[patch] add apple specific i386 cpu

[Joseph S. Myers]

On Tue, 5 Jun 2007, H. J. Lu wrote:

> > Adding machinery to default to different -march depending on presence of
> > -m64 don't seem to be that big deal either.
> > 
> 
> I prefer this solution with something like
> 
> ../configure --with-cpu-32=xxx --with-arch-32=xxx --with-cpu-64=xxx --with-arch-64=xxx

I have patches that do something like this (option spellings --with-arch64 
etc.) for MIPS and Power (but not IA32), but they'd need cleaning up for 
FSF submission to be correct for both 32-bit and 64-bit defaults, and such 
changes are effectively independent for each target.

The basic principle of such changes is obvious:

  { "cpu64", "%{m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }

or similar in OPTION_DEFAULT_SPECS, and the obvious changes to config.gcc, 
but "m64" needs to be "!m32" when defaulting to 64-bit.

-- 
Joseph S. Myers
joseph@codesourcery.com