Re: [gentoo-dev] auto selection of optimal gcc architecture settings

[Chris PeBenito <pebenito@gentoo.org>]

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On Mon, 2003-04-28 at 08:30, Mark Gordon wrote:
[cut]
> > >>I've been testing http://www.pixelbeat.org/scripts/gcccpuopt
> > >>over the last while with good results. Essentially it's
> > >>a Linux specific script that only helps on x86 at present
> > >>but can be updated to other architectures easily.
[cut]
> > >>It would be beneficial IMHO for gentoo to run it at
> > >>installation time and update /etc/make.conf appropriately?
[cut]
> It needs extending even for the x86 compatible world.
> 
> markg@brenda markg $ ./gcccpuopt 
>  -march=pentium2 -mmmx
[cut]

I think this would probably be more useful if it dumped out the CHOST
line in addition to the optimizations.  This would help with people that
have the more uncommon processors to set the correct CHOST.  I seen more
than a few times K6* users have had CHOST="i686-pc-linux-gnu", when it
should be i586-pc-linux-gnu.

so it'd print this for a K6-2:

$ ./gcccpuopt
CHOST="i586-pc-linux-gnu"
CFLAGS="-march=k6-2"


So it could easily be pasted into make.conf.  (-mmmx is redundant)

-- 
Chris PeBenito
<pebenito@gentoo.org>
Developer, Gentoo Linux
Hardened Gentoo Project
 
"Engineering does not require science. Science helps
a lot, but people built perfectly good brick walls
long before they knew why cement works."-Alan Cox

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