From: Nigel Heath (DJGPP MAILING list) <DJGPP AT nheath DOT demon DOT co DOT uk>
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Date:          Fri, 24 Feb 1995 23:44:39 +0000
Subject:       Re: Segmentation violation
Reply-To: DJGPP AT nheath DOT demon DOT co DOT uk

>  What you should do is compile with the -g switch and then after you get
>the stack dump, run symify (just type "symify a.out") and it'll tell you
>where the bad pointer is.  Then go look at your code and try to figure out
>why that pointer might be pointing to NULL.

This helped me quite a lot because when I ran symify I found it had 
somehow jumped into another part of the program I soon tracked this 
down then to a call to open() with a NULL pointer for the filename. 
Though I would have thought  open would have trapped this.

Anyway may thank for the pointer.

Nigel Heath
--
Nigel AT nheath DOT demon DOT co DOT uk
nheath AT cix DOT compulink DOT co DOT uk