creating a code cross reference (C)

[yonatan.lehman]

Hi
I model out C code using mostly activity diagrams, component diagrams, and sequence diagrams.
I would like to generate output (raw text if possible) showing the modeled relationships such as:

X calls/uses Y
Where X and Y are activities and their enclosing packages  (or some other entity)

Is there any way I can do using EA (V14 at the moment) ?
Should I be using some other types of EA entities to model C modules/functions/data in order to be able to generate such cross-reference information?

Ideally, I would like to compare this to the output generated by cxref so that I could compare the modeled interconnection information to the interconnection information from the C code.

Maybe I'm missing something  - how do people manage to keep the EA-based documentation up to date with the code (assuming we're not using generated code).

Thanks
Yonatan