https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77924
--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> --- Created attachment 39784 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39784&action=edit Proposed patch to fix the problem This patch should only create the __ibm128 type when long double == IEEE and long double size is 128 bits, so it should allow AIX to build (AIX long double is 64-bits).