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
    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/

    \
     
     \ /
      Last update: 2007-10-25 21:13    [W:0.025 / U:33.904 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site