http://sourceware.org/bugzilla/show_bug.cgi?id=13244
--- Comment #2 from hubicka at ucw dot cz 2011-10-06 18:45:42 UTC ---
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> cat t.c
extern __attribute__ ((visibility("hidden"))) int fooblah;
static
do_nothing (int param)
{
if (param)
fooblah = 1;
}
main()
{
do_nothing (0);
}
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> ./xgcc -B ./ -O2 t.c
-fno-early-inlining -flto -fuse-linker-plugin
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> ./xgcc -B ./ -O2 t.c
-fno-early-inlining -flto -fuse-linker-plugin --shared
/abuild/jh/trunk-install/x86_64-unknown-linux-gnu/bin/ld: a.out: hidden symbol
`fooblah' isn't defined
/abuild/jh/trunk-install/x86_64-unknown-linux-gnu/bin/ld: final link failed:
Bad value
collect2: error: ld returned 1 exit status
With gold I get:
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> ./xgcc -B ./ -O2 t.c
-fno-early-inlining -flto -fuse-linker-plugin --shared
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc>
because fooblah gets optimized out.
Honza
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