Messages in this thread | | | Subject | Re: Stupid question | From | Nix <> | Date | Tue, 23 Nov 2004 12:08:00 +0000 |
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On 23 Nov 2004, Gene Heskett yowled: > On Monday 22 November 2004 09:32, P@draigBrady.com wrote: >>Gene Heskett wrote: >>> Greetings; >>> >>> Silly Q of the day probably, but what do I set in a Makefile for >>> the -march=option for building on a 233 mhz Pentium 2? >> >>http://www.pixelbeat.org/scripts/gcccpuopt > > Thanks very much. Obviously someone else needed to scratch this itch > too. This should produce the correct results when running on the > target machine. Here, it produces this: > [root@coyote CIO-DIO96]# sh ../gcccpuopt > -march=athlon-xp -mfpmath=sse -msse -mmmx -m3dnow
... which is peculiar, as -mmmx -msse is redundant, as is -mmmx -m3dnow, and all three of those flags are the end are implied by -march=athlon-xp anyway.
(-mfpmath=sse *is* useful on non-64-bit platforms, though.)
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