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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang tries to use 128-bit function __multi3 on 32-bit target"
href="http://llvm.org/bugs/show_bug.cgi?id=20871">20871</a>
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<th>Summary</th>
<td>clang tries to use 128-bit function __multi3 on 32-bit target
</td>
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<th>Product</th>
<td>new-bugs
</td>
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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>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>tor.klingberg@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13004" name="attach_13004" title="The C source file that triggers the bug">attachment 13004</a> <a href="attachment.cgi?id=13004&action=edit" title="The C source file that triggers the bug">[details]</a></span>
The C source file that triggers the bug
When I try to compile a certain short C-file with clang for a 32-bit i386
target with optimization, I get this linker error:
/tmp/addup-b0948d.o:/home/tor/c/addup.c:function addup: error: undefined
reference to '__multi3'
As I understand it, __multi3 is a 128-bit function, and not available on 32-bit
i386. The C source does not use and 128-bit types, only 64-bit.
With the versions of clang-3.4 and 3.5 in the Ubuntu repositories, clang
segfaults instead. Reported here:
<a href="https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-snapshot/+bug/1365701">https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-snapshot/+bug/1365701</a></pre>
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