From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 84687 invoked by alias); 27 Apr 2018 20:00:58 -0000 Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org Received: (qmail 84558 invoked by uid 89); 27 Apr 2018 20:00:50 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.0 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=HContent-Transfer-Encoding:8bit X-HELO: mx1.redhat.com Received: from mx3-rdu2.redhat.com (HELO mx1.redhat.com) (66.187.233.73) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 27 Apr 2018 20:00:48 +0000 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8334A8190296; Fri, 27 Apr 2018 20:00:47 +0000 (UTC) Received: from [127.0.0.1] (ovpn04.gateway.prod.ext.ams2.redhat.com [10.39.146.4]) by smtp.corp.redhat.com (Postfix) with ESMTP id DDDC72026985; Fri, 27 Apr 2018 20:00:46 +0000 (UTC) Subject: Re: GDB 8.1 build error To: Simon Marchi References: <214C80CC-1173-41F6-AAA1-39C9D39E28B2@comcast.net> <454707570722fc0220074c0eca015a8f@polymtl.ca> Cc: Paul Koning , gdb@sourceware.org From: Pedro Alves Message-ID: <6171a043-e486-85ec-bdbb-2077a2b5ebd0@redhat.com> Date: Fri, 27 Apr 2018 20:16:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-SW-Source: 2018-04/txt/msg00034.txt.bz2 On 04/27/2018 08:18 PM, Simon Marchi wrote: > On 2018-04-27 15:08, Pedro Alves wrote: >> Oh, wait....  Your build line has no "-W" at all, it has "-w" instead?? >> How did that happen? > > When --disable-build-warnings is used, we don't put any -W/-Wno- flags: > > https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob;f=gdb/warning.m4;h=f176a3291aa68acf0122609531abb4652425525b;hb=HEAD#l62 But then, we add "-w", and I'm surprised that "-w" did not disable all warnings, including "-Wc++11-narrowing". "-w" is supposed to mean disable all warnings. At least, that's how GCC behaves. Could that be a clang bug? Thanks, Pedro Alves