http://sourceware.org/bugzilla/show_bug.cgi?id=12942
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
CC| |amodra at gmail dot com
Version|unspecified |2.22 (HEAD)
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2011-06-28 17:29:31
UTC ---
Here is the real testcase:
[hjl@gnu-6 pr12942]$ cat a.h
extern void link_error ();
inline int test (void)
{
int exp = -1;
if ((exp < 2 ? 2U : (unsigned int) exp) != 2)
link_error ();
return 0;
}
typedef int (*test_t) (void);
[hjl@gnu-6 pr12942]$ cat a.cc
#include "a.h"
extern "C" void abort ();
test_t b(void);
int
main(void)
{
if (test != b ())
abort ();
}
[hjl@gnu-6 pr12942]$ cat b.cc
#include <stdio.h>
#include "a.h"
test_t b(void)
{
return test;
}
[hjl@gnu-6 pr12942]$ make
/export/build/gnu/gcc/build-x86_64-linux/gcc/../../release/usr/gcc-4.7.0/bin/g++
-flto -c -o a.o a.cc
/export/build/gnu/gcc/build-x86_64-linux/gcc/../../release/usr/gcc-4.7.0/bin/g++
-c -o b.o b.cc
/export/build/gnu/gcc/build-x86_64-linux/gcc/../../release/usr/gcc-4.7.0/bin/g++
-O2 -flto -fuse-linker-plugin -B./ -o x a.o b.o
b.o: In function `test()':
b.cc:(.text._Z4testv[test()]+0x16): undefined reference to `link_error()'
collect2: error: ld returned 1 exit status
make: *** [x] Error 1
[hjl@gnu-6 pr12942]$
Gold works fine. The problem is BFD linker failed to pick the
correct definition.
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