https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64941
--- Comment #3 from Brian M <brian at soulspark dot org> --- I tried sussing the flags for my march and mtune native, but didn't have any luck (sorry, I'm mostly hardware, not software). The best I can do is tell you what processor I'm running: processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz