[Paraview] ParaView as ThirdParty

[Utkarsh Ayachit]

> (1) when selecting PARAVIEW_INSTALL_DEVELOPMENT_FILES, I must have
> PARAVIEW_ENABLE_PYTHON:BOOL=ON; otherwise I get build errors for missing
> libraries.

That sounds like a bug. Mind posting the error messages?

> (2) then after a successful build, I try to build my project against these
> ParaView/VTK libraries again; however, I get an error with
> vtkPVInitializePythonModules()

You should link with the library providing this function, as done in
ParaView/Applications/ParaView/CMakeLists.txt. Here's the relevant
code:

if (PARAVIEW_ENABLE_PYTHON)
  target_link_libraries(paraview
    LINK_PRIVATE vtkUtilitiesPythonInitializer)
endif()