From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: USE_LSB_TAG and MS-DOS Date: 17 May 2004 08:10:25 +0200 Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Message-ID: References: <2719-Sat15May2004150718+0300-eliz@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: deer.gmane.org X-Trace: sea.gmane.org 1084770674 14307 80.91.224.253 (17 May 2004 05:11:14 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Mon, 17 May 2004 05:11:14 +0000 (UTC) Cc: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Mon May 17 07:10:57 2004 Return-path: Original-Received: from quimby.gnus.org ([80.91.224.244]) by deer.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 1BPaOv-0002jS-00 for ; Mon, 17 May 2004 07:10:57 +0200 Original-Received: from monty-python.gnu.org ([199.232.76.173]) by quimby.gnus.org with esmtp (Exim 3.35 #1 (Debian)) id 1BPaOv-0008Q1-00 for ; Mon, 17 May 2004 07:10:57 +0200 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.34) id 1BPaOO-00080I-9e for emacs-devel@quimby.gnus.org; Mon, 17 May 2004 01:10:24 -0400 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.34) id 1BPaO5-000802-1l for emacs-devel@gnu.org; Mon, 17 May 2004 01:10:05 -0400 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.34) id 1BPaMR-0007PH-Su for emacs-devel@gnu.org; Mon, 17 May 2004 01:09:02 -0400 Original-Received: from [207.232.27.5] (helo=WST0054) by monty-python.gnu.org with asmtp (Exim 4.34) id 1BPaMR-0007KS-4x; Mon, 17 May 2004 01:08:23 -0400 Original-To: Stefan Monnier In-reply-to: (message from Stefan Monnier on 16 May 2004 19:40:23 -0400) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.4 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Xref: main.gmane.org gmane.emacs.devel:23565 X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:23565 > From: Stefan Monnier > Date: 16 May 2004 19:40:23 -0400 > > Can you compile with ENABLE_CHECKING and try again? > And give me a backtrace? Will try to do that soon. By ``backtrace'' you meant a C-level backtrace inside GDB, yes? > After all, all we need is to make sure pointers are multiples of 8. > GNU malloc guarantees that AFAIK for malloced objects and DECL_ALIGN allows > to get the same guarantee for static objects, so if we have both the only > reasonf ro USE_LSB_TAG to fail is a bug, right? Perhaps so, but, being unsure I know enough about the alignment issues, I bother. For example, is stack alignment an issue? And what about the default alignment used by GCC for code and data? I also need to check whether the __attribute__((__align__)) thingy is supported and does TRT in the DJGPP (a.k.a. MS-DOS) port of GCC. There was also talk about using memalign. I didn't follow that thread closely, so I don't remember: is that relevant in any way to the case in point?