https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89951
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> --- (In reply to Alexander from comment #4) > (In reply to Uroš Bizjak from comment #2) > > These two flags are irrelevant without -mavx. > > But, for example, when i build Qt5 gcc give error about these two > instructions. What kind of error? Can you please provide a test-case?