CMake Error in CMakeLists\.txt:
  The COMPILE_FEATURES property of target "empty1" was evaluated when
  computing the link implementation, and the "CXX_STANDARD" was "98" for that
  computation\.  Computing the COMPILE_FEATURES based on the link
  implementation resulted in a higher "CXX_STANDARD" "11"\.  This is not
  permitted\.  The COMPILE_FEATURES may not both depend on and be depended on
  by the link implementation\.