From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.bugs Subject: bug#63556: 29.0.90; Use of _Generic breaks Emacs build on GCC <4.9 Date: Thu, 18 May 2023 20:05:59 -0700 Organization: UCLA Computer Science Department Message-ID: <800a427a-514f-8ef5-326d-6abc06fb036a@cs.ucla.edu> References: <4b378d55-ef65-7a0f-b03d-e304785cf60d@cs.ucla.edu> <87v8gp51ys.fsf@yahoo.com> <87mt21408l.fsf@yahoo.com> 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="3759"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0 Cc: Spencer Baugh , 63556@debbugs.gnu.org To: Po Lu Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri May 19 05:07:24 2023 Return-path: Envelope-to: geb-bug-gnu-emacs@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 ) id 1pzqSh-0000mM-S3 for geb-bug-gnu-emacs@m.gmane-mx.org; 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a=rsa-sha256; c=relaxed/relaxed; d=cs.ucla.edu; s=9D0B346E-2AEB-11ED-9476-E14B719DCE6C; t=1684465561; bh=mGdbqcGvtR3BcnBvl353VC5zpVKSrpygQmdUy6ySu5c=; h=Message-ID:Date:MIME-Version:To:From; b=jUjOLm4UL8jNgqs8r/2y76Q/dfuPHt2tVSDgz4D6o7o1VZKoTNC9UZJfb1Cf+1od0 b6r4bMwzCDr4CFln+Xwez6PUdJJJdfD2lwZAjVHdAyBHsfGvfxs2+4/cAAFEiR6Ypk +481iFJ+VT2WYC1iLoecCq0eAwlOp1Es13p4QrT1pchpaoMvaMoO7mZ4QyvAEaWd8j lxVZUOAoZ15xJ/hlZhEljetRvflYu+TcnTI8caprIMYIbhycwrLUwss1p+97rAHPfe Zzo0/Tu/HmjpSQd4BMyOY9kqowAzX4WOGcZZw/7wZBdM/Tk5doVL6AYqYHtnBq7nGT L8om4s191OjDg== X-Virus-Scanned: amavisd-new 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]) (amavisd-new, port 10026) with ESMTP id vd68y4VIltw0; Thu, 18 May 2023 20:06:01 -0700 (PDT) Original-Received: from [131.179.64.200] (Penguin.CS.UCLA.EDU [131.179.64.200]) by mail.cs.ucla.edu (Postfix) with ESMTPSA id 0C5773C020F7C; Thu, 18 May 2023 20:06:01 -0700 (PDT) Content-Language: en-US In-Reply-To: <87mt21408l.fsf@yahoo.com> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:261968 Archived-At: On 5/18/23 17:46, Po Lu wrote: > How does intprops.h work on such systems? It relies on _Generic. (Those systems use neither GCC nor Clang.) > OK, but that's the second use of `long long' in src/ outside of > NT-specific files. I can't help but be a little skittish. Fair enough, although I see more than just one other use: EMACS_INT (32-bit platforms configured --with-wide-int), color_distance, time_from_jiffies (in Linux), system_process_attributes (in Linux). Currently there's a 'verify (PTRDIFF_MAX <= ULLONG_MAX);' protecting the use of elogb in lisp.h. Would it help to add a 'verify (max (-MOST_NEGATIVE_FIXNUM, MOST_POSITIVE_FIXNUM) <= ULLONG_MAX);' to protect its use in floatfns.c?