Re: [gentoo-user] which -march flag to pick for Intel Core 2 Duo in make.conf?

[Denis <denis.che@gmail.com>]

After reading some docs, the impression I get is that the 'nocona'
flag is for building a 64-bit system...  For a 32-bit system, it seems
like 'prescott' would be the choice, wouldn't it?

This from the GCC website about 4.2.0 release changes:

IA-32/x86-64

    * -mtune=generic can now be used to generate code running well on
common x86 chips. This includes AMD Athlon, AMD Opteron, Intel
Pentium-M, Intel Pentium 4 and Intel Core 2.
    * -mtune=native and -march=native will produce code optimized for
the host architecture as detected using the cpuid instruction.
    * Added a new command line option -fstackrealign and and
__attribute__ ((force_align_arg_pointer)) to realign the stack at
runtime. This allows functions compiled with a vector-aligned stack to
be invoked from legacy objects that keep only word-alignment.

We don't have gcc-4.2.0 in our portage available for installation yet,
do we?  Anyone know when?
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