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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Reid, first off thanks *very* much for all your help fixing 2013-related problems. We really appreciate it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Let me propose a target date of September 15 for advancing the minimum MS compiler to VS2015 Update 3. Certainly my team should be ready by then. If anybody
else needs a later date, in particular people who own Windows bots still using VS2013, please speak up.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--paulr<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Reid Kleckner [mailto:rnk@google.com]
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<b>Sent:</b> Wednesday, August 31, 2016 4:07 PM<br>
<b>To:</b> Robinson, Paul<br>
<b>Cc:</b> James Molloy; Nico Weber; llvm-dev; cfe-dev@lists.llvm.org<br>
<b>Subject:</b> Re: [llvm-dev] [cfe-dev] Revisiting our informal policy to support two versions of MSVC<o:p></o:p></span></p>
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<p class="MsoNormal">I'd like to revisit this. As a person who spends a fair amount of time monitoring our VS 2013 buildbots, I would say that I am ready to throw in the towel on MSVC 2013. Since this discussion, I have committed five (!) workarounds for MSVC
2013:<o:p></o:p></p>
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<p class="MsoNormal"># in llvm<o:p></o:p></p>
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<p class="MsoNormal">$ git log --author=rnk --grep=2013 --after='Aug 4 2016' --oneline<o:p></o:p></p>
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<p class="MsoNormal">21a8ade Fix the MSVC 2013 build by using Elf_Word instead of making a local typedef<o:p></o:p></p>
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<p class="MsoNormal">27e101d Revert "Add an optional parameter with a list of undefs to extendToIndices"<o:p></o:p></p>
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<p class="MsoNormal">e8beddd Make vec_fabs.ll pass with MSVC 2013<o:p></o:p></p>
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<p class="MsoNormal">ca77873 [AMDGPU] Give enum an explicit 64-bit type to fix MSVC 2013 failures<o:p></o:p></p>
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<p class="MsoNormal"># in clang<o:p></o:p></p>
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<p class="MsoNormal">$ git log --author=rnk --grep=2013 --after='Aug 4 2016' --oneline<o:p></o:p></p>
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<p class="MsoNormal">18235a5 Try to work around an MSVC 2013 bug around defaulted default ctors<o:p></o:p></p>
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<p class="MsoNormal">I'm pretty sure I'm missing instances where I helped others commit workarounds as well. So, I'd really like to drop 2013, probably sometime next month.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">That said, I'd also like to echo Paul's sentiment that it'd help if people were less adventurous in their uses of C++11. New language features may look nice, but ultimately you may end up wasting my time and yours when I come and revert
your change.<o:p></o:p></p>
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<p class="MsoNormal">On Thu, Aug 4, 2016 at 7:52 AM, Robinson, Paul via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I've heard from another group within Sony that they had "a number of problems" with VS2015 update
2, and strongly recommend going straight to update 3. My immediate team has initiated a request but it hasn't gone through yet.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--paulr</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> James Molloy [mailto:<a href="mailto:james@jamesmolloy.co.uk" target="_blank">james@jamesmolloy.co.uk</a>]
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<b>Sent:</b> Wednesday, August 03, 2016 1:54 AM<br>
<b>To:</b> Nico Weber; Robinson, Paul<br>
<b>Cc:</b> llvm-dev; <a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a><br>
<b>Subject:</b> Re: [cfe-dev] [llvm-dev] Revisiting our informal policy to support two versions of MSVC</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">This sounds like a decent idea to me. However we use 2013 for all our windows builds at the moment and it will take around 2 weeks to upgrade the installations on our cluster. We're
pushing this hard to get it done soon so we don't get caught short, but a grace period would be much appreciated.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Cheers,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">James<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Tue, 2 Aug 2016 at 21:24 Nico Weber via cfe-dev <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Tue, Aug 2, 2016 at 3:49 PM, Robinson, Paul via cfe-dev <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#222222">For my project, timing is everything. We (and I could easily imagine,</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">for many downstream projects) lead time is important.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">In Chromium land, we've so far been able to use the same compiler we use to build Chrome to build clang. Currently that's MSVS2015 update 2, and it took quite a while to update
from 2013 to 2015 due bugs in 2015 and whatnot. So I agree that it's useful to support older MSVS versions for some time. For this reason, requiring update 3 would be inconvenient for us, but 2015u2 would be no problem by now. It would've been a problem if
2015 had been required shortly after it was released.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Nico<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">_______________________________________________<br>
cfe-dev mailing list<br>
<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a><br>
<a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
_______________________________________________<br>
LLVM Developers mailing list<br>
<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a><br>
<a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><o:p></o:p></p>
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