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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang-cl fails to compile atlctrlw.h header from WTL"
href="https://llvm.org/bugs/show_bug.cgi?id=26738">26738</a>
</td>
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<th>Summary</th>
<td>clang-cl fails to compile atlctrlw.h header from WTL
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<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>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>andreybokhanko@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>A small reproducer is:
class CCommandBarCtrlImpl {
public:
enum { _nMaxMenuItemTextLength = 100 };
};
void foo(CCommandBarCtrlImpl *pT) {
char szString[pT->_nMaxMenuItemTextLength] = { 0 };
}
$ clang-cl H:/aero.cpp -c
H:/aero.cpp(7,17) : error: variable-sized object may not be initialized
char szString[pT->_nMaxMenuItemTextLength] = { 0 };
^~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
Both MS and GCC compilers compile the test fine:
$ cl H:/aero.cpp -c
Microsoft (R) C/C++ Optimizing Compiler Version 18.00.31101 for x64
Copyright (C) Microsoft Corporation. All rights reserved.
aero.cpp
$ echo $?
0
This construct is used in atlctrlw.h header from Windows Template Library:
(<a href="https://sourceforge.net/p/wtl/code/HEAD/tree/trunk/wtl/Include/atlctrlw.h#l1309">https://sourceforge.net/p/wtl/code/HEAD/tree/trunk/wtl/Include/atlctrlw.h#l1309</a>):
TCHAR szString[pT->_nMaxMenuItemTextLength] = { 0 };
nMaxMenuItemTextLength is defined at line 239 of the same header:
enum
{
_nMaxMenuItemTextLength = 100,
_chChevronShortcut = _T('/')
};
Yours,
Andrey
======
Software Engineer
Intel Compiler Team</pre>
</div>
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