https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96791
--- Comment #20 from Segher Boessenkool <segher at gcc dot gnu.org> --- (In reply to Peter Bergner from comment #18) > So why don't we default to the Altivec ABI with -m32 on cpus that have > Altivec and VSX units??? History. I'm not sure all our ABIs are compatible with vectors enabled, either. Since always, you have needed to use -mabi=altivec on 32-bit.