AIX atomicity.h support

[Geoff Keating]

> Date: Tue, 26 Sep 2000 09:36:24 -0700 (PDT)
> From: Benjamin Kosnik <bkoz@redhat.com>

> What toolchain are you using on AIX? I've never had much luck getting a
> functional g++/ld combo. 

The one we shipped to IBM is as good as I know how to make it (there's
still a problem with static templated variables, but I don't know how
to fix it in the context of XCOFF).

This was using the native linker.  There's no functioning GNU linker
yet, and I see no reason why a GNU linker would behave any differently
to the AIX linker (except, of course, for all the AIX linker features
it won't support).

The sourceware g++ should be about as good, except for the usual
CVS breakage.

-- 
- Geoffrey Keating <geoffk@cygnus.com>