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Date: Fri, 26 Jan 2007 22:20:48 -0500
From: Mike Jakubik <mikej@rogers.com>
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To: "Chris H." <chris#@1command.com>
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Cc: freebsd-stable@freebsd.org
Subject: Re: Why does FBSD always assume it's on an 8080 CPU?
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Chris H. wrote:
>
> CPU: AMD Athlon(tm) XP (1102.51-MHz 686-class CPU)
> Origin = "AuthenticAMD"  Id = 0x680  Stepping = 0
> Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE> 
>
> AMD Features=0xc0400800<SYSCALL,MMX+,3DNow+,3DNow>
>
> That I simply build world/kernel with an clean (empty) make.conf
> and add the following during port(s) building to attain optimum results
> given my CPU for this current biuld?
>
> CPUTYPE?=pentium4
>
> COPTFLAGS= -march=pentium4 -mmmx -m3dnow -m3dnow+ -msse -msse2

Why are you using "pentium4" with an Athlon XP CPU? use "athlonxp" 
instead. Also, don't modify the COPTFLAGS.