Date: Mon, 28 Nov 94 18:27:28 -0500
From: dj AT stealth DOT ctron DOT com (DJ Delorie)
To: A DOT APPLEYARD AT fs1 DOT mt DOT umist DOT ac DOT uk
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: Unused variables

>   In djgpp, how can I get a list of all variables and labels in a program
> which are declared but not used? I was editing a program which someone wants
> me to make it more efficient, and in the process many variables became
> redundant, and I want to find them by some means quicker than having to search
> for every one with my emacs's search-for-word.


Compile with the -Wall switch.  This will take care of most local and
static variables.  As for globals, you have to "nm" the object files
looking for references to them - it's not automatic.