https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92514
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #7) > Please read: > https://gmplib.org/manual/Build-Options.html NOTE also if you compile GMP/MPF/MPC as part of the GCC build, it will do the correct thing and compile it for a generic cpu.