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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang 5.0.0 RC2 doesn't recognize DevDiv internal builds of MSVC"
href="https://bugs.llvm.org/show_bug.cgi?id=34269">34269</a>
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<th>Summary</th>
<td>Clang 5.0.0 RC2 doesn't recognize DevDiv internal builds of MSVC
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>5.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>release blocker
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Driver
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>sfinae@hotmail.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
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<pre>Mail thread: <a href="https://lists.llvm.org/pipermail/cfe-dev/2017-August/055022.html">https://lists.llvm.org/pipermail/cfe-dev/2017-August/055022.html</a>
Fixed in master by r311391: <a href="https://reviews.llvm.org/D36860">https://reviews.llvm.org/D36860</a>
To summarize, there's a regression between Clang 4.0.1 and 5.0.0 RC2, where
Clang no longer recognizes the DevDiv-internal directory structure of MSVC
builds. This makes it more difficult for us to test MSVC's STL with Clang (such
testing helps us avoid writing code that unintentionally depends on
non-Standard behavior of C1XX, and also helps us find bugs in Clang).
While I figured out a workaround for this regression (explicitly pass
-fms-compatibility-version and invoke link.exe separately), it would be great
if the fix r311391 could be merged into 5.0.0.</pre>
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