case with VAX floating point, for example.
 */
static void bytes(void *v, unsigned int n) {
  unsigned char *p = (unsigned char *)v;
  int i;
  for (i = 0; i < n; i++) {
    printf("0x%02x%s", p[i], i < n - 1 ? ", " : "\n");
  }
}
int main(int argc, char *argv[]) {
   /* We cannot use 1.0/0.0 and 0.0/0.0 (with L suffixes for long double)
    * because some compilers are 'smart' and not only warn but refuse to
    * compile such 'illegal' values. */
   double dinf = exp(1e9);
   double dnan = sqrt(-1.0);
#ifdef HAS_LONG_DOUBLE
   long double ldinf = (long double)exp(1e9);
   long double ldnan = (long double)sqrt(-1.0);
# if LONG_DOUBLEKIND == 3 || LONG_DOUBLEKIND == 4
/* the 80-bit long doubles might have garbage in their excess bytes */
    memset((char *)&ldinf + 10, '\0', LONG_DOUBLESIZE - 10);
    memset((char *)&ldnan + 10, '\0', LONG_DOUBLESIZE - 10);
# endif
#endif
  if (argc == 2) {
    switch (argv[1][0]) {
    case '1': bytes(&dinf, sizeof(dinf)); break;
    case '2': bytes(&dnan, sizeof(dnan)); break;
#ifdef HAS_LONG_DOUBLE
    case '3': bytes(&ldinf, sizeof(ldinf)); break;
    case '4': bytes(&ldnan, sizeof(ldnan)); break;
#endif
    }
  }
  return 0;
}
EOP
set try
if eval $compile; then
    doubleinfbytes=`$run ./try 1`
    doublenanbytes=`$run ./try 2`
    case "$d_longdbl" in
    $define)
      longdblinfbytes=`$run ./try 3`
      longdblnanbytes=`$run ./try 4`
      ;;
    esac
else
    # Defaults in case the above test program failed.
    case "$doublekind" in
    1) # IEEE 754 32-bit LE
       doubleinfbytes='0x00, 0x00, 0xf0, 0x7f'
       doublenanbytes='0x00, 0x00, 0xf8, 0x7f'
       ;;
    2) # IEEE 754 32-bit BE
       doubleinfbytes='0x7f, 0xf0, 0x00, 0x00'
       doublenanbytes='0x7f, 0xf8, 0x00, 0x00'
       ;;
    3) # IEEE 754 64-bit LE
       doubleinfbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x7f'
       doublenanbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x7f'
       ;;
    4) # IEEE 754 64-bit BE
       doubleinfbytes='0x7f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       doublenanbytes='0x7f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       ;;
    5) # IEEE 754 128-bit LE
       doubleinfbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x7f'
       doublenanbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x7f'
       ;;
    6) # IEEE 754 128-bit BE
       doubleinfbytes='0x7f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       doublenanbytes='0x7f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       ;;
    7) # IEEE 754 64-bit mixed: 32-bit LEs in BE
       doubleinfbytes='0x00, 0x00, 0xf0, 0x7f, 0x00, 0x00, 0x00, 0x00'
       doublenanbytes='0x00, 0x00, 0xf8, 0x7f, 0x00, 0x00, 0x00, 0x00'
       ;;
    8) # IEEE 754 64-bit mixed: 32-bit BEs in LE
       doubleinfbytes='0x00, 0x00, 0x00, 0x00, 0x7f, 0xf0, 0x00, 0x00'
       doublenanbytes='0x00, 0x00, 0x00, 0x00, 0x7f, 0xf8, 0x00, 0x00'
       ;;
    9|10|11|12|13|14) # VAX/Cray/IBM floating point formats, no inf/nan.
       doubleinfbytes=$undef
       doublenanbytes=$undef
       ;;
    *) # No idea.
       doubleinfbytes=$undef
       doublenanbytes=$undef
       ;;
    esac
    case "$longdblkind" in
    1) # IEEE 754 128-bit LE
       longdblinfbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x7f'
       longdblnanbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xff, 0x7f'
       ;;
    2) # IEEE 754 128-bit BE
       longdblinfbytes='0x7f, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       longdblnanbytes='0x7f, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       ;;
    3) # IEEE 754 80-bit LE, 12 or 16 bytes (x86)
       case "$longdblsize" in
       12) # x86 32-bit (96 bits, or 4 x 32, or 12 x 8)
           longdblinfbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xff, 0x7f, 0x00, 0x00'
           longdblnanbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xff, 0x7f, 0x00, 0x00'
           ;;
       16) # x86_64
           longdblinfbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
           longdblnanbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
           ;;
       *)  # No idea.
           longdblinfbytes=$undef
           longdblnanbytes=$undef
       ;;
       esac
       ;;
    4) # IEEE 754 80-bit BE, 12 or 16 bytes
       case "$longdblsize" in
       12) # 32-bit system
           longdblinfbytes='0x7f, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
           longdblnanbytes='0x7f, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
           ;;
       16) # 64-bit system
           longdblinfbytes='0x7f, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
           longdblnanbytes='0x7f, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
           ;;
       *)  # No idea.
           longdblinfbytes=$undef
           longdblnanbytes=$undef
       ;;
       esac
       ;;
    5) # 128-bit LE-LE "double double"
       longdblinfbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x7f'
       longdblnanbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x7f'
       ;;
    6) # 128-bit BE-BE "double double"
       longdblinfbytes='0x7f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       longdblnanbytes='0x7f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       ;;
    7) # 128-bit LE-BE "double double"
       longdblinfbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       longdblnanbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       ;;
    8) # 128-bit BE-LE "double double"
       longdblinfbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       longdblnanbytes='0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00'
       ;;
    9|10|11|12|13|14) # VAX/Cray/IBM floating point formats, no inf/nan.
       longdblinfbytes=$undef
       longdblnanbytes=$undef
       ;;
    *) # No idea.
       longdblinfbytes=$undef
       longdblnanbytes=$undef
       ;;
    esac
fi
# In case the program crashed the values are empty, turn them undef.
case "$doubleinfbytes" in
'') doubleinfbytes=$undef ;;
esac
case "$doublenanbytes" in
'') doublenanbytes=$undef ;;
esac
case "$longdblinfbytes" in
'') longdblinfbytes=$undef ;;
esac
case "$longdblnanbytes" in
'') longdblnanbytes=$undef ;;
esac
$rm_try

: Check the length of the double mantissa
$echo "Checking how many mantissa bits your doubles have..." >&4
$cat >try.c <<EOP
#$i_sunmath I_SUNMATH
#include <float.h>
#ifdef I_SUNMATH
# include <sunmath.h>
#endif
#ifdef DBL_MANT_DIG
# define BITS (DBL_MANT_DIG - 1) /* the implicit bit does not count */
#endif
#include <stdio.h>
int main(int argc, char *argv[]) {
#ifdef BITS
  printf("%d\n", BITS);
#endif
  return 0;
}
EOP
set try
if eval $compile; then
    doublemantbits=`$run ./try`
else
    doublemantbits="$undef"
fi
$rm_try

: Check the length of the longdouble mantissa
$echo "Checking how many mantissa bits your long doubles have..." >&4
$cat >try.c <<EOP
#$i_sunmath I_SUNMATH
#include <float.h>
#ifdef I_SUNMATH
# include <sunmath.h>
#endif
#$d_longdbl HAS_LONG_DOUBLE
#if defined(HAS_LONG_DOUBLE) && defined(LDBL_MANT_DIG)
# if ($longdblkind == 3) || ($longdblkind == 4) /* 80-bit extended precision */
/* This format has no implicit bit.  Beware, however, that for
 * this format the bare LDBL_MANT_DIG is misleading for inf/nan:
 * the top three bits are used for inf (100) / qnan (11x) / snan (101),
 * and the top bit must have been one since 387, zero is plain invalid.
 * For normal fp values, the LDBL_MANT_DIG is fine, though. */
#  define BITS LDBL_MANT_DIG
# elif ($longdblkind == 5 || $longdblkind == 6 || $longdblkind == 7 || $longdblkind == 8) /* double double */
/* LDBL_MANT_DIG of 106 (twice 53) would be logical, but for some
 * reason e.g. Irix thinks 107.  But in any case, we want only
 * the number of real bits, the implicit bits are of no interest.  */
#  define BITS 2 * (DBL_MANT_DIG - 1)
# else
#  define BITS (LDBL_MANT_DIG - 1) /* the implicit bit does not count */
# endif
#endif
#include <stdio.h>
int main(int argc, char *argv[]) {
#ifdef BITS
  printf("%d\n", BITS);
#endif
  return 0;
}
EOP
set try
if eval $compile; then
    longdblmantbits=`$run ./try`
else
    longdblmantbits="$undef"
fi
$rm_try

: Check the length of the NV mantissa
$echo "Checking how many mantissa bits your NVs have..." >&4
if test "X$usequadmath" = "X$define"; then
  nvmantbits=112 # 128-1-15
else
  if test "X$nvsize" = "X$doublesize"; then
    nvmantbits="$doublemantbits"
  else
     if test "X$nvsize" = "X$longdblsize"; then
       nvmantbits="$longdblmantbits"
     else
       nvmantbits="$undef"
     fi
  fi
fi

: How can we generate normalized random numbers ?
echo " "
echo "Using our internal random number implementation..." >&4

case "$ccflags" in
*-Dmy_rand=*|*-Dmy_srand=*)
	echo "Removing obsolete -Dmy_rand, -Dmy_srand, and -Drandbits from ccflags." >&4
	ccflags="`echo $ccflags | sed -e 's/-Dmy_rand=random/ /'`"
	ccflags="`echo $ccflags | sed -e 's/-Dmy_srand=srandom/ /'`"
	ccflags="`echo $ccflags | sed -e 's/-Drandbits=[0-9][0-9]*/ /'`"
	;;
esac

randfunc=Perl_drand48
drand01="Perl_drand48()"
seedfunc="Perl_drand48_init"
randbits=48
randseedtype=U32

: Probe whether dtrace builds an object, as newer Illumos requires an input
: object file that uses at least one of the probes defined in the .d file
case "$usedtrace" in
$define)
    case "$dtracexnolibs" in
    $define|true|[yY]*)
        dtracexnolibs=$define
	$dtrace -h -xnolibs -s ../perldtrace.d -o perldtrace.h
	;;
    ' '|'')
        if $dtrace -h -xnolibs -s ../perldtrace.d -o perldtrace.h 2>&1 ; then
	     dtracexnolibs=$define
	     echo "Your dtrace accepts -xnolibs"
	elif $dtrace -h -s ../perldtrace.d -o perldtrace.h 2>&1 ; then
	     dtracexnolibs=$undef
	     echo "Your dtrace doesn't accept -xnolibs"
	else
             echo "Your dtrace doesn't work at all, try building without dtrace support" >&4
	     exit 1
	fi
	;;
    *)
        dtracexnolibs=$undef
	$dtrace -h -s ../perldtrace.d -o perldtrace.h
	;;
    esac
    case $dtracexnolibs in
    $define) xnolibs=-xnolibs ;;
    *) xnolibs= ;;
    esac

    case "$dtraceobject" in
    $define|true|[yY]*)
        dtraceobject=$define
        ;;
    ' '|'')
        $cat >try.c <<EOM
#include "perldtrace.h"
int main(void) {
    PERL_LOADED_FILE("dummy");
    return 0;
}
EOM
        dtraceobject=$undef
        if $cc -c -o try.o $optimize $ccflags try.c \
                    && $dtrace -G $xnolibs -s ../perldtrace.d try.o >/dev/null 2>&1; then
                dtraceobject=$define
            echo "Your dtrace builds an object file"
        fi
        ;;
    *) dtraceobject=$undef ;;
    esac
    $rm_try perldtrace.o perldtrace.h
esac

: Determine if this is an EBCDIC system
echo " "
echo "Determining whether or not we are on an EBCDIC system..." >&4
$cat >try.c <<'EOM'
int main()
{
  if ('M'==0xd4) return 0;
  return 1;
}
EOM

val=$undef
set try
if eval $compile_ok; then
	if $run ./try; then
		echo "You seem to speak EBCDIC." >&4
		val="$define"
	else
		echo "Nope, no EBCDIC, probably ASCII or some ISO Latin. Or UTF-8." >&4
	fi
else
	echo "I'm unable to compile the test program." >&4
	echo "I'll assume ASCII or some ISO Latin. Or UTF8." >&4
fi
$rm_try
set ebcdic
eval $setvar

: Check how to flush
echo " "
$cat >&4 <<EOM
Checking how to flush all pending stdio output...
EOM
# I only know how to find the first 32 possibly open files on SunOS.
# See also hints/sunos_4_1.sh and util.c  --AD
case "$osname" in
sunos) $echo '#define PERL_FFLUSH_ALL_FOPEN_MAX 32' > try.c ;;
esac
$cat >>try.c <<EOCP
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#$i_unistd I_UNISTD
#ifdef I_UNISTD
# include <unistd.h>
#endif
#$d_sysconf HAS_SYSCONF
#$d_stdio_stream_array HAS_STDIO_STREAM_ARRAY
#ifdef HAS_STDIO_STREAM_ARRAY
# define STDIO_STREAM_ARRAY $stdio_stream_array
#endif
int main() {
  FILE* p;
  unlink("try.out");
  p = fopen("try.out", "w");
#ifdef TRY_FPUTC
  fputc('x', p);
#else
# ifdef TRY_FPRINTF
  fprintf(p, "x");
# endif
#endif
#ifdef TRY_FFLUSH_NULL
  fflush(NULL);
#endif
#ifdef TRY_FFLUSH_ALL
  {
    long open_max = -1;
# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
    open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
# else
#  if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
    open_max = sysconf(_SC_OPEN_MAX);
#  else
#   ifdef FOPEN_MAX
    open_max = FOPEN_MAX;
#   else
#    ifdef OPEN_MAX
    open_max = OPEN_MAX;
#    else
#     ifdef _NFILE
    open_max = _NFILE;
#     endif
#    endif
#   endif
#  endif
# endif
# ifdef HAS_STDIO_STREAM_ARRAY
    if (open_max > 0) {
      long i;
      for (i = 0; i < open_max; i++)
	    if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
		STDIO_STREAM_ARRAY[i]._file < open_max &&
		STDIO_STREAM_ARRAY[i]._flag)
		fflush(&STDIO_STREAM_ARRAY[i]);
    }
# endif
  }
#endif
  _exit(42);
}
EOCP
: first we have to find out how _not_ to flush
$to try.c
if $test "X$fflushNULL" = X -o "X$fflushall" = X; then
    output=''
    set try -DTRY_FPUTC
    if eval $compile; then
	    $run ./try 2>/dev/null
	    code="$?"
	    $from try.out
	    if $test ! -s try.out -a "X$code" = X42; then
		output=-DTRY_FPUTC
	    fi
    fi
    case "$output" in
    '')
	    set try -DTRY_FPRINTF
	    if eval $compile; then
		    $run ./try 2>/dev/null
		    code="$?"
		    $from try.out
		    if $test ! -s try.out -a "X$code" = X42; then
			output=-DTRY_FPRINTF
		    fi
	    fi
	;;
    esac
fi
: check for fflush NULL behavior
case "$fflushNULL" in
'')	set try -DTRY_FFLUSH_NULL $output
	if eval $compile; then
		$run ./try 2>/dev/null
		code="$?"
		$from try.out
		if $test -s try.out -a "X$code" = X42; then
			fflushNULL="`$cat try.out`"
		else
			if $test "X$code" != X42; then
				$cat >&4 <<EOM
(If this test failed, don't worry, we'll try another method shortly.)
EOM
			fi
		fi
	fi
	$rm -f core try.core core.try.*
	case "$fflushNULL" in
	x)	$cat >&4 <<EOM
Your fflush(NULL) works okay for output streams.
Let's see if it clobbers input pipes...
EOM
# As of mid-March 2000 all versions of Solaris appear to have a stdio
# bug that improperly flushes the input end of pipes.  So we avoid the
# autoflush on fork/system/exec support for now. :-(
$cat >tryp.c <<EOCP
#include <stdio.h>
int
main(int argc, char **argv)
{
    char buf[1024];
    int i;
    char *bp = buf;
    while (1) {
	while ((i = getc(stdin)) != -1
	       && (*bp++ = i) != '\n'
	       && bp < &buf[1024])
	/* DO NOTHING */ ;
	*bp = '\0';
	fprintf(stdout, "%s", buf);
	fflush(NULL);
	if (i == -1)
	    return 0;
	bp = buf;
    }
}
EOCP
		fflushNULL="$define"
		set tryp
		if eval $compile; then
		    $rm -f tryp.out
		    # Copy the .c file to the remote host ($to is an ssh-alike if targethost is set)
		    if $test "X$targethost" != X; then
			$to tryp.c
			$to tryp
			$run "cat tryp.c | ./tryp " 2>/dev/null > tryp.out
		    else
			$cat tryp.c | $run ./tryp   2>/dev/null > tryp.out
		    fi
		    if cmp tryp.c tryp.out >/dev/null 2>&1; then
		       $cat >&4 <<EOM
fflush(NULL) seems to behave okay with input streams.
EOM
			fflushNULL="$define"
		    else
			$cat >&4 <<EOM
Ouch, fflush(NULL) clobbers input pipes!  We will not use it.
EOM
			fflushNULL="$undef"
		    fi
		fi
		$rm -f core tryp.c tryp.core core.tryp.*
		;;
	'')	$cat >&4 <<EOM
Your fflush(NULL) isn't working (contrary to ANSI C).
EOM
		fflushNULL="$undef"
		;;
	*)	$cat >&4 <<EOM
Cannot figure out whether your fflush(NULL) works or not.
I'm assuming it doesn't (contrary to ANSI C).
EOM
		fflushNULL="$undef"
		;;
	esac
	;;
$define|true|[yY]*)
	fflushNULL="$define"
	;;
*)
	fflushNULL="$undef"
	;;
esac
: check explicit looping only if NULL did not work, and if the pipe
: bug does not show up on an explicit flush too
case "$fflushNULL" in
"$undef")
	$cat >tryp.c <<EOCP
#include <stdio.h>
int
main(int argc, char **argv)
{
    char buf[1024];
    int i;
    char *bp = buf;
    while (1) {
	while ((i = getc(stdin)) != -1
	       && (*bp++ = i) != '\n'
	       && bp < &buf[1024])
	/* DO NOTHING */ ;
	*bp = '\0';
	fprintf(stdout, "%s", buf);
	fflush(stdin);
	if (i == -1)
	    return 0;
	bp = buf;
    }
}
EOCP
	set tryp
	if eval $compile; then
	    $rm -f tryp.out
	    if $test "X$targethost" != X; then
		$to tryp.c
		$to tryp
		$run "cat tryp.c | ./tryp " 2>/dev/null > tryp.out
	    else
		$cat tryp.c | $run ./tryp   2>/dev/null > tryp.out
	    fi
	    if cmp tryp.c tryp.out >/dev/null 2>&1; then
	       $cat >&4 <<EOM
Good, at least fflush(stdin) seems to behave okay when stdin is a pipe.
EOM
		: now check for fflushall behaviour
		case "$fflushall" in
		'')	set try -DTRY_FFLUSH_ALL $output
			if eval $compile; then
				$cat >&4 <<EOM
(Now testing the other method--but note that this also may fail.)
EOM
				$run ./try 2>/dev/null
				code=$?
				$from try.out
				if $test -s try.out -a "X$code" = X42; then
					fflushall="`$cat try.out`"
				fi
			fi
			$rm_try
			case "$fflushall" in
			x)	$cat >&4 <<EOM
Whew. Flushing explicitly all the stdio streams works.
EOM
				fflushall="$define"
				;;
			'')	$cat >&4 <<EOM
Sigh. Flushing explicitly all the stdio streams doesn't work.
EOM
				fflushall="$undef"
				;;
			*)	$cat >&4 <<EOM
Cannot figure out whether flushing stdio streams explicitly works or not.
I'm assuming it doesn't.
EOM
				fflushall="$undef"
				;;
			esac
			;;
		"$define"|true|[yY]*)
			fflushall="$define"
			;;
		*)
			fflushall="$undef"
			;;
		esac
	    else
		$cat >&4 <<EOM
All is futile.  Even fflush(stdin) clobbers input pipes!
EOM
		fflushall="$undef"
	    fi
	else
	    fflushall="$undef"
	fi
	$rm -f core tryp.c tryp.core core.tryp.*
	;;
*)	fflushall="$undef"
	;;
esac

case "$fflushNULL$fflushall" in
undefundef)
	$cat <<EOM
OK, I give up.  I cannot figure out how to flush pending stdio output.
We won't be flushing handles at all before fork/exec/popen.
EOM
	;;
esac
$rm_try tryp

