https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103051
--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> --- Note that the -mcpu= in use can be set by compiler defaults as well (which can be set at build time, --with-cpu=), or commonly in RUNTESTFLAGS (to test a bunch of different -mcpu= settings at the same time, say).