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<p class="MsoNormal">Interesting. I’ve always heard that “Ninja is faster” but never seen actual numbers before, so I appreciate you taking the time to post them. That said, ~10 extra minutes with cl.exe/msbuild for a full rebuild is a price that I personally
am willing to pay to be able to use the visual studio debugger.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hopefully you get /MP support for clang-cl soon. Visual Studio is my preferred development environment for C++, so anything that makes that situation better with open source tools is a win in my book.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> Alexandre Ganea <alexandre.ganea@ubisoft.com> <br>
<b>Sent:</b> Friday, April 10, 2020 4:05 PM<br>
<b>To:</b> Alexandre Ganea <alexandre.ganea@ubisoft.com>; Chris Tetreault <ctetreau@quicinc.com>; Sudhindra kulkarni <sudhindrakkulkarni102@gmail.com><br>
<b>Subject:</b> [EXT] RE: [llvm-dev] Running clang tests<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-CA">Even when using cl.exe there’s a significant difference between MSBuild and Ninja, as you can see in the figures in the review.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="FR">De :</span></b><span lang="FR"> llvm-dev <<a href="mailto:llvm-dev-bounces@lists.llvm.org">llvm-dev-bounces@lists.llvm.org</a>>
<b>De la part de</b> Alexandre Ganea via llvm-dev<br>
<b>Envoyé :</b> April 10, 2020 6:47 PM<br>
<b>À :</b> Chris Tetreault <<a href="mailto:ctetreau@quicinc.com">ctetreau@quicinc.com</a>>; Sudhindra kulkarni <<a href="mailto:sudhindrakkulkarni102@gmail.com">sudhindrakkulkarni102@gmail.com</a>><br>
<b>Cc :</b> LLVM Dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>><br>
<b>Objet :</b> Re: [llvm-dev] Running clang tests<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA">Chris,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">We are fixing the issues :-) clang-cl doesn’t currently support /MP which makes building of each project single-threaded with MSBuild. I have a patch ongoing here:
<a href="https://reviews.llvm.org/D52193">https://reviews.llvm.org/D52193</a> – I am working on it since last week to iron out the last issues, I’ll update it soon.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Without that you have to resort to increasing the “maximum number of parallel builds” to a higher value than the default 2.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="FR">De :</span></b><span lang="FR"> Chris Tetreault <<a href="mailto:ctetreau@quicinc.com">ctetreau@quicinc.com</a>>
<br>
<b>Envoyé :</b> April 10, 2020 6:36 PM<br>
<b>À :</b> Alexandre Ganea <<a href="mailto:alexandre.ganea@ubisoft.com">alexandre.ganea@ubisoft.com</a>>; Sudhindra kulkarni <<a href="mailto:sudhindrakkulkarni102@gmail.com">sudhindrakkulkarni102@gmail.com</a>><br>
<b>Cc :</b> LLVM Dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>><br>
<b>Objet :</b> RE: [llvm-dev] Running clang tests<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> I’d just like to interject to say that building within Visual Studio isn’t really that bad. Running the lit tests is a bit painful because the LLVM build tools that are integrated with the build system don’t play nice with msbuild. Particularly,
I’ve never been able to actually cancel an invocation of lit or tablegen via visual studio. That said, there is a huge upside to building with Visual Studio: actually being able to use the debugger.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> Honestly, I find this “just use ninja” attitude frustrating and troubling. If there are pain points with using MSVC or make or whatever, we should be trying to fix then, not just throwing our hands up in the air giving up. In my opinion,
most of the issues surrounding using make or msbuild stem from the fact that nobody is using these build systems, so nobody is fixing the issues. I feel that we should be encouraging people to use the build system that they prefer, and encouraging people to
fix the build system to work well with their chosen build system. This is the only way that things will get better.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> Sudhindra, to answer your question, I would also recommend upgrading to Visual Studio 2019 if you can. I just tried to directly run ASTMatcherTests from Visual Studio 2019 and it worked for me. I have no experience with the GTest IDE
plugin, I’ve always just ran GTest binaries directly. There’s also a check-clang (I think that’s the one you want. It might be called something else but it’s definitely there) target in there that is equivalent to the Ninja check-clang target. These check
targets are weird because to run them you have to do “build” from Visual Studio. If you try to actually run the target it won’t work. This is one of those things that would probably get fixed if people actually used the LLVM Visual Studio project.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"> Christopher Tetreault<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> llvm-dev <<a href="mailto:llvm-dev-bounces@lists.llvm.org">llvm-dev-bounces@lists.llvm.org</a>>
