Building kernel, -mno-3dnow and stuff.

Viatcheslav Fedorov nihrom at
Thu May 26 00:33:33 PDT 2005

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. 

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