Thanks mark - if POSIX semaphores aren't available, we're largely dead-
on-arrival. I thought FBSD was at the point of enabling them by default
- boo on me. See also: http://bugs.python.org/issue3770#msg73958 and
http://bugs.python.org/issue3770#msg83495 - with martin's help last
pycon I cut a lot of the "HAVE_BROKEN..." values to autoconf checks in
configure.in.
I think the right way (however unpleasant) is to check to see if we have
POSIX semaphores, period - if we don't, _multiprocessing should just not
compile.