On Thu, Oct 25, 2007 at 10:30:09PM +0100, Michael Lothian wrote:
> On 25/10/2007, Gabriel C <[EMAIL PROTECTED]> wrote:
> > 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
> >
> Yes for something like a distro kernel it is bad but as I said before
> this isn't what this is for.
>
> Eventually it would be nice to to a make localkernel and for a
> customised kernel to be build compiling in all pci / pci express
> drivers into the kernel and all usb devices as modules.
>
> Auto magically detecting the cpu would be part of that
>
> I hate getting a new piece of kit and then have to figure out from
> lspci which options need to be turned on and the the really iritation
> part of finding the option in make menuconfig
What exactly is irritating?
Please name the problems so that they can be fixed.
> Detecting the cpu and using march=native could be all part of that
You don't need march=native for this.
You have to set the right config option for your CPU and you
automatically get the right compiler options.
> 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
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