Messages in this thread | | | Date | Thu, 25 Oct 2007 20:09:56 +0100 | From | "Michael Lothian" <> | Subject | Re: Possibility of adding -march=native to x86 |
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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?
Mike
On 25/10/2007, Adrian Bunk <bunk@kernel.org> wrote: > On Thu, Oct 25, 2007 at 07:33:35PM +0100, Michael Lothian wrote: > > Hi > > > > I was wondering if it was possible to add -march=native support to the > > processor options of the new x86 architecture if gcc 4.2 or greater is being > > used. > > > > I'm not suggesting this should be a default at all, merely an extra option > > similar to selecting P4, Athlon or even -Os. > > > > I've manually tried this flag at home with no ill effects. > > Selecting your CPU in the kernel configuration has more effects than > just setting the gcc flag, so it wouldn't gain you anything since you > anyway have to choose the correct CPU. > > > Mike > > 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/ > - 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/
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