Failing code:
template<typename CharT>
struct VisTest
{
inline VisTest ();
};
template<typename CharT>
inline VisTest<CharT>::VisTest()
{}
extern template class VisTest<char>; // It works if we drop that line
int some_function( int do_something ) __attribute__ ((visibility("default")));
int some_function( int do_something )
{
VisTest<char> a;
return 0;
}
g++ -fPIC -fvisibility=hidden -fvisibility-inlines-hidden lib.cpp -c
g++ -shared -fPIC -fvisibility=hidden -fvisibility-inlines-hidden lib.o -o
liblib.so
/usr/lib/gcc/x86_64-pc-linux-gnu/4.0.0/../../../../x86_64-pc-linux-gnu/bin/ld:
lib.o: relocation R_X86_64_PC32 against `VisTest<char>::VisTest()' can not be
used when making a shared object; recompile with -fPIC
/usr/lib/gcc/x86_64-pc-linux-gnu/4.0.0/../../../../x86_64-pc-linux-gnu/bin/ld:
final link failed: Bad value
collect2: ld returned 1 exit status
This happens with nearly all cases in which libstdc++ headers are involved:
http://bugs.gentoo.org/show_bug.cgi?id=78720
http://groups.google.de/groups?q=relocation+R_X86_64_PC32+against+making+a+shared+object&hl=de&lr=&selm=ct12kj%242njo%241%40FreeBSD.csie.NCTU.edu.tw&rnum=2
--
Summary: -fvisibility-inlines-hidden fails with gcc's extern
template extension on amd64
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: andreas dot pokorny at gmx dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: x86_64-pc-linux-gnu
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19664
