we've had glibc-2.12 sitting in ~arch for long enough, and i think we've
gotten used to its new features where other packages break with it. looking
at the tracker bug #331665, all tracked issues have been closed out in at
least ~arch. so before i start plodding through the list, people are
encouraged to get things rolling themselves now.

if you have any such bugs, mark them as blocking #356913.
-mike