https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65222
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hjl.tools at gmail dot com, | |jakub at gcc dot gnu.org --- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- istanbul and shanghai don't seem to be valid -march=/-mtune= options. My understanding was that atom, core-avx2, core-avx-i, corei7, corei7-avx, slm are deprecated aliases (thus intentionally not documented) of bonell, haswell, ivybridge, nehalem, sandybridge, silvermont. Beyond that, knl is indeed not documented (should be fixed) and x86-64 (dunno).