: Store the full pathname to the ar program for use in the C program
: Respect a hint or command line value for full_ar.
case "$full_ar" in
'') full_ar=$ar ;;
esac

: Store the full pathname to the sed program for use in the C program
full_sed=$sed

: see what type gids are declared as in the kernel
echo " "
echo "Looking for the type for group ids returned by getgid()."
set gid_t gidtype xxx stdio.h sys/types.h
eval $typedef
case "$gidtype" in
xxx)
	xxx=`./findhdr sys/user.h`
	set `grep 'groups\[NGROUPS\];' "$xxx" 2>/dev/null` unsigned short
	case $1 in
	unsigned) dflt="$1 $2" ;;
	*) dflt="$1" ;;
	esac
	;;
*) dflt="$gidtype";;
esac
case "$gidtype" in
gid_t) echo "gid_t found." ;;
*)	rp="What is the type for group ids returned by getgid()?"
	. ./myread
	gidtype="$ans"
	;;
esac

: Check the size of GID
echo " "
case "$gidtype" in
*_t) zzz="$gidtype"	;;
*)   zzz="gid"		;;
esac
echo "Checking the size of $zzz..." >&4
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
    printf("%d\n", (int)sizeof($gidtype));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	yyy=`$run ./try`
	case "$yyy" in
	'')	gidsize=4
		echo "(I can't execute the test program--guessing $gidsize.)" >&4
		;;
	*)	gidsize=$yyy
		echo "Your $zzz is $gidsize bytes long."
		;;
	esac
else
	gidsize=4
	echo "(I can't compile the test program--guessing $gidsize.)" >&4
fi

: Check if GID is signed
echo " "
case "$gidtype" in
*_t) zzz="$gidtype"	;;
*)   zzz="gid"		;;
esac
echo "Checking the sign of $zzz..." >&4
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
	$gidtype foo = -1;
	if (foo < 0)
		printf("-1\n");
	else
		printf("1\n");
}
EOCP
set try
if eval $compile; then
	yyy=`$run ./try`
	case "$yyy" in
	'')	gidsign=1
		echo "(I can't execute the test program--guessing unsigned.)" >&4
		;;
	*)	gidsign=$yyy
		case "$gidsign" in
		 1) echo "Your $zzz is unsigned." ;;
		-1) echo "Your $zzz is signed."   ;;
		esac
		;;
	esac
else
	gidsign=1
	echo "(I can't compile the test program--guessing unsigned.)" >&4
fi

: Check 64bit sizes
echo " "

if $test X"$quadtype" != X; then

echo "Checking how to print 64-bit integers..." >&4

if $test X"$sPRId64" = X -a X"$quadtype" = Xint; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  int q = 12345678901;
  printf("%ld\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		12345678901)
			sPRId64='"d"'; sPRIi64='"i"'; sPRIu64='"u"';
			sPRIo64='"o"'; sPRIx64='"x"'; sPRIXU64='"X"';
			echo "We will use %d."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$quadtype" = Xlong; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long q = 12345678901;
  printf("%ld\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		12345678901)
			sPRId64='"ld"'; sPRIi64='"li"'; sPRIu64='"lu"';
			sPRIo64='"lo"'; sPRIx64='"lx"'; sPRIXU64='"lX"';
			echo "We will use %ld."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$i_inttypes" = X"$define" -a X"$quadtype" = Xint64_t; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <inttypes.h>
#include <stdio.h>
int main() {
  int64_t q = 12345678901;
  printf("%" PRId64 "\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		12345678901)
			sPRId64=PRId64; sPRIi64=PRIi64; sPRIu64=PRIu64;
			sPRIo64=PRIo64; sPRIx64=PRIx64; sPRIXU64=PRIX64;
			echo "We will use the C9X style."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$quadtype" = X"long long"; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long long q = 12345678901LL; /* AIX cc requires the LL suffix. */
  printf("%lld\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		12345678901)
			sPRId64='"lld"'; sPRIi64='"lli"'; sPRIu64='"llu"';
			sPRIo64='"llo"'; sPRIx64='"llx"'; sPRIXU64='"llX"';
			echo "We will use the %lld style."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$quadtype" != X; then
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
  $quadtype q = 12345678901;
  printf("%qd\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		12345678901)
			sPRId64='"qd"'; sPRIi64='"qi"'; sPRIu64='"qu"';
			sPRIo64='"qo"'; sPRIx64='"qx"'; sPRIXU64='"qX"';
			echo "We will use %qd."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$quadtype" != X; then
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
  $quadtype q = 12345678901;
  printf("%Ld\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`$run ./try`
		case "$yyy" in
		12345678901)
			sPRId64='"Ld"'; sPRIi64='"Li"'; sPRIu64='"Lu"';
			sPRIo64='"Lo"'; sPRIx64='"Lx"'; sPRIXU64='"LX"';
			echo "We will use %Ld."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X; then
	echo "Cannot figure out how to print 64-bit integers." >&4
fi
$rm_try

fi

case "$sPRId64" in
'')	d_PRId64="$undef"; d_PRIi64="$undef"; d_PRIu64="$undef";
	d_PRIo64="$undef"; d_PRIx64="$undef"; d_PRIXU64="$undef";
	;;
*)	d_PRId64="$define"; d_PRIi64="$define"; d_PRIu64="$define";
	d_PRIo64="$define"; d_PRIx64="$define"; d_PRIXU64="$define";
	;;
esac

: Check format strings for internal types
echo " "
$echo "Checking the format strings to be used for Perl's internal types..." >&4

if $test X"$ivsize" = X8; then
	ivdformat="$sPRId64"
	uvuformat="$sPRIu64"
	uvoformat="$sPRIo64"
	uvxformat="$sPRIx64"
	uvXUformat="$sPRIXU64"
else
	if $test X"$ivsize" = X"$longsize"; then
		ivdformat='"ld"'
		uvuformat='"lu"'
		uvoformat='"lo"'
		uvxformat='"lx"'
		uvXUformat='"lX"'
	else
		if $test X"$ivsize" = X"$intsize"; then
			ivdformat='"d"'
			uvuformat='"u"'
			uvoformat='"o"'
			uvxformat='"x"'
			uvXUformat='"X"'
		else
			: far out
			if $test X"$ivsize" = X"$shortsize"; then
				ivdformat='"hd"'
				uvuformat='"hu"'
				uvoformat='"ho"'
				uvxformat='"hx"'
				uvXUformat='"hX"'
			fi
		fi
	fi
fi

if $test X"$usequadmath" = X"$define"; then
    nveformat='"Qe"'
    nvfformat='"Qf"'
    nvgformat='"Qg"'
    nvEUformat='"QE"'
    nvFUformat='"QF"'
    nvGUformat='"QG"'
else
    if $test X"$uselongdouble" = X"$define" -a X"$d_longdbl" = X"$define" -a X"$d_PRIgldbl" = X"$define"; then
	nveformat="$sPRIeldbl"
	nvfformat="$sPRIfldbl"
	nvgformat="$sPRIgldbl"
	nvEUformat="$sPRIEUldbl"
	nvFUformat="$sPRIFUldbl"
	nvGUformat="$sPRIGUldbl"
    else
	nveformat='"e"'
	nvfformat='"f"'
	nvgformat='"g"'
	nvEUformat='"E"'
	nvFUformat='"F"'
	nvGUformat='"G"'
    fi
fi

case "$ivdformat" in
'') echo "$0: Fatal: failed to find format strings, cannot continue." >&4
    exit 1
    ;;
esac

: Check format string for GID

echo " "
$echo "Checking the format string to be used for gids..." >&4

case "$gidsign" in
-1)	if $test X"$gidsize" = X"$ivsize"; then
		gidformat="$ivdformat"
	else
		if $test X"$gidsize" = X"$longsize"; then
			gidformat='"ld"'
		else
			if $test X"$gidsize" = X"$intsize"; then
				gidformat='"d"'
			else
				if $test X"$gidsize" = X"$shortsize"; then
					gidformat='"hd"'
				fi
			fi
		fi
	fi
	;;
*)	if $test X"$gidsize" = X"$uvsize"; then
		gidformat="$uvuformat"
	else
		if $test X"$gidsize" = X"$longsize"; then
			gidformat='"lu"'
		else
			if $test X"$gidsize" = X"$intsize"; then
				gidformat='"u"'
			else
				if $test X"$gidsize" = X"$shortsize"; then
					gidformat='"hu"'
				fi
			fi
		fi
	fi
	;;
esac

: see if getgroups exists
set getgroups d_getgrps
eval $inlibc

: see if setgroups exists
set setgroups d_setgrps
eval $inlibc

: Find type of 2nd arg to 'getgroups()' and 'setgroups()'
echo " "
case "$d_getgrps$d_setgrps" in
*define*)
	case "$groupstype" in
	'') dflt="$gidtype" ;;
	*)  dflt="$groupstype" ;;
	esac
	$cat <<EOM
What type of pointer is the second argument to getgroups() and setgroups()?
Usually this is the same as group ids, $gidtype, but not always.

EOM
	rp='What type pointer is the second argument to getgroups() and setgroups()?'
	. ./myread
	groupstype="$ans"
	;;
*)  groupstype="$gidtype";;
esac

: Check format strings for internal 32bit types
echo " "
$echo "Checking the format strings to be used for Perl's internal 32bit-types..." >&4

case "$i32dformat" in
'')	case "$i32type" in
	int)
		i32dformat='"d"'
		u32uformat='"u"'
		u32oformat='"o"'
		u32xformat='"x"'
		u32XUformat='"X"'
		;;
	long)
		i32dformat='"ld"'
		u32uformat='"lu"'
		u32oformat='"lo"'
		u32xformat='"lx"'
		u32XUformat='"lX"'
		;;
	int_least32_t)		: will not happen currently
		i32dformat=PRIdLEAST32
		u32uformat=PRIuLEAST32
		u32oformat=PRIoLEAST32
		u32xformat=PRIxLEAST32
		u32XUformat=PRIXLEAST32
		;;
	int32_t)
		i32dformat=PRId32
		u32uformat=PRIu32
		u32oformat=PRIo32
		u32xformat=PRIx32
		u32XUformat=PRIX32
		;;
	esac ;;
esac

case "$i32dformat" in
'') echo "$0: Fatal: failed to find format strings for 32-bit integers, cannot continue." >&4
    exit 1
    ;;
esac

: check whether make sets MAKE
echo " "
echo "Checking if your $make program sets \$(MAKE)..." >&4
case "$make_set_make" in
'')
	$sed 's/^X //' > testmake.mak << 'EOF'
Xall:
X 	@echo 'maketemp="$(MAKE)"'
EOF
	case "`$make -f testmake.mak 2>/dev/null`" in
	*maketemp=*) make_set_make='#' ;;
	*)	make_set_make="MAKE=$make" ;;
	esac
	$rm -f testmake.mak
	;;
esac
case "$make_set_make" in
'#') echo "Yup, it does.";;
*) echo "Nope, it doesn't.";;
esac

: see what type is used for mode_t
rp="What is the type used for file modes for system calls (e.g. fchmod())?"
set mode_t modetype int stdio.h sys/types.h
eval $typedef_ask

: see if we need va_copy
echo " "
$cat >try.c <<EOCP
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>

int
ivfprintf(FILE *f, const char *fmt, va_list *valp)
{
  return vfprintf(f, fmt, *valp);
}

int
myvfprintf(FILE *f, const  char *fmt, va_list val)
{
  return ivfprintf(f, fmt, &val);
}

int
myprintf(char *fmt, ...)
{
  va_list val;
  va_start(val, fmt);
  return myvfprintf(stdout, fmt, val);
}

int
main(int ac, char **av)
{
  signal(SIGSEGV, exit);
#ifdef SIGBUS
  signal(SIGBUS,  exit);
#endif

  myprintf("%s%cs all right, then\n", "that", '\'');
  exit(0);
}
EOCP
set try
if eval $compile && $run ./try 2>&1 >/dev/null; then
	case "`$run ./try`" in
	"that's all right, then")
		okay=yes
		;;
	esac
fi
case "$okay" in
yes)	echo "It seems that you don't need va_copy()." >&4
	need_va_copy="$undef"
	;;
*)	echo "It seems that va_copy() or similar will be needed." >&4
	need_va_copy="$define"
	;;
esac
$rm_try

: see what type is used for size_t
rp="What is the type used for the length parameter for string functions?"
set size_t sizetype 'unsigned int' stdio.h sys/types.h
eval $typedef_ask

: check for type of arguments to gethostbyaddr.
if test "X$netdb_host_type" = X -o "X$netdb_hlen_type" = X; then
	case "$d_gethbyaddr" in
	$define)
		$cat <<EOM

Checking to see what type of arguments are accepted by gethostbyaddr().
EOM
		hdrs="$define sys/types.h
			$d_socket sys/socket.h
			$i_niin netinet/in.h
			$i_netdb netdb.h
			$i_unistd unistd.h"
		: The first arg can 'char *' or 'void *'
		: The second arg is some of integral type
		for xxx in in_addr_t 'const void *' 'const char *' 'void *' 'char *'; do
			for yyy in size_t long int; do
				case "$netdb_host_type" in
				'')	try="$extern_C struct hostent *gethostbyaddr($xxx, $yyy, int);"
					if ./protochk "$try" $hdrs; then
						echo "Your system accepts $xxx for the first arg."
						echo "...and $yyy for the second arg."
						netdb_host_type="$xxx"
						netdb_hlen_type="$yyy"
					fi
					;;
				esac
			done
		done
		: In case none of those worked, prompt the user.
		case "$netdb_host_type" in
		'')	rp='What is the type for the 1st argument to gethostbyaddr?'
			dflt='char *'
			. ./myread
			netdb_host_type=$ans
			rp='What is the type for the 2nd argument to gethostbyaddr?'
			dflt="$sizetype"
			. ./myread
			netdb_hlen_type=$ans
			;;
		esac
		;;
	*)	: no gethostbyaddr, so pick harmless defaults
		netdb_host_type='char *'
		netdb_hlen_type="$sizetype"
		;;
	esac
	# Remove the "const" if needed. -- but then we'll have a
	# prototype clash!
	# netdb_host_type=`echo "$netdb_host_type" | sed 's/^const //'`
fi

: check for type of argument to gethostbyname.
if test "X$netdb_name_type" = X ; then
	case "$d_gethbyname" in
	$define)
		$cat <<EOM

Checking to see what type of argument is accepted by gethostbyname().
EOM
		hdrs="$define sys/types.h
			$d_socket sys/socket.h
			$i_niin netinet/in.h
			$i_netdb netdb.h
			$i_unistd unistd.h"
		for xxx in "const char *" "char *"; do
			case "$netdb_name_type" in
			'')	try="$extern_C struct hostent *gethostbyname($xxx);"
				if ./protochk "$try" $hdrs; then
					echo "Your system accepts $xxx."
					netdb_name_type="$xxx"
				fi
				;;
			esac
		done
		: In case none of those worked, prompt the user.
		case "$netdb_name_type" in
		'')	rp='What is the type for the 1st argument to gethostbyname?'
			dflt='char *'
			. ./myread
			netdb_name_type=$ans
			;;
		esac
		;;
	*)	: no gethostbyname, so pick harmless default
		netdb_name_type='char *'
		;;
	esac
fi

: check for type of 1st argument to getnetbyaddr.
if test "X$netdb_net_type" = X ; then
	case "$d_getnbyaddr" in
	$define)
		$cat <<EOM

Checking to see what type of 1st argument is accepted by getnetbyaddr().
EOM
		hdrs="$define sys/types.h
			$d_socket sys/socket.h
			$i_niin netinet/in.h
			$i_netdb netdb.h
			$i_unistd unistd.h"
		for xxx in in_addr_t "unsigned long" long "unsigned int" int; do
			case "$netdb_net_type" in
			'')	try="$extern_C struct netent *getnetbyaddr($xxx, int);"
				if ./protochk "$try" $hdrs; then
					echo "Your system accepts $xxx."
					netdb_net_type="$xxx"
				fi
				;;
			esac
		done
		: In case none of those worked, prompt the user.
		case "$netdb_net_type" in
		'')	rp='What is the type for the 1st argument to getnetbyaddr?'
			dflt='long'
			. ./myread
			netdb_net_type=$ans
			;;
		esac
		;;
	*)	: no getnetbyaddr, so pick harmless default
		netdb_net_type='long'
		;;
	esac
fi
: locate the preferred pager for this system
fn=f/
case "$pager" in
'')
	dflt=''
	case "$pg" in
	/*) dflt=$pg;;
	[a-zA-Z]:/*) dflt=$pg;;
	esac
	case "$more" in
	/*) dflt=$more;;
	[a-zA-Z]:/*) dflt=$more;;
	esac
	case "$less" in
	/*) dflt=$less;;
	[a-zA-Z]:/*) dflt=$less;;
	esac
	case "$dflt" in
	'') dflt=/usr/ucb/more;;
	esac
	;;
*)	dflt="$pager"
	;;
esac
fn="f/($dflt)"
echo " "
rp='What pager is used on your system?'
. ./getfile
pager="$ans"

: see if ar generates random libraries by itself
echo " "
echo "Checking how to generate random libraries on your machine..." >&4
echo 'extern int bar2(); int bar1() { return bar2(); }' > bar1.c
echo 'int bar2() { return 2; }' > bar2.c
$cat > foo.c <<EOP
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <stdio.h>
extern int bar1();
int main() { printf("%d\n", bar1()); exit(0); }
EOP
$cc $ccflags -c bar1.c >/dev/null 2>&1
$cc $ccflags -c bar2.c >/dev/null 2>&1
$cc $ccflags -c foo.c >/dev/null 2>&1
$ar rc bar$_a bar2$_o bar1$_o >/dev/null 2>&1
if $cc -o foobar $ccflags $ldflags foo$_o bar$_a $libs > /dev/null 2>&1 &&
	$run ./foobar >/dev/null 2>&1; then
	echo "$ar appears to generate random libraries itself."
	orderlib=false
	if [ "X$ranlib" = "X" ]; then
	    ranlib=":"
	fi
elif $ar s bar$_a >/dev/null 2>&1 &&
	$cc -o foobar $ccflags $ldflags foo$_o bar$_a $libs > /dev/null 2>&1 &&
	$run ./foobar >/dev/null 2>&1; then
		echo "a table of contents needs to be added with '$ar s'."
		orderlib=false
		ranlib="$ar s"
elif $ar ts bar$_a >/dev/null 2>&1 &&
	$cc -o foobar $ccflags $ldflags foo$_o bar$_a $libs > /dev/null 2>&1 &&
	$run ./foobar >/dev/null 2>&1; then
		echo "a table of contents needs to be added with '$ar ts'."
		orderlib=false
		ranlib="$ar ts"
else
	case "$ranlib" in
	:) ranlib='';;
	'')
		ranlib=`./loc ranlib X /usr/bin /bin /usr/local/bin`
		$test -f $ranlib || ranlib=''
		;;
	esac
	if $test -n "$ranlib"; then
		echo "your system has '$ranlib'; we'll use that."
		orderlib=false
	else
		echo "your system doesn't seem to support random libraries"
		echo "so we'll use lorder and tsort to order the libraries."
		orderlib=true
		ranlib=":"
	fi
fi
$rm -f foo* bar*

