OSX default build setup broken in clean environment #31
Description
When running inside a clean, new virtualenv, setup.py fails to build the cython extensions for PyPylon.
(venv) ~/Work/Git/PyPylon$ python setup.py build
running build
running build_py
creating build
creating build/lib.macosx-10.12-x86_64-3.6
creating build/lib.macosx-10.12-x86_64-3.6/pypylon
copying pypylon/init.py -> build/lib.macosx-10.12-x86_64-3.6/pypylon
creating build/lib.macosx-10.12-x86_64-3.6/pypylon/cython
copying pypylon/cython/init.py -> build/lib.macosx-10.12-x86_64-3.6/pypylon/cython
running build_ext
cythoning cython/version.pyx to cython/version.cpp
building 'pypylon.cython.version' extension
creating build/temp.macosx-10.12-x86_64-3.6
creating build/temp.macosx-10.12-x86_64-3.6/cython
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers -I/Library/Frameworks/pylon.framework/Headers -I/Library/Frameworks/pylon.framework/Headers/GenICam -I/Users/rbendor/Work/Git/pynnacle/venv/lib/python3.6/site-packages/numpy/core/include -I/usr/local/Cellar/python3/3.6.2/Frameworks/Python.framework/Versions/3.6/include/python3.6m -c cython/version.cpp -o build/temp.macosx-10.12-x86_64-3.6/cython/version.o
cython/version.cpp:486:10: fatal error: 'pylon/PylonVersionNumber.h' file not found
#include "pylon/PylonVersionNumber.h"
^
1 error generated.
error: command 'clang' failed with exit status 1