[zeromq-dev] cmake support.

[Martin Sustrik]

George,

> Well, I had a couple of hours tonight, it doesn't look like any of the
> platform checks (headers/functions) are in use anywhere!
> 
> The only ones I see in use are the ZMQ_HAVE_<PLAT> defines, is that correct?

Yes, we've opted to make 0MQ core build dependent on a single parameter 
- platform name. The goal is to keep build as simple and as predictable 
as possible.

However, there are some specific checks for add-on components like java 
extension, python extension, videoconferencing example etc.

HTH
Martin