https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117023
--- Comment #1 from Joseph S. Myers <jsm28 at gcc dot gnu.org> --- It's not clear what "implement" means here. See the thread https://inbox.sourceware.org/gcc/375c5f62-dad4-4247-958c-57b230ae6...@oracle.com/T/#t