https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79947
--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> --- Created attachment 40976 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40976&action=edit Proposed patch to fix the problem The tARGET_RSQRTES macro needed a guard to require -mpowerpc-gfxopt.