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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 - lld fails to find math symbols like __exp_finite under certain conditions"
href="https://bugs.llvm.org/show_bug.cgi?id=45769">45769</a>
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<th>Summary</th>
<td>lld fails to find math symbols like __exp_finite under certain conditions
</td>
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<tr>
<th>Product</th>
<td>lld
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<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>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>All Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>moritz@bunkus.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, smithp352@googlemail.com
</td>
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<div>
<pre>My OS & clang version: clang & lld 10.0.0 on Arch Linux (fully updated system
as of 2020-05-01 09:00 CEST); clang & lld are Arch Linux's packages
This is similar to #45034. Here's how to reproduce:
1. Install the Ogg & Vorbis libraries
2. Create the following short test.cpp file:
#include <vorbis/codec.h>
int main(int argc,char **argv)
{
vorbis_info m_vi;
vorbis_info_init(&m_vi);
return 0;
}
3. Try to compile & link with lld & observe errors:
[0 mosu@sweet-chili ~/tmp] clang++ -fuse-ld=lld -o test test.cpp -lvorbis -logg
ld.lld: error:
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib64/libvorbis.so:
undefined reference to __acosf_finite
ld.lld: error:
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib64/libvorbis.so:
undefined reference to __exp_finite
ld.lld: error:
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib64/libvorbis.so:
undefined reference to __pow_finite
ld.lld: error:
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/9.3.0/../../../../lib64/libvorbis.so:
undefined reference to __log_finite
clang-10: error: linker command failed with exit code 1 (use -v to see
invocation)
[1 mosu@sweet-chili ~/tmp]
Interesting observations:
1. Compiling & linking works fine if I omit "-logg":
[0 mosu@sweet-chili ~/tmp] clang++ -fuse-ld=lld -o test test.cpp -lvorbis
[0 mosu@sweet-chili ~/tmp]
2. Compiling & linking works fine with GNU ld even with "-logg":
[0 mosu@sweet-chili ~/tmp] clang++ -o test test.cpp -lvorbis -logg
[0 mosu@sweet-chili ~/tmp]
3. Explicitly adding "-lm" on top of "-lvorbis -logg" does not change the
output; it fails the same way.</pre>
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