Release: cannot find iconv, incorrect character in configure script

[Efreak]

checking for library containing iconv... no configure: error: "iconv is required for locale conversion"

pipes.c on  master [⇡]
✦ ❯ ./configure
checking for a BSD-compatible install... /data/data/com.termux/files/usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /data/data/com.termux/files/usr/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports the include directive... yes (GNU style)
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether gcc understands -c and -o together... yes
checking dependency style of gcc... gcc3
checking for ar... ar
checking the archiver (ar) interface... ar
checking for ranlib... ranlib
checking for a sed that does not truncate output... /data/data/com.termux/files/usr/bin/sed
checking for gcc option to accept ISO C99... none needed
checking for pkg-config... /data/data/com.termux/files/usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for ncursesw via pkg-config... yes
checking for working ncursesw/curses.h... yes
checking for working ncursesw.h... no
checking for working ncurses.h... yes
checking for init_extended_color(0, 0, 0, 0)... yes
checking for alloc_pair(0, 0)... yes
checking whether C compiler accepts -Werror=unknown-warning-option... yes
checking whether C compiler accepts -Wno-suggest-attribute=format... yes
checking whether C compiler accepts -fno-strict-aliasing... yes
checking whether C compiler accepts -Wall... yes
checking whether C compiler accepts -Wextra... yes
checking whether C compiler accepts -Wundef... yes
checking whether C compiler accepts -Wwrite-strings... yes
checking whether C compiler accepts -Wpointer-arith... yes
checking whether C compiler accepts -Wmissing-declarations... yes
checking whether C compiler accepts -Wredundant-decls... yes
checking whether C compiler accepts -Wno-unused-parameter... yes
checking whether C compiler accepts -Wno-missing-field-initializers... yes
checking whether C compiler accepts -Wformat=2... yes
checking whether C compiler accepts -Wcast-align... yes
checking whether C compiler accepts -Wformat-nonliteral... yes
checking whether C compiler accepts -Wformat-security... yes
checking whether C compiler accepts -Wsign-compare... yes
checking whether C compiler accepts -Wstrict-aliasing... yes
checking whether C compiler accepts -Wshadow... yes
checking whether C compiler accepts -Winline... yes
checking whether C compiler accepts -Wpacked... yes
checking whether C compiler accepts -Wmissing-format-attribute... yes
checking whether C compiler accepts -Wmissing-noreturn... yes
checking whether C compiler accepts -Winit-self... yes
checking whether C compiler accepts -Wredundant-decls... (cached) yes
checking whether C compiler accepts -Wmissing-include-dirs... yes
checking whether C compiler accepts -Wunused-but-set-variable... yes
checking whether C compiler accepts -Warray-bounds... yes
checking whether C compiler accepts -Wreturn-type... yes
checking whether C compiler accepts -Wswitch-enum... yes
checking whether C compiler accepts -Wswitch-default... yes
checking whether C compiler accepts -Wduplicated-cond... no
checking whether C compiler accepts -Wduplicated-branches... no
checking whether C compiler accepts -Wlogical-op... no
checking whether C compiler accepts -Wrestrict... no
checking whether C compiler accepts -Wnull-dereference... yes
checking whether C compiler accepts -Wdouble-promotion... yes
checking whether C compiler accepts -Wnested-externs... yes
checking whether C compiler accepts -Wmissing-prototypes... yes
checking whether C compiler accepts -Wstrict-prototypes... yes
checking whether C compiler accepts -Wdeclaration-after-statement... yes
checking whether C compiler accepts -Wimplicit-function-declaration... yes
checking whether C compiler accepts -Wold-style-definition... yes
checking whether C compiler accepts -Wjump-misses-init... no
checking whether C compiler accepts -Wno-error=unused-parameter... yes
checking whether C compiler accepts -Wno-error=missing-field-initializers... yes
checking whether C compiler accepts -Werror=unknown-warning-option... (cached) yes
checking whether the linker accepts -Wl,--as-needed... yes
checking whether the linker accepts -Wl,--as-needed... yes
checking whether the linker accepts -Wl,-z,relro... yes
checking whether the linker accepts -Wl,-z,relro... yes
checking whether the linker accepts -Wl,-z,now... yes
checking whether the linker accepts -Wl,-z,now... yes
checking whether the linker accepts -Wl,-z,noexecstack... yes
checking whether the linker accepts -Wl,-z,noexecstack... yes
checking whether the linker accepts -Wl,--no-as-needed... yes
checking whether the linker accepts -Wl,--fatal-warnings... yes
checking whether the linker accepts -Wl,-fatal_warnings... no
checking whether the linker accepts -Wl,--no-as-needed... yes
./configure: 7076: %SED: not found
checking for library containing iconv... no
configure: error: "iconv is required for locale conversion"

pipes.c on  master [⇡]
✦ ❯ pkg search iconv
Checking availability of current mirror: ok
Sorting...
Full Text Search...
iconv/stable,now 1.16-3 aarch64 [installed]
  Utility converting between different character encodings

libiconv/stable,now 1.16-3 aarch64 [installed]
  An implementation of iconv()

libiconv-static/stable,now 1.16-3 aarch64 [installed]
  Static libraries for libiconv

The %SED error goes away when I replace the % with a $ in configure, but there's something wrong with the iconv error, as I've got iconv, libiconv, and libiconv-static installed. Build environment is Termux.

This is in a git branch because I extracted the release into my repo, autoconf-archive is unavailable in termux, so I can't generate the config myself anyways.