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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Clang should be setting up the usual preprocessor defines based on the target. So, you can bracket chunks of C/C++ source in a lit test with #if to guard target-dependent
stuff. Charles Li has been updating a bunch of tests to have sections guarded by tests on the value of __cplusplus, for example (e.g. see r266239).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you're asking about conditionally executing RUN lines, I don't think there's a way to do that; you'd need to split the new stuff into its own file and use
REQUIRES to set the correct conditions.<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>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></a></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""> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b><Alexander G. Riccio> via llvm-dev<br>
<b>Sent:</b> Wednesday, April 13, 2016 1:56 PM<br>
<b>To:</b> llvm-dev<br>
<b>Subject:</b> [llvm-dev] lit conditional compilation/checking?<o:p></o:p></span></p>
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<p class="MsoNormal">How can I platform-conditionally compile/check sections of code with lit? Can I rely on preprocessor defines like _WIN32?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Specifically, I'm adding new tests to existing lit tests, but the new tests should only be compiled and run on Windows.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Sincerely,<br>
Alexander Riccio<br>
--<br>
"Change the world or go home."</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><a href="http://about.me/ariccio" target="_blank">about.me/ariccio</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt"><a href="http://about.me/ariccio" target="_blank"><br>
</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">If left to my own devices, I will build more.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"MS Mincho"">⁂</span><span style="font-size:9.5pt"><o:p></o:p></span></p>
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