FreeBSD 6.2, rebuild the system with CPUTYPE=prescott?

Garrett Cooper youshi10 at
Mon Jan 15 20:39:23 UTC 2007

John Nielsen wrote:
> On Monday 15 January 2007 14:42, Daniel Tourde wrote:
>> Hello,
>> Let me present myself:
>> - I am an advanced user of Gentoo Linux. I know quiet a lot about that
>> system and about how to optimize it to fit the hardware the best possible
>> way. - I am a casual FreeBSD user. I like it a lot though, it is lean and
>> very well structured.
>> I am the happy own of a Dell Inspiron 9400 with a Dual Core processor in it
>> (note, not a Dual Core 2).
>> gives some information about this
>> processor and about the parameter to give to gcc to obtain the best out of
>> it:
>> Intel Core Solo/Duo (Yonah)
>> vendor_id  : GenuineIntel
>>  cpu family  : 6
>>  model  : 14
>>  model name  : Genuine Intel(R) CPU       [Model] @ XXXGHz
>>  (the above info is from a T2400, other models may have different cpu
>> families and model numbers)
>> CHOST="i686-pc-linux-gnu"
>> CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer"
>> This is a 32bit chip
>> Note: It has been confirmed by at that prescott is the
>> correct microarchitecture to use with this CPU.
>> So now, I am trying to rebuild my FreeBSD 6.2 system playing a bit with the
>> parameters in the make.conf file (see /usr/share/examples/etc/make.conf) to
>> get the best out of my machine (double processor, MMX, SSE[1-3] and co...)
>> #CPUTYPE?=pentium3
>> #NO_CPU_CFLAGS=         # Don't add -march=<cpu> to CFLAGS automatically
>> #NO_CPU_COPTFLAGS=      # Don't add -march=<cpu> to COPTFLAGS automatically
>> So far, the only thing I did was to set CPUTYPE to pentium4 but I am pretty
>> sure, it can be done in a better way. The question being 'how?'
> "prescott" is listed as an option for CPUTYPE 
> in /usr/share/examples/etc/make.conf. So "CPUTYPE?=prescott" 
> in /etc/make.conf should do fine for you.
> JN
Another thread to read: 

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