<b>On Behalf Of </b>Alexandre Ganea via llvm-dev<br>
<b>Sent:</b> Friday, April 10, 2020 1:35 PM<br>
<b>To:</b> Sudhindra kulkarni <<a href="mailto:sudhindrakkulkarni102@gmail.com">sudhindrakkulkarni102@gmail.com</a>>; LLVM Dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>><br>
<b>Subject:</b> [EXT] Re: [llvm-dev] Running clang tests<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-CA">Hi,<br>
<br>
LLVM requires Visual Studio 2017 or 2019: </span><a href="https://llvm.org/docs/GettingStartedVS.html#software"><span lang="EN-CA">https://llvm.org/docs/GettingStartedVS.html#software</span></a><span lang="EN-CA"> – you could use Community 2019.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">I don’t recommend building LLVM inside Visual Studio. However you can generate or update the VS solution once in a while:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span lang="EN-CA">mkdir buildVS && cd buildVS<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo3"><span lang="EN-CA">cmake {your_llvm_root}/llvm -G"Visual Studio 16 2019" -Thost=x64 -DLLVM_ENABLE_PROJECTS=clang;llvm -DLLVM_OPTIMIZED_TABLEGEN=ON<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Use Ninja instead for building: </span><a href="https://ninja-build.org/"><span lang="EN-CA">https://ninja-build.org/</span></a><span lang="EN-CA"> it’s a lot faster - keep Visual Studio only for debugging.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Ensure ninja.exe is in %PATH%.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-CA">From a Visual Studio shell (“x64 Native Tools Command Prompt for VS 2019” in the Start menu) run the following:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo6"><span lang="EN-CA">mkdir buildNinjaRel && cd buildNinjaRel<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo6"><span lang="EN-CA">cmake {your_llvm_root}/llvm -G"Ninja" -DLLVM_ENABLE_PROJECTS=clang;llvm -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLLVM_OPTIMIZED_TABLEGEN=ON<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo6"><span lang="EN-CA">ninja check-all<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">You can then debug the test in VS: {your_llvm_root}\buildNinjaRel\tools\clang\unittests\ASTMatchers\ASTMatchersTests.exe<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-CA"><br>
Then re-run “ninja check-clang-unit” or just “ninja” if you want to iterate on code changes.<br>
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Best,<br>
Alex.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="FR">De :</span></b><span lang="FR"> llvm-dev <</span><a href="mailto:llvm-dev-bounces@lists.llvm.org"><span lang="FR">llvm-dev-bounces@lists.llvm.org</span></a><span lang="FR">>
<b>De la part de</b> Sudhindra kulkarni via llvm-dev<br>
<b>Envoyé :</b> April 10, 2020 6:42 AM<br>
<b>À :</b> </span><a href="mailto:llvm-dev@lists.llvm.org"><span lang="FR">llvm-dev@lists.llvm.org</span></a><span lang="FR"><br>
<b>Objet :</b> [llvm-dev] Running clang tests<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA">Hi Team,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"> I have checked out the clang and llvm source code and built the executables using the visual studio 2015 community edition. I am using Windows as my platform.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA">However I see that there are some test cases under the clang test folder in the LLVM.sln. Eg AstMatcherTest,ASTTests etc. I see that these tests make use of the Google test framework. <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA">In my visual studio I have installed Google Test Adapter extension for running the Google tests.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA">But the tests under </span><span lang="EN-CA" style="font-family:"Arial",sans-serif">AstMatcherTest,ASTTests projects won't show up in the Test Explorer view in visual studio even after building these projects.So I wanted
to know the reason for the same. </span><span lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA" style="font-family:"Arial",sans-serif">So can you please let me know if it possible to run these tests in visual studio. If not how to run them.</span><span lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA" style="font-family:"Arial",sans-serif">Thanks in advance.</span><span lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA" style="font-family:"Arial",sans-serif">Thanks and Regards </span><span lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA" style="font-family:"Arial",sans-serif">Sudhindra Kulkarni </span><span lang="EN-CA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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