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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - multiplying long long with fsanitize=integer fails with undefined reference to __mulodi4"
href="http://llvm.org/bugs/show_bug.cgi?id=17693">17693</a>
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<th>Summary</th>
<td>multiplying long long with fsanitize=integer fails with undefined reference to __mulodi4
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ebacon@shaw.ca
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Multiplying two long long integers fails when using -fsanitze=integer:
$ cat tst.c
#include <stdlib.h>
int main(int argc, char **argv)
{
long long x = atoi(argv[1]);
long long y = atoi(argv[2]);
long long z = x * y;
return 0;
}
$ clang --version
clang version 3.4 (trunk 193413)
Target: i386-pc-linux-gnu
Thread model: posix
$ clang -fsanitize=integer tst.c
/tmp/tst-f4b367.o: In function `main':
tst.c:(.text+0x82): undefined reference to `__mulodi4'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
$ clang tst.c
$
This works on x86_64, though, but not when using -m32:
x86-64 $ clang --version
clang version 3.4 (trunk 193417)
Target: x86_64-unknown-linux-gnu
Thread model: posix
x86-64 $ clang -fsanitize=integer -m32 tst.c
/tmp/tst-723c9c.o: In function `main':
tst.c:(.text+0x82): undefined reference to `__mulodi4'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
x86-64 $ clang -fsanitize=integer tst.c
x86-64 $ clang -m32 tst.c
x86-64 $
Perhaps related to <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - undefined reference to '__mulodi4'"
href="show_bug.cgi?id=14469">http://llvm.org/bugs/show_bug.cgi?id=14469</a> ?</pre>
</div>
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