Messages in this thread | | | Date | Tue, 23 Nov 2004 12:19:08 +0000 | From | P@draigBra ... | Subject | Re: Stupid question |
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Nix wrote: > 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.)
I added those in so that they were explicit. They do no harm. I had a version that didn't print these redundant options but got many requests about whether they were needed. You can't win.
Pádraig. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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