http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56557
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-03-12 08:19:28 UTC --- Wouldn't that mean that if you emit _ZTT* for the same class in multiple TUs in one shared library and the _ZTT* references these static _ZTC* symbols, that the construction vtables then couldn't be comdat and thus you'd have tons of copies of them, wasting .data space as well as dynamic relocations?