Move to cythonize for extension.

setup.py

@@ -9,6 +9,7 @@
 try:
     from Cython.Distutils import build_ext
     from Cython.Distutils.extension import Extension
+    from Cython.Build import cythonize
     cython_available = True
 except ImportError, e:
     pass
@@ -32,8 +33,7 @@ def get_ext_modules():
     except ImportError, e:
         print 'WARNING: pyzmq(==2.2.0) must be installed to build cython version of gevent-zeromq (%s).' % e
         return []
-
-    return [Extension('gevent_zeromq.core', ['gevent_zeromq/core.pyx'], include_dirs=zmq.get_includes())]
+    return cythonize([Extension('*', ['gevent_zeromq/*.pyx'], include_dirs=zmq.get_includes())])
 
 class TestCommand(Command):
     """Custom distutils command to run the test suite."""