http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59364
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I thought I've commented on this, perhaps in other PR, but can't find it right now. The link error disappeared with r199577, which certainly doesn't seem to be backportable nor a change with the intent to fix this, and furthermore, I'd say that for such a trivial (sure, not in C++ terminology) ctor we'd better not to require dynamic initialization of the TLS var.
