https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108182
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Even some -f options are mutlilib'ed. Eg.: cr16/t-cr16:MULTILIB_OPTIONS = fPIC mint32 And MIPS does EL/EB: mips/t-img-linux:MULTILIB_OPTIONS = mips64r6 mabi=64 EL So this is definitely a bad assumption.