http://sourceware.org/bugzilla/show_bug.cgi?id=14698
Bug #: 14698
Summary: ar, nm and ranlib don't use gcc's liblto_plugin.so in
BINDIR/../lib/bfd-plugins automatically
Product: binutils
Version: 2.24 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: binutils
AssignedTo: unassig...@sourceware.org
ReportedBy: mar...@trippelsdorf.de
Classification: Unclassified
ar, nm and ranlib use the LLVMgold.so plugin automatically,
it it is found in BINDIR/../lib/bfd-plugins.
(/usr/x86_64-pc-linux-gnu/binutils-bin/lib/bfd-plugins on my system)
Unfortunately gcc's liblto_plugin is loaded automatically.
markus@x4 test % cat a.c
#include <stdio.h>
extern void foo1(void);
extern void foo4(void);
void foo2(void) {
printf("Foo2\n");
}
void foo3(void) {
foo4();
}
int main(void) {
foo1();
}
markus@x4 test % clang -flto -c a.c -o a.o
markus@x4 test % nm a.o
nm: a.o: File format not recognized
markus@x4 test % sudo cp /usr/local/lib64/LLVMgold.so
/usr/x86_64-pc-linux-gnu/binutils-bin/lib/bfd-plugins
markus@x4 test % nm a.o
U foo1
00000000 T foo2
00000000 T foo3
U foo4
00000000 T main
U printf
markus@x4 test % sudo rm
/usr/x86_64-pc-linux-gnu/binutils-bin/lib/bfd-plugins/LLVMgold.so
markus@x4 test % gcc -fno-fat-lto-objects -flto a.c -c -o a.o
markus@x4 test % nm a.o
0000000000000001 C __gnu_lto_slim
0000000000000001 C __gnu_lto_v1
markus@x4 test % sudo cp
/usr/libexec/gcc/x86_64-pc-linux-gnu/4.8.0/liblto_plugin.so.0.0.0
/usr/x86_64-pc-linux-gnu/binutils-bin/lib/bfd-plugins
markus@x4 test % nm a.o
0000000000000001 C __gnu_lto_slim
0000000000000001 C __gnu_lto_v1
It would output the following if the gcc lto-plugin would be loaded
automatically:
markus@x4 test % nm a.o
U foo1
00000000 T foo2
00000000 T foo3
U foo4
00000000 T main
A fix was posted at:
http://sourceware.org/ml/binutils/2012-10/msg00080.html
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