From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Ken Brown Newsgroups: gmane.emacs.bugs Subject: bug#23640: 25.1.50; Getting rid of compiler warnings Date: Sat, 28 May 2016 17:47:53 -0400 Message-ID: <13ba9f48-d461-5e4d-7017-20b3aec2b98c@cornell.edu> References: <83mvnaxb6u.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1464472166 29249 80.91.229.3 (28 May 2016 21:49:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 28 May 2016 21:49:26 +0000 (UTC) Cc: 23640@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat May 28 23:49:16 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1b6m6d-0001N4-Ja for geb-bug-gnu-emacs@m.gmane.org; Sat, 28 May 2016 23:49:15 +0200 Original-Received: from localhost ([::1]:54247 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b6m6b-0007aF-O9 for geb-bug-gnu-emacs@m.gmane.org; Sat, 28 May 2016 17:49:13 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45454) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b6m6V-0007ZI-Fr for bug-gnu-emacs@gnu.org; Sat, 28 May 2016 17:49:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b6m6Q-00060U-91 for bug-gnu-emacs@gnu.org; Sat, 28 May 2016 17:49:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:60983) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b6m6Q-00060Q-6A for bug-gnu-emacs@gnu.org; Sat, 28 May 2016 17:49:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1b6m6P-00068K-V0 for bug-gnu-emacs@gnu.org; Sat, 28 May 2016 17:49:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Ken Brown Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 28 May 2016 21:49:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 23640 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 23640-submit@debbugs.gnu.org id=B23640.146447208823513 (code B ref 23640); Sat, 28 May 2016 21:49:01 +0000 Original-Received: (at 23640) by debbugs.gnu.org; 28 May 2016 21:48:08 +0000 Original-Received: from localhost ([127.0.0.1]:45087 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1b6m5U-000677-0W for submit@debbugs.gnu.org; Sat, 28 May 2016 17:48:08 -0400 Original-Received: from limerock01.mail.cornell.edu ([128.84.13.241]:51209) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1b6m5S-00066d-Ng for 23640@debbugs.gnu.org; Sat, 28 May 2016 17:48:03 -0400 X-CornellRouted: This message has been Routed already. Original-Received: from authusersmtp.mail.cornell.edu (granite4.serverfarm.cornell.edu [10.16.197.9]) by limerock01.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id u4SLlsP0026716; Sat, 28 May 2016 17:47:55 -0400 Original-Received: from [192.168.1.3] (mta-68-175-148-36.twcny.rr.com [68.175.148.36] (may be forged)) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id u4SLlquY028814 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Sat, 28 May 2016 17:47:54 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0 In-Reply-To: <83mvnaxb6u.fsf@gnu.org> X-PMX-Cornell-Gauge: Gauge=XXXXX X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:118820 Archived-At: On 5/28/2016 2:57 PM, Eli Zaretskii wrote: >> From: Ken Brown >> Date: Sat, 28 May 2016 14:40:36 -0400 >> >> Building master on Cygwin with gcc-5.3.0 yields many "control reaches >> end of non-void function" warnings. What's the best way to get rid of >> these? Should I add return statements that will never be reached, like >> this? >> >> --- a/src/frame.c >> +++ b/src/frame.c >> @@ -263,6 +263,8 @@ See also `frame-live-p'. */) >> return Qns; >> default: >> emacs_abort (); >> + /* Pacify compiler. */ >> + return Qnil; >> } >> } > > emacs_abort is declared with _Noreturn, so how come GCC doesn't shut > up about "unreachable" code? It looks like the problem is the definition of _Noreturn as a macro in config.h. I'll have to figure out what's going on. Ken