When using the supebuild for ParaView 5.9.0-RC1 on Redhat 7.8
there is an error when installing the superbuild built osmesa version, the installer is looking for python, python-config, and (maybe pydoc) but instead only has python3, python3-config, and pydoc3. A work around is to make the following symbolic links in the superbuild’s install bin directory
ln -s python3 python
ln -s python3-config python-config
ln -s pydoc3 pydoc
but this should either already be being done by the superbuild, or the install script should be changed to look for the versions with the number 3 in them.