lp:~metacollin/kicad/osx_distribution

This makes some minor changes to the build system that improves binary-compatibility across a wide number of OS X versions. This makes no changes to building LOCALLY, but instead is intended for situations where one wants to generate a binary .app bundle suitable for public distribution.

Applications that have python scripting Cocoa API elements (like KiCad with python scripting enabled, even if wxPython is in between) must include their own embedded python framework and interpreter for stability and security reasons, and for this reason, Python has been removed entirely from the OS X SDK versions 10.9 and onward.

Additionally, certain PPC specific architecture options have been removed, as the last OS X version to support PPC binaries was 10.4u. This branch can be made to work with as early as 10.6, but in its current form, it only works with 10.7-10.10, as using 10.6 requires some changes that negatively impact later versions.

Usage steps (will be in a script soon enough):

1. Download the Python 2.7.9 source code.
2. Make and install Python 2.7.9 somewhere easy to point KiCad's build system at, make sure MACOSX_DEPLOYMENT_TARGET=10.x environment variable is set. I use 10.7.
3. You should have a Python.framework and bin directory in that folder. cd to Python.framework/Versions/2.7/
4. chmod +w Python
5. install_name_tool -id @executable_path/../Frameworks/Python.framework/Versions/2.7/Python Python
6. chmod -w Python
7. cd to Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS
8. use otool -L Python and find the Python link path. then do install_name_tool -change <path you found with otool -L> @executable_path/../Frameworks/Python.framework/Versions/2.7/Python Python
9. Great! The framework is ready. Now build wx/wxPython, with a 5th new argument in the osx_build_wx script which is the path to the python interpreter. Pass it the path to the folder that contains your python Framework, that you built, but bin/python in that folder.

10. Finally, when building kicad, set the -PYTHON_EXECUTABLE and PYTHON_LIBRARY CMake paths to <framework path>/bin/python and <framework path>/Python.framework/Versions/2.7/Python respectively. Also, enabled KICAD_NEW_BOOST.

11. Go eat a sandwich while a nice, correctly bundled boost and python that will work on multiple versions of OS X without issue has built! Yay!