How to trace include file chains?

[Kyndig]

I hope I'm not posting in the wrong group; but I figured c programmers
would be the ones most likely to have an answer to my question.

Let's say I have a directory full of source files and I want to
determine which file I should modify in order to change the FD_SETSIZE
macro. I'd have to look at all the source files that define and
redefine the macro and take into account the chain of #include
directives.

Are there any utilities for unix that could search through the source
files, following all #include directives, and report which file
effectively set's the macro which is to be used. If there are no
utilities, how would you suggest I go about this?

Thank you in advance!

 

[Jogi Kuenstner]

I hope I'm not posting in the wrong group; but I figured c programmers
would be the ones most likely to have an answer to my question.

Let's say I have a directory full of source files and I want to
determine which file I should modify in order to change the FD_SETSIZE
macro. I'd have to look at all the source files that define and
redefine the macro and take into account the chain of #include
directives.

Are there any utilities for unix that could search through the source
files, following all #include directives, and report which file
effectively set's the macro which is to be used. If there are no
utilities, how would you suggest I go about this?

Thank you in advance!

I think it's extremely OT, but did you have a look at Source-Navigator?
http://sourcenav.sourceforge.net/

Jogi