https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58074
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> --- Created attachment 36370 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36370&action=edit patch for GCC 5 And a patch to add a -Wabi warning to GCC 5.
