Re: [PATCH] check_gcc for i386

[Jeff Garzik]

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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