On Tue, Jun 29, 2010 at 8:09 PM, Beau Henderson <b...@thehenderson.com> wrote: > On 06/30/10 08:07, Paul Hartman wrote: >> >> 2010/6/29 Hasan SAHIN<hasan.sa...@gmx.com>: >>> >>> Hello all, >>> >>> I am using Athlon64 X2 processor with the >>> CFLAGS="-march=k8 -O2 -pipe -fomit-frame-pointer" option. >>> >>> Can I use the -march=native option instead of that? >> >> You can see which options -march=native would use by running this command: >> >> gcc -Q --help=target -march=native >> >> (thanks to Daniel Iliev for the tip) >> > > Perhaps I'm missing something but running the above gives me the impression > that -march=native actually only configures the bare minimal install. I'm > not seeing -mmmx or -msse3 enabled on my k8-sse3 for instance ( amongst much > else ).
What -march setting is it showing in that output? The MMX (etc) may be enabled implicitly instead of explicitly. It's also possible that the CPU detection is failing to identify your CPU. In that case you could probably file a bug report about it.
