message: ENH: Enabled color ouput when using ninja.
diff: @@ -161,6 +161,12 @@ blt_append_custom_compiler_flag(FLAGS_VAR CMAKE_CXX_FLAGS_DEBUG
  CLANG "-fstandalone-debug"
  )
  +blt_append_custom_compiler_flag(FLAGS_VAR CMAKE_CXX_FLAGS
  + DEFAULT " "
  + GNU "-fdiagnostics-color=always"
  + CLANG "-fcolor-diagnostics"
  + )
  +
  # message(STATUS "Custom compiler flags:")
  # foreach(flag ${custom_compiler_flags_list})
  