message: Fetch some embeded libs if OS is not supported
diff: @@ -437,6 +437,11 @@ main()
  ;;
  *)
  echo "OS $ID not supported."
  + fetch_and_unpack_Catch2
  + fetch_and_unpack_fmtlib
  + fetch_and_unpack_gsl
  + fetch_and_unpack_yaml_cpp
  + fetch_and_unpack_range
  ;;
  esac
  