https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79965
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Harald Anlauf from comment #2) > (In reply to Andrew Pinski from comment #1) > > Your binutils does not support AVX-2 ... > > No, it does not. As I wrote, it's a dated machine. > > But for -march=core2 there should be no AVX instructions anyway. >!$omp declare simd(add) Causes all simd variants to be created IIRC.