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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Clang] Wrong code for re-definition of builtin function"
href="https://bugs.llvm.org/show_bug.cgi?id=37082">37082</a>
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<th>Summary</th>
<td>[Clang] Wrong code for re-definition of builtin function
</td>
</tr>
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<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>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>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>yangyibiao@nju.edu.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>$ clang -v
$ cat small.c
#include <stdio.h> // #1
static int strcmp(){return 20;} // #2
#define strcmp __builtin_strcmp // #3
int main()
{
int ret = strcmp("a","b");
printf("%d\n", ret);
return 0;
}
$ clang small.c; ./a.out
20
$ gcc small.c; ./a.out
-1
###
Since strcmp is re-defined in Line # 3, therefore, the correct output should be
-1.</pre>
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