: Check the max offset that gmtime and localtime accept
echo "Checking max offsets that gmtime () accepts"

case "$sGMTIME_min/$sGMTIME_max" in
    0/0|/)
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
#include <time.h>

int i;
struct tm *tmp;
time_t pt;

void gm_check (time_t t, int min_year, int max_year)
{
    tmp = gmtime (&t);
    if ( tmp == NULL ||
	/* Check tm_year overflow */
	 tmp->tm_year < min_year || tmp->tm_year > max_year)
	tmp = NULL;
    else
	pt = t;
    } /* gm_check */

int check_max ()
{
    tmp = NULL;
    pt  = 0;
#ifdef MAXLONG
    gm_check (MAXLONG, 69, 0x7fffffff);
#endif
    if (tmp == NULL || tmp->tm_year < 0) {
	for (i = 63; i >= 0; i--) {
	    time_t x = pt | ((time_t)1 << i);
	    if (x < 0 || x < pt) continue;
	    gm_check (x, 69, 0x7fffffff);
	    }
	}
    printf ("sGMTIME_max=%ld\n", pt);
    return (0);
    } /* check_max */

int check_min ()
{
    tmp = NULL;
    pt  = 0;
#ifdef MINLONG
    gm_check (MINLONG, -1900, 70);
#endif
    if (tmp == NULL) {
	for (i = 36; i >= 0; i--) {
	    time_t x = pt - ((time_t)1 << i);
	    if (x > 0) continue;
	    gm_check (x, -1900, 70);
	    }
	}
    printf ("sGMTIME_min=%ld\n", pt);
    return (0);
    } /* check_min */

int main (int argc, char *argv[])
{
    /* fprintf (stderr, "Sizeof time_t = %ld\n", sizeof (time_t)); */
    check_max ();
    check_min ();
    return (0);
    } /* main */
EOCP
	set try
	if eval $compile; then
	    eval `$run ./try 2>/dev/null`
	else
	    echo "Cannot determine sGMTIME_max and sGMTIME_min." >&4
	    fi
	$rm_try
	;;
    esac

echo "Checking max offsets that localtime () accepts"

case "$sLOCALTIME_min/$sLOCALTIME_max" in
    0/0|/)
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
#include <time.h>

int i;
struct tm *tmp;
time_t pt;

void local_check (time_t t, int min_year, int max_year)
{
    if (sizeof (time_t) > 4 && t > 0x7ffffffffffff000LL)
	tmp = NULL;
    else
	tmp = localtime (&t);
    if ( tmp == NULL ||
	/* Check tm_year overflow */
	 tmp->tm_year < min_year || tmp->tm_year > max_year)
	tmp = NULL;
    else
	pt = t;
    } /* local_check */

int check_max ()
{
    tmp = NULL;
    pt  = 0;
#ifdef MAXLONG
    local_check (MAXLONG, 69, 0x7fffffff);
#endif
    if (tmp == NULL || tmp->tm_year < 0) {
	for (i = 63; i >= 0; i--) {
	    time_t x = pt | ((time_t)1 << i);
	    if (x < 0 || x < pt) continue;
	    local_check (x, 69, 0x7fffffff);
	    }
	}
    printf ("sLOCALTIME_max=%ld\n", pt);
    return (0);
   } /* check_max */

int check_min ()
{
    tmp = NULL;
    pt  = 0;
#ifdef MINLONG
    local_check (MINLONG, -1900, 70);
#endif
    if (tmp == NULL) {
	for (i = 36; i >= 0; i--) {
	    time_t x = pt - ((time_t)1 << i);
	    if (x > 0) continue;
	    local_check (x, -1900, 70);
	    }
	}
    printf ("sLOCALTIME_min=%ld\n", pt);
    return (0);
    } /* check_min */

int main (int argc, char *argv[])
{
    check_max ();
    check_min ();
    return (0);
    } /* main */
EOCP
	set try
	if eval $compile; then
	    eval `$run ./try 2>/dev/null`
	else
	    echo "Cannot determine sLOCALTIME_max and sLOCALTIME_min." >&4
	    fi
	$rm_try
	;;
    esac

: check for type of arguments to select.
case "$selecttype" in
'') case "$d_select" in
	$define)
		echo " "
		$cat <<EOM
Checking to see what type of arguments are accepted by select().
EOM
		hdrs="$define sys/types.h
			$i_systime sys/time.h
			$i_sysselct sys/select.h
			$d_socket sys/socket.h"
		: The first arg can be int, unsigned, or size_t
		: The last arg may or may not be 'const'
		val=''
		: void pointer has been seen but using that
		: breaks the selectminbits test
		for xxx in 'fd_set *' 'int *'; do
			for nfd in 'int' 'size_t' 'unsigned long' 'unsigned' ; do
				for tmo in 'struct timeval *' 'const struct timeval *'; do
					case "$val" in
					'')	try="$extern_C int select _(($nfd, $xxx, $xxx, $xxx, $tmo));"
						if ./protochk "$try" $hdrs; then
							echo "Your system accepts $xxx."
							val="$xxx"
						fi
						;;
					esac
				done
			done
		done
		case "$val" in
		'')	rp='What is the type for the 2nd, 3rd, and 4th arguments to select?'
			case "$d_fd_set" in
				$define) dflt="fd_set *" ;;
				*)		dflt="int *" ;;
			esac
			. ./myread
			val=$ans
			;;
		esac
		selecttype="$val"
		;;
	*)	: no select, so pick a harmless default
		selecttype='int *'
		;;
	esac
	;;
esac

: check for the select 'width'
case "$selectminbits" in
'') safebits=`expr $ptrsize \* 8`
    case "$d_select" in
	$define)
		$cat <<EOM

Checking to see on how many bits at a time your select() operates...
EOM
		$cat >try.c <<EOCP
#include <sys/types.h>
#$i_time I_TIME
#$i_systime I_SYS_TIME
#$i_systimek I_SYS_TIME_KERNEL
#ifdef I_TIME
#   include <time.h>
#endif
#ifdef I_SYS_TIME
#   ifdef I_SYS_TIME_KERNEL
#	define KERNEL
#   endif
#   include <sys/time.h>
#   ifdef I_SYS_TIME_KERNEL
#	undef KERNEL
#   endif
#endif
#$i_sysselct I_SYS_SELECT
#ifdef I_SYS_SELECT
#include <sys/select.h>
#endif
#$d_socket HAS_SOCKET
#ifdef HAS_SOCKET
#   include <sys/socket.h> /* Might include <sys/bsdtypes.h> */
#endif
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
$selecttype b;
#define S sizeof(*(b))
#define MINBITS	64
#define NBYTES (S * 8 > MINBITS ? S : MINBITS/8)
#define NBITS  (NBYTES * 8)
int main() {
    char *s = (char *)malloc(NBYTES);
    struct timeval t;
    int i;
    FILE* fp;
    int fd;

    if (!s)
	exit(1);
    fclose(stdin);
    fp = fopen("try.c", "r");
    if (fp == 0)
      exit(2);
    fd = fileno(fp);
    if (fd < 0)
      exit(3);
    b = ($selecttype)s;
    for (i = 0; i < NBITS; i++)
	FD_SET(i, b);
    t.tv_sec  = 0;
    t.tv_usec = 0;
    select(fd + 1, b, 0, 0, &t);
    for (i = NBITS - 1; i > fd && FD_ISSET(i, b); i--);
    free(s);
    printf("%d\n", i + 1);
    return 0;
}
EOCP
		set try
		if eval $compile_ok; then
			selectminbits=`$run ./try 2>/dev/null`
			case "$selectminbits" in
			'')	cat >&4 <<EOM
Cannot figure out on how many bits at a time your select() operates.
I'll play safe and guess it is $safebits bits.
EOM
				selectminbits=$safebits
				bits="$safebits bits"
				;;
			1)	bits="1 bit" ;;
			*)	bits="$selectminbits bits" ;;
			esac
			echo "Your select() operates on $bits at a time." >&4
		else
			rp='What is the minimum number of bits your select() operates on?'
			case "$byteorder" in
			12345678)	dflt=64 ;;
			1234)		dflt=32 ;;
			*)		dflt=1	;;
			esac
			. ./myread
			val=$ans
			selectminbits="$val"
		fi
		$rm_try
		;;
	*)	: no select, so pick a harmless default
		selectminbits=$safebits
		;;
	esac
	;;
esac

: Trace out the files included by signal.h, then look for SIGxxx names.
case "$sig_num_init" in
'')
if [ "X$fieldn" = X ]; then
	: Just make some guesses.  We check them later.
	xxx="$sysroot/usr/include/signal.h $sysroot/usr/include/sys/signal.h"
else
	xxx=`echo '#include <signal.h>' |
	$cppstdin $cppminus $cppflags 2>/dev/null |
	$grep '^[ 	]*#.*include' |
	$awk "{print \\$$fieldn}" | $sed 's!"!!g' |\
		$sed 's!\\\\\\\\!/!g' | $sort | $uniq`
fi
xxxfiles=''
for xx in $xxx /dev/null ; do
	$test -f "$xx" && xxxfiles="$xxxfiles $xx"
done
case "$xxxfiles" in
'')	xxxfiles=`./findhdr signal.h` ;;
esac
xxx=`awk '
$1 ~ /^#define$/ && $2 ~ /^SIG[A-Z0-9]*$/ && $2 !~ /SIGARRAYSIZE/ && $2 !~ /SIGSTKSIZE/ && $2 !~ /SIGSTKSZ/ && $3 !~ /void/ {
	print substr($2, 4, 20)
}
$1 == "#" && $2 ~ /^define$/ && $3 ~ /^SIG[A-Z0-9]*$/ && $3 !~ /SIGARRAYSIZE/ && $4 !~ /void/ {
	print substr($3, 4, 20)
}' $xxxfiles`
: Append some common names just in case the awk scan failed.
xxx="$xxx ABRT ALRM BUS CANCEL CHLD CLD CONT DIL EMT FPE"
xxx="$xxx FREEZE HUP ILL INT IO IOT KILL LOST LWP PHONE"
xxx="$xxx PIPE POLL PROF PWR QUIT RTMAX RTMIN SEGV STKFLT STOP"
xxx="$xxx SYS TERM THAW TRAP TSTP TTIN TTOU URG USR1 USR2"
xxx="$xxx USR3 USR4 VTALRM WAITING WINCH WIND WINDOW XCPU XFSZ"

: generate a few handy files for later
$cat > signal.c <<EOCP
#include <sys/types.h>
#include <signal.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <stdio.h>
int main() {

/* Strange style to avoid deeply-nested #if/#else/#endif */
#ifndef NSIG
#  ifdef _NSIG
#    define NSIG (_NSIG)
#  endif
#endif

#ifndef NSIG
#  ifdef SIGMAX
#    define NSIG (SIGMAX+1)
#  endif
#endif

#ifndef NSIG
#  ifdef SIG_MAX
#    define NSIG (SIG_MAX+1)
#  endif
#endif

#ifndef NSIG
#  ifdef _SIG_MAX
#    define NSIG (_SIG_MAX+1)
#  endif
#endif

#ifndef NSIG
#  ifdef MAXSIG
#    define NSIG (MAXSIG+1)
#  endif
#endif

#ifndef NSIG
#  ifdef MAX_SIG
#    define NSIG (MAX_SIG+1)
#  endif
#endif

#ifndef NSIG
#  ifdef SIGARRAYSIZE
#    define NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
#  endif
#endif

#ifndef NSIG
#  ifdef _sys_nsig
#    define NSIG (_sys_nsig) /* Solaris 2.5 */
#  endif
#endif

/* Default to some arbitrary number that's big enough to get most
   of the common signals.
*/
#ifndef NSIG
#    define NSIG 50
#endif

printf("NSIG %d\n", NSIG);

#ifndef JUST_NSIG

EOCP

echo $xxx | $tr ' ' $trnl | $sort | $uniq | $awk '
{
	printf "#ifdef SIG"; printf $1; printf "\n"
	printf "printf(\""; printf $1; printf " %%d\\n\",SIG";
	printf $1; printf ");\n"
	printf "#endif\n"
}
END {
	printf "#endif /* JUST_NSIG */\n";
	printf "exit(0);\n}\n";
}
' >>signal.c
$cat >signal.awk <<'EOP'
BEGIN { ndups = 0 }
$1 ~ /^NSIG$/ { nsig = $2 }
($1 !~ /^NSIG$/) && (NF == 2) && ($2 ~ /^[0-9][0-9]*$/) {
    if ($2 > maxsig) { maxsig = $2 }
    if (sig_name[$2]) {
	dup_name[ndups] = $1
	dup_num[ndups] = $2
	ndups++
    }
    else {
	sig_name[$2] = $1
	sig_num[$2] = $2
    }
}
END {
    if (nsig == 0) {
    	nsig = maxsig + 1
    }
    printf("NSIG %d\n", nsig);
    for (n = 1; n < nsig; n++) {
 	if (sig_name[n]) {
 	    printf("%s %d\n", sig_name[n], sig_num[n])
	}
 	else {
 	    printf("NUM%d %d\n", n, n)
 	}
    }
    for (n = 0; n < ndups; n++) {
 	printf("%s %d\n", dup_name[n], dup_num[n])
    }
}
EOP
$cat >signal_cmd <<EOS
$startsh
if $test -s signal.lst; then
    echo "Using your existing signal.lst file"
	exit 0
fi
xxx="$xxx"
EOS
$cat >>signal_cmd <<'EOS'

set signal
if eval $compile_ok; then
	$run ./signal$_exe | ($sort -n -k 2 2>/dev/null || $sort -n +1) |\
		$uniq | $awk -f signal.awk >signal.lst
else
	echo "(I can't seem be able to compile the whole test program)" >&4
	echo "(I'll try it in little pieces.)" >&4
	set signal -DJUST_NSIG
	if eval $compile_ok; then
		$run ./signal$_exe > signal.nsg
		$cat signal.nsg
	else
		echo "I can't seem to figure out how many signals you have." >&4
		echo "Guessing 50." >&4
		echo 'NSIG 50' > signal.nsg
	fi
	: Now look at all the signal names, one at a time.
	for xx in `echo $xxx | $tr ' ' $trnl | $sort | $uniq`; do
		$cat > signal.c <<EOCP
#include <sys/types.h>
#include <signal.h>
#include <stdio.h>
int main() {
printf("$xx %ld\n", (long) SIG${xx});
return 0;
}
EOCP
		set signal
		if eval $compile; then
			echo "SIG${xx} found."
			$run ./signal$_exe  >> signal.ls1
		else
			echo "SIG${xx} NOT found."
		fi
	done
	if $test -s signal.ls1; then
		$cat signal.nsg signal.ls1 |
			$sort -n | $uniq | $awk -f signal.awk >signal.lst
	fi

fi
if $test -s signal.lst; then
	:
else
	echo "(AAK! I can't compile the test programs -- Guessing)" >&4
	echo 'kill -l' >signal
	set X `csh -f <signal`
	$rm -f signal
	shift
	case $# in
	0) set HUP INT QUIT ILL TRAP ABRT EMT FPE KILL BUS SEGV SYS PIPE ALRM TERM;;
	esac
	echo $@ | $tr ' ' $trnl | \
 	    $awk '{ printf "%s %d\n", $1, ++s; }
 		  END { printf "NSIG %d\n", ++s }' >signal.lst
fi
$rm -f signal.c signal$_exe signal$_o signal.nsg signal.ls1
EOS
chmod a+x signal_cmd
$eunicefix signal_cmd
;;
esac

: generate list of signal names
case "$sig_num_init" in
'')
echo " "
case "$sig_name_init" in
'') doinit=yes ;;
*)  case "$sig_num_init" in
    ''|*,*) doinit=yes ;;
    esac ;;
esac
case "$doinit" in
yes)
	echo "Generating a list of signal names and numbers..." >&4
	. ./signal_cmd
	sig_count=`$awk '/^NSIG/ { printf "%d", $2 }' signal.lst`
	sig_name=`$awk 'BEGIN { printf "ZERO " }
			!/^NSIG/ { printf "%s ", $1 }' signal.lst`
	sig_num=`$awk  'BEGIN { printf "0 " }
			!/^NSIG/ { printf "%d ", $2 }' signal.lst`
	sig_name_init=`$awk 'BEGIN	{ printf "\"ZERO\", " }
			     !/^NSIG/	{ printf "\"%s\", ", $1 }
			     END	{ printf "0\n" }' signal.lst`
	sig_num_init=`$awk  'BEGIN	{ printf "0, " }
			     !/^NSIG/	{ printf "%d, ", $2}
			     END	{ printf "0\n"}' signal.lst`
	;;
esac
echo "The following $sig_count signals are available:"
echo " "
echo $sig_name | $awk \
'BEGIN { linelen = 0 }
{
	for (i = 1; i <= NF; i++) {
		name = "SIG" $i " "
		linelen = linelen + length(name)
		if (linelen > 70) {
			printf "\n"
			linelen = length(name)
		}
		printf "%s", name
	}
	printf "\n"
}'
sig_size=`echo $sig_name | awk '{print NF}'`
$rm -f signal signal.c signal.awk signal.lst signal_cmd
;;
esac

: Check size of size
echo " "
case "$sizetype" in
*_t) zzz="$sizetype"	;;
*)   zzz="filesize"	;;
esac
echo "Checking the size of $zzz..." >&4
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
    printf("%d\n", (int)sizeof($sizetype));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	yyy=`$run ./try`
	case "$yyy" in
	'')	sizesize=4
		echo "(I can't execute the test program--guessing $sizesize.)" >&4
		;;
	*)	sizesize=$yyy
		echo "Your $zzz size is $sizesize bytes."
		;;
	esac
else
	sizesize=4
	echo "(I can't compile the test program--guessing $sizesize.)" >&4
fi

: check for socklen_t
echo " "
echo "Checking to see if you have socklen_t..." >&4
$cat >try.c <<EOCP
#include <sys/types.h>
#$d_socket HAS_SOCKET
#ifdef HAS_SOCKET
#include <sys/socket.h>
#endif
int main() { socklen_t x = 16; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have socklen_t."
else
	val="$undef"
	echo "You do not have socklen_t."
	case "$sizetype" in
	size_t) echo "(You do have size_t, that might work. Some people are happy with just an int.)" ;;
	esac
fi
$rm_try
set d_socklen_t
eval $setvar

: see if this is a socks.h system
set socks.h i_socks
eval $inhdr

: check for type of the size argument to socket calls
case "$d_socket" in
"$define")
	$cat <<EOM

Checking to see what type is the last argument of accept().
EOM
	yyy=''
	case "$d_socklen_t" in
	"$define") yyy="$yyy socklen_t"
	esac
	yyy="$yyy $sizetype int long unsigned"
	for xxx in $yyy; do
		case "$socksizetype" in
		'')	try="$extern_C int accept(int, struct sockaddr *, $xxx *);"
			case "$usesocks" in
			"$define")
				if ./protochk "$try" $i_systypes sys/types.h $d_socket sys/socket.h literal '#define INCLUDE_PROTOTYPES' $i_socks socks.h.; then
					echo "Your system accepts '$xxx *' for the last argument of accept()."
					socksizetype="$xxx"
				fi
				;;
			*)	if ./protochk "$try"  $i_systypes sys/types.h $d_socket sys/socket.h; then
					echo "Your system accepts '$xxx *' for the last argument of accept()."
					socksizetype="$xxx"
				fi
				;;
			esac
			;;
		esac
	done
: In case none of those worked, prompt the user.
	case "$socksizetype" in
	'')	rp='What is the type for socket address structure sizes?'
		dflt='int'
		. ./myread
		socksizetype=$ans
		;;
	esac
	;;
*)	: no sockets, so pick relatively harmless default
	socksizetype='int'
	;;
esac

: see what type is used for signed size_t
set ssize_t ssizetype int stdio.h sys/types.h
eval $typedef
dflt="$ssizetype"
$cat > try.c <<EOM
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#include <sys/types.h>
#define Size_t $sizetype
#define SSize_t $dflt
int main()
{
	if (sizeof(Size_t) == sizeof(SSize_t))
		printf("$dflt\n");
	else if (sizeof(Size_t) == sizeof(int))
		printf("int\n");
	else
		printf("long\n");
	exit(0);
}
EOM
echo " "
set try
if eval $compile_ok && $run ./try > /dev/null; then
	ssizetype=`$run ./try`
	echo "I'll be using $ssizetype for functions returning a byte count." >&4
else
	$cat >&4 <<EOM
Help! I can't compile and run the ssize_t test program: please enlighten me!
(This is probably a misconfiguration in your system or libraries, and
you really ought to fix it.  Still, I'll try anyway.)

