[zeromq-dev] pyzmq: using libzmq functions from cython

[Tom Farnbauer]

I'm pretty certain that I'm importing zmq first and it loads just fine.
Then once I try to import my stuff, it fails and tells me that:

ImportError: libzmq.so: cannot open shared object file: No such file or
directory

One interesting thing I noticed is that when I run `ldd <any one of pyzmq
backend extensions>` libzmq.so is not in the output. It is however listed
when I run it on my own extension module. This happens even if I link
specifically against the libzmq instance that is bundled with zmq. I've
tried playing around with different dlopen settings to no avail (based on
this old info here:
http://muttley.hates-software.com/2006/01/25/c37456e6.html). It appears
that python doesn't use RTLD_GLOBAL by default, but trying to force it
(through sys.setdlopenflags) didn't help...

If I add the zmq package directory to LD_LIBRARY_PATH, it works just fine.
I'm trying not to have to gdb it but I just may have to.

The code in question is here:
https://github.com/SleepingPills/splice.io/blob/master/splice/receiver.pyx(warning:
it is fairly hacky at the moment)
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