[gentoo-dev] x32 release candidate

[Mike Frysinger <vapier@gentoo.org>]

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i'm pleased to announce the initial x32 release candidate:
http://dev.gentoo.org/~vapier/x32/stage3-amd64-x32-20120605.tar.xz

the x32 ABI is the default one, and includes x86/amd64 ABIs.  it is not using 
/lib32/ (and /lib is not a symlink) like our existing amd64 multilib as that 
is being phased out, and the x32 port allows me to do a clean break.

i call this a release candidate as it is using glibc-2.15 with backported 
patches.  the ABI however should be the same as glibc-2.16, so hopefully the 
upgrade will go smooth.  but i don't want to make an official release on the 
chance that things aren't smooth, so this is a release candidate.

once glibc-2.16 is released upstream, we should have x32 stages released 
alongside the existing x86/amd64 stages.

caveats:
 - you have to be running linux-3.4+ with the x32 ABI enabled in your config
 - the x32 profile has marked toolchain packages stable ahead of other arches:
	- linux-headers-3.4
	- binutils-2.22
	- glibc-2.15 (and will have stable glibc-2.16)
	- gcc-4.7.0
	- strace-4.7
	- gdb-7.4.1
 - gdb will probably be flaky, but the new gdb-7.5 release should address that

so if you try running stable amd64, you will hit some failures unrelated to 
x32, but related to the newer toolchain packages.  this will get better over 
time as other packages go stable, and i'll be trying to push at least 
binutils/linux-headers stable soonish.

for the adventurous souls, please review the existing x32 tracker bug:
	https://bugs.gentoo.org/show_bug.cgi?id=x32
and file new bugs for packages you come across that aren't yet known

more reading:
	https://sites.google.com/site/x32abi/
-mike

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