I need a type that is the same size as $sizetype, but is guaranteed to
be signed.  Common values are ssize_t, int and long.

EOM
	rp="What signed type is the same size as $sizetype?"
	. ./myread
	ssizetype="$ans"
fi
$rm_try

: Check the size of st_dev
$echo " "
$echo "Checking the size of st_dev..." >&4
$cat > try.c <<EOCP
#include <sys/stat.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
    struct stat st;
    printf("%d\n", (int)sizeof(st.st_dev));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	val=`$run ./try`
	case "$val" in
	'')	st_dev_size=4
		$echo "(I can't execute the test program--guessing $st_dev_size.)" >&4
		;;
	*)	st_dev_size=$val
		$echo "Your st_dev is $st_dev_size bytes long."
		;;
	esac
else
	st_dev_size=4
	$echo "(I can't compile the test program--guessing $st_dev_size.)" >&4
fi
$rm_try

: Check if st_dev is signed
$echo " "
$echo "Checking the sign of st_dev..." >&4
$cat > try.c <<EOCP
#include <sys/stat.h>
#include <stdio.h>
int main() {
	struct stat foo;
        foo.st_dev = -1;
	if (foo.st_dev < 0)
		printf("-1\n");
	else
		printf("1\n");
}
EOCP
set try
if eval $compile; then
	val=`$run ./try`
	case "$val" in
	'')	st_dev_sign=1
		$echo "(I can't execute the test program--guessing unsigned.)" >&4
		;;
	*)	st_dev_sign=$val
		case "$st_dev_sign" in
		 1) $echo "Your st_dev is unsigned." ;;
		-1) $echo "Your st_dev is signed."   ;;
		esac
		;;
	esac
else
	st_dev_sign=1
	$echo "(I can't compile the test program--guessing unsigned.)" >&4
fi
$rm_try

: Check the size of st_ino
$echo " "
$echo "Checking the size of st_ino..." >&4
$cat > try.c <<EOCP
#include <sys/stat.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
    struct stat st;
    printf("%d\n", (int)sizeof(st.st_ino));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	val=`$run ./try`
	case "$val" in
	'')	st_ino_size=4
		$echo "(I can't execute the test program--guessing $st_ino_size.)" >&4
		;;
	*)	st_ino_size=$val
		$echo "Your st_ino is $st_ino_size bytes long."
		;;
	esac
else
	st_ino_size=4
	$echo "(I can't compile the test program--guessing $st_ino_size.)" >&4
fi
$rm_try

: Check if st_ino is signed
$echo " "
$echo "Checking the sign of st_ino..." >&4
$cat > try.c <<EOCP
#include <sys/stat.h>
#include <stdio.h>
int main() {
	struct stat foo;
        foo.st_ino = -1;
	if (foo.st_ino < 0)
		printf("-1\n");
	else
		printf("1\n");
}
EOCP
set try
if eval $compile; then
	val=`$run ./try`
	case "$val" in
	'')	st_ino_sign=1
		$echo "(I can't execute the test program--guessing unsigned.)" >&4
		;;
	*)	st_ino_sign=$val
		case "$st_ino_sign" in
		 1) $echo "Your st_ino is unsigned." ;;
		-1) $echo "Your st_ino is signed."   ;;
		esac
		;;
	esac
else
	st_ino_sign=1
	$echo "(I can't compile the test program--guessing unsigned.)" >&4
fi
$rm_try

: see what type of char stdio uses.
echo " "
echo '#include <stdio.h>' | $cppstdin $cppminus > stdioh
if $contains 'unsigned.*char.*_ptr;' stdioh >/dev/null 2>&1 ; then
	echo "Your stdio uses unsigned chars." >&4
	stdchar="unsigned char"
else
	echo "Your stdio uses signed chars." >&4
	stdchar="char"
fi
$rm -f stdioh

: Check size of UID
echo " "
case "$uidtype" in
*_t) zzz="$uidtype"	;;
*)   zzz="uid"		;;
esac
echo "Checking the size of $zzz..." >&4
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
#$i_stdlib I_STDLIB
#ifdef I_STDLIB
#include <stdlib.h>
#endif
int main() {
    printf("%d\n", (int)sizeof($uidtype));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	yyy=`$run ./try`
	case "$yyy" in
	'')	uidsize=4
		echo "(I can't execute the test program--guessing $uidsize.)" >&4
		;;
	*)	uidsize=$yyy
		echo "Your $zzz is $uidsize bytes long."
		;;
	esac
else
	uidsize=4
	echo "(I can't compile the test program--guessing $uidsize.)" >&4
fi

: Check if UID is signed
echo " "
case "$uidtype" in
*_t) zzz="$uidtype"	;;
*)   zzz="uid"		;;
esac
echo "Checking the sign of $zzz..." >&4
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
	$uidtype foo = -1;
	if (foo < 0)
		printf("-1\n");
	else
		printf("1\n");
}
EOCP
set try
if eval $compile; then
	yyy=`$run ./try`
	case "$yyy" in
	'')	uidsign=1
		echo "(I can't execute the test program--guessing unsigned.)" >&4
		;;
	*)	uidsign=$yyy
		case "$uidsign" in
		 1) echo "Your $zzz is unsigned." ;;
		-1) echo "Your $zzz is signed."   ;;
		esac
		;;
	esac
else
	uidsign=1
	echo "(I can't compile the test program--guessing unsigned.)" >&4
fi

: Check format string for UID
echo " "
$echo "Checking the format string to be used for uids..." >&4

case "$uidsign" in
-1)	if $test X"$uidsize" = X"$ivsize"; then
		uidformat="$ivdformat"
	else
		if $test X"$uidsize" = X"$longsize"; then
			uidformat='"ld"'
		else
			if $test X"$uidsize" = X"$intsize"; then
				uidformat='"d"'
			else
				if $test X"$uidsize" = X"$shortsize"; then
					uidformat='"hd"'
				fi
			fi
		fi
	fi
	;;
*)	if $test X"$uidsize" = X"$uvsize"; then
		uidformat="$uvuformat"
	else
		if $test X"$uidsize" = X"$longsize"; then
			uidformat='"lu"'
		else
			if $test X"$uidsize" = X"$intsize"; then
				uidformat='"u"'
			else
				if $test X"$uidsize" = X"$shortsize"; then
					uidformat='"hu"'
				fi
			fi
		fi
	fi
	;;
esac

: Ask about strict by default.
case "$usedefaultstrict" in
    $define|true|[Yy]*)
       dflt="y"
       ;;
    *)
       dflt="n"
       ;;
    esac

cat <<EOM

EXPERIMENTAL: Perl can now be built with strict on by default when not
invoked with -e or -E. This is a diagnostic tool for development.

Unless you are familiar with this feature, you should probably answer 'no'.

EOM

rp='Would you like to build perl with strict enabled by default?'
. ./myread
case "$ans" in
y|Y) val="$define" ;;
*)   val="$undef"  ;;
esac
set usedefaultstrict
eval $setvar

: Determine if we can use sysctl with KERN_PROC_PATHNAME to find executing program
echo " "
echo "Determining whether we can use sysctl with KERN_PROC_PATHNAME to find executing program..." >&4
$cat >try.c <<'EOM'
/* Intentionally a long probe as I'd like to sanity check that the exact
   approach is going to work, as thinking it will work, but only having it
   part working at runtime is worse than not having it.  */

#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/param.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

int
main(int argc, char **argv) {
    char *buffer;
    char *argv_leaf = strrchr(argv[0], '/');
    char *buffer_leaf;
    size_t size = 0;
    int mib[4];

    mib[0] = CTL_KERN;
    mib[1] = KERN_PROC;
    mib[2] = KERN_PROC_PATHNAME;
    mib[3] = -1;

    if (!argv_leaf) {
	fprintf(stderr, "Can't locate / in '%s'\n", argv[0]);
	return 1;
    }

    if (sysctl(mib, 4, NULL, &size, NULL, 0)) {
	perror("sysctl");
	return 2;
    }

    if (size < strlen(argv_leaf) + 1) {
	fprintf(stderr, "size %lu is too short for a path\n",
		(unsigned long) size);
	return 3;
    }

    if (size > MAXPATHLEN * MAXPATHLEN) {
	fprintf(stderr, "size %lu is too long for a path\n",
		(unsigned long) size);
	return 4;
    }

    buffer = (char *)malloc(size);
    if (!buffer) {
	perror("malloc");
	return 5;
    }

    if (sysctl(mib, 4, buffer, &size, NULL, 0)) {
	perror("sysctl");
	return 6;
    }

    if (strlen(buffer) + 1 != size) {
	fprintf(stderr, "size != strlen(buffer) + 1 (%lu != %lu)\n",
		(unsigned long)size, (unsigned long)strlen(buffer) + 1);
        return 7;
    }


    if (*buffer != '/') {
	fprintf(stderr, "Not an absolute path: '%s'\n", buffer);
	return 8;
    }

    if (strstr(buffer, "/./")) {
	fprintf(stderr, "Contains /./: '%s'\n", buffer);
	return 9;
    }

    if (strstr(buffer, "/../")) {
	fprintf(stderr, "Contains /../: '%s'\n", buffer);
	return 10;
    }

    buffer_leaf = strrchr(buffer, '/');
    if (strcmp(buffer_leaf, argv_leaf) != 0) {
	fprintf(stderr, "Leafnames differ: '%s' vs '%s'\n", argv[0], buffer);
	return 11;
    }

    free(buffer);

    return 0;
}
EOM

val=$undef
set try
if eval $compile; then
	if $run ./try; then
		echo "You can use sysctl with KERN_PROC_PATHNAME to find the executing program." >&4
		val="$define"
	else
		echo "Nope, sysctl with KERN_PROC_PATHNAME doesn't work here." >&4
		val="$undef"
	fi
else
	echo "I'm unable to compile the test program." >&4
	echo "I'll assume no sysctl with KERN_PROC_PATHNAME here." >&4
	val="$undef"
fi
$rm_try
set usekernprocpathname
eval $setvar

: Determine if we can use _NSGetExecutablePath to find executing program
echo " "
echo "Determining whether we can use _NSGetExecutablePath to find executing program..." >&4
$cat >try.c <<'EOM'
/* Intentionally a long probe as I'd like to sanity check that the exact
   approach is going to work, as thinking it will work, but only having it
   part working at runtime is worse than not having it.  */
#include <mach-o/dyld.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <string.h>

int
main(int argc, char **argv) {
    char buf[1];
    uint32_t size = sizeof(buf);
    int result;
    char *buffer;
    char *tidied;
    char *argv_leaf = strrchr(argv[0], '/');
    char *tidied_leaf;

    if (!argv_leaf) {
	fprintf(stderr, "Can't locate / in '%s'\n", argv[0]);
	return 1;
    }

    _NSGetExecutablePath(buf, &size);
    if (size > MAXPATHLEN * MAXPATHLEN) {
	fprintf(stderr, "_NSGetExecutablePath size %u is too long for a path\n",
		(unsigned int) size);
	return 2;
    }

    buffer = (char *)malloc(size);
    if (!buffer) {
	perror("malloc");
	return 3;
    }

    result = _NSGetExecutablePath(buffer, &size);
    if (result != 0) {
	fprintf(stderr, "_NSGetExecutablePath returned %i for a size of %u\n",
		result, (unsigned int) size);
	return 4;
    }

    tidied = realpath(buffer, NULL);
    if (!tidied) {
	perror("realpath");
	return 5;
    }

    free(buffer);

    if (*tidied != '/') {
	fprintf(stderr, "Not an absolute path: '%s'\n", tidied);
	return 6;
    }

    if (strstr(tidied, "/./")) {
	fprintf(stderr, "Contains /./: '%s'\n", tidied);
	return 7;
    }

    if (strstr(tidied, "/../")) {
	fprintf(stderr, "Contains /../: '%s'\n", tidied);
	return 8;
    }

    tidied_leaf = strrchr(tidied, '/');
    if (strcmp(tidied_leaf, argv_leaf) != 0) {
	fprintf(stderr, "Leafnames differ: '%s' vs '%s'\n", argv[0], tidied);
	return 9;
    }

    free(tidied);

    return 0;
}
EOM

val=$undef
set try
if eval $compile; then
	if $run ./try; then
		echo "You can use _NSGetExecutablePath to find the executing program." >&4
		val="$define"
	else
		echo "Nope, _NSGetExecutablePath doesn't work here." >&4
	fi
else
	echo "I'm unable to compile the test program." >&4
	echo "I'll assume no _NSGetExecutablePath here." >&4
fi
$rm_try
set usensgetexecutablepath
eval $setvar

: Check if site customization support was requested
case "$usesitecustomize" in
    $define|true|[Yy]*)
	usesitecustomize="$define"
	;;
    *)
	usesitecustomize="$undef"
	;;
    esac

: determine compiler compiler
case "$yacc" in
'')
	dflt=yacc;;
*)
	dflt="$yacc";;
esac
echo " "
comp='yacc'
if $test -f "$byacc$_exe"; then
	dflt="$byacc"
	comp="byacc or $comp"
fi
if $test -f "$bison$_exe"; then
	comp="$comp or bison -y"
fi
rp="Which compiler compiler ($comp) shall I use?"
. ./myread
yacc="$ans"
case "$yacc" in
*bis*)
	case "$yacc" in
	*-y*) ;;
	*)
		yacc="$yacc -y"
		echo "(Adding -y option to bison to get yacc-compatible behavior.)"
		;;
	esac
	;;
esac

: see if this is a bfd.h system
set bfd.h i_bfd
eval $inhdr

: see if this is an execinfo.h system
set execinfo.h i_execinfo
eval $inhdr

: see if this is a fenv.h system
set fenv.h i_fenv
eval $inhdr

: see if this is a fp.h system
set fp.h i_fp
eval $inhdr

: see if this is a fp_class.h system
set fp_class.h i_fp_class
eval $inhdr

: see if gdbm.h is available
set gdbm.h t_gdbm
eval $inhdr
case "$t_gdbm" in
$define)
	: see if gdbm_open exists
	set gdbm_open d_gdbm_open
	eval $inlibc
	case "$d_gdbm_open" in
	$undef)
		t_gdbm="$undef"
		echo "We won't be including <gdbm.h>"
		;;
	esac
	;;
esac
val="$t_gdbm"
set i_gdbm
eval $setvar

: see if this is a ieeefp.h system
case "$i_ieeefp" in
'' ) set ieeefp.h i_ieeefp
     eval $inhdr
     ;;
esac

: see if this is a libutil.h system
set libutil.h i_libutil
eval $inhdr

: see if mach cthreads are available
if test "X$usethreads" = "X$define"; then
	set mach/cthreads.h i_machcthr
	eval $inhdr
else
	i_machcthr="$undef"
fi

: see if this is a mntent.h system
set mntent.h i_mntent
eval $inhdr

: see if net/errno.h is available
val=''
set net/errno.h val
eval $inhdr

: Unfortunately, it causes problems on some systems.  Arrgh.
case "$val" in
$define)
	cat > try.c <<'EOM'
#include <stdio.h>
#include <errno.h>
#include <net/errno.h>
int func()
{
	return ENOTSOCK;
}
EOM
	if $cc $ccflags -c try.c >/dev/null 2>&1; then
		echo "We'll be including <net/errno.h>." >&4
	else
		echo "We won't be including <net/errno.h>." >&4
		val="$undef"
	fi
	$rm_try
	;;
esac
set i_neterrno
eval $setvar

