Tell CMake where to find the compiler by setting either the environment variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path to the compiler, or to the compiler name if it is in the PATH.
-- Configuring incomplete, errors occurred! See also "/builds/mattia.basaglia/Qt-Color-Widgets/build/CMakeFiles/CMakeOutput.log". See also "/builds/mattia.basaglia/Qt-Color-Widgets/build/CMakeFiles/CMakeError.log". ERROR: Job failed: exit code 1