http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59136
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Patches have been posted, but haven't been reviewed yet. http://gcc.gnu.org/ml/gcc-patches/2013-12/msg00558.html http://gcc.gnu.org/ml/gcc-patches/2013-12/msg00964.html Various tsan testcases right now fail because it isn't in.