Add VTK_USE_COCOA and VTK_USE_X to VTK config file
When building LookingGlassVTKModule externally (thanks to PR Kitware/LookingGlassVTKModule#9, it fails to include vtkCocoaLookingGlassRenderWindow.mm
and vtkCocoaLookingGlassRenderWindow.h
(see here and issue KitwareMedical/SlicerLookingGlass#2)
Moving forward, I would like to expose option like VTK_USE_COCOA
and VTK_USE_X
into a config file.
What is the CMake equivalent of vtkRenderingOpenGLConfigure.h
?