Re: [gentoo-user] switching CPU's -- what strange things do I need?

[Ricardo Saffi Marques]

Well, I'd change my CFLAGS, for sure, so that I'd get all the benefits of
having that better processor. What's your profile: x86 or x86_64 (amd64)?

For your processor, according to http://gentoo-wiki.com/Safe_Cflags (that I
always like to check):

> Intel Core 2 Duo/Quad / Xeon 51xx/53xx
>
> vendor_id  : GenuineIntel
> cpu family  : 6
> model  : 15
> model name  : Intel(R) Core(TM)2 CPU XXXX @ XXXGHz
>
> *32 bit profile (x86)*
>
> CHOST="i686-pc-linux-gnu"
> CFLAGS="-march=prescott -O2 -pipe -fomit-frame-pointer"
> CXXFLAGS="${CFLAGS}"
>
> *64 bit profile (amd64)*
>
> CHOST="x86_64-pc-linux-gnu"
> CFLAGS="-march=nocona -O2 -pipe"
> CXXFLAGS="${CFLAGS}"
>
> *Note:*
>
>    - GCC 4.3 has -march=core2[1]<http://www.gnu.org/software/gcc/gcc-4.3/changes.html>,
>    but Gentoo has nothing above 4.2 in portage.
>
> So, I'd change my make.conf to one of those (again, depending of your
profile). And after that, even though some things may need a revdep-rebuild
and it may take a while, why not emerge -e world?

Regards,

Saffi


On 1/25/08, John covici <covici@××××××××××.com> wrote:
>
> Hi folks.  I right now have my CCFLAGS set to CFLAGS="-O2
> -mtune=athlon-xp -pipe" -- now I am getting one of those new Intel
> e8400 CPU's and so I have two questions.
>
> What should I change my CCFLAGS to -- and do I have to recompile the
> whole system after this is done or what?
>
> Thanks in advance for any assistance.
>
> --
> Your life is like a penny.  You're going to lose it.  The question is:
> How do
> you spend it?
>
>          John Covici
>          covici@××××××××××.com
> --
> gentoo-user@l.g.o mailing list
>
>


-- 
Ricardo Saffi Marques
Laboratório de Administração e Segurança de Sistemas (LAS/IC)
Universidade Estadual de Campinas (UNICAMP)
Cell: [phone]
Skype: ricardo_saffi_marques
Website: http://www.rsaffi.com