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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Note that the minimum version of "Visual Studio 2017" is not "any old Visual Studio 2017" because I just tripped over that.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The cmake configuration wants version 19.1 or later, so 19.0 is not sufficient.<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>JF Bastien via llvm-dev<br>
<b>Sent:</b> Friday, February 08, 2019 1:16 PM<br>
<b>To:</b> via llvm-dev; cfe-dev<br>
<b>Subject:</b> [llvm-dev] [PSA] minimum toolchain update completed<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello compiler fans!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">As <a href="http://lists.llvm.org/pipermail/llvm-dev/2019-January/129452.html">discussed in the RFC</a>, LLVM’s cmake configuration now soft-errors if you use an older toolchain to build. The new minimums are:<o:p></o:p></p>
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* Clang 3.5<br>
* Apple Clang 6.0<br>
* GCC 5.1<br>
* Visual Studio 2017<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">You can opt-out of the soft-error with <span style="font-family:"Courier New"">LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN</span>. You’ll still want to update your toolchain because that soft-error will become a hard-error once we move away from
C++11, and we would truly miss you. I will send another RFC for this migration away from C++11 at the end of March 2019.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Happy compiling!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">JF<o:p></o:p></p>
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