Building kernel, -mno-3dnow and stuff.

[Viatcheslav Fedorov]

From: "Darren Pilgrim"

>> 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.

Thanks a lot. Now it's clear to me.