https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64008
--- Comment #6 from Oleg Endo <olegendo at gcc dot gnu.org> --- Ah, ancient issue is ancient: Here it starts: https://gcc.gnu.org/ml/gcc/2003-07/msg01851.html Still, I think Segher has a point in comment #4. Why not just enable all the multilibs for any configuration? At least it would be a friendly default value. If users don't want that (space limitations?), they can still disable it with --disable-multilib.