New gcc wrapper, take 3

[Rich Felker <dalias@aerifal.cx>]

[-- Attachment #1: Type: text/plain, Size: 409 bytes --]

Now updated to use -specs instead of extra wrapping layers with -B in
order to inhibit the default library paths. This version should be
faster, cleaner, and perhaps even more correct than the previous
attempts. I believe some of the other options could also be integrated
into the specs file passed in, and this might make things even cleaner
still.

Please test and let me know if there are problems.

Rich

[-- Attachment #2: my-musl-gcc --]
[-- Type: text/plain, Size: 1162 bytes --]

#!/bin/sh

gcc=gcc
libc_prefix="/usr/local/musl"
ldso_pathname="/lib/ld-musl-i386.so.1"
libc_lib=$libc_prefix/lib
libc_inc=$libc_prefix/include
libc_crt="$libc_lib/crt1.o"
libc_start="$libc_lib/crti.o"
libc_end="$libc_lib/crtn.o"

gcc_inc=$libc_inc
libgcc="$("$gcc" -print-file-name=libgcc.a)"
libgcc=${libgcc%/libgcc.a}

gccver=${libgcc##*/}
gcctarget=${libgcc%/*}
gcctarget=${gcctarget##*/}

case "$gccver" in
2.*|3.*|4.[01]*) ;;
*) nosp=-fno-stack-protector ;;
esac

[ "x$1" = "x-V" ] && { printf "%s: -V not supported\n" "$0" ; exit 1 ; }

for i ; do
case "$skip$i" in
-I|-L) skip=--- ; continue ;;
-[cSE]|-M*) nolink=1 ;;
-*) ;;
*) havefile=1 ;;
esac
skip=
done

[ "$havefile" ] || nolink=1

[ "$nolink" ] || {
tmp_specs=$HOME/.specs.tmp.$$
printf '*link_libgcc:\n\n\n' > "$tmp_specs" || exit 1
set -- -specs="$tmp_specs" "$libc_start" "$libc_crt" "$@" "$libc_end" \
  -Wl,--start-group -lc -lgcc -lgcc_eh -Wl,--end-group \
  -Wl,-dynamic-linker,"$ldso_pathname" -Wl,-nostdlib
}

set -- -std=gnu99 -nostdinc -nostdlib $nosp \
  -isystem "$libc_inc" -isystem "$gcc_inc" "$@" \
  -L"$libc_lib" -L"$libgcc"

"$gcc" "$@"

[ "$tmp_specs" ] && rm -f "$tmp_specs"