From: Rich Felker <dalias@aerifal.cx>
Date: Tue, 24 Jan 2012 05:22:27 +0000 (-0500)
Subject: make gcc wrapper support -shared correctly
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=b768c7bc6398e297945b08dd5315cae472279a3a

make gcc wrapper support -shared correctly

it was previously attempting to link start files as part of shared
objects. this is definitely wrong and depending on the platform and
linker could range from just adding extraneous junk to introducing
textrels to making linking fail entirely.
---

diff --git a/tools/gen-musl-gcc.sh b/tools/gen-musl-gcc.sh
index 1ef0550f..edc40846 100644
--- a/tools/gen-musl-gcc.sh
+++ b/tools/gen-musl-gcc.sh
@@ -29,6 +29,7 @@ for i ; do
 case "$skip$i" in
 -I|-L) skip=--- ; continue ;;
 -[cSE]|-M*) nolink=1 ;;
+-shared) nocrt=1 ;;
 -*) ;;
 *) havefile=1 ;;
 esac
@@ -37,13 +38,17 @@ done
 
 [ "$havefile" ] || nolink=1
 
+[ "$nolink" ] && nocrt=1
+
+[ "$nocrt" ] || set -- "$libc_start" "$libc_crt" "$@" "$libc_end" \
+
 [ "$nolink" ] || {
 tmp_specs=$HOME/.specs.tmp.$$
 printf '*link_libgcc:\n\n\n' > "$tmp_specs" || exit 1
 exec 3<"$tmp_specs"
 rm -f "$tmp_specs"
-set -- -specs=/proc/self/fd/3 "$libc_start" "$libc_crt" "$@" "$libc_end" \
-  -Wl,--start-group -lc -lgcc -lgcc_eh -Wl,--end-group \
+set -- -specs=/proc/self/fd/3 "$@" \
+  -Wl,--as-needed -Wl,--start-group -lc -lgcc -lgcc_eh -Wl,--end-group \
   -Wl,-dynamic-linker,"$ldso_pathname" -Wl,-nostdlib
 }