How to fix: CMake Error Found relative path while evaluating include directories of

[ben.boeckel (Ben Boeckel (Kitware))]

Note that it is possible to vendor VTK (ParaView does it), but it is not as easy as add_subdirectory (and therefore FetchContent is not an option). Instead, ParaView “knows” what VTK does in various situations and uses its own CMake variables to control its build (e.g., VTK_USE_MPI is just set to the value of PARAVIEW_USE_MPI and not offered independently). VTK’s top-level CMakeLists.txt is set up to be the top-level and not designed to integrate as a component of another project.