: see if netinet/tcp.h is available
set netinet/tcp.h i_netinettcp
eval $inhdr

: see if this is a poll.h system
set poll.h i_poll
eval $inhdr

: see if this is a prot.h system
set prot.h i_prot
eval $inhdr

: Preprocessor symbols
echo " "
$echo "Guessing which symbols your C compiler and preprocessor define..." >&4
$cat <<'EOSH' > Cppsym.know
a29k aarch64 ABI64 aegis AES_SOURCE AIX AIX32 AIX370 AIX41 AIX42
AIX43 aixpc AIX_SOURCE alliant ALL_SOURCE alpha AM29000 am29000
AMD64 amd64 amiga AMIGAOS AMIX ansi ANSI_C_SOURCE apollo arch_ppc
arch_pwr ardent ARM ARM32 atarist att386 att3b
BeOS BIG_ENDIAN BIT_MSF BSD bsd bsd43 bsd4_2 BSD4_3 bsd4_3 bsd4_4
BSDCOMPAT bsdi BSD_4_3 BSD_4_4 BSD_NET2 BSD_TIME BSD_TYPES bull
byteorder byte_order
c cadmus clang clipper CMU COFF COMPILER_VERSION concurrent
convex cpu CRAY cray CRAYMPP ctix CX_UX CYGWIN
DECC DGUX DGUX_SOURCE DJGPP dmert DOLPHIN DPX2 DSO Dynix DynixPTX
ELF encore EPI EXTENSIONS
FAVOR_BSD FILE_OFFSET_BITS FORTIFY_SOURCE FreeBSD
GCC_NEW_VARARGS gcos gcx gimpel GLIBC GLIBC_MINOR GNUC GNUC_MINOR
GNU_LIBRARY GNU_SOURCE GO32 gould GOULD_PN
H3050R H3050RX hbullx20 hcx host_mips hp200 hp300 HP700 hp700
hp800 hp9000 hp9000s200 hp9000s300 hp9000s400
hp9000s700 hp9000s800 hp9k8 hppa hpux HPUX_SOURCE hp_osf
i186 i286 i386 i486 i586 i686 i8086 i80960 i860 I960 IA32 IA64
iAPX286 ibm ibm032 ibmesa IBMR2 ibmrt ILP32 ILP64
INLINE_INTRINSICS INT64 INTEL interdata INTRINSICS is68k itanium
ksr1
LANGUAGE_C LARGEFILE64_SOURCE LARGEFILE_SOURCE LARGE_FILE_API
LFS64_LARGEFILE LFS_LARGEFILE LIBCATAMOUNT Linux LITTLE_ENDIAN
LONG64 LONGDOUBLE LONGLONG LONG_DOUBLE LONG_LONG LP64 luna
luna88k Lynx
M68000 m68k m88100 m88k M88KBCS_TARGET MACH machine MachTen
MATH_HAS_NO_SIDE_EFFECTS mc300 mc500 mc68000 mc68010 mc68020
mc68030 mc68040 mc68060 mc68k mc68k32 mc700 mc88000 mc88100
merlin mert MiNT mips MIPSEB MIPSEL MIPS_FPSET MIPS_ISA MIPS_SIM
MIPS_SZINT MIPS_SZLONG MIPS_SZPTR MODERN_C motorola MSDOS
MTXINU MULTIMAX MVS mvs M_AMD64 M_ARM M_ARMT M_COFF M_I186 M_I286
M_I386 M_I8086 M_I86 M_I86SM M_IA64 M_IX86 M_PPC M_SYS3 M_SYS5
M_SYSIII M_SYSV M_UNIX M_X86 M_XENIX
n16 ncl_el ncl_mr NetBSD news1500 news1700 news1800 news1900
news3700 news700 news800 news900 NeXT NLS nonstopux ns16000
ns32000 ns32016 ns32332 ns32k nsc32000
OCS88 OEMVS OpenBSD os OS2 OS390 osf OSF1 OSF_SOURCE
PARAGON parisc pa_risc PA_RISC1_1 PA_RISC2_0 pc532 pdp11 PGC PIC
plexus PORTAR posix POSIX1B_SOURCE POSIX2_SOURCE POSIX4_SOURCE
POSIX_C_SOURCE POSIX_SOURCE POWER powerpc ppc PROTOTYPES PWB pyr
QK_USER QNX
R3000 REENTRANT RES Rhapsody RISC6000 riscix riscos RT
S390 S390x SA110 SCO scs sequent sgi SGI_SOURCE SH SH3 sinix
SIZE_INT SIZE_LONG SIZE_PTR SOCKETS_SOURCE SOCKET_SOURCE sony
sonyrisc sony_news sparc sparclite sparcv8 sparcv9 spectrum
stardent stdc STDC_EXT stratos sun sun3 sun386 Sun386i svr3 svr4
SVR4_2 SVR4_SOURCE svr5 SX system SYSTYPE_BSD SYSTYPE_BSD43
SYSTYPE_BSD44 SYSTYPE_SVR4 SYSTYPE_SVR5 SYSTYPE_SYSV SYSV SYSV3
SYSV4 SYSV5 sysV68 sysV88
Tek4132 Tek4300 thumb thw_370 thw_intel thw_rs6000 titan TM3200
TM5400 TM5600 tower tower32 tower32_200 tower32_600 tower32_700
tower32_800 tower32_850 tss
u370 u3b u3b2 u3b20 u3b200 u3b20d u3b5 ultrix UMAXV UnicomPBB
UnicomPBD UNICOS UNICOSMK unix UNIX95 UNIX99 unixpc unos USE_BSD
USE_FILE_OFFSET64 USE_GNU USE_ISOC9X USE_LARGEFILE
USE_LARGEFILE64 USE_MISC USE_POSIX USE_POSIX199309
USE_POSIX199506 USE_POSIX2 USE_REENTRANT USE_SVID USE_UNIX98
USE_XOPEN USE_XOPEN_EXTENDED USGr4 USGr4_2 UTek Utek UTS UWIN
uxpm uxps
vax venix VMESA vms
x86_64 xenix Xenix286 XOPEN_SOURCE XOPEN_SOURCE_EXTENDED XPG2
XPG2_EXTENDED XPG3 XPG3_EXTENDED XPG4 XPG4_EXTENDED
z8000 zarch
EOSH
# Maybe put other stuff here too.
./tr '-' '_' <<EOSH >>Cppsym.know
$osname
EOSH
./tr '[a-z]' '[A-Z]' < Cppsym.know > Cppsym.a
./tr '[A-Z]' '[a-z]' < Cppsym.know > Cppsym.b
$cat Cppsym.know > Cppsym.c
$cat Cppsym.a Cppsym.b Cppsym.c | $tr ' ' $trnl | $sort | $uniq > Cppsym.know
$rm -f Cppsym.a Cppsym.b Cppsym.c
cat <<EOSH > Cppsym
$startsh
if $test \$# -gt 0; then
    echo \$* | $tr " " "$trnl" | ./Cppsym.try > Cppsym.got
    if $test -s Cppsym.got; then
	$rm -f Cppsym.got
	exit 0
    fi
    $rm -f Cppsym.got
    exit 1
else
    $tr " " "$trnl" | ./Cppsym.try
    exit 0
fi
EOSH
chmod +x Cppsym
$eunicefix Cppsym
cat <<EOSH > Cppsym.try
$startsh
cat <<'EOCP' > try.c
#include <stdio.h>
#if cpp_stuff == 1
#define STRINGIFY(a)    "a"
#endif
#if cpp_stuff == 42
#define StGiFy(a)  #a
#define STRINGIFY(a)    StGiFy(a)
#endif
#if $cpp_stuff != 1 && $cpp_stuff != 42
#   include "Bletch: How does this C preprocessor stringify macros?"
#endif
int main() {
EOCP
$awk \\
EOSH
cat <<'EOSH' >> Cppsym.try
'length($1) > 0 {
    printf "#ifdef %s\nprintf(\"%s=%%s\\n\", STRINGIFY(%s));\n#endif\n", $1, $1, $1
    printf "#ifdef _%s\nprintf(\"_%s=%%s\\n\", STRINGIFY(_%s));\n#endif\n", $1, $1, $1
    printf "#ifdef __%s\nprintf(\"__%s=%%s\\n\", STRINGIFY(__%s));\n#endif\n", $1, $1, $1
    printf "#ifdef __%s__\nprintf(\"__%s__=%%s\\n\", STRINGIFY(__%s__));\n#endif\n", $1, $1, $1
}' >> try.c
echo 'return 0;}' >> try.c
EOSH
cat <<EOSH >> Cppsym.try
ccflags="$ccflags"
case "$osname-$gccversion" in
irix-) ccflags="\$ccflags -woff 1178" ;;
os2-*) ccflags="\$ccflags -Zlinker /PM:VIO" ;;
esac
$cc -o try -Dcpp_stuff=$cpp_stuff $optimize \$ccflags $ldflags try.c $libs 2>/dev/null && $run ./try | $sed 's/ /\\\\ /g'
EOSH
chmod +x Cppsym.try
$eunicefix Cppsym.try
./Cppsym < Cppsym.know | $sort | $uniq > Cppsym.true
: Add in any Linux cpp "predefined macros":
case "$osname::$gccversion" in
  *linux*::*.*|*gnukfreebsd*::*.*|gnu::*.*)
    tHdrH=_tmpHdr
    rm -f $tHdrH'.h' $tHdrH
    touch $tHdrH'.h'
    # Filter out macro arguments, such as Linux's __INT8_C(c)
    if $cpp -dM $tHdrH'.h' > $tHdrH'_cppsym.h' && [ -s $tHdrH'_cppsym.h' ]; then
       sed -e 's/#define[\ \  ]*//;s/[\ \     ].*$//' -e 's/(.*//' <$tHdrH'_cppsym.h' >$tHdrH'_cppsym.real'
       if [ -s $tHdrH'_cppsym.real' ]; then
	  cat $tHdrH'_cppsym.real' Cppsym.know | sort | uniq | ./Cppsym | sort | uniq > Cppsym.true
       fi
    fi
    rm -f $tHdrH'.h' $tHdrH'_cppsym.h' $tHdrH'_cppsym.real'
  ;;
esac
: now check the C compiler for additional symbols
postprocess_cc_v=''
case "$osname" in
aix) postprocess_cc_v="|$tr , ' '" ;;
esac
$cat >ccsym <<EOS
$startsh
$cat >tmp.c <<EOF
extern int foo;
EOF
for i in \`$cc -v -c tmp.c 2>&1 $postprocess_cc_v\`
do
	case "\$i" in
	-D*) echo "\$i" | $sed 's/^-D//;s/['\''\"]//g';;
	-A*) $test "$gccversion" && echo "\$i" | $sed 's/^-A//' | $sed 's/\(.*\)(\(.*\))/\1=\2/';;
	esac
done
$rm_try
EOS
postprocess_cc_v=''
chmod +x ccsym
$eunicefix ccsym
./ccsym > ccsym1.raw
if $test -s ccsym1.raw; then
    $sort ccsym1.raw | $uniq >ccsym.raw
else
    mv ccsym1.raw ccsym.raw
fi

$awk '/=/ { print $0; next }
	{ print $0"=1" }' ccsym.raw >ccsym.list
$comm -13 Cppsym.true ccsym.list >ccsym.own
$comm -12 Cppsym.true ccsym.list >ccsym.com
$comm -23 Cppsym.true ccsym.list >ccsym.cpp
also=''
if $test -z ccsym.raw; then
	echo "Your C compiler doesn't seem to define any symbols!" >&4
	echo " "
	echo "However, your C preprocessor defines the following symbols:"
	$cat Cppsym.true
	ccsymbols=''
	cppsymbols=`$cat Cppsym.true`
	cppsymbols=`echo $cppsymbols`
	cppccsymbols="$cppsymbols"
else
	if $test -s ccsym.com; then
		echo "Your C compiler and pre-processor define these symbols:"
		$sed -e 's/\(..*\)=.*/\1/' ccsym.com
		also='also '
		symbols='ones'
		cppccsymbols=`$cat ccsym.com`
		cppccsymbols=`echo $cppccsymbols`
		$test "$silent" || sleep 1
	fi
	if $test -s ccsym.cpp; then
		$test "$also" && echo " "
		echo "Your C pre-processor ${also}defines the following symbols:"
		$sed -e 's/\(..*\)=.*/\1/' ccsym.cpp
		also='further '
		cppsymbols=`$cat ccsym.cpp`
		cppsymbols=`echo $cppsymbols`
		$test "$silent" || sleep 1
	fi
	if $test -s ccsym.own; then
		$test "$also" && echo " "
		echo "Your C compiler ${also}defines the following cpp symbols:"
		$sed -e 's/\(..*\)=1/\1/' ccsym.own
		$sed -e 's/\(..*\)=.*/\1/' ccsym.own | $uniq >>Cppsym.true
		ccsymbols=`$cat ccsym.own`
		ccsymbols=`echo $ccsymbols`
		$test "$silent" || sleep 1
	fi
fi

: add -D_FORTIFY_SOURCE if feasible and not already there
case "$gccversion" in
[456789].*|[1-9][0-9]*)	case "$optimize$ccflags" in
	*-O*)	case "$ccflags$cppsymbols" in
		*_FORTIFY_SOURCE=*) # Don't add it again.
			echo "You seem to have -D_FORTIFY_SOURCE already, not adding it." >&4
			;;
		*)	echo "Adding -D_FORTIFY_SOURCE=2 to ccflags..." >&4
			ccflags="$ccflags -D_FORTIFY_SOURCE=2"
			;;
		esac
		;;
	*)	echo "You have gcc 4.* or later but not optimizing, not adding -D_FORTIFY_SOURCE." >&4
		;;
	esac
	;;
*)	echo "You seem not to have gcc 4.* or later, not adding -D_FORTIFY_SOURCE." >&4
	;;
esac

: script used to emit important warnings
cat >warn <<EOS
$startsh
if test \$# -gt 0; then
	echo "\$@" >msg
else
	cat >msg
fi
echo "*** WARNING:" >&4
sed -e 's/^/*** /' <msg >&4
echo "*** " >&4
cat msg >>config.msg
echo " " >>config.msg
rm -f msg
EOS
chmod +x warn
$eunicefix warn

: see if this is a termio system
val="$undef"
val2="$undef"
val3="$undef"
if $test `./findhdr termios.h`; then
    set tcsetattr i_termios
    eval $inlibc
    val3="$i_termios"
fi
echo " "
case "$val3" in
    "$define") echo "You have POSIX termios.h... good!" >&4;;
    *)  if ./Cppsym pyr; then
	    case "`$run /bin/universe`" in
		ucb) if $test `./findhdr sgtty.h`; then
			val2="$define"
			echo "<sgtty.h> found." >&4
		    else
			echo "System is pyramid with BSD universe."
			./warn "<sgtty.h> not found--you could have problems."
		    fi;;
		*)  if $test `./findhdr termio.h`; then
			val="$define"
			echo "<termio.h> found." >&4
		    else
			echo "System is pyramid with USG universe."
			./warn "<termio.h> not found--you could have problems."
		    fi;;
	    esac
	elif ./usg; then
	    if $test `./findhdr termio.h`; then
		echo "<termio.h> found." >&4
		val="$define"
	    elif $test `./findhdr sgtty.h`; then
		echo "<sgtty.h> found." >&4
		val2="$define"
	    else
		./warn "Neither <termio.h> nor <sgtty.h> found--cross fingers!"
	    fi
	else
	    if $test `./findhdr sgtty.h`; then
		echo "<sgtty.h> found." >&4
		val2="$define"
	    elif $test `./findhdr termio.h`; then
		echo "<termio.h> found." >&4
		val="$define"
	    else
		./warn "Neither <sgtty.h> nor <termio.h> found--cross fingers!"
	    fi
	fi;;
esac
set i_termio; eval $setvar
val=$val2; set i_sgtty; eval $setvar
val=$val3; set i_termios; eval $setvar

: see if stdbool is available
: we want a real compile instead of Inhdr because some Solaris systems
: have stdbool.h, but it can only be used if the compiler indicates it
: is sufficiently c99-compliant.
echo " "
$cat >try.c <<EOCP
#include <stdio.h>
#include <stdbool.h>
int func(bool x)
{
    return x ? 1 : 0;
}
int main(int argc, char **argv)
{
    return func(0);
}
EOCP
set try
if eval $compile; then
	echo "<stdbool.h> found." >&4
	val="$define"
else
	echo "<stdbool.h> NOT found." >&4
	val="$undef"
fi
$rm_try
set i_stdbool
eval $setvar

: see if C23 stdckdint is available
: we want a real compile instead of Inhdr because some FreeBSD systems
: have stdckdint.h, but it is not compatible with C++.
case "$i_stdckdint" in
'')
    echo " "
    $cat >try.c <<EOCP
#include <stdio.h>
#include <stdckdint.h>
int func(long *resultptr, long a, long b)
{
    return (ckd_add(resultptr, a, b) ||
	    ckd_sub(resultptr, a, b) ||
	    ckd_mul(resultptr, a, b)) ? 1 : 0;
}
int main(int argc, char **argv)
{
    long result;
    return func(&result, 42L, 53L);
}
EOCP
    set try
    if eval $compile; then
	echo "<stdckdint.h> found." >&4
	val="$define"
    else
	echo "<stdckdint.h> NOT found." >&4
	val="$undef"
    fi ;;
*)
    val="$i_stdckdint" ;;
esac

$rm_try
set i_stdckdint
eval $setvar

: see if sys/access.h is available
set sys/access.h i_sysaccess
eval $inhdr

: see if ioctl defs are in sgtty, termio, sys/filio or sys/ioctl
set sys/filio.h i_sysfilio
eval $inhdr
echo " "
if $test `./findhdr sys/ioctl.h`; then
	val="$define"
	echo '<sys/ioctl.h> found.' >&4
else
	val="$undef"
	if $test $i_sysfilio = "$define"; then
	    echo '<sys/ioctl.h> NOT found.' >&4
	else
		$test $i_sgtty = "$define" && xxx="sgtty.h"
		$test $i_termio = "$define" && xxx="termio.h"
		$test $i_termios = "$define" && xxx="termios.h"
echo "No <sys/ioctl.h> found, assuming ioctl args are defined in <$xxx>." >&4
	fi
fi
set i_sysioctl
eval $setvar

: see if socket ioctl defs are in sys/sockio.h
echo " "
xxx=`./findhdr sys/sockio.h`
if $test "$xxx"; then
	if $contains SIOCATMARK $xxx >/dev/null 2>&1; then
		val="$define"
		echo "You have socket ioctls defined in <sys/sockio.h>." >&4
	else
		val="$undef"
		echo "No socket ioctls found in <sys/sockio.h>." >&4
	fi
else
	val="$undef"
	$cat <<EOM
<sys/sockio.h> not found, assuming socket ioctls are in <sys/ioctl.h>.
EOM
fi
set i_syssockio
eval $setvar

: see if this is a syslog.h system
set syslog.h i_syslog
eval $inhdr

: see if this is a sys/mode.h system
set sys/mode.h i_sysmode
eval $inhdr

: see if there is a sys/poll.h file
set sys/poll.h i_syspoll
eval $inhdr

: see if this is a sys/random.h system
set sys/random.h i_sysrandom
eval $inhdr

: see if sys/resource.h has to be included
set sys/resource.h i_sysresrc
eval $inhdr

: see if sys/security.h is available
set sys/security.h i_syssecrt
eval $inhdr

: see if this is a sys/statvfs.h system
set sys/statvfs.h i_sysstatvfs
eval $inhdr

: see if this is a sys/un.h system
set sys/un.h i_sysun
eval $inhdr

: see if this is a sys/utsname.h system
set sys/utsname.h i_sysutsname
eval $inhdr

: see if this is a syswait system
set sys/wait.h i_syswait
eval $inhdr

: see if this is a ustat.h system
set ustat.h i_ustat
eval $inhdr

: see if this is an utime system
set utime.h i_utime
eval $inhdr

: see if this is a vfork system
case "$d_vfork" in
"$define")
	set vfork.h i_vfork
	eval $inhdr
	;;
*)
	i_vfork="$undef"
	;;
esac

: see if wchar.h is present
set wchar.h i_wchar
eval $inhdr

: Check extensions
echo " "
echo "Looking for extensions..." >&4
: If we are using the old config.sh, nonxs_extensions and xs_extensions may
: contain old or inaccurate or duplicate values.
nonxs_extensions=''
xs_extensions=''
: We do not use find because it might not be available.
: We do not just use MANIFEST because the user may have dropped
: some additional extensions into the source tree and expect them
: to be built.

: Function to recursively find available extensions, ignoring DynaLoader
: NOTE: recursion limit of 10 to prevent runaway in case of symlink madness
: In 5.10.1 and later, extensions are stored in directories
: like File-Glob instead of the older File/Glob/.
find_extensions='
    for xxx in *; do
	case "$xxx" in
	    DynaLoader|dynaload) ;;
	    *)
	    this_ext=`echo "$xxx" | $sed -e s/-/\\\//g`;
	    case "$this_ext" in
		Scalar/List/Utils) this_ext="List/Util"	;;
		PathTools)         this_ext="Cwd"	;;
	    esac;
	    echo " $xs_extensions $nonxs_extensions" > "$tdir/$$.tmp";
	    if $contains " $this_ext " "$tdir/$$.tmp"; then
		echo >&4;
		echo "Duplicate directories detected for extension $xxx" >&4;
		echo "Configure cannot correctly recover from this - shall I abort?" >&4;
		case "$knowitall" in
		"") dflt=y;;
		*) dflt=n;;
		esac;
		. ../UU/myread;
		case "$ans" in
		n*|N*) ;;
		*) echo >&4;
		    echo "Ok.  Stopping Configure." >&4;
		    echo "Please remove the duplicate directory (e.g. using git clean) and then re-run Configure" >&4;
		    exit 1;;
		esac;
		echo "Ok.  You will need to correct config.sh before running make." >&4;
	    fi;
	    $ls -1 "$xxx" > "$tdir/$$.tmp";
	    if   $contains "\.xs$" "$tdir/$$.tmp" > /dev/null 2>&1; then
		xs_extensions="$xs_extensions $this_ext";
	    elif $contains "\.c$"  "$tdir/$$.tmp" > /dev/null 2>&1; then
		xs_extensions="$xs_extensions $this_ext";
	    elif $test -d "$xxx"; then
		nonxs_extensions="$nonxs_extensions $this_ext";
	    fi;
	    $rm -f "$tdir/$$.tmp";
	    ;;
	esac;
    done'
tdir=`pwd`
cd "$rsrc/cpan"
set X
shift
eval $find_extensions
cd "$rsrc/dist"
set X
shift
eval $find_extensions
cd "$rsrc/ext"
set X
shift
eval $find_extensions
set X $xs_extensions
shift
xs_extensions=`echo "$*" | tr ' ' $trnl | $sort | tr $trnl ' '`
set X $nonxs_extensions
shift
nonxs_extensions=`echo "$*" | tr ' ' $trnl | $sort | tr $trnl ' '`
cd "$tdir"
known_extensions=`echo $nonxs_extensions $xs_extensions  | tr ' ' $trnl | $sort | tr $trnl ' '`

: Now see which are supported on this system.
avail_ext=''
for xxx in $xs_extensions ; do
	case "$xxx" in
	Amiga*)
		case "$osname" in
		amigaos) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	DB_File|db_file)
		case "$i_db" in
		$define) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	GDBM_File|gdbm_fil)
		case "$i_gdbm" in
		$define) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	IPC/SysV|ipc/sysv)
		: XXX Do we need a useipcsysv variable here
		case "${d_msg}${d_sem}${d_shm}" in
		*"${define}"*) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	NDBM_File|ndbm_fil)
		case "$d_ndbm" in
		$define)
		    case "$osname-$use64bitint" in
		    hpux-define)
			case "$libs" in
			*-lndbm*) avail_ext="$avail_ext $xxx" ;;
			esac
			;;
		    *) avail_ext="$avail_ext $xxx" ;;
		    esac
		    ;;
		esac
		;;
	ODBM_File|odbm_fil)
		case "${i_dbm}${i_rpcsvcdbm}" in
		*"${define}"*)
		    case "$d_cplusplus" in
		    define) ;; # delete as a function name will not work
		    *)  case "$osname-$use64bitint" in
			hpux-define)
			    case "$libs" in
			    *-ldbm*) avail_ext="$avail_ext $xxx" ;;
			    esac
			    ;;
			*) avail_ext="$avail_ext $xxx" ;;
			esac
			;;
		    esac
		    ;;
		esac
		;;
	Opcode|opcode)
		case "$useopcode" in
		true|define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	POSIX|posix)
		case "$useposix" in
		true|define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	Socket|socket)
		case "$d_socket" in
		true|$define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	I18N/Langinfo|langinfo)
		case "$uselanginfo" in
		true|define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	Sys/Syslog|sys/syslog)
		case $osname in
			amigaos) ;; # not really very useful on AmigaOS
			*)
			: XXX syslog requires socket
			case "$d_socket" in
			true|$define|y) avail_ext="$avail_ext $xxx" ;;
			esac
			;;
		esac
		;;
	threads|threads/shared)
		# threads and threads::shared are special cases.
		# To stop people from asking "Perl 5.8.0 was supposed
		# to have this new fancy threads implementation but my
		# perl doesn't have it" and from people trying to
		# (re)install the threads module using CPAN.pm and
		# CPAN.pm then offering to reinstall Perl 5.8.0,
		# the threads.pm and threads/shared.pm will always be
		# there, croaking informatively ("you need to rebuild
		# all of Perl with threads, sorry") when threads haven't
		# been compiled in.
		# --jhi
		avail_ext="$avail_ext $xxx"
		;;
	VMS*)
		;;
	Win32*)
		case "$osname" in
		cygwin) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	XS/APItest|xs/apitest)
		# This is just for testing.  Skip it unless we have dynamic loading.

		case "$usedl" in
		$define) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	XS/Typemap|xs/typemap)
		# This is just for testing.  Skip it unless we have dynamic loading.
		case "$usedl" in
		$define) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	*)	avail_ext="$avail_ext $xxx"
		;;
	esac
done

set X $avail_ext
shift
avail_ext="$*"

case "$onlyextensions" in
'') ;;
*)  keepextensions=''
    echo "You have requested that only certain extensions be included..." >&4
    for i in $onlyextensions; do
        case " $avail_ext " in
        *" $i "*)
            echo "Keeping extension $i."
            keepextensions="$keepextensions $i"
            ;;
        *) echo "Ignoring extension $i." ;;
        esac
    done
    avail_ext="$keepextensions"
    ;;
esac

case "$noextensions" in
'') ;;
*)  keepextensions=''
    echo "You have requested that certain extensions be ignored..." >&4
    for i in $avail_ext; do
        case " $noextensions " in
        *" $i "*) echo "Ignoring extension $i." ;;
        *) echo "Keeping extension $i.";
           keepextensions="$keepextensions $i"
           ;;
        esac
    done
    avail_ext="$keepextensions"
    ;;
esac

: Now see which nonxs extensions are supported on this system.
: For now assume all are.
nonxs_ext=''
for xxx in $nonxs_extensions ; do
	case "$xxx" in
	VMS*)
		;;
	*)	nonxs_ext="$nonxs_ext $xxx"
		;;
	esac
done

set X $nonxs_ext
shift
nonxs_ext="$*"

case $usedl in
$define)
	$cat <<EOM
A number of extensions are supplied with $package.  You may choose to
compile these extensions for dynamic loading (the default), compile
them into the $package executable (static loading), or not include
them at all.  Answer "none" to include no extensions.
Note that DynaLoader is always built and need not be mentioned here.

