System for generating C/C++ references?

[Lowell Gilbert]

Michal Pasternak <michal at pasternak.w.lub.pl> writes:

> I am looking for some sort of software which would allow me
> to generate C/C++ (and preferably other languages, like Python
> or PHP) references for a given project. Suppose I am browsing
> FreeBSD kernel, notice, that a function uses ,,struct somestruct''
> as it's parameter. I want to see, what other functions use this
> struct and where's that struct defined. I know, that tools like
> find and grep might be helpful :) but it is uncomfortable
> to grep kernel sources every time I want to find something.
> 
> I am sure I have seen projects like this, but I cant remember
> the name. Could you? Thanks in advance.
> 
> Please CC: me, as I am not quite a subscriber of this list.

I think vi can use tags files for this.  emacs certainly can.