Re: [gentoo-user] Hardware upgrade and Gentoo

[Daniel da Veiga]

On 7/18/07, Neil Bothwick <neil@××××××××××.uk> wrote:
> On Wed, 18 Jul 2007 19:49:00 +0200, Alex Schuster wrote:
>
> > Another method, which I would use, would be to change your CFLAGS to
> > what you would like for the new processor, but use mtune= instead of
> > march=. This will also optimize for the cpu, but the code will run on
> > any x86 CPU. emerge world --emptytree to re-compile everything, then
> > switch your hardware.
>
> Recompiling everything is unnecessary, you only need to recompile those
> packages that are necessary to get your system booting with the new
> hardware. emerge -e system should do that, along with recompiling the
> kernel. As long as you have a working toolchain, you can then recompile
> anything important to you that fails to work on the new hardware before
> resetting the CFLAGS and doing a background emerge -e world while getting
> on with whatever you use the computer for.
>
> Don't forget to set PORTAGE_NICENESS in make.conf before you emerge -e
> world.
>

I have read some docs that suggest what Mike said could happen to me,
because some intructions set are not compatible,  along with Neil
suggestion and Alex advice, I decided to recompile "system" with the
new "-mtune" instead of "-march" tonight. I'll just see if it works by
simply booting the new hardware and starting tunning.

If something goes wrong, I can always go with Neil and Dale suggestion
and start fresh, get /etc and /home, along with the world file, and
let portage do the hard work.

-- 
Daniel da Veiga
Computer Operator - RS - Brazil
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