EOM
	case "$dynamic_ext" in
	'')
		: Exclude those listed in static_ext
		dflt=''
		for xxx in $avail_ext; do
			case " $static_ext " in
			*" $xxx "*) ;;
			*) dflt="$dflt $xxx" ;;
			esac
		done
		set X $dflt
		shift
		dflt="$*"
		;;
	*)	dflt="$dynamic_ext"
		# Perhaps we are reusing an old out-of-date config.sh.
		case "$hint" in
		previous)
			if test X"$dynamic_ext" != X"$avail_ext"; then
				$cat <<EOM
NOTICE:  Your previous config.sh list may be incorrect.
The extensions now available to you are
	${avail_ext}
but the default list from your previous config.sh is
	${dynamic_ext}

EOM
			fi
			;;
		esac
		;;
	esac
	case "$dflt" in
	'')	dflt=none;;
	esac
	rp="What extensions do you wish to load dynamically?"
	. ./myread
	case "$ans" in
	none) dynamic_ext=' ' ;;
	*) dynamic_ext="$ans" ;;
	esac

	case "$static_ext" in
	'')
		: Exclude those already listed in dynamic linking
		dflt=''
		for xxx in $avail_ext; do
			case " $dynamic_ext " in
			*" $xxx "*) ;;
			*) dflt="$dflt $xxx" ;;
			esac
		done
		set X $dflt
		shift
		dflt="$*"
		;;
	*)  dflt="$static_ext"
		;;
	esac

	case "$dflt" in
	'')	dflt=none;;
	esac
	rp="What extensions do you wish to load statically?"
	. ./myread
	case "$ans" in
	none) static_ext=' ' ;;
	*) static_ext="$ans" ;;
	esac
	;;
*)
	$cat <<EOM
A number of extensions are supplied with $package.  Answer "none"
to include no extensions.
Note that DynaLoader is always built and need not be mentioned here.

EOM
	case "$static_ext" in
	'') dflt="$avail_ext" ;;
	*)	dflt="$static_ext"
		# Perhaps we are reusing an old out-of-date config.sh.
		case "$hint" in
		previous)
			if test X"$static_ext" != X"$avail_ext"; then
				$cat <<EOM
NOTICE:  Your previous config.sh list may be incorrect.
The extensions now available to you are
	${avail_ext}
but the default list from your previous config.sh is
	${static_ext}

EOM
			fi
			;;
		esac
		;;
	esac
	: Exclude those that are not xs extensions
	case "$dflt" in
	'')	dflt=none;;
	esac
	rp="What extensions do you wish to include?"
	. ./myread
	case "$ans" in
	none) static_ext=' ' ;;
	*) static_ext="$ans" ;;
	esac
	;;
esac
#
# Encode is a special case.  If we are building Encode as a static
# extension, we need to explicitly list its subextensions as well.
# For other nested extensions, this is handled automatically by
# the appropriate Makefile.PL.
case " $static_ext " in
	*" Encode "*) # Add the subextensions of Encode
	cd "$rsrc/cpan"
	for xxx in `ls Encode/*/Makefile.PL|awk -F/ '{print $2}'`; do
		static_ext="$static_ext Encode/$xxx"
		known_extensions="$known_extensions Encode/$xxx"
	done
	cd "$tdir"
	;;
esac

set X $dynamic_ext $static_ext $nonxs_ext
shift
extensions="$*"

# Sanity check:  We require an extension suitable for use with
# AnyDBM_File, as well as Fcntl and IO.  (Failure to have these
# should show up as failures in the test suite, but it's helpful to
# catch them now.) The 'extensions' list is normally sorted
# alphabetically, so we need to accept either
#    DB_File ... Fcntl ... IO  ....
# or something like
#    Fcntl ... NDBM_File ... IO  ....
case " $extensions"  in
*"_File "*" Fcntl "*" IO "*) ;; # DB_File
*" Fcntl "*"_File "*" IO "*) ;; # GDBM_File
*" Fcntl "*" IO "*"_File "*) ;; # NDBM_File
*) echo "WARNING: Extensions DB_File or *DBM_File, Fcntl, and IO not configured." >&4
   echo "WARNING: The Perl you are building will be quite crippled." >&4
   ;;
esac

: Remove libraries needed only for extensions
: The appropriate ext/Foo/Makefile.PL will add them back in, if necessary.
: The exception is SunOS 4.x, which needs them.
case "${osname}X${osvers}" in
sunos*X4*)
    perllibs="$libs"
    ;;
*) case "$usedl" in
    $define|true|[yY]*)
	    set X `echo " $libs " | sed -e 's@ -lndbm @ @' -e 's@ -lgdbm @ @' -e 's@ -lgdbm_compat @ @' -e 's@ -ldbm @ @' -e 's@ -ldb @ @'`
	    shift
	    perllibs="$*"
	    ;;
    *)	perllibs="$libs"
	    ;;
    esac
    ;;
esac

: Remove build directory name from cppstdin so it can be used from
: either the present location or the final installed location.
echo " "
: Get out of the UU directory to get correct path name.
cd ..
case "$cppstdin" in
`pwd`/cppstdin)
	echo "Stripping down cppstdin path name"
	cppstdin=cppstdin
	;;
esac
cd UU

: end of configuration questions
echo " "
echo "End of configuration questions."
echo " "

: back to where it started
if test -d ../UU; then
	cd ..
fi

: configuration may be unconditionally patched via a 'config.arch' file
if $test -f config.arch; then
	echo "I see a config.arch file, loading it." >&4
	. ./config.arch
fi

: configuration may be patched via a 'config.over' file
if $test -f config.over; then
	echo " "
	dflt=y
	rp='I see a config.over file.  Do you wish to load it?'
	. UU/myread
	case "$ans" in
	n*) echo "OK, I'll ignore it.";;
	*)	. ./config.over
		echo "Configuration override changes have been loaded."
		;;
	esac
fi

: in case they want portability, strip down executable paths
case "$d_portable" in
"$define")
	echo " "
	echo "Stripping down executable paths..." >&4
	for file in $loclist $trylist; do
		eval temp=\$$file
		eval $file=`basename $temp`
	done
	;;
esac

: create config.sh file
echo " "
echo "Creating config.sh..." >&4
$spitshell <<EOT >config.sh
$startsh
#
# This file was produced by running the Configure script. It holds all the
# definitions figured out by Configure. Should you modify one of these values,
# do not forget to propagate your changes by running "Configure -der". You may
# instead choose to run each of the .SH files by yourself, or "Configure -S".
#

# Package name      : $package
# Source directory  : $src
# Configuration time: $cf_time
# Configured by     : $cf_by
# Target system     : $myuname

EOT
: Add in command line options if available
$test -f UU/cmdline.opt && $cat UU/cmdline.opt >> config.sh

