linux-kernel - Re: Possibility of adding -march=native to x86

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Message-ID: <4720FF2B.9020802@googlemail.com>
Date:	Thu, 25 Oct 2007 22:40:11 +0200
From:	Gabriel C <nix.or.die@...glemail.com>
To:	Michael Lothian <mike@...eburn.co.uk>
CC:	Adrian Bunk <bunk@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: Possibility of adding -march=native to x86

Michael Lothian wrote:
>> The MPENTIUM4 option does not only set -march=pentium4, it also enables
>> several other options in arch/i386/Kconfig.cpu resulting in better
>> performance.
> 
> How about an autodetect to set the right options here too using cpuid?
> 
> With a warning of course that the code produced will be specifically
> for the native cpu that it's compiled on.

And kill off all Distro kernels right ? IMO to set that auto magically is bad.

Regards,

Gabriel 

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