[gentoo-releng] NPTL and 2006.0

[Chris Gianelloni]

Alright, so I'm guessing that we're going with NPTL for 2006.0, except
on arches where the arch team has determined that it isn't stable, or
that doesn't have a stable 2.6 headers/kernels.

Here's what I've done for x86, and I really encourage all of you to
follow suit.

I've created a no-nptl sub-profile that has "nptl nptlonly" in use.mask,
along with a 2.4 sub-profile.  This 2.4 sub-profile will be *the* 2.4
sub-profile for x86, with the other 2.4 profiles being deprecated.  I
have added "nptl" to USE for the 2006.0 profile, and *not* for the "x86"
profile.  Also, because x86 supports 2.4-based systems, I have *not*
added STAGE1_USE="nptl".  If your architecture is on 2.6-only, then you
are free to add this to your profile.  I highly recommend *against*
adding nptlonly to STAGE1_USE or USE at this time.  I have also
minimized the USE flags enabled in the default-linux/x86 profile.  This
makes the profile very usable for non-release sub-profiles, by limiting
the number of USE someone is forced to disable.  All of the other USE
flags are enabled in the sub-profiles for each release.

So... there's my "lead by example" so much as it applies.  Feel free to
make any arch-specific changes you wish to your own profiles, but I've
given you what I plan on doing on x86 for the future.

-- 
Chris Gianelloni
Release Engineering - Strategic Lead
x86 Architecture Team
Games - Developer
Gentoo Linux