$spitshell <<EOT >>config.sh

Author='$Author'
Date='$Date'
Header='$Header'
Id='$Id'
Locker='$Locker'
Log='$Log'
RCSfile='$RCSfile'
Revision='$Revision'
Source='$Source'
State='$State'
_a='$_a'
_exe='$_exe'
_o='$_o'
afs='$afs'
afsroot='$afsroot'
alignbytes='$alignbytes'
aphostname='$aphostname'
api_revision='$api_revision'
api_subversion='$api_subversion'
api_version='$api_version'
api_versionstring='$api_versionstring'
ar='$ar'
archlib='$archlib'
archlibexp='$archlibexp'
archname64='$archname64'
archname='$archname'
archobjs='$archobjs'
asctime_r_proto='$asctime_r_proto'
awk='$awk'
baserev='$baserev'
bash='$bash'
bin='$bin'
bin_ELF='$bin_ELF'
binexp='$binexp'
bison='$bison'
byacc='$byacc'
byteorder='$byteorder'
c='$c'
castflags='$castflags'
cat='$cat'
cc='$cc'
cccdlflags='$cccdlflags'
ccdlflags='$ccdlflags'
ccflags='$ccflags'
ccflags_uselargefiles='$ccflags_uselargefiles'
ccname='$ccname'
ccsymbols='$ccsymbols'
ccversion='$ccversion'
cf_by='$cf_by'
cf_email='$cf_email'
cf_time='$cf_time'
charbits='$charbits'
charsize='$charsize'
chgrp='$chgrp'
chmod='$chmod'
chown='$chown'
clocktype='$clocktype'
comm='$comm'
compiler_warning='$compiler_warning'
compress='$compress'
contains='$contains'
cp='$cp'
cpio='$cpio'
cpp='$cpp'
cpp_stuff='$cpp_stuff'
cppccsymbols='$cppccsymbols'
cppflags='$cppflags'
cpplast='$cpplast'
cppminus='$cppminus'
cpprun='$cpprun'
cppstdin='$cppstdin'
cppsymbols='$cppsymbols'
crypt_r_proto='$crypt_r_proto'
cryptlib='$cryptlib'
csh='$csh'
ctermid_r_proto='$ctermid_r_proto'
ctime_r_proto='$ctime_r_proto'
d_Gconvert='$d_Gconvert'
d_PRIEUldbl='$d_PRIEUldbl'
d_PRIFUldbl='$d_PRIFUldbl'
d_PRIGUldbl='$d_PRIGUldbl'
d_PRIXU64='$d_PRIXU64'
d_PRId64='$d_PRId64'
d_PRIeldbl='$d_PRIeldbl'
d_PRIfldbl='$d_PRIfldbl'
d_PRIgldbl='$d_PRIgldbl'
d_PRIi64='$d_PRIi64'
d_PRIo64='$d_PRIo64'
d_PRIu64='$d_PRIu64'
d_PRIx64='$d_PRIx64'
d_SCNfldbl='$d_SCNfldbl'
d__fwalk='$d__fwalk'
d_accept4='$d_accept4'
d_access='$d_access'
d_accessx='$d_accessx'
d_acosh='$d_acosh'
d_aintl='$d_aintl'
d_alarm='$d_alarm'
d_archlib='$d_archlib'
d_asctime64='$d_asctime64'
d_asctime_r='$d_asctime_r'
d_asinh='$d_asinh'
d_atanh='$d_atanh'
d_atolf='$d_atolf'
d_atoll='$d_atoll'
d_attribute_always_inline='$d_attribute_always_inline'
d_attribute_deprecated='$d_attribute_deprecated'
d_attribute_format='$d_attribute_format'
d_attribute_malloc='$d_attribute_malloc'
d_attribute_nonnull='$d_attribute_nonnull'
d_attribute_noreturn='$d_attribute_noreturn'
d_attribute_pure='$d_attribute_pure'
d_attribute_unused='$d_attribute_unused'
d_attribute_visibility='$d_attribute_visibility'
d_attribute_warn_unused_result='$d_attribute_warn_unused_result'
d_backtrace='$d_backtrace'
d_bsd='$d_bsd'
d_bsdgetpgrp='$d_bsdgetpgrp'
d_bsdsetpgrp='$d_bsdsetpgrp'
d_builtin_add_overflow='$d_builtin_add_overflow'
d_builtin_choose_expr='$d_builtin_choose_expr'
d_builtin_expect='$d_builtin_expect'
d_builtin_mul_overflow='$d_builtin_mul_overflow'
d_builtin_sub_overflow='$d_builtin_sub_overflow'
d_c99_variadic_macros='$d_c99_variadic_macros'
d_casti32='$d_casti32'
d_castneg='$d_castneg'
d_cbrt='$d_cbrt'
d_chown='$d_chown'
d_chroot='$d_chroot'
d_chsize='$d_chsize'
d_class='$d_class'
d_clearenv='$d_clearenv'
d_closedir='$d_closedir'
d_cmsghdr_s='$d_cmsghdr_s'
d_copysign='$d_copysign'
d_copysignl='$d_copysignl'
d_cplusplus='$d_cplusplus'
d_crypt='$d_crypt'
d_crypt_r='$d_crypt_r'
d_csh='$d_csh'
d_ctermid='$d_ctermid'
d_ctermid_r='$d_ctermid_r'
d_ctime64='$d_ctime64'
d_ctime_r='$d_ctime_r'
d_cuserid='$d_cuserid'
d_dbminitproto='$d_dbminitproto'
d_difftime64='$d_difftime64'
d_difftime='$d_difftime'
d_dir_dd_fd='$d_dir_dd_fd'
d_dirfd='$d_dirfd'
d_dirnamlen='$d_dirnamlen'
d_dladdr='$d_dladdr'
d_dlerror='$d_dlerror'
d_dlopen='$d_dlopen'
d_dlsymun='$d_dlsymun'
d_dosuid='$d_dosuid'
d_double_has_inf='$d_double_has_inf'
d_double_has_nan='$d_double_has_nan'
d_double_has_negative_zero='$d_double_has_negative_zero'
d_double_has_subnormals='$d_double_has_subnormals'
d_double_style_cray='$d_double_style_cray'
d_double_style_ibm='$d_double_style_ibm'
d_double_style_ieee='$d_double_style_ieee'
d_double_style_vax='$d_double_style_vax'
d_drand48_r='$d_drand48_r'
d_drand48proto='$d_drand48proto'
d_dup2='$d_dup2'
d_dup3='$d_dup3'
d_duplocale='$d_duplocale'
d_eaccess='$d_eaccess'
d_endgrent='$d_endgrent'
d_endgrent_r='$d_endgrent_r'
d_endhent='$d_endhent'
d_endhostent_r='$d_endhostent_r'
d_endnent='$d_endnent'
d_endnetent_r='$d_endnetent_r'
d_endpent='$d_endpent'
d_endprotoent_r='$d_endprotoent_r'
d_endpwent='$d_endpwent'
d_endpwent_r='$d_endpwent_r'
d_endsent='$d_endsent'
d_endservent_r='$d_endservent_r'
d_eofnblk='$d_eofnblk'
d_erf='$d_erf'
d_erfc='$d_erfc'
d_eunice='$d_eunice'
d_exp2='$d_exp2'
d_expm1='$d_expm1'
d_faststdio='$d_faststdio'
d_fchdir='$d_fchdir'
d_fchmod='$d_fchmod'
d_fchmodat='$d_fchmodat'
d_fchown='$d_fchown'
d_fcntl='$d_fcntl'
d_fcntl_can_lock='$d_fcntl_can_lock'
d_fd_macros='$d_fd_macros'
d_fd_set='$d_fd_set'
d_fdclose='$d_fdclose'
d_fdim='$d_fdim'
d_fdopendir='$d_fdopendir'
d_fds_bits='$d_fds_bits'
d_fegetround='$d_fegetround'
d_ffs='$d_ffs'
d_ffsl='$d_ffsl'
d_fgetpos='$d_fgetpos'
d_finite='$d_finite'
d_finitel='$d_finitel'
d_flexfnam='$d_flexfnam'
d_flock='$d_flock'
d_flockproto='$d_flockproto'
d_fma='$d_fma'
d_fmax='$d_fmax'
d_fmin='$d_fmin'
d_fork='$d_fork'
d_fp_class='$d_fp_class'
d_fp_classify='$d_fp_classify'
d_fp_classl='$d_fp_classl'
d_fpathconf='$d_fpathconf'
d_fpclass='$d_fpclass'
d_fpclassify='$d_fpclassify'
d_fpclassl='$d_fpclassl'
d_fpgetround='$d_fpgetround'
d_fpos64_t='$d_fpos64_t'
d_freelocale='$d_freelocale'
d_frexpl='$d_frexpl'
d_fs_data_s='$d_fs_data_s'
d_fseeko='$d_fseeko'
d_fsetpos='$d_fsetpos'
d_fstatfs='$d_fstatfs'
d_fstatvfs='$d_fstatvfs'
d_fsync='$d_fsync'
d_ftello='$d_ftello'
d_ftime='$d_ftime'
d_futimes='$d_futimes'
d_gai_strerror='$d_gai_strerror'
d_gdbm_ndbm_h_uses_prototypes='$d_gdbm_ndbm_h_uses_prototypes'
d_gdbmndbm_h_uses_prototypes='$d_gdbmndbm_h_uses_prototypes'
d_getaddrinfo='$d_getaddrinfo'
d_getcwd='$d_getcwd'
d_getentropy='$d_getentropy'
d_getenv_preserves_other_thread='$d_getenv_preserves_other_thread'
d_getespwnam='$d_getespwnam'
d_getfsstat='$d_getfsstat'
d_getgrent='$d_getgrent'
d_getgrent_r='$d_getgrent_r'
d_getgrgid_r='$d_getgrgid_r'
d_getgrnam_r='$d_getgrnam_r'
d_getgrps='$d_getgrps'
d_gethbyaddr='$d_gethbyaddr'
d_gethbyname='$d_gethbyname'
d_gethent='$d_gethent'
d_gethname='$d_gethname'
d_gethostbyaddr_r='$d_gethostbyaddr_r'
d_gethostbyname_r='$d_gethostbyname_r'
d_gethostent_r='$d_gethostent_r'
d_gethostprotos='$d_gethostprotos'
d_getitimer='$d_getitimer'
d_getlogin='$d_getlogin'
d_getlogin_r='$d_getlogin_r'
d_getmnt='$d_getmnt'
d_getmntent='$d_getmntent'
d_getnameinfo='$d_getnameinfo'
d_getnbyaddr='$d_getnbyaddr'
d_getnbyname='$d_getnbyname'
d_getnent='$d_getnent'
d_getnetbyaddr_r='$d_getnetbyaddr_r'
d_getnetbyname_r='$d_getnetbyname_r'
d_getnetent_r='$d_getnetent_r'
d_getnetprotos='$d_getnetprotos'
d_getpagsz='$d_getpagsz'
d_getpbyname='$d_getpbyname'
d_getpbynumber='$d_getpbynumber'
d_getpent='$d_getpent'
d_getpgid='$d_getpgid'
d_getpgrp2='$d_getpgrp2'
d_getpgrp='$d_getpgrp'
d_getppid='$d_getppid'
d_getprior='$d_getprior'
d_getprotobyname_r='$d_getprotobyname_r'
d_getprotobynumber_r='$d_getprotobynumber_r'
d_getprotoent_r='$d_getprotoent_r'
d_getprotoprotos='$d_getprotoprotos'
d_getprpwnam='$d_getprpwnam'
d_getpwent='$d_getpwent'
d_getpwent_r='$d_getpwent_r'
d_getpwnam_r='$d_getpwnam_r'
d_getpwuid_r='$d_getpwuid_r'
d_getsbyname='$d_getsbyname'
d_getsbyport='$d_getsbyport'
d_getsent='$d_getsent'
d_getservbyname_r='$d_getservbyname_r'
d_getservbyport_r='$d_getservbyport_r'
d_getservent_r='$d_getservent_r'
d_getservprotos='$d_getservprotos'
d_getspnam='$d_getspnam'
d_getspnam_r='$d_getspnam_r'
d_gettimeod='$d_gettimeod'
d_gmtime64='$d_gmtime64'
d_gmtime_r='$d_gmtime_r'
d_gnulibc='$d_gnulibc'
d_grpasswd='$d_grpasswd'
d_has_C_UTF8='$d_has_C_UTF8'
d_hasmntopt='$d_hasmntopt'
d_htonl='$d_htonl'
d_hypot='$d_hypot'
d_ilogb='$d_ilogb'
d_ilogbl='$d_ilogbl'
d_inc_version_list='$d_inc_version_list'
d_inetaton='$d_inetaton'
d_inetntop='$d_inetntop'
d_inetpton='$d_inetpton'
d_int64_t='$d_int64_t'
d_ip_mreq='$d_ip_mreq'
d_ip_mreq_source='$d_ip_mreq_source'
d_ipv6_mreq='$d_ipv6_mreq'
d_ipv6_mreq_source='$d_ipv6_mreq_source'
d_isascii='$d_isascii'
d_isblank='$d_isblank'
d_isfinite='$d_isfinite'
d_isfinitel='$d_isfinitel'
d_isinf='$d_isinf'
d_isinfl='$d_isinfl'
d_isless='$d_isless'
d_isnan='$d_isnan'
d_isnanl='$d_isnanl'
d_isnormal='$d_isnormal'
d_j0='$d_j0'
d_j0l='$d_j0l'
d_killpg='$d_killpg'
d_lc_monetary_2008='$d_lc_monetary_2008'
d_lchown='$d_lchown'
d_ldbl_dig='$d_ldbl_dig'
d_ldexpl='$d_ldexpl'
d_lgamma='$d_lgamma'
d_lgamma_r='$d_lgamma_r'
d_libm_lib_version='$d_libm_lib_version'
d_libname_unique='$d_libname_unique'
d_link='$d_link'
d_linkat='$d_linkat'
d_llrint='$d_llrint'
d_llrintl='$d_llrintl'
d_llround='$d_llround'
d_llroundl='$d_llroundl'
d_localeconv_l='$d_localeconv_l'
d_localtime64='$d_localtime64'
d_localtime_r='$d_localtime_r'
d_localtime_r_needs_tzset='$d_localtime_r_needs_tzset'
d_locconv='$d_locconv'
d_lockf='$d_lockf'
d_log1p='$d_log1p'
d_log2='$d_log2'
d_logb='$d_logb'
d_long_double_style_ieee='$d_long_double_style_ieee'
d_long_double_style_ieee_doubledouble='$d_long_double_style_ieee_doubledouble'
d_long_double_style_ieee_extended='$d_long_double_style_ieee_extended'
d_long_double_style_ieee_std='$d_long_double_style_ieee_std'
d_long_double_style_vax='$d_long_double_style_vax'
d_longdbl='$d_longdbl'
d_longlong='$d_longlong'
d_lrint='$d_lrint'
d_lrintl='$d_lrintl'
d_lround='$d_lround'
d_lroundl='$d_lroundl'
d_lseekproto='$d_lseekproto'
d_lstat='$d_lstat'
d_madvise='$d_madvise'
d_malloc_good_size='$d_malloc_good_size'
d_malloc_size='$d_malloc_size'
d_malloc_usable_size='$d_malloc_usable_size'
d_mblen='$d_mblen'
d_mbrlen='$d_mbrlen'
d_mbrtowc='$d_mbrtowc'
d_mbstowcs='$d_mbstowcs'
d_mbtowc='$d_mbtowc'
d_memmem='$d_memmem'
d_memrchr='$d_memrchr'
d_mkdir='$d_mkdir'
d_mkdtemp='$d_mkdtemp'
d_mkfifo='$d_mkfifo'
d_mkostemp='$d_mkostemp'
d_mkstemp='$d_mkstemp'
d_mkstemps='$d_mkstemps'
d_mktime64='$d_mktime64'
d_mktime='$d_mktime'
d_mmap='$d_mmap'
d_modfl='$d_modfl'
d_modflproto='$d_modflproto'
d_mprotect='$d_mprotect'
d_msg='$d_msg'
d_msg_ctrunc='$d_msg_ctrunc'
d_msg_dontroute='$d_msg_dontroute'
d_msg_oob='$d_msg_oob'
d_msg_peek='$d_msg_peek'
d_msg_proxy='$d_msg_proxy'
d_msgctl='$d_msgctl'
d_msgget='$d_msgget'
d_msghdr_s='$d_msghdr_s'
d_msgrcv='$d_msgrcv'
d_msgsnd='$d_msgsnd'
d_msync='$d_msync'
d_munmap='$d_munmap'
d_mymalloc='$d_mymalloc'
d_nan='$d_nan'
d_nanosleep='$d_nanosleep'
d_ndbm='$d_ndbm'
d_ndbm_h_uses_prototypes='$d_ndbm_h_uses_prototypes'
d_nearbyint='$d_nearbyint'
d_newlocale='$d_newlocale'
d_nextafter='$d_nextafter'
d_nexttoward='$d_nexttoward'
d_nice='$d_nice'
d_nl_langinfo='$d_nl_langinfo'
d_nl_langinfo_l='$d_nl_langinfo_l'
d_non_int_bitfields='$d_non_int_bitfields'
d_nv_preserves_uv='$d_nv_preserves_uv'
d_nv_zero_is_allbits_zero='$d_nv_zero_is_allbits_zero'
d_off64_t='$d_off64_t'
d_old_pthread_create_joinable='$d_old_pthread_create_joinable'
d_oldpthreads='$d_oldpthreads'
d_oldsock='$d_oldsock'
d_open3='$d_open3'
d_openat='$d_openat'
d_pathconf='$d_pathconf'
d_pause='$d_pause'
d_perl_lc_all_category_positions_init='$d_perl_lc_all_category_positions_init'
d_perl_lc_all_separator='$d_perl_lc_all_separator'
d_perl_lc_all_uses_name_value_pairs='$d_perl_lc_all_uses_name_value_pairs'
d_perl_otherlibdirs='$d_perl_otherlibdirs'
d_phostname='$d_phostname'
d_pipe2='$d_pipe2'
d_pipe='$d_pipe'
d_poll='$d_poll'
d_portable='$d_portable'
d_prctl='$d_prctl'
d_prctl_set_name='$d_prctl_set_name'
d_printf_format_null='$d_printf_format_null'
d_procselfexe='$d_procselfexe'
d_pseudofork='$d_pseudofork'
d_pthread_atfork='$d_pthread_atfork'
d_pthread_attr_setscope='$d_pthread_attr_setscope'
d_pthread_yield='$d_pthread_yield'
d_ptrdiff_t='$d_ptrdiff_t'
d_pwage='$d_pwage'
d_pwchange='$d_pwchange'
d_pwclass='$d_pwclass'
d_pwcomment='$d_pwcomment'
d_pwexpire='$d_pwexpire'
d_pwgecos='$d_pwgecos'
d_pwpasswd='$d_pwpasswd'
d_pwquota='$d_pwquota'
d_qgcvt='$d_qgcvt'
d_quad='$d_quad'
d_querylocale='$d_querylocale'
d_random_r='$d_random_r'
d_re_comp='$d_re_comp'
d_readdir64_r='$d_readdir64_r'
d_readdir='$d_readdir'
d_readdir_r='$d_readdir_r'
d_readlink='$d_readlink'
d_readv='$d_readv'
d_recvmsg='$d_recvmsg'
d_regcmp='$d_regcmp'
d_regcomp='$d_regcomp'
d_remainder='$d_remainder'
d_remquo='$d_remquo'
d_rename='$d_rename'
d_renameat='$d_renameat'
d_rewinddir='$d_rewinddir'
d_rint='$d_rint'
d_rmdir='$d_rmdir'
d_round='$d_round'
d_sbrkproto='$d_sbrkproto'
d_scalbn='$d_scalbn'
d_scalbnl='$d_scalbnl'
d_sched_yield='$d_sched_yield'
d_scm_rights='$d_scm_rights'
d_seekdir='$d_seekdir'
d_select='$d_select'
d_sem='$d_sem'
d_semctl='$d_semctl'
d_semctl_semid_ds='$d_semctl_semid_ds'
d_semctl_semun='$d_semctl_semun'
d_semget='$d_semget'
d_semop='$d_semop'
d_sendmsg='$d_sendmsg'
d_setegid='$d_setegid'
d_setenv='$d_setenv'
d_seteuid='$d_seteuid'
d_setgrent='$d_setgrent'
d_setgrent_r='$d_setgrent_r'
d_setgrps='$d_setgrps'
d_sethent='$d_sethent'
d_sethostent_r='$d_sethostent_r'
d_setitimer='$d_setitimer'
d_setlinebuf='$d_setlinebuf'
d_setlocale='$d_setlocale'
d_setlocale_accepts_any_locale_name='$d_setlocale_accepts_any_locale_name'
d_setlocale_r='$d_setlocale_r'
d_setnent='$d_setnent'
d_setnetent_r='$d_setnetent_r'
d_setpent='$d_setpent'
d_setpgid='$d_setpgid'
d_setpgrp2='$d_setpgrp2'
d_setpgrp='$d_setpgrp'
d_setprior='$d_setprior'
d_setproctitle='$d_setproctitle'
d_setprotoent_r='$d_setprotoent_r'
d_setpwent='$d_setpwent'
d_setpwent_r='$d_setpwent_r'
d_setregid='$d_setregid'
d_setresgid='$d_setresgid'
d_setresuid='$d_setresuid'
d_setreuid='$d_setreuid'
d_setrgid='$d_setrgid'
d_setruid='$d_setruid'
d_setsent='$d_setsent'
d_setservent_r='$d_setservent_r'
d_setsid='$d_setsid'
d_setvbuf='$d_setvbuf'
d_shm='$d_shm'
d_shmat='$d_shmat'
d_shmatprototype='$d_shmatprototype'
d_shmctl='$d_shmctl'
d_shmdt='$d_shmdt'
d_shmget='$d_shmget'
d_sigaction='$d_sigaction'
d_siginfo_si_addr='$d_siginfo_si_addr'
d_siginfo_si_band='$d_siginfo_si_band'
d_siginfo_si_errno='$d_siginfo_si_errno'
d_siginfo_si_fd='$d_siginfo_si_fd'
d_siginfo_si_pid='$d_siginfo_si_pid'
d_siginfo_si_status='$d_siginfo_si_status'
d_siginfo_si_uid='$d_siginfo_si_uid'
d_siginfo_si_value='$d_siginfo_si_value'
d_signbit='$d_signbit'
d_sigprocmask='$d_sigprocmask'
d_sigsetjmp='$d_sigsetjmp'
d_sin6_scope_id='$d_sin6_scope_id'
d_sitearch='$d_sitearch'
d_snprintf='$d_snprintf'
d_sockaddr_in6='$d_sockaddr_in6'
d_sockaddr_sa_len='$d_sockaddr_sa_len'
d_sockaddr_storage='$d_sockaddr_storage'
d_sockatmark='$d_sockatmark'
d_sockatmarkproto='$d_sockatmarkproto'
d_socket='$d_socket'
d_socklen_t='$d_socklen_t'
d_sockpair='$d_sockpair'
d_socks5_init='$d_socks5_init'
d_sqrtl='$d_sqrtl'
d_srand48_r='$d_srand48_r'
d_srandom_r='$d_srandom_r'
d_sresgproto='$d_sresgproto'
d_sresuproto='$d_sresuproto'
d_stat='$d_stat'
d_statblks='$d_statblks'
d_statfs_f_flags='$d_statfs_f_flags'
d_statfs_s='$d_statfs_s'
d_static_inline='$d_static_inline'
d_statvfs='$d_statvfs'
d_stdio_cnt_lval='$d_stdio_cnt_lval'
d_stdio_ptr_lval='$d_stdio_ptr_lval'
d_stdio_ptr_lval_nochange_cnt='$d_stdio_ptr_lval_nochange_cnt'
d_stdio_ptr_lval_sets_cnt='$d_stdio_ptr_lval_sets_cnt'
d_stdio_stream_array='$d_stdio_stream_array'
d_stdiobase='$d_stdiobase'
d_stdstdio='$d_stdstdio'
d_strcoll='$d_strcoll'
d_strerror_l='$d_strerror_l'
d_strerror_r='$d_strerror_r'
d_strftime='$d_strftime'
d_strlcat='$d_strlcat'
d_strlcpy='$d_strlcpy'
d_strnlen='$d_strnlen'
d_strtod='$d_strtod'
d_strtod_l='$d_strtod_l'
d_strtol='$d_strtol'
d_strtold='$d_strtold'
d_strtold_l='$d_strtold_l'
d_strtoll='$d_strtoll'
d_strtoq='$d_strtoq'
d_strtoul='$d_strtoul'
d_strtoull='$d_strtoull'
d_strtouq='$d_strtouq'
d_strxfrm='$d_strxfrm'
d_strxfrm_l='$d_strxfrm_l'
d_suidsafe='$d_suidsafe'
d_symlink='$d_symlink'
d_syscall='$d_syscall'
d_syscallproto='$d_syscallproto'
d_sysconf='$d_sysconf'
d_sysernlst='$d_sysernlst'
d_syserrlst='$d_syserrlst'
d_system='$d_system'
d_tcgetpgrp='$d_tcgetpgrp'
d_tcsetpgrp='$d_tcsetpgrp'
d_telldir='$d_telldir'
d_telldirproto='$d_telldirproto'
d_tgamma='$d_tgamma'
d_thread_local='$d_thread_local'
d_time='$d_time'
d_timegm='$d_timegm'
d_times='$d_times'
d_tm_tm_gmtoff='$d_tm_tm_gmtoff'
d_tm_tm_zone='$d_tm_tm_zone'
d_tmpnam_r='$d_tmpnam_r'
d_towlower='$d_towlower'
d_towupper='$d_towupper'
d_trunc='$d_trunc'
d_truncate='$d_truncate'
d_truncl='$d_truncl'
d_ttyname_r='$d_ttyname_r'
d_tzname='$d_tzname'
d_u32align='$d_u32align'
d_ualarm='$d_ualarm'
d_umask='$d_umask'
d_uname='$d_uname'
d_union_semun='$d_union_semun'
d_unlinkat='$d_unlinkat'
d_unordered='$d_unordered'
d_unsetenv='$d_unsetenv'
d_uselocale='$d_uselocale'
d_usleep='$d_usleep'
d_usleepproto='$d_usleepproto'
d_ustat='$d_ustat'
d_vendorarch='$d_vendorarch'
d_vendorbin='$d_vendorbin'
d_vendorlib='$d_vendorlib'
d_vendorscript='$d_vendorscript'
d_vfork='$d_vfork'
d_void_closedir='$d_void_closedir'
d_voidsig='$d_voidsig'
d_voidtty='$d_voidtty'
d_vsnprintf='$d_vsnprintf'
d_wait4='$d_wait4'
d_waitpid='$d_waitpid'
d_wcrtomb='$d_wcrtomb'
d_wcscmp='$d_wcscmp'
d_wcstombs='$d_wcstombs'
d_wcsxfrm='$d_wcsxfrm'
d_wctomb='$d_wctomb'
d_writev='$d_writev'
d_xenix='$d_xenix'
date='$date'
db_hashtype='$db_hashtype'
db_prefixtype='$db_prefixtype'
db_version_major='$db_version_major'
db_version_minor='$db_version_minor'
db_version_patch='$db_version_patch'
default_inc_excludes_dot='$default_inc_excludes_dot'
direntrytype='$direntrytype'
dlext='$dlext'
dlsrc='$dlsrc'
doubleinfbytes='$doubleinfbytes'
doublekind='$doublekind'
doublemantbits='$doublemantbits'
doublenanbytes='$doublenanbytes'
doublesize='$doublesize'
drand01='$drand01'
drand48_r_proto='$drand48_r_proto'
dtrace='$dtrace'
dtraceobject='$dtraceobject'
dtracexnolibs='$dtracexnolibs'
dynamic_ext='$dynamic_ext'
eagain='$eagain'
ebcdic='$ebcdic'
echo='$echo'
egrep='$egrep'
emacs='$emacs'
endgrent_r_proto='$endgrent_r_proto'
endhostent_r_proto='$endhostent_r_proto'
endnetent_r_proto='$endnetent_r_proto'
endprotoent_r_proto='$endprotoent_r_proto'
endpwent_r_proto='$endpwent_r_proto'
endservent_r_proto='$endservent_r_proto'
eunicefix='$eunicefix'
exe_ext='$exe_ext'
expr='$expr'
extensions='$extensions'
extern_C='$extern_C'
extras='$extras'
fflushNULL='$fflushNULL'
fflushall='$fflushall'
find='$find'
firstmakefile='$firstmakefile'
flex='$flex'
fpossize='$fpossize'
fpostype='$fpostype'
freetype='$freetype'
from='$from'
full_ar='$full_ar'
full_csh='$full_csh'
full_sed='$full_sed'
gccansipedantic='$gccansipedantic'
gccosandvers='$gccosandvers'
gccversion='$gccversion'
getgrent_r_proto='$getgrent_r_proto'
getgrgid_r_proto='$getgrgid_r_proto'
getgrnam_r_proto='$getgrnam_r_proto'
gethostbyaddr_r_proto='$gethostbyaddr_r_proto'
gethostbyname_r_proto='$gethostbyname_r_proto'
gethostent_r_proto='$gethostent_r_proto'
getlogin_r_proto='$getlogin_r_proto'
getnetbyaddr_r_proto='$getnetbyaddr_r_proto'
getnetbyname_r_proto='$getnetbyname_r_proto'
getnetent_r_proto='$getnetent_r_proto'
getprotobyname_r_proto='$getprotobyname_r_proto'
getprotobynumber_r_proto='$getprotobynumber_r_proto'
getprotoent_r_proto='$getprotoent_r_proto'
getpwent_r_proto='$getpwent_r_proto'
getpwnam_r_proto='$getpwnam_r_proto'
getpwuid_r_proto='$getpwuid_r_proto'
getservbyname_r_proto='$getservbyname_r_proto'
getservbyport_r_proto='$getservbyport_r_proto'
getservent_r_proto='$getservent_r_proto'
getspnam_r_proto='$getspnam_r_proto'
gidformat='$gidformat'
gidsign='$gidsign'
gidsize='$gidsize'
gidtype='$gidtype'
glibpth='$glibpth'
gmake='$gmake'
gmtime_r_proto='$gmtime_r_proto'
gnulibc_version='$gnulibc_version'
grep='$grep'
groupcat='$groupcat'
groupstype='$groupstype'
gzip='$gzip'
h_fcntl='$h_fcntl'
h_sysfile='$h_sysfile'
hint='$hint'
hostcat='$hostcat'
hostgenerate='$hostgenerate'
hostosname='$hostosname'
hostperl='$hostperl'
html1dir='$html1dir'
html1direxp='$html1direxp'
html3dir='$html3dir'
html3direxp='$html3direxp'
i16size='$i16size'
i16type='$i16type'
i32dformat='$i32dformat'
i32size='$i32size'
i32type='$i32type'
i64size='$i64size'
i64type='$i64type'
i8size='$i8size'
i8type='$i8type'
i_arpainet='$i_arpainet'
i_bfd='$i_bfd'
i_bsdioctl='$i_bsdioctl'
i_crypt='$i_crypt'
i_db='$i_db'
i_dbm='$i_dbm'
i_dirent='$i_dirent'
i_dlfcn='$i_dlfcn'
i_execinfo='$i_execinfo'
i_fcntl='$i_fcntl'
i_fenv='$i_fenv'
i_fp='$i_fp'
i_fp_class='$i_fp_class'
i_gdbm='$i_gdbm'
i_gdbm_ndbm='$i_gdbm_ndbm'
i_gdbmndbm='$i_gdbmndbm'
i_grp='$i_grp'
i_ieeefp='$i_ieeefp'
i_inttypes='$i_inttypes'
i_langinfo='$i_langinfo'
i_libutil='$i_libutil'
i_locale='$i_locale'
i_machcthr='$i_machcthr'
i_malloc='$i_malloc'
i_mallocmalloc='$i_mallocmalloc'
i_mntent='$i_mntent'
i_ndbm='$i_ndbm'
i_netdb='$i_netdb'
i_neterrno='$i_neterrno'
i_netinettcp='$i_netinettcp'
i_niin='$i_niin'
i_poll='$i_poll'
i_prot='$i_prot'
i_pthread='$i_pthread'
i_pwd='$i_pwd'
i_quadmath='$i_quadmath'
i_rpcsvcdbm='$i_rpcsvcdbm'
i_sgtty='$i_sgtty'
i_shadow='$i_shadow'
i_socks='$i_socks'
i_stdbool='$i_stdbool'
i_stdckdint='$i_stdckdint'
i_stdint='$i_stdint'
i_stdlib='$i_stdlib'
i_sunmath='$i_sunmath'
i_sysaccess='$i_sysaccess'
i_sysdir='$i_sysdir'
i_sysfile='$i_sysfile'
i_sysfilio='$i_sysfilio'
i_sysin='$i_sysin'
i_sysioctl='$i_sysioctl'
i_syslog='$i_syslog'
i_sysmman='$i_sysmman'
i_sysmode='$i_sysmode'
i_sysmount='$i_sysmount'
i_sysndir='$i_sysndir'
i_sysparam='$i_sysparam'
i_syspoll='$i_syspoll'
i_sysrandom='$i_sysrandom'
i_sysresrc='$i_sysresrc'
i_syssecrt='$i_syssecrt'
i_sysselct='$i_sysselct'
i_syssockio='$i_syssockio'
i_sysstat='$i_sysstat'
i_sysstatfs='$i_sysstatfs'
i_sysstatvfs='$i_sysstatvfs'
i_syssyscall='$i_syssyscall'
i_systime='$i_systime'
i_systimek='$i_systimek'
i_systimes='$i_systimes'
i_systypes='$i_systypes'
i_sysuio='$i_sysuio'
i_sysun='$i_sysun'
i_sysutsname='$i_sysutsname'
i_sysvfs='$i_sysvfs'
i_syswait='$i_syswait'
i_termio='$i_termio'
i_termios='$i_termios'
i_time='$i_time'
i_unistd='$i_unistd'
i_ustat='$i_ustat'
i_utime='$i_utime'
i_vfork='$i_vfork'
i_wchar='$i_wchar'
i_wctype='$i_wctype'
i_xlocale='$i_xlocale'
ignore_versioned_solibs='$ignore_versioned_solibs'
inc_version_list='$inc_version_list'
inc_version_list_init='$inc_version_list_init'
incpath='$incpath'
incpth='$incpth'
inews='$inews'
initialinstalllocation='$initialinstalllocation'
installarchlib='$installarchlib'
installbin='$installbin'
installhtml1dir='$installhtml1dir'
installhtml3dir='$installhtml3dir'
installman1dir='$installman1dir'
installman3dir='$installman3dir'
installprefix='$installprefix'
installprefixexp='$installprefixexp'
installprivlib='$installprivlib'
installscript='$installscript'
installsitearch='$installsitearch'
installsitebin='$installsitebin'
installsitehtml1dir='$installsitehtml1dir'
installsitehtml3dir='$installsitehtml3dir'
installsitelib='$installsitelib'
installsiteman1dir='$installsiteman1dir'
installsiteman3dir='$installsiteman3dir'
installsitescript='$installsitescript'
installstyle='$installstyle'
installusrbinperl='$installusrbinperl'
installvendorarch='$installvendorarch'
installvendorbin='$installvendorbin'
installvendorhtml1dir='$installvendorhtml1dir'
installvendorhtml3dir='$installvendorhtml3dir'
installvendorlib='$installvendorlib'
installvendorman1dir='$installvendorman1dir'
installvendorman3dir='$installvendorman3dir'
installvendorscript='$installvendorscript'
intmaxsize='$intmaxsize'
intsize='$intsize'
issymlink='$issymlink'
ivdformat='$ivdformat'
ivsize='$ivsize'
ivtype='$ivtype'
known_extensions='$known_extensions'
ksh='$ksh'
ld='$ld'
ld_can_script='$ld_can_script'
lddlflags='$lddlflags'
ldflags='$ldflags'
ldflags_uselargefiles='$ldflags_uselargefiles'
ldlibpthname='$ldlibpthname'
less='$less'
lib_ext='$lib_ext'
libc='$libc'
libperl='$libperl'
libpth='$libpth'
libs='$libs'
libsdirs='$libsdirs'
libsfiles='$libsfiles'
libsfound='$libsfound'
libspath='$libspath'
libswanted='$libswanted'
libswanted_uselargefiles='$libswanted_uselargefiles'
line='$line'
lint='$lint'
lkflags='$lkflags'
ln='$ln'
lns='$lns'
localtime_r_proto='$localtime_r_proto'
locincpth='$locincpth'
loclibpth='$loclibpth'
longdblinfbytes='$longdblinfbytes'
longdblkind='$longdblkind'
longdblmantbits='$longdblmantbits'
longdblnanbytes='$longdblnanbytes'
longdblsize='$longdblsize'
longlongsize='$longlongsize'
longsize='$longsize'
lp='$lp'
lpr='$lpr'
ls='$ls'
lseeksize='$lseeksize'
lseektype='$lseektype'
mail='$mail'
mailx='$mailx'
make='$make'
make_set_make='$make_set_make'
mallocobj='$mallocobj'
mallocsrc='$mallocsrc'
malloctype='$malloctype'
man1dir='$man1dir'
man1direxp='$man1direxp'
man1ext='$man1ext'
man3dir='$man3dir'
man3direxp='$man3direxp'
man3ext='$man3ext'
mips_type='$mips_type'
mistrustnm='$mistrustnm'
mkdir='$mkdir'
mmaptype='$mmaptype'
modetype='$modetype'
more='$more'
multiarch='$multiarch'
mv='$mv'
myarchname='$myarchname'
mydomain='$mydomain'
myhostname='$myhostname'
myuname='$myuname'
n='$n'
need_va_copy='$need_va_copy'
netdb_hlen_type='$netdb_hlen_type'
netdb_host_type='$netdb_host_type'
netdb_name_type='$netdb_name_type'
netdb_net_type='$netdb_net_type'
nm='$nm'
nm_opt='$nm_opt'
nm_so_opt='$nm_so_opt'
nonxs_ext='$nonxs_ext'
nroff='$nroff'
nvEUformat='$nvEUformat'
nvFUformat='$nvFUformat'
nvGUformat='$nvGUformat'
nv_overflows_integers_at='$nv_overflows_integers_at'
nv_preserves_uv_bits='$nv_preserves_uv_bits'
nveformat='$nveformat'
nvfformat='$nvfformat'
nvgformat='$nvgformat'
nvmantbits='$nvmantbits'
nvsize='$nvsize'
nvtype='$nvtype'
o_nonblock='$o_nonblock'
obj_ext='$obj_ext'
old_pthread_create_joinable='$old_pthread_create_joinable'
optimize='$optimize'
orderlib='$orderlib'
osname='$osname'
osvers='$osvers'
otherlibdirs='$otherlibdirs'
package='$package'
pager='$pager'
passcat='$passcat'
patchlevel='$patchlevel'
path_sep='$path_sep'
perl5='$perl5'
perl='$perl'
perl_lc_all_category_positions_init='$perl_lc_all_category_positions_init'
perl_lc_all_separator='$perl_lc_all_separator'
perl_patchlevel='$perl_patchlevel'
perl_static_inline='$perl_static_inline'
perl_thread_local='$perl_thread_local'
perladmin='$perladmin'
perllibs='$perllibs'
perlpath='$perlpath'
pg='$pg'
phostname='$phostname'
pidtype='$pidtype'
plibpth='$plibpth'
pmake='$pmake'
pr='$pr'
prefix='$prefix'
prefixexp='$prefixexp'
privlib='$privlib'
privlibexp='$privlibexp'
procselfexe='$procselfexe'
ptrsize='$ptrsize'
quadkind='$quadkind'
quadtype='$quadtype'
randbits='$randbits'
randfunc='$randfunc'
random_r_proto='$random_r_proto'
randseedtype='$randseedtype'
ranlib='$ranlib'
rd_nodata='$rd_nodata'
readdir64_r_proto='$readdir64_r_proto'
readdir_r_proto='$readdir_r_proto'
revision='$revision'
rm='$rm'
rm_try='$rm_try'
rmail='$rmail'
run='$run'
runnm='$runnm'
sGMTIME_max='$sGMTIME_max'
sGMTIME_min='$sGMTIME_min'
sLOCALTIME_max='$sLOCALTIME_max'
sLOCALTIME_min='$sLOCALTIME_min'
sPRIEUldbl='$sPRIEUldbl'
sPRIFUldbl='$sPRIFUldbl'
sPRIGUldbl='$sPRIGUldbl'
sPRIXU64='$sPRIXU64'
sPRId64='$sPRId64'
sPRIeldbl='$sPRIeldbl'
sPRIfldbl='$sPRIfldbl'
sPRIgldbl='$sPRIgldbl'
sPRIi64='$sPRIi64'
sPRIo64='$sPRIo64'
sPRIu64='$sPRIu64'
sPRIx64='$sPRIx64'
sSCNfldbl='$sSCNfldbl'
sched_yield='$sched_yield'
scriptdir='$scriptdir'
scriptdirexp='$scriptdirexp'
sed='$sed'
seedfunc='$seedfunc'
selectminbits='$selectminbits'
selecttype='$selecttype'
sendmail='$sendmail'
setgrent_r_proto='$setgrent_r_proto'
sethostent_r_proto='$sethostent_r_proto'
setlocale_r_proto='$setlocale_r_proto'
setnetent_r_proto='$setnetent_r_proto'
setprotoent_r_proto='$setprotoent_r_proto'
setpwent_r_proto='$setpwent_r_proto'
setservent_r_proto='$setservent_r_proto'
sh='$sh'
shar='$shar'
sharpbang='$sharpbang'
shmattype='$shmattype'
shortsize='$shortsize'
shrpenv='$shrpenv'
shsharp='$shsharp'
sig_count='$sig_count'
sig_name='$sig_name'
sig_name_init='$sig_name_init'
sig_num='$sig_num'
sig_num_init='$sig_num_init'
sig_size='$sig_size'
signal_t='$signal_t'
sitearch='$sitearch'
sitearchexp='$sitearchexp'
sitebin='$sitebin'
sitebinexp='$sitebinexp'
sitehtml1dir='$sitehtml1dir'
sitehtml1direxp='$sitehtml1direxp'
sitehtml3dir='$sitehtml3dir'
sitehtml3direxp='$sitehtml3direxp'
sitelib='$sitelib'
sitelib_stem='$sitelib_stem'
sitelibexp='$sitelibexp'
siteman1dir='$siteman1dir'
siteman1direxp='$siteman1direxp'
siteman3dir='$siteman3dir'
siteman3direxp='$siteman3direxp'
siteprefix='$siteprefix'
siteprefixexp='$siteprefixexp'
sitescript='$sitescript'
sitescriptexp='$sitescriptexp'
sizesize='$sizesize'
sizetype='$sizetype'
sleep='$sleep'
smail='$smail'
so='$so'
sockethdr='$sockethdr'
socketlib='$socketlib'
socksizetype='$socksizetype'
sort='$sort'
spackage='$spackage'
spitshell='$spitshell'
srand48_r_proto='$srand48_r_proto'
srandom_r_proto='$srandom_r_proto'
src='$src'
ssizetype='$ssizetype'
st_dev_sign='$st_dev_sign'
st_dev_size='$st_dev_size'
st_ino_sign='$st_ino_sign'
st_ino_size='$st_ino_size'
startperl='$startperl'
startsh='$startsh'
static_ext='$static_ext'
stdchar='$stdchar'
stdio_base='$stdio_base'
stdio_bufsiz='$stdio_bufsiz'
stdio_cnt='$stdio_cnt'
stdio_filbuf='$stdio_filbuf'
stdio_ptr='$stdio_ptr'
stdio_stream_array='$stdio_stream_array'
strerror_r_proto='$strerror_r_proto'
submit='$submit'
subversion='$subversion'
sysman='$sysman'
sysroot='$sysroot'
tail='$tail'
tar='$tar'
targetarch='$targetarch'
targetdir='$targetdir'
targetenv='$targetenv'
targethost='$targethost'
targetmkdir='$targetmkdir'
targetport='$targetport'
targetsh='$targetsh'
tbl='$tbl'
tee='$tee'
test='$test'
timeincl='$timeincl'
timetype='$timetype'
tmpnam_r_proto='$tmpnam_r_proto'
to='$to'
touch='$touch'
tr='$tr'
trnl='$trnl'
troff='$troff'
ttyname_r_proto='$ttyname_r_proto'
u16size='$u16size'
u16type='$u16type'
u32XUformat='$u32XUformat'
u32oformat='$u32oformat'
u32size='$u32size'
u32type='$u32type'
u32uformat='$u32uformat'
u32xformat='$u32xformat'
u64size='$u64size'
u64type='$u64type'
u8size='$u8size'
u8type='$u8type'
uidformat='$uidformat'
uidsign='$uidsign'
uidsize='$uidsize'
uidtype='$uidtype'
uname='$uname'
uniq='$uniq'
uquadtype='$uquadtype'
use64bitall='$use64bitall'
use64bitint='$use64bitint'
usecbacktrace='$usecbacktrace'
usecrosscompile='$usecrosscompile'
usedefaultstrict='$usedefaultstrict'
usedevel='$usedevel'
usedl='$usedl'
usedtrace='$usedtrace'
usefaststdio='$usefaststdio'
useithreads='$useithreads'
usekernprocpathname='$usekernprocpathname'
uselanginfo='$uselanginfo'
uselargefiles='$uselargefiles'
uselongdouble='$uselongdouble'
usemallocwrap='$usemallocwrap'
usemorebits='$usemorebits'
usemultiplicity='$usemultiplicity'
usemymalloc='$usemymalloc'
usenm='$usenm'
usensgetexecutablepath='$usensgetexecutablepath'
useopcode='$useopcode'
useperlio='$useperlio'
useposix='$useposix'
usequadmath='$usequadmath'
usereentrant='$usereentrant'
userelocatableinc='$userelocatableinc'
useshrplib='$useshrplib'
usesitecustomize='$usesitecustomize'
usesocks='$usesocks'
usethreads='$usethreads'
usevendorprefix='$usevendorprefix'
useversionedarchname='$useversionedarchname'
usevfork='$usevfork'
usrinc='$usrinc'
uuname='$uuname'
uvXUformat='$uvXUformat'
uvoformat='$uvoformat'
uvsize='$uvsize'
uvtype='$uvtype'
uvuformat='$uvuformat'
uvxformat='$uvxformat'
vendorarch='$vendorarch'
vendorarchexp='$vendorarchexp'
vendorbin='$vendorbin'
vendorbinexp='$vendorbinexp'
vendorhtml1dir='$vendorhtml1dir'
vendorhtml1direxp='$vendorhtml1direxp'
vendorhtml3dir='$vendorhtml3dir'
vendorhtml3direxp='$vendorhtml3direxp'
vendorlib='$vendorlib'
vendorlib_stem='$vendorlib_stem'
vendorlibexp='$vendorlibexp'
vendorman1dir='$vendorman1dir'
vendorman1direxp='$vendorman1direxp'
vendorman3dir='$vendorman3dir'
vendorman3direxp='$vendorman3direxp'
vendorprefix='$vendorprefix'
vendorprefixexp='$vendorprefixexp'
vendorscript='$vendorscript'
vendorscriptexp='$vendorscriptexp'
version='$version'
version_patchlevel_string='$version_patchlevel_string'
versiononly='$versiononly'
vi='$vi'
xlibpth='$xlibpth'
xlocale_needed='$xlocale_needed'
yacc='$yacc'
yaccflags='$yaccflags'
zcat='$zcat'
zip='$zip'
EOT

