Messages in this thread | | | Date | Thu, 25 Oct 2007 21:50:20 +0200 | From | Adrian Bunk <> | Subject | Re: 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/
| |