Ok thanks! But now I get:

CMake Error at CMakeLists.txt:25 (find_package): By not providing "FindKDecoration2.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "KDecoration2", but CMake did not find one. Could not find a package configuration file provided by "KDecoration2" with any of the following names: KDecoration2Config.cmake kdecoration2-config.cmake Add the installation prefix of "KDecoration2" to CMAKE_PREFIX_PATH or set "KDecoration2_DIR" to a directory containing one of the above files. If "KDecoration2" provides a separate development package or SDK, be sure it has been installed.