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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - undefined symbol when a static constexpr field is defined in the class body"
href="https://bugs.llvm.org/show_bug.cgi?id=46663">46663</a>
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<th>Summary</th>
<td>undefined symbol when a static constexpr field is defined in the class body
</td>
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<th>Product</th>
<td>clang
</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>FreeBSD
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>yuri@tsoft.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23711" name="attach_23711" title="bug.cpp">attachment 23711</a> <a href="attachment.cgi?id=23711&action=edit" title="bug.cpp">[details]</a></span>
bug.cpp
Compiling the attached code fails:
<span class="quote">> $ c++ -o bug bug.cpp
> ld: error: undefined symbol: C::c
> >>> referenced by bug.cpp
> >>> /tmp/bug-9480f8.o:(C::s())
> c++: error: linker command failed with exit code 1 (use -v to see invocation)</span >
The field "static constexpr float c = 1;" should always lead to symbol "c"
being defined.
Replacing the return type with "float" and returning just "c" makes the problem
go away.
Observed for clang-9.0.1 and clang-11.0.d20200519
OS: FreeBSD 12.1</pre>
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