That line is only required on the top level CMakeLists.txt. Are you you are selecting the absolute top directory as the source dir in CMake Windows GUI (which I assume you are using)? Not the src subdirectory or anything else, but the root dir?
That line is only required on the top level CMakeLists.txt. Are you you are selecting the absolute top directory as the source dir in CMake Windows GUI (which I assume you are using)? Not the src subdirectory or anything else, but the root dir?