Changing the default 32-bit x86 arch for Fedora 12 (#2)

[Dennis Gilmore]

On Wednesday 17 June 2009 05:00:38 pm Richard W.M. Jones wrote:
> On Wed, Jun 17, 2009 at 01:52:26PM -0400, Bill Nottingham wrote:
> > - Build all packages for i686 (this requires cmov)
>
> This cuts out AMD Geode ...
>
> and for what ...
>
> > 		P4 2.4Ghz	Athlon 3400+	Core2Duo E6850	Atom N270
> > march=i686/	-1.1%		+2.0%		+0.9%		+0.6%
> >  mtune=generic
> > march=i586/	+0.3%		-0.3%		-0.2%		+1.3%
> >  mtune=atom
> > march=i686/	-1.5%		+1.2%		+0.5%		+1.7%
> >  mtune=atom
>
> This just doesn't look worthwhile at all.
>
> My proposal is that we actually start to 'downgrade' x86, start
> compiling for baseline i386, and try to support people running Fedora
> on really old hardware, through projects like the Minimal Platform
> feature.
Sounds like a perfect target as a secondary arch.  there is no reason why we 
cant support the older hardware as a community based effort of those interested 
in it.  the primary arches are never going to satisfy everyone's itch  but we 
leave the door open to do it through initiatives like secondary arches.   The 
hardest part and the thing thats slowed things down so far is bootstrapping a 
new arch.  its much much simpler for a x86 based arch as there is a baseline 
already bootstrapped.


Dennis
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