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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Wanted: portability warning for bitfield declared as 'int' in C"
href="https://llvm.org/bugs/show_bug.cgi?id=29019">29019</a>
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<th>Summary</th>
<td>Wanted: portability warning for bitfield declared as 'int' in C
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jordan_rose@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>C11 6.7.2p5: Each of the comma-separated multisets designates the same type,
except that for bit-fields, it is implementation-defined whether the specifier
`int` designates the same type as `signed int` or the same type as `unsigned
int`.
When compiling C code, Clang should have a warning if you use a bare 'int' as
the type of a bitfield.
struct Test {
int x: 5; // warn here
};</pre>
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