From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 100727 invoked by alias); 27 May 2016 03:05:17 -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 100365 invoked by uid 89); 27 May 2016 03:04:30 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=0.3 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,KAM_COUK,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=no version=3.3.2 spammy=fifteen, H*R:D*yahoo.co.uk, H*F:D*yahoo.co.uk, staff X-HELO: nm50-vm5.bullet.mail.ne1.yahoo.com Received: from nm50-vm5.bullet.mail.ne1.yahoo.com (HELO nm50-vm5.bullet.mail.ne1.yahoo.com) (98.138.121.149) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-SHA encrypted) ESMTPS; Fri, 27 May 2016 03:04:20 +0000 Received: from [127.0.0.1] by nm50.bullet.mail.ne1.yahoo.com with NNFMP; 27 May 2016 03:04:18 -0000 Received: from [98.138.226.179] by nm50.bullet.mail.ne1.yahoo.com with NNFMP; 27 May 2016 03:01:28 -0000 Received: from [212.82.98.53] by tm14.bullet.mail.ne1.yahoo.com with NNFMP; 27 May 2016 03:01:28 -0000 Received: from [212.82.98.75] by tm6.bullet.mail.ir2.yahoo.com with NNFMP; 27 May 2016 03:01:28 -0000 Received: from [127.0.0.1] by omp1012.mail.ir2.yahoo.com with NNFMP; 27 May 2016 03:01:28 -0000 Received: from jws11161.mail.ir2.yahoo.com by sendmailws161.mail.ir2.yahoo.com; Fri, 27 May 2016 03:01:27 +0000; 1464318087.624 Date: Fri, 27 May 2016 08:19:00 -0000 From: Reply-To: To: Stephen John Smoogen , "cygwin@cygwin.com" Message-ID: <1871468680.106497.1464318087251.JavaMail.yahoo@mail.yahoo.com> In-Reply-To: References: <538382235.210794.1464156496492.JavaMail.yahoo.ref@mail.yahoo.com> <538382235.210794.1464156496492.JavaMail.yahoo@mail.yahoo.com> Subject: Re: changes in 32-bit Cygwin OpenGL causing crashes? MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SW-Source: 2016-05/txt/msg00343.txt.bz2 It's odd, the amount of extra support that Cygwin needs. Okay, OpenGL is broken in 32-bit cygwin, not for the first time. I'm unsure if OpenGL is broken in 64-bit cygwin, because the piping my applications use is broken in 64-bit cygwin - and only there. Not in any other linux or unix I've run on. So, it's rather tempting to blame 64-bit Cygwin. But the OpenGL code is clearly obviously different and later in 64-bit Cygwin, because it builds to different function names (dropped a bunch of EXTs.) That's... odd. But in any case, we have a -noopengl flag just to work around OpenGL segfaulting in 32-bit Cygwin (and whether 64-bit segfaults is unknown, because piping problems.). And there are graphical glitches I see in 32-bit Cygwin Tcl/Tk, but not in 64-bit Cygwin Tcl/Tk or anywhere else, 32- or 64-bit, in Linux/Unix land. Those are the major things that come to mind when I think of Cygwin. Notes at: http://sat-net.com/L.Wood/software/SaVi/building-under-Windows/ where I try and suggest to users that Cygwin is not their best choice. Really. It's been over fifteen years of 'under construction' so far. Lloyd Wood http://savi.sf.net ----- Original Message ----- From: Stephen John Smoogen To: lloyd.wood@yahoo.co.uk; cygwin@cygwin.com Sent: Thursday, 26 May 2016, 2:09 Subject: Re: changes in 32-bit Cygwin OpenGL causing crashes? On 25 May 2016 at 02:08, wrote: >> It seems still the same problem with dri-drivers >> https://sourceware.org/ml/cygwin/2016-04/msg00283.html >> >> probably caused by LLVM 3.7 > > Unfortunately, the dri-driver versions available in the installer > depend on LLVM 3.7, so, even though reverting back to LLVM 3.5 > is offered when you select llvm, you can't pull in a dri-driver > that works with that older version of LLVM to test that hypothesis. > So, not much point to offering that older version of LLVM. > dri-driver via LLVM is a hack on top of a hack on top of a hack as the developer of the software will tell you. It works in the use cases he develops for but outside of that you are very much all alone. So even trying to have a 'known' good is hard for this because what worked on your laptop/system may not work at all on any other one. Heck it might not even work when the Windows OS underneath does an update even though the hardware worked. To quote the road sign Expect problems. Road construction ahead. If you are needing better stability then you need to staff up somewhere to have people to fix those problems. > Regardless of the fact that OpenGL is broken (again), this is > really a problem with Cygwin as a perennial work-in-progress > and its (lack of) version control. > > I'd like to be able to download a stable-known-to-work-on > a-specified date golden-master Cygwin, without incremental > upgrades, and revert to that known-to-work Cygwin if needs > be. Once every six months? I'd be good with that. > > Lloyd Wood > http://savi.sf.net/ > > -- > 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 > -- Stephen J Smoogen. -- 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