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From: "Darren Pilgrim" <dmp@bitfreak.org>
To: "'Viatcheslav Fedorov'" <teodora@rambler.ru>
Date: Thu, 26 May 2005 00:22:16 -0700
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Cc: freebsd-stable@freebsd.org
Subject: RE: Building kernel, -mno-3dnow and stuff.
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From: Viatcheslav Fedorov
> 
> cc -O -pipe -march=pentiumpro -march=athlon-tbird 
> -I/<...cut...>  -mno-mmx -mno-3dnow -mno-sse -mno-sse2

These are disabled because they cause problems when used in the kernel.

> my ``/etc/make.conf'' file:
> -------------------------------------
> CPUTYPE=athlon-tbird
> CFLAGS= -O -pipe -march=pentiumpro
> COPTFLAGS= -O -fomit-frame-pointer -march=pentiumpro -pipe
> -------------------------------------

You should not put -march in your FLAGS variables.  CPUTYPE determines the
correct architecture- and processor-specific compiler flags.