X-Authentication-Warning: delorie.com: mail set sender to djgpp-workers-bounces using -f
Date: Sat, 20 Nov 2004 13:03:56 +0200
From: "Eli Zaretskii" <eliz AT gnu DOT org>
Sender: halo1 AT zahav DOT net DOT il
To: djgpp-workers AT delorie DOT com
Message-ID: <01c4cef0$Blat.v2.2.2$c9cf5ea0@zahav.net.il>
Content-Transfer-Encoding: 7BIT
Content-Type: text/plain; charset=ISO-8859-1
X-Mailer: emacs 21.3.50 (via feedmail 8 I) and Blat ver 2.2.2
In-reply-to: <01c4cb97$Blat.v2.2.2$3bf48f80@zahav.net.il> (eliz@gnu.org)
Subject: Re: Alignment problem on Windows XP
References: <10411160406 DOT AA85585 AT clio DOT rice DOT edu> <01c4cb97$Blat.v2.2.2$3bf48f80 AT zahav DOT net DOT il>
Reply-To: djgpp-workers AT delorie DOT com
Errors-To: nobody AT delorie DOT com
X-Mailing-List: djgpp-workers AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com
Precedence: bulk

> Date: Tue, 16 Nov 2004 06:45:25 +0200
> From: "Eli Zaretskii" <eliz AT gnu DOT org>
> 
> > From: sandmann AT clio DOT rice DOT edu (Charles Sandmann)
> > Date: Mon, 15 Nov 2004 22:06:45 -0600 (CST)
> > 
> > I'm using 2.953 and binutil 2.11.2 - no problems here except compile warnings:
> > 
> > May be related to the GCC compiler and linker used?
> 
> Compiler--no, as I tried with 2.95.x as well.
> 
> Linker--maybe; didn't try with 2.11 yet.  Will try later.

Tried that: no cigar.  With ld and gas from Binutils 2.11.2, I still
get unaligned data with the latest libc.a.  Note that I only used
libc.a, but didn't replace my crt0.o with the one that comes with the
latest libc.a -- could that be the reason?

Anyway, I don't understand how replacing libc.a alone could change the
alignment.  Can someone suggest where to look for the possible
explanations?

Also note that these warnings from the compiler:

  abug.c:14: warning: alignment of `ss1' is greater than maximum object file alignment. Using 4.
  abug.c:15: warning: alignment of `ss2' is greater than maximum object file alignment. Using 4.
  abug.c:16: warning: alignment of `ss3' is greater than maximum object file alignment. Using 4.
  abug.c:17: warning: alignment of `ss4' is greater than maximum object file alignment. Using 4.

actually mean that you shouldn't expect the variables to be aligned,
as GCC tells you that it doesn't support more than 4-byte alignment.
So it's not a harmless warning.