From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 51854 invoked by alias); 22 May 2015 18:33:12 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Received: (qmail 49942 invoked by uid 89); 22 May 2015 18:33:12 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.7 required=5.0 tests=AWL,BAYES_00,KAM_LAZY_DOMAIN_SECURITY autolearn=no version=3.3.2 X-HELO: topped-with-meat.com MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit From: Roland McGrath To: Joseph Myers Cc: Subject: Re: Old compiler optimizations in installed headers In-Reply-To: Joseph Myers's message of Friday, 22 May 2015 15:03:01 +0000 References: Message-Id: <20150522183308.61C232C3ABD@topped-with-meat.com> Date: Fri, 22 May 2015 22:19:00 -0000 X-CMAE-Score: 0 X-CMAE-Analysis: v=2.1 cv=SvUDtp+0 c=1 sm=1 tr=0 a=WkljmVdYkabdwxfqvArNOQ==:117 a=14OXPxybAAAA:8 a=kj9zAlcOel0A:10 a=hOe2yjtxAAAA:8 a=HvS1pXafw8So9BMXw7wA:9 a=CjuIK1q_8ugA:10 X-SW-Source: 2015-05/txt/msg00556.txt.bz2 I think that all makes perfect sense. Starting with 4.1 or 4.3 is a completely reasonable conservative starting place. I think we should consider the minimum GCC version required for building libc itself as the only clear upper bound on the minimum GCC version for which we bother to maintain any optimizations in headers. Keeping the minimum for header optimizations at a lower version requires continual proof that it matters to anyone, any time it looks like raising it would ease the maintenance burden. Thanks, Roland