Revert "[cmake.cmake_config.h] make more sense"
Revert "[cmake.cmake_config.h] make more sense"

This reverts commit 505c6fbf9ecabbef3e116202703bed15502e71fd.

Did not work, still needs improvement overall!

renemilk/DUNE-Stuff,renemilk/DUNE-Stuff,renemilk/DUNE-Stuff