lkml.org 
[lkml]   [2007]   [Oct]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Possibility of adding -march=native to x86
On Thu, Oct 25, 2007 at 08:32:51PM +0100, Michael Lothian wrote:
> On 25/10/2007, Adrian Bunk <bunk@kernel.org> wrote:
> > On Thu, Oct 25, 2007 at 08:09:56PM +0100, Michael Lothian wrote:
> > > Actually I changed the Makefile.cpu and changed the -march to native
> > > which did slightly change the size of the kernel (slightly larger I
> > > think)
> > >
> > > So what else does that option change?
> >
> > Look at arch/i386/Kconfig.cpu
> >
>
> Can you be a bit more specific?

Let's make an example:

Consider you want to compile a kernel for your P4.

The MPENTIUM4 option does not only set -march=pentium4, it also enables
several other options in arch/i386/Kconfig.cpu resulting in better
performance.

cu
Adrian

--

"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-10-25 21:53    [W:0.054 / U:0.832 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site