Date: Thu, 29 Feb 1996 13:13:28 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: j DOT aldrich6 AT genie DOT com
Cc: djgpp AT delorie DOT com
Subject: Re: GDB discovers another one!
In-Reply-To: <199602282348.AA196631316@relay1.geis.com>
Message-Id: <Pine.SUN.3.91.960229130434.14376A-100000@is>
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII


On Wed, 28 Feb 1996 j DOT aldrich6 AT genie DOT com wrote:

> Question:  If I stubedit the executable, but run it thru 'redir' or 
> 'gdb', does the program use its own stubedited values or those of 
> 'redir' and 'gdb'?  I think I know the answer, but I want to be sure.

Every program uses its own values, because each program gets its own 
stack.

> But when I put it in the main header file for my program, I got the following
> warning
> in each of the program files:
> 
> in file included with [file].c
> merc.h: 1996: warning: '_stklen' initialized and declared extern
> 
> Then, I got the following linker error, one for each program file:
> 
> multiple definition of '_stklen'

Don't put the line which enlarges `_stklen' in a header file included by 
more than one source file, because then you are initializing a global 
variable more than once, and the linker won't let you do this.  Instead, 
include that line in a *single* source file.  It's best to do this on the 
source file which defines the function that actually needs a large stack 
(that way, if you decide someday to make it part of a library, you won't 
get mysterious crashes), but any file will do.

The warning that tells you that `_stklen' is both declared extern and
initialized should go away if you remove `extern' from the declaration,
like this: 

	unsigned _stklen = ...