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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - const variables defined with __delspec(dll export)"
href="https://bugs.llvm.org/show_bug.cgi?id=32991">32991</a>
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<th>Summary</th>
<td>const variables defined with __delspec(dll export)
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zahira.ammarguellat@intel.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>In Microsoft C++ mode with microsoft_version >= 1400, const variables defined
in namespace scope, have external linkage by default if the variable was
declared with __declspec(dllexport).
ksh-3.2$ cat test.cpp
__declspec(dllexport) int const x = 3;
ksh-3.2$ cl -c test.cpp
Microsoft (R) C/C++ Optimizing Compiler Version 19.00.24215.1 for x64
Copyright (C) Microsoft Corporation. All rights reserved.
test.cpp
ksh-3.2$ clang -v
clang version 5.0.0 (cfe/trunk 302180)
Target: x86_64-pc-windows-msvc
Thread model: posix
ksh-3.2$ clang -c test.cpp
test.cpp:1:33: error: 'x' must have external linkage when declared 'dllexport'
__declspec(dllexport) int const x = 3;
^
1 error generated.
ksh-3.2$</pre>
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