http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56375
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-02-18 16:17:35 UTC --- If you mean Joseph's http://sourceware.org/bugzilla/show_bug.cgi?id=6527 comment, then that is about _Decimal128, thus something not part of ISO C89 nor ISO C99.