http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52973
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2012-06-01
21:36:35 UTC ---
The bug here is that we aren't applying the visibility attribute to b until
after we've decided that a<b> is hidden because b is hidden. Changing the code
to
template <class T> class __attribute__((visibility("default"))) a
{
public:
/* A */ static int c;
};
class __attribute__((visibility("default"))) b;
class b: a <b> {};
template<> /* B */ int a<b>::c = 0;
works around the issue.
