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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Warning for ODR violation"
href="https://llvm.org/bugs/show_bug.cgi?id=23159">23159</a>
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<th>Summary</th>
<td>Warning for ODR violation
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<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
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<th>Reporter</th>
<td>hfinkel@anl.gov
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Richard provided to me this example showing ODR violation:
#include <utility>
// implicitly internal linkage due to 'const'
const int n = 5;
// odr violation, captures n by reference
inline auto f() { return std::make_pair(n, 3); }
// much more obvious odr violation, takes address of n
inline auto g() {
static const int *p = &n;
return p;
}
Clang compiles this, however, without issuing any warnings. Taking the address
of a variable with internal linkage in an inline function is probably not a
good idea.</pre>
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