bindings, build: fix bindings and visualizer build

Includes:
- scan python scripts
- run python scripts from ns3
- replace visualizer file copy with configure_file to prevent cmake refreshes
- replace ns__init__.py file copy with configure_file to prevent cmake refreshes
- fix bindings scanning with cmake
- pass include directories to modulegen for castxml consumption
- add missing parameters of Recv in python-unit-tests.py
- change apiscan targets from apiscan-module to libmodule-apiscan
- change bindings targets from module-bingings to libmodule-bindings
- scanning and bindings build tests
- scan scratch python scripts
- replace FindPython3 with FindPython to be compatible with CMake 3.10
- do not export private visual-simulator-impl.h
- do not export udp-socket-impl.h
- use .so suffix for bindings on Mac instead of .dylib

utils/python-unit-tests.py

@@ -1,3 +1,5 @@
+#! /usr/bin/env python3
+
 # Copyright (C) 2008-2011 INESC Porto
 
 # This program is free software; you can redistribute it and/or modify
@@ -25,6 +27,8 @@ import ns.mobility
 import ns.csma
 import ns.applications
 
+UINT32_MAX = 0xFFFFFFFF
+
 
 ## TestSimulator class
 class TestSimulator(unittest.TestCase):
@@ -170,7 +174,7 @@ class TestSimulator(unittest.TestCase):
             @return none
             """
             assert self._received_packet is None
-            self._received_packet = socket.Recv()
+            self._received_packet = socket.Recv(maxSize=UINT32_MAX, flags=0)
 
         sink = ns.network.Socket.CreateSocket(node, ns.core.TypeId.LookupByName("ns3::UdpSocketFactory"))
         sink.Bind(ns.network.InetSocketAddress(ns.network.Ipv4Address.GetAny(), 80))