https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65886
Bug ID: 65886
Summary: [5/6 Regression] External reference in PIE to DSO
created with -Wl,-Bsymbolic
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Copy relocation in PIE is incompatible with DSO created with -Wl,-Bsymbolic:
[hjl@gnu-tools-1 copyreloc-2]$ cat x.c
extern int a;
extern int *a_p (void);
extern void bar (void);
extern void *bar_p (void);
int main()
{
if (bar_p () != &bar)
__builtin_abort();
if (a_p () != &a)
__builtin_abort();
bar ();
if (a != 30)
__builtin_abort();
return 0;
}
[hjl@gnu-tools-1 copyreloc-2]$ cat bar.c
int a;
void
bar ()
{
a = 30;
}
void *
bar_p ()
{
return &bar;
}
int *
a_p ()
{
return &a;
}
[hjl@gnu-tools-1 copyreloc-2]$ make
/export/build/gnu/gcc-5/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-5/build-x86_64-linux/gcc/ -g -O2 -fPIE -c -o x.o x.c
/export/build/gnu/gcc-5/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-5/build-x86_64-linux/gcc/ -g -O2 -fPIC -c -o bar.o
bar.c
/export/build/gnu/gcc-5/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-5/build-x86_64-linux/gcc/ -Wl,-Bsymbolic -shared -o
libbar.so bar.o
/export/build/gnu/gcc-5/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-5/build-x86_64-linux/gcc/ -pie -o x x.o libbar.so
-Wl,-rpath,.
./x
Makefile:13: recipe for target 'all' failed
make: *** [all] Aborted (core dumped)
[hjl@gnu-tools-1 copyreloc-2]$
