<html>
<head>
<base href="http://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang cannot parse MSVC's <atomic> header due to C11 _Atomic keyword clash"
href="http://llvm.org/bugs/show_bug.cgi?id=19043">19043</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Clang cannot parse MSVC's <atomic> header due to C11 _Atomic keyword clash
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rnk@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>benny.kra@gmail.com, chandlerc@gmail.com, david.majnemer@gmail.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The fallacy of the implementers namespace strikes back!
MSVC has a template class named "_Atomic" in <atomic>, despite the fact that
it's a C11 keyword. So far as we know, MSVC only aims to implement C99, so
this clash isn't a problem for them. libc++ apparently uses _Atomic if it's
available, which means we probably can't build a compatibility mode that works
for both the MSVC STL and libc++. We could use the -stdlib= flag to decide
whether to provide the _Atomic keyword, but either way the user has to pass
flags and that is sad.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>