How to find out who calls a function?

[Thorsten]

Hi List, 

I wonder if there are ways to produce a call graph for elisp libraries,
or at least list all functions in the library that call a specified
function? 

I use M-x occur to find out where function names appear, or edebug to
follow the controlflow. But maybe there are more specialised ways to
find out the call relationships between functions in a (big) library?

Thanks for any hints.
-- 
Thorsten