compiler: update aro and translate-c to latest; delete clang translate-c

[andrewrk]

This deletes our implementation of translate-c which is based on libclang and replaces it with one based on arocc and translate-c.

Goodbye, and good riddance, to 5,940 lines of our remaining C++ code in the source repository, with 3,763 remaining.

Progress towards #20630. In the future, Zig will drop the @cImport language builtin, but for now, it remains, backed by Aro instead of Clang.

Progress towards #16270

Upgrade Guide

This is technically a non-breaking change. While breakage is likely due to one C compiler being swapped out for another, if it occurs it is a bug rather than a feature.

So, cross your fingers when you upgrade and report a bug if something breaks.

Merge Checklist

• get the standalone executable working
• integrate with frontend using jitCmd, properly passing Compilation state (mainly include dirs and target information)

[andrewrk]

When trying to communicate CLI options to the translate-c executable these are not yet handled:

• target cpu features
• -x c
• warning: unknown argument '--no-default-config'
• warning: unknown argument '-gdwarf-4'
• warning: unknown argument '-gdwarf32'
• warning: unknown argument '-fno-lto'
• warning: unknown argument '-MD'
• warning: unknown argument '-MV'
• warning: unknown argument '-MF'
• warning: unknown argument '-mred-zone'
• warning: unknown argument '-fno-omit-frame-pointer'
• warning: unknown argument '-fno-stack-protector'
• warning: unknown argument '-fbuiltin'
• warning: unknown argument '-fno-function-sections'
• warning: unknown argument '-fno-data-sections'
• warning: unknown argument '-fasynchronous-unwind-tables'
• warning: unknown argument '-fno-spell-checking'
• warning: unknown argument '-fsanitize=undefined'
• warning: unknown argument '-fno-sanitize=vptr'
• warning: unknown argument '-fno-sanitize=function'
• warning: unknown argument '-Xclang -detailed-preprocessing-record'
• error: invalid target 'x86_64-unknown-linux6.15.1-gnu2.39.0'

manually reduced command:

./translate_c -target x86_64-linux-gnu -fno-PIE -fno-PIC -fhosted -nostdinc -D__GLIBC_MINOR__=39 -isystem /home/andy/dev/zig/lib/include -isystem /nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include -O0 hello.c

fails:

/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/features.h:503:9: warning: '__GLIBC_MINOR__' macro redefined [-Wmacro-redefined]
#define __GLIBC_MINOR__ 40
        ^
<command line>:2:9: note: previous definition is here
#define __GLIBC_MINOR__ 39
        ^
/home/andy/dev/zig/lib/include/__stddef_size_t.h:15:33: error: function-like macro '__building_module' is not defined
    (__has_feature(modules) && !__building_module(_Builtin_stddef))
                                ^
/home/andy/dev/zig/lib/include/__stddef_null.h:10:24: error: function-like macro '__building_module' is not defined
#if !defined(NULL) || !__building_module(_Builtin_stddef)
                       ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:28:43: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
                                          size_t __nbytes);
                                          ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:28:50: error: expected ')', found 'an identifier'
                                          size_t __nbytes);
                                                 ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:27:42: note: to match this '('
typedef __ssize_t cookie_read_function_t (void *__cookie, char *__buf,
                                         ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:28:50: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
                                          size_t __nbytes);
                                                 ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:28:58: error: expected ';', found ')'
                                          size_t __nbytes);
                                                         ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:37:44: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
                                           size_t __nbytes);
                                           ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:37:51: error: expected ')', found 'an identifier'
                                           size_t __nbytes);
                                                  ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:36:43: note: to match this '('
typedef __ssize_t cookie_write_function_t (void *__cookie, const char *__buf,
                                          ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:37:51: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
                                           size_t __nbytes);
                                                  ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:37:59: error: expected ';', found ')'
                                           size_t __nbytes);
                                                          ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:57:3: error: unknown type name 'cookie_read_function_t'
  cookie_read_function_t *read;         /* Read bytes.  */
  ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/bits/types/cookie_io_functions_t.h:58:3: error: unknown type name 'cookie_write_function_t'
  cookie_write_function_t *write;       /* Write bytes.  */
  ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:184:36: warning: unknown attribute '__nonnull__' ignored [-Wunknown-attributes]
extern int fclose (FILE *__stream) __nonnull ((1));
                                   ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/sys/cdefs.h:561:28: note: expanded from here
# define __nonnull(params) __attribute_nonnull__ (params)
                           ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/sys/cdefs.h:555:57: note: expanded from here
#  define __attribute_nonnull__(params) __attribute__ ((__nonnull__ params))
                                                        ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:273:42: warning: unknown attribute '__nonnull__' ignored [-Wunknown-attributes]
                      FILE *__restrict __stream) __wur __nonnull ((3));
                                         ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/sys/cdefs.h:561:28: note: expanded from here
# define __nonnull(params) __attribute_nonnull__ (params)
                           ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/sys/cdefs.h:555:57: note: expanded from here
#  define __attribute_nonnull__(params) __attribute__ ((__nonnull__ params))
                                                        ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:314:35: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
                                  ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:314:42: error: expected ')', found 'an identifier'
extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
                                         ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:314:23: note: to match this '('
extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
                      ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:314:42: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
                                         ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:314:49: error: expected identifier or '('
extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
                                                ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:314:68: error: expected ';', found ')'
extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
                                                                   ^

(truncated)

[andrewrk]

aha, aro does not support clang's C runtime includes, which makes sense.

andy@bark ~/d/z/build-release (aro-translate-c)> ./translate_c -target x86_64-linux-gnu -fno-PIE -fno-PIC -fhosted -nostdinc -D__GLIBC_MINOR__=39 -isystem /home/andy/src/arocc/include -isystem /nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include -O0 hello.c > hello.zig 2>stderr.txt
andy@bark ~/d/z/build-release (aro-translate-c)> stage3/bin/zig run hello.zig -lc
hello world

stderr.txt contains:

/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/features.h:503:9: warning: '__GLIBC_MINOR__' macro redefined [-Wmacro-redefined]
#define	__GLIBC_MINOR__	40
        ^
<command line>:2:9: note: previous definition is here
#define __GLIBC_MINOR__ 39
        ^
/nix/store/r25srliigrrv5q3n7y8ms6z10spvjcd9-glibc-2.40-66-dev/include/stdio.h:184:36: warning: unknown attribute '__nonnull__' ignored [-Wunknown-attributes]
extern int fclose (FILE *__stream) __nonnull ((1));
                                   ^