From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 38194 invoked by alias); 6 Oct 2015 22:20:25 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 38175 invoked by uid 89); 6 Oct 2015 22:20:24 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=4.0 required=5.0 tests=AWL,BAYES_50,FREEMAIL_FROM,KAM_COUK,RCVD_IN_JMF_BL,SPF_PASS autolearn=no version=3.3.2 X-HELO: out.ipsmtp3nec.opaltelecom.net Received: from out.ipsmtp3nec.opaltelecom.net (HELO out.ipsmtp3nec.opaltelecom.net) (62.24.202.75) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Tue, 06 Oct 2015 22:20:22 +0000 X-SMTPAUTH: drstacey@tiscali.co.uk X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2HPAQA0SBRW/yJf0lUNUYN7b8APIYV0AwICgXkQAQEBAQEBAQODWTwBAQEBAQEjAg1fAQEEIwQRQBELGAICBRYLAgIJAwIBAgFFEwgBAYg3qyRxlC4BAQgCAR+BIopPhRQXglKBRQWSTYM3hRiKHox4jFc4hC6JLQEBAQ X-IPAS-Result: A2HPAQA0SBRW/yJf0lUNUYN7b8APIYV0AwICgXkQAQEBAQEBAQODWTwBAQEBAQEjAg1fAQEEIwQRQBELGAICBRYLAgIJAwIBAgFFEwgBAYg3qyRxlC4BAQgCAR+BIopPhRQXglKBRQWSTYM3hRiKHox4jFc4hC6JLQEBAQ Received: from 85-210-95-34.dynamic.dsl.as9105.com (HELO [192.168.1.2]) ([85.210.95.34]) by out.ipsmtp3nec.opaltelecom.net with ESMTP; 06 Oct 2015 23:20:18 +0100 Subject: Re: Updated: gcc-5.2.0-1 (Test x86/x86_64) To: cygwin@cygwin.com References: <560BC46D.3060500@gmail.com> <560C0863.70505@tiscali.co.uk> <560C6369.7060602@gmail.com> <560C71FB.4030005@tiscali.co.uk> <560D2F6D.90608@gmail.com> <5613F632.1080205@t-online.de> From: David Stacey Message-ID: <56144922.9020208@tiscali.co.uk> Date: Tue, 06 Oct 2015 22:20:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <5613F632.1080205@t-online.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2015-10/txt/msg00076.txt.bz2 On 06/10/15 17:26, Christian Franke wrote: > cyg Simple wrote: >> On 9/30/2015 7:36 PM, David Stacey wrote: >>> On 30/09/15 23:34, JonY wrote: >>>> On 10/1/2015 00:05, David Stacey wrote: >>>>> On 30/09/15 12:15, JonY wrote: >>>>>> gcc-5.2.0-1 has been uploaded for 32bit and 64bit Cygwin. >>>>>> >>>>>> This is the first series of the 5.x releases, and should be >>>>>> considered >>>>>> as experimental as such. >>>>> Have you managed to work around the ABI change in gcc-5 [1], or will >>>>> this require a mass rebuild at the point gcc-5 becomes 'current'? >>>>> >>>>> [1] -http://developerblog.redhat.com/2015/02/05/gcc5-and-the-c11-abi/ >>>> As far as I know, every gcc release will break C++ ABI, so it would >>>> mean >>>> rebuilding everything C++. >>> According to the Red Hat blog above, the last time g++ caused an ABI >>> change was back in the 3.x days, so it hasn't happened for a while. Ah >>> well, we have maintainers for most packages in Cygwin, so we'll have to >>> co-ordinate a rebuild. >> Regardless, JonY is correct. Every C++ release, regardless of the >> vendor, causes an ABI break with shared libraries and the naming of the >> object elements (mangled names). > > Probably not in this 4.X -> 5.X case. Otherwise the new > cygstdc++-6.dll should IMO be renamed to -6.1, -7 or similar. Bumping the DLL number wouldn't necessarily fix the problem. You'd still run into conflicts if one executable loaded two DLLs, each linked against different versions of libstdc++. Dave. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple