http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49033
--- Comment #2 from Arthur O'Dwyer <arthur.j.odwyer at gmail dot com> 2011-05-18 01:19:22 UTC --- (In reply to comment #1) > -march=native is useless. Please show outputs from > > # gcc -w -std=c99 -O3 -march=native -fcheck-data-deps test891883150.c -v > # cat /proc/cpuinfo I could have sworn I already attached the output from gcc -v! But I'll try it again, once I finish rebuilding.