The SCons utility provides a Help function to allow the writer of a SConstruct file to provide help text that is specific to the local build tree:

	Help("""
	Type:
	        scons .         build and test everything
	        scons test      build the software
	        scons src       run the tests
	        scons web       build the web pages
	""")
	

This help text is displayed in response to the -h command-line option. Calling the Help function more than once is an error.