From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: GDB and compiler-operations Date: Fri, 7 Sep 2018 10:15:53 -0700 Organization: UCLA Computer Science Department Message-ID: <90fea1c0-4f97-bd7a-feee-fb1dde7af84c@cs.ucla.edu> References: <5a2c709e-aa49-b5b6-3fbe-fb8bd33acb23@cs.ucla.edu> <06d01a4b-9d98-df5b-be8a-aeda449acad7@cs.ucla.edu> <83bm99vijd.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: blaine.gmane.org 1536340455 7930 195.159.176.226 (7 Sep 2018 17:14:15 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 7 Sep 2018 17:14:15 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 To: Stefan Monnier , emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Sep 07 19:14:11 2018 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 1fyKKh-0001wc-EM for ged-emacs-devel@m.gmane.org; Fri, 07 Sep 2018 19:14:11 +0200 Original-Received: from localhost ([::1]:39643 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fyKMn-0003RQ-V1 for ged-emacs-devel@m.gmane.org; Fri, 07 Sep 2018 13:16:21 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:60926) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fyKMg-0003RG-RK for emacs-devel@gnu.org; Fri, 07 Sep 2018 13:16:15 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fyKMY-0007uV-Dw for emacs-devel@gnu.org; Fri, 07 Sep 2018 13:16:12 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:56084) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fyKMR-0007kK-VB for emacs-devel@gnu.org; Fri, 07 Sep 2018 13:16:02 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id E222F16116C; Fri, 7 Sep 2018 10:15:54 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id zSE5p3vjxz4c; Fri, 7 Sep 2018 10:15:54 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 2A821161170; Fri, 7 Sep 2018 10:15:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id mLm5VzHCWjqo; Fri, 7 Sep 2018 10:15:54 -0700 (PDT) Original-Received: from Penguin.CS.UCLA.EDU (Penguin.CS.UCLA.EDU [131.179.64.200]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 0F8F216116C; Fri, 7 Sep 2018 10:15:54 -0700 (PDT) Openpgp: preference=signencrypt Autocrypt: addr=eggert@cs.ucla.edu; prefer-encrypt=mutual; keydata= xsFNBEyAcmQBEADAAyH2xoTu7ppG5D3a8FMZEon74dCvc4+q1XA2J2tBy2pwaTqfhpxxdGA9 Jj50UJ3PD4bSUEgN8tLZ0san47l5XTAFLi2456ciSl5m8sKaHlGdt9XmAAtmXqeZVIYX/UFS 96fDzf4xhEmm/y7LbYEPQdUdxu47xA5KhTYp5bltF3WYDz1Ygd7gx07Auwp7iw7eNvnoDTAl KAl8KYDZzbDNCQGEbpY3efZIvPdeI+FWQN4W+kghy+P6au6PrIIhYraeua7XDdb2LS1en3Ss mE3QjqfRqI/A2ue8JMwsvXe/WK38Ezs6x74iTaqI3AFH6ilAhDqpMnd/msSESNFt76DiO1ZK QMr9amVPknjfPmJISqdhgB1DlEdw34sROf6V8mZw0xfqT6PKE46LcFefzs0kbg4GORf8vjG2 Sf1tk5eU8MBiyN/bZ03bKNjNYMpODDQQwuP84kYLkX2wBxxMAhBxwbDVZudzxDZJ1C2VXujC OJVxq2kljBM9ETYuUGqd75AW2LXrLw6+MuIsHFAYAgRr7+KcwDgBAfwhPBYX34nSSiHlmLC+ KaHLeCLF5ZI2vKm3HEeCTtlOg7xZEONgwzL+fdKo+D6SoC8RRxJKs8a3sVfI4t6CnrQzvJbB n6gxdgCu5i29J1QCYrCYvql2UyFPAK+do99/1jOXT4m2836j1wARAQABzSBQYXVsIEVnZ2Vy dCA8ZWdnZXJ0QGNzLnVjbGEuZWR1PsLBfgQTAQIAKAUCTIByZAIbAwUJEswDAAYLCQgHAwIG FQgCCQoLBBYCAwECH In-Reply-To: Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 131.179.128.68 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:229433 Archived-At: On 09/07/2018 08:58 AM, Stefan Monnier wrote: >> On a newer platform where GDB can see C macros (you really should enable >> this if you can, by the way, it mak,es debugging easier), > I'm on Debian testing, which doesn't strike me as old. > How new does it need to be? Sorry, don't know offhand. But tool age doesn't appear to apply to you (see below). > >> I see this: >> >> (gdb) p offsetof (struct Lisp_Vector, contents) >> No symbol "__builtin_offsetof" in current context. > Hmm... indeed that's the error I was seeing the other day, but today > I get the other one. IIRC this was the same machine, tho (and if not, > it was one running Debian testing or Debian stable, so nothing newer). Most likely when you were getting the other message you compiled with plain -g instead of -g3. './configure' tries to default to -g3 if available but perhaps you overrode that, or it didn't work for you.