From mboxrd@z Thu Jan  1 00:00:00 1970
Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail
From: Paul Eggert <eggert@cs.ucla.edu>
Newsgroups: gmane.emacs.devel
Subject: Re: pdumper on Solaris 10
Date: Tue, 17 Dec 2024 13:14:34 -0800
Organization: UCLA Computer Science Department
Message-ID: <d0233695-8cd2-4fe8-9a5d-fb66d6066d16@cs.ucla.edu>
References: <mailman.39.1723910423.12184.emacs-devel@gnu.org>
 <8634iwex8q.fsf@gnu.org>
 <CADwFkmny8-5q48b6O=9bYSgkQc1f2J2vLOAxseLLW2Y5CRLCzQ@mail.gmail.com>
 <86wmg7bso1.fsf@gnu.org>
 <eOZG3TF9G5adxRosYbOzoDzRnVKc-m-EqJQg7OUid7FCAcUbrhDleevYvMQe-TodgcZQ7rVa_iURKpPd2lUAhL32XXig2OapB6OvP7I6izU=@protonmail.com>
 <865xnrbh3r.fsf@gnu.org> <m2msh3s9dz.fsf@gmail.com>
 <87bjxil35f.fsf@protonmail.com> <86seqqtjzb.fsf@gnu.org>
 <87o71ddxmf.fsf@protonmail.com> <86a5cxryfp.fsf@gnu.org>
 <89cba675-90e6-49d1-b774-f0498de6ac19@cs.ucla.edu> <86pllqm5a5.fsf@gnu.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214";
	logging-data="5063"; mail-complaints-to="usenet@ciao.gmane.io"
User-Agent: Mozilla Thunderbird
Cc: pipcet@protonmail.com, gerd.moellmann@gmail.com, emacs-devel@gnu.org
To: Eli Zaretskii <eliz@gnu.org>
Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Dec 17 22:15:34 2024
Return-path: <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>
Envelope-to: ged-emacs-devel@m.gmane-mx.org
Original-Received: from lists.gnu.org ([209.51.188.17])
	by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org>)
	id 1tNeuk-0001A0-3g
	for ged-emacs-devel@m.gmane-mx.org; Tue, 17 Dec 2024 22:15:34 +0100
Original-Received: from localhost ([::1] helo=lists1p.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.90_1)
	(envelope-from <emacs-devel-bounces@gnu.org>)
	id 1tNetv-0006cQ-M5; Tue, 17 Dec 2024 16:14:43 -0500
Original-Received: from eggs.gnu.org ([2001:470:142:3::10])
 by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <eggert@cs.ucla.edu>)
 id 1tNetr-0006c1-S2
 for emacs-devel@gnu.org; Tue, 17 Dec 2024 16:14:40 -0500
Original-Received: from mail.cs.ucla.edu ([131.179.128.66])
 by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.90_1) (envelope-from <eggert@cs.ucla.edu>)
 id 1tNetq-0001aW-4c; Tue, 17 Dec 2024 16:14:39 -0500
Original-Received: from localhost (localhost [127.0.0.1])
 by mail.cs.ucla.edu (Postfix) with ESMTP id 73F453C00FB31;
 Tue, 17 Dec 2024 13:14:35 -0800 (PST)
Original-Received: from mail.cs.ucla.edu ([127.0.0.1])
 by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10032) with ESMTP
 id OiS4_v0sXNAH; Tue, 17 Dec 2024 13:14:35 -0800 (PST)
Original-Received: from localhost (localhost [127.0.0.1])
 by mail.cs.ucla.edu (Postfix) with ESMTP id EAAF63C00FAAA;
 Tue, 17 Dec 2024 13:14:34 -0800 (PST)
DKIM-Filter: OpenDKIM Filter v2.10.3 mail.cs.ucla.edu EAAF63C00FAAA
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.ucla.edu;
 s=9D0B346E-2AEB-11ED-9476-E14B719DCE6C; t=1734470075;
 bh=7Pd9EHWQFg9dMZ4rWk0ubEhgkLdbxHTLHXXPaFguSHc=;
 h=Message-ID:Date:MIME-Version:To:From;
 b=O9SixVayHyeS09vJkFkm1BN8O42lv5FgfVbR9awJK3FgognXe+tsKDXnW16rlIJCJ
 zpIYElciTGoHH76O9bIcKtl2PdSa5tl+xXMdUBKGBGkn6rkZ1/9OSU63/p2EJgogFm
 EENOP73U+TaCtQMFDvJN/Zhpcb+ls/O0COKIV9tFj1nlhjXagKfPQQanjMhs3q2tgw
 hgLWmdmZoRwsk6fuCRK7efDhvY7qB8k07DoiIB4iy4+QG5FH7sOsDMKjF8KhNKobM4
 kNU2a9oU5tvNY1McARdayEacnb2tkOtzXl6SpOFM9wxEa+1B0diq8pjKj0ZMXWk3d9
 6M80bwrZyy77Q==
X-Virus-Scanned: amavis at mail.cs.ucla.edu
Original-Received: from mail.cs.ucla.edu ([127.0.0.1])
 by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10026) with ESMTP
 id QRT-eaWSMgfv; Tue, 17 Dec 2024 13:14:34 -0800 (PST)
Original-Received: from [192.168.254.12] (unknown [47.154.27.134])
 by mail.cs.ucla.edu (Postfix) with ESMTPSA id C99B93C00FB31;
 Tue, 17 Dec 2024 13:14:34 -0800 (PST)
Content-Language: en-US
In-Reply-To: <86pllqm5a5.fsf@gnu.org>
Received-SPF: pass client-ip=131.179.128.66; envelope-from=eggert@cs.ucla.edu;
 helo=mail.cs.ucla.edu
X-Spam_score_int: -19
X-Spam_score: -2.0
X-Spam_bar: --
X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,
 DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,
 RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001,
 SPF_PASS=-0.001 autolearn=ham autolearn_force=no
X-Spam_action: no action
X-BeenThere: emacs-devel@gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Emacs development discussions." <emacs-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-devel>,
 <mailto:emacs-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/emacs-devel>
List-Post: <mailto:emacs-devel@gnu.org>
List-Help: <mailto:emacs-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-devel>,
 <mailto:emacs-devel-request@gnu.org?subject=subscribe>
Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org
Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org
Xref: news.gmane.io gmane.emacs.devel:326617
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/326617>

On 2024-12-17 12:19, Eli Zaretskii wrote:
> why doesn't the cast to mps_addr_t work to avoid the warning?
> mps_addr_t is 'void *', a 32-bit pointer.  Is this something specific
> to pointers, while casting to a 32-bit integer doesn't trigger the
> warnings?

Yes, the idea is for GCC to diagnose casts between pointers and 
wrong-sized integers.


> what is the rationale for warning about pointers,
> but not about integers?

Warning about integer conversion is controlled by -Wconversion. However, 
that GCC option generates far too many false positives for useful code, 
so I don't recommend it. I just tried -Wconversion on Emacs master and 
got over 10,000 bogus warnings. Changing Emacs to pacify -Wconversion 
would cause more trouble than it'd cure.