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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 --- - Error on redefinition of builtin functions."
href="https://llvm.org/bugs/show_bug.cgi?id=24623">24623</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Error on redefinition of builtin functions.
</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>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
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<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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chengniansun@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>I declare a variable with the name "rint", which accidentally is a builtin
function. Then clang rejects the code, although I do not include the header
file <math.h>.
Even though this behavior was deliberate, the message is still confusing,
"tmp.c:1:5: note: previous definition is here", as the first line is not the
the location of the previous definition.
$ clang-trunk -O0 -c tmp.c
tmp.c:1:5: error: redefinition of 'rint' as different kind of symbol
int rint;
^
tmp.c:1:5: note: previous definition is here
1 error generated.
$
$ gcc-trunk -O0 -c tmp.c
tmp.c:1:5: warning: built-in function ‘rint’ declared as non-function
int rint;
^
$
$ cat tmp.c
int rint;
$</pre>
</div>
</p>
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