X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:message-id:date:from:mime-version:to:subject :references:in-reply-to:content-type:content-transfer-encoding; q=dns; s=default; b=IYLvW2PAfV5dQpeFCtzf7O+TF6hPRe5HAmP38FuSft6 Thxer5l9xd2uxSz6YeFw3ElLQuBlfA8pzT/4LGo72skDADCpjKhS989gsBpGfrOH g9weHyeP5oxUmU4cSLynyq5U/weTRmZ4l1KQriStqxz6L4+HAxzl3N+HHCOFJ3Yw = DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:message-id:date:from:mime-version:to:subject :references:in-reply-to:content-type:content-transfer-encoding; s=default; bh=+JVw0kt23AToiVej0KJlZ23Ziyw=; b=bnIMkO0hBbgRL8pDz Ga+txg09xjnzndTYpByHaFZaXzmJNONNbUBReofg8/RVdgASuyaclbylM9KhkErG 2QCqqxG5Dev8GXbD5WKI2eKSHzSffobhuv/epGBO9fYQMETwpu3bsjnJIQOqTxoG 4yFwzTk0p7aout1sJQlx9qL9gU= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,FREEMAIL_REPLY,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=no version=3.3.2 X-HELO: mail-wi0-f174.google.com X-Received: by 10.194.92.244 with SMTP id cp20mr1307802wjb.109.1404674345764; Sun, 06 Jul 2014 12:19:05 -0700 (PDT) Message-ID: <53B9A123.6030703@gmail.com> Date: Sun, 06 Jul 2014 21:18:59 +0200 From: Marco Atzeri User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: cygwin AT cygwin DOT com Subject: Re: rebaseall breaks some packages(?) References: <53B91501 DOT 18796CB7 AT boland DOT nl> <167898398 DOT 20140706223456 AT yandex DOT ru> In-Reply-To: <167898398.20140706223456@yandex.ru> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes On 06/07/2014 20:34, Andrey Repin wrote: > Greetings, D. Boland! > > >> My students (100+) repeatedly got these errors, than eventually they should ask help here.. >> What's the deal with this "rebasing" anyway? Every compiler has a built-in >> mechanism to create unique offsets. Windows itself also rebases binaries at >> load-time. > > Windows and POSIX models require different load techniques. > Cygwin provide POSIX compatibility layer. On Posix the fork is a fundamental function. Fork requires that all dll's on children process are reloaded at the same address used in the father process. Windows make this very difficult and rebase align dll loading spaces in NOT overlapping ones making collision and fork failures more unlikely. >> On the other hand, why not rebase at compile-time? on 32 bit, we will not have enough space anyway. On both platform we should syncronize all the package maintainers at a certain point for all distributed shared library, titanic job and useless as the first upgrade of any shared library package will require likely a different address space. >> Rebasing should not be the responsibility of the user, but of the developer. It is currently done by setup. But sometime things go wrong and a you need a fresh restart. Think of it like car tires, usually you don't touch them but if the tire breaks you need to change it. > Cygwin users are developers. That's the intended audience, anyway. That is clearly a wrong assumptions. If our user were all developers we will be very few. I expect very few users of my packages to be software developers > -- > WBR, > Andrey Repin (anrdaemon AT yandex DOT ru) 06.07.2014, <22:18> Regards Marco -- 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