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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Cherry-pick 76fc35752d19ac605c1c1fd757af9c7c3bb4a906 to release/12.x"
href="https://bugs.llvm.org/show_bug.cgi?id=50758">50758</a>
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</tr>
<tr>
<th>Summary</th>
<td>Cherry-pick 76fc35752d19ac605c1c1fd757af9c7c3bb4a906 to release/12.x
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++
</td>
</tr>
<tr>
<th>Version</th>
<td>12.0
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ldionne@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr>
<tr>
<th>Blocks</th>
<td>49317
</td>
</tr></table>
<p>
<div>
<pre>That is:
[libc++] Make feature-test macros consistent with availability macros
Before this patch, feature-test macros didn't take special availability
markup into account, which means that feature-test macros can sometimes
appear to "lie". For example, if you compile in C++20 mode and target
macOS 10.13, the __cpp_lib_filesystem feature-test macro will be provided
even though the <filesystem> declarations are marked as unavailable.
This patch fixes that.
rdar://68142369
Differential Revision: <a href="https://reviews.llvm.org/D94983">https://reviews.llvm.org/D94983</a></pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - [meta] 12.0.1 Release Blockers"
href="https://bugs.llvm.org/show_bug.cgi?id=49317">Bug 49317</a>] [meta] 12.0.1 Release Blockers
</li>
</ul>
</div>
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