Messages in this thread | | | Date | Sat, 30 Aug 2003 20:47:55 -0400 | From | Jeff Garzik <> | Subject | Re: [PATCH] check_gcc for i386 |
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Alan Cox wrote: > On Sad, 2003-08-30 at 23:58, Marcelo Tosatti wrote: > >>> ifdef CONFIG_MPENTIUM4 >>>-CFLAGS += -march=i686 >>>+CFLAGS += $(call check_gcc,-march=pentium4,-march=i686) >>> endif >>> >>> ifdef CONFIG_MK6 >> >>OK, I forgot what that does. Can you please explain in detail what >>check_gcc does. > > > Tries to use gcc with the options given and if not falls back to the > second set suggested. So it'll try -march=pentium4 (new gcc) and > fall back to -march=i686
Yep. I introduced check_gcc into 2.4 (backported from 2.5), in fact.
The above change does exactly what Alan describes, and is a patch I was planning to submit myself :) I did not want to change compiler options at the time when I submitted the check_gcc patch, but after many months of manually patching to get the best compiler flags, it seems solid.
Jeff
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