I thought Qt5.6 was the minimum required? Just asking. I don't care that much but I need to install Qt5.7 , which of course I can do.
when running CMake on kwin I get: CMake Error at CMakeLists.txt:20 (find_package): Could not find a configuration file for package "Qt5" that is compatible with requested version "5.7.0". The following configuration files were considered but not accepted: /usr/lib64/cmake/Qt5/Qt5Config.cmake, version: 5.6.2