I'm looking for a (preferably open source) tool that, given a large body of C/C++ code, will generate a visual or maybe XML graph of dependencies between classes (C++) and/or files (C).
The idea would be that, if you had to convert the code to another language, you'd like to be able to get the lowest level classes compiling first, and build up from there. So, you'd first need to identify which classes those are.
As far as I can tell, Doxygen doesn't have quite this capability, but I could be wrong.
Documentation and Reverse Engineering Tools
1) Doxygen
2) inSight (Unix, Linux, Windows)
3) Rational Rose
4) Source Navigator
5) BOUML
List of Non-commercial/Free UML tools
I haven't used any open sources tools for this, but the Rhapsody UML tool does a good job of doing this. They used to give a 30 day free trial to anyone who asked, IBM just bought it so I don't know if they still do.
http://www-01.ibm.com/software/awdtools/rhapsody/ It will reverse C/C++/Java/Ada.
Doxygen will do some pretty neat graphs.