Compilation error with Python3.7 and PARAVIEW_USE_UNIFIED_BINDINGS=true

Error compiling vtkRenderingContextOpenGL2CSInit.cxx. PyImport_AppendInittab signature changed with python 3 and it expects now a PyObject* as second argument (instead of void)

log: python3unifiedCompileError.log

system info: archlinux, gcc 8.2.0, python 3.7.0, cmake 3.11.4

Note that I had to fix vtkClientServerInterpreter.cxx:197 as PyString_AsString return now a const char* (instead of char*.)

PS: I'm not really sure of what does the cmake option PARAVIEW_USE_UNIFIED_BINDINGS but it is set to true when exporting the Essentials Enable-Python catalyst edition.