From: Rene Rivera <grafikrobot@gmail.com>
Subject: [Boost-build] MacOSX universal builds implemented in BBv2.
After some back and forth between Mat and myself we have the basic
universal builds working
<http://svn.boost.org/trac/boost/changeset/41592>. This is just a first
attempt at this so expect universal builds to be more smoothly supported
in the future. But not the near future as we have to get 1.35 out the
door ;-)

Note that this may cause some ripples in testing results. So watch out
for any new errors and point them out ASAP. Preferably by posting a bug
in trac.