Create _nnpy module out-of-line and use it

generate.py

@@ -51,17 +51,22 @@ def symbols(ffi):
 
     return '\n'.join(lines) + '\n'
 
-def run():
+def create_module():
 
     hfiles = header_files()
-    headers = functions(hfiles)
+    del hfiles['ws.h'] # due to https://github.com/nanomsg/nanomsg/issues/467
+
     ffi = FFI()
-    ffi.cdef(headers)
+    ffi.cdef(functions(hfiles))
+    ffi.set_source('_nnpy', '\n'.join('#include <%s>' % fn for fn in hfiles),
+                   libraries=['nanomsg'], include_dirs=INCLUDE)
+    return ffi
 
-    with open('nnpy/nanomsg.h', 'w') as f:
-        f.write(headers)
+def run():
+    ffi = create_module()
     with open('nnpy/constants.py', 'w') as f:
         f.write(symbols(ffi))
+    ffi.compile()
 
 if __name__ == '__main__':
     run()

nnpy/__init__.py

@@ -1,13 +1,5 @@
 from .constants import *
-from cffi import FFI
+from _nnpy import ffi, lib as nanomsg
 import os
 
-HERE = os.path.dirname(__file__)
-
-ffi = FFI()
-with open(os.path.join(HERE, 'nanomsg.h')) as f:
-    ffi.cdef(f.read())
-
-nanomsg = ffi.dlopen('nanomsg')
-
 from .socket import Socket