: add special variables
$test -f $src/patchlevel.h && \
awk '/^#define[ 	]+PERL_/ {printf "%s=%s\n",$2,$3}' $src/patchlevel.h >>config.sh
echo "PERL_PATCHLEVEL='$perl_patchlevel'" >>config.sh
echo "PERL_CONFIG_SH=true" >>config.sh

: propagate old symbols
if $test -f UU/config.sh; then
	<UU/config.sh $sort | $uniq >UU/oldconfig.sh
	$sed -n 's/^\([a-zA-Z_0-9]*\)=.*/\1/p' \
		config.sh config.sh UU/oldconfig.sh |\
		$sort | $uniq -u >UU/oldsyms
	set X `$cat UU/oldsyms`
	shift
	case $# in
	0) ;;
	*)
		$cat <<EOM
Hmm...You had some extra variables I don't know about...I'll try to keep 'em...
EOM
		echo ": Variables propagated from previous config.sh file." >>config.sh
		for sym in `$cat UU/oldsyms`; do
			echo "    Propagating $hint variable "'$'"$sym..."
			eval 'tmp="$'"${sym}"'"'
			echo "$tmp" | \
				sed -e "s/'/'\"'\"'/g" -e "s/^/$sym='/" -e "s/$/'/" >>config.sh
		done
		;;
	esac
fi

: preserve RCS keywords in files with variable substitution, grrr
Id='$Id'

: Finish up by extracting the .SH files
case "$alldone" in
exit)
	echo "Stopping at your request, leaving temporary files around."
	exit 0
	;;
cont)
	;;
'')
	dflt=''
	nostick=true
	$cat <<EOM

If you'd like to make any changes to the config.sh file before I begin
to configure things, do it as a shell escape now (e.g. !vi config.sh).

EOM
	rp="Press return or use a shell escape to edit config.sh:"
	. UU/myread
	nostick=''
	case "$ans" in
	'') ;;
	*) : in case they cannot read
		sh 1>&4 -c "$ans";;
	esac
	;;
esac

: if this fails, just run all the .SH files by hand
. ./config.sh

echo " "
exec 1>&4
pwd=`pwd`
. ./UU/extract
cd "$pwd"

if $contains '^depend:' [Mm]akefile >/dev/null 2>&1; then
	dflt=y
	case "$silent" in
	true) ;;
	*)
		$cat <<EOM

Now you need to generate make dependencies by running "$make depend".
You might prefer to run it in background: "$make depend > makedepend.out &"
It can take a while, so you might not want to run it right now.

EOM
		;;
	esac
	rp="Run $make depend now?"
	. UU/myread
	case "$ans" in
	y*)
		$make depend && echo "Now you must run '$make'."
		;;
	*)
		echo "You must run '$make depend' then '$make'."
		;;
	esac
elif test -f [Mm]akefile; then
	echo " "
	echo "Now you must run a $make."
else
	echo "Configure done."
fi

if $test -f Policy.sh; then
    $cat <<EOM

If you compile $package on a different machine or from a different object
directory, copy the Policy.sh file from this object directory to the
new one before you run Configure -- this will help you with most of
the policy defaults.

EOM
fi
if $test -f UU/config.msg; then
    echo "Hmm.  I also noted the following information while running:"
    echo " "
    $cat UU/config.msg >&4
fi
$rm -f kit*isdone ark*isdone
$rm -rf UU

: End of Configure