From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Suspicious warning in W64 build Date: Thu, 07 Sep 2017 18:16:06 +0300 Message-ID: <83tw0ezgi1.fsf@gnu.org> References: <1017454172.910810.1504618695244@mail.libero.it> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1504797427 22143 195.159.176.226 (7 Sep 2017 15:17:07 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 7 Sep 2017 15:17:07 +0000 (UTC) Cc: emacs-devel@gnu.org To: Angelo Graziosi Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Sep 07 17:16:46 2017 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dpyXQ-0003pS-On for ged-emacs-devel@m.gmane.org; Thu, 07 Sep 2017 17:16:16 +0200 Original-Received: from localhost ([::1]:40887 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dpyXX-0006UH-UY for ged-emacs-devel@m.gmane.org; Thu, 07 Sep 2017 11:16:23 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:48092) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dpyXM-0006U2-GU for emacs-devel@gnu.org; Thu, 07 Sep 2017 11:16:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dpyXC-0007cy-Me for emacs-devel@gnu.org; Thu, 07 Sep 2017 11:16:12 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:60101) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dpyXC-0007cs-K9; Thu, 07 Sep 2017 11:16:02 -0400 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:1958 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1dpyXC-0003Uu-6g; Thu, 07 Sep 2017 11:16:02 -0400 In-reply-to: <1017454172.910810.1504618695244@mail.libero.it> (message from Angelo Graziosi on Tue, 5 Sep 2017 15:38:15 +0200 (CEST)) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:217981 Archived-At: > Date: Tue, 5 Sep 2017 15:38:15 +0200 (CEST) > From: Angelo Graziosi > > In the log build of current master on MSYS2/MINGW64, I see: > > [...] > CC w32term.o > C:/msys64/tmp/src/src/w32font.c: In function 'w32font_text_extents': > C:/msys64/tmp/src/src/w32font.c:547:9: warning: argument 1 range [18446744065119617024, 18446744073709551612] exceeds maximum object size 9223372036854775807 [-Walloc-size-larger-than=] > wcode = alloca (nglyphs * sizeof (WORD) * 2); > ^ > C:/msys64/tmp/src/src/w32font.c:547:9: note: in a call to built-in allocation function '__builtin_alloca' What version of GCC produces this warning? I don't see it with GCC 6.3.0, or maybe it's because my builds are 32-bit, not 64-bit. In any case, I have difficulty understanding this part: argument 1 range [18446744065119617024, 18446744073709551612] Where did it take these 2 numbers?