[PATCH] Export AT_HWCAP from libc, v4

[David Miller]

From: Richard Henderson <rth@redhat.com>
Date: Thu, 17 May 2012 09:44:50 -0700

>     I'm just about convinced it's much more useful to extend Dave's Sparc
>     IFUNC trick to "all" targets.  I will attempt to measure this overhead
>     before I formally propose such a patch.

If you do this, I would suggest passing the hwcaps as a uint64_t.  I
already know that on sparc I'm very likely to have more than 32 hwcap
bits very soon :-/