Function Hierarchy

[David Riches]

I'm looking for a package/tool which, given a set of C files, will
produce an output which describes the hierarchy of the files.

I.e. it will show, perhaps in a diagrammatic way, where functions
are called.

E.g.
	main()
	    load_site_form()
		load_site_points()
		load_nodes()
	    display_form()
	    edit_form()
		change_attributes()
		    specify_new_values()
		    validate_new_values()
		save_changes()

And so on.  It would be nice if it could list the hierarchy in a
number of different ways, e.g. show variables, not show system calls
etc.


If anyone knows of such tools could they please let me know as soon
as possible.

Thanks


   Dave Riches
   PSS:    dsr at stl.stc.co.uk
   ARPA:   dsr%stl.stc.co.uk at earn-relay.ac.uk
   Smail:  Software Design Centre, (Dept. 103, T2 West), 
	   STC Technology Ltd., London Road,
	   Harlow, Essex. CM17 9NA.  England
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