message: parent_scope when setting variables in a function
diff: @@ -17,8 +17,7 @@ endfunction( add_GUDHI_PYTHON_lib )
  function( add_GUDHI_PYTHON_lib_dir THE_LIB_DIR )
  # deals when it is not set - error on windows
  if(EXISTS ${THE_LIB_DIR})
  - set(GUDHI_PYTHON_LIBRARY_DIRS "${GUDHI_PYTHON_LIBRARY_DIRS}'${THE_LIB_DIR}', ")
  - message("add_GUDHI_PYTHON_lib_dir '${THE_LIB_DIR}'")
  + set(GUDHI_PYTHON_LIBRARY_DIRS "${GUDHI_PYTHON_LIBRARY_DIRS}'${THE_LIB_DIR}', " PARENT_SCOPE)
  else()
  message("add_GUDHI_PYTHON_lib_dir - '${THE_LIB_DIR}' does not exist")
  endif()
  