[zeromq-dev] platform checks.

[George Neill]

All,

  I see a potential (future?) problem in at least one spot in the
zeromq code base.  I have been looking at the ysemaphore.[ch]pp
ZMQ_HAVE_*  ifdefs and they seem to be disjoint, not to the point of
conflict ... but I spose' it could happen very easily.  I guess I had
expected to see the same ifdefs from the header wrapped around the
zmq::ysemaphore_t::signal() funcs in the .cpp.  Maybe a +1 for
platform feature tests?

Later,
George.