http://sourceware.org/bugzilla/show_bug.cgi?id=13230
Bug #: 13230
Summary: IRONLY_EXP incorrectly reported as IRONLY by gold when
fat LTO files are used
Product: binutils
Version: 2.23 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
This requires GCC patch to use new plugin interface. But the problem seems
quite clear. Gold is confusing reference from discarded section of fat LTO
object with real reference to the comdat symbol.
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> ./xgcc -B ./ -O2 t.o -flto
--save-temps
[Leaving LTRANS /tmp/cczdYmCj.args]
[Leaving LTRANS /tmp/ccCqokiD.ltrans.out]
[Leaving LTRANS /tmp/ccLoaOjG.args]
[Leaving LTRANS /tmp/ccCqokiD.ltrans0.o]
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> cat t.C
#include <stdio.h>
inline void test (void)
{
printf("Do something\n");
}
void *optimize_me_away_at_lto = (void *)&test;
main ()
{
test();
}
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> ./xgcc -B ./ -O2 t.C -flto
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> ./xgcc -B ./ -O2 t.o -flto
--save-temps
[Leaving LTRANS /tmp/ccURJfxM.args]
[Leaving LTRANS /tmp/ccJTd7um.ltrans.out]
[Leaving LTRANS /tmp/ccvoyXEC.args]
[Leaving LTRANS /tmp/ccJTd7um.ltrans0.o]
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc> more t.res
1
t.o 2
171 4348d11c PREVAILING_DEF_IRONLY _Z4testv
177 4348d11c PREVAILING_DEF main
jh@evans:/abuild/jh/trunk-3/build-inst7/gcc>
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