ENH: Python2.3 closed the -undefined suppress and -flat_namespace hack loophole.
ENH: The problem is that python modules are MH_BUNDLEs by necessity, and that VTK
ENH: required the ability to link a previous python module by a subsequent one.
ENH: (Filtering needs Common, etc.) On OSX, you can't link MH_BUNDLEs, only
ENH: MH_DYLIBS. The solution has been to split each MH_BUNDLE so that the 'meat'
ENH: including the python wrapper code (indeed everything but the init function)
ENH: into a MH_DYLIB, and then make a MH_BUNDLE that links to the MH_DYLIB.
ENH: This allows the inter-module dependencies to be satisfied, and obviates the need
ENH: for the -undefined suppress hack.
ENH: These changes have been tested to be backwards compatible with previous versions
ENH: of CMake (linking the MH_BUNDLES with the -flat_namespace and -undefined suppress
ENH: flags makes no difference, it just isn't _required_ for it to build any longer),
ENH: and older versions (2.2) of Python. Everyone on OSX should use Python2.3, though,
ENH: since it is the first version that will actually build a Tkinter module without
ENH: being hacked.