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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Modules TS] libc++ multiple symbol definitions"
href="https://bugs.llvm.org/show_bug.cgi?id=34068">34068</a>
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<th>Summary</th>
<td>[Modules TS] libc++ multiple symbol definitions
</td>
</tr>
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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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Modules
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>boris@codesynthesis.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<p>
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<pre>When trying to link two object files corresponding to two module implementation
units I get duplicate symbol errors like this:
libbutl/sha256.so.o:(.rodata+0x1a): multiple definition of
`std::__1::adopt_lock'
libbutl/base64.so.o:(.rodata+0x1a): first defined here
libbutl/sha256.so.o:(.rodata+0x18): multiple definition of
`std::__1::defer_lock'
libbutl/base64.so.o:(.rodata+0x18): first defined here
libbutl/sha256.so.o:(.rodata+0x19): multiple definition of
`std::__1::try_to_lock'
libbutl/base64.so.o:(.rodata+0x19): first defined here
libbutl/sha256.so.o:(.rodata+0x1b): multiple definition of
`std::__1::placeholders::_1'
libbutl/sha256.so.o:(.rodata+0x10): multiple definition of
`std::__1::__find_detail::__ambiguous'
libbutl/base64.so.o:(.rodata+0x10): first defined here
libbutl/sha256.so.o:(.rodata+0x8): multiple definition of
`std::__1::__find_detail::__not_found'
libbutl/base64.so.o:(.rodata+0x8): first defined here
libbutl/sha256.so.o:(.rodata+0x1): multiple definition of
`std::__1::allocator_arg'
libbutl/base64.so.o:(.rodata+0x1): first defined here
libbutl/sha256.so.o:(.rodata+0x0): multiple definition of
`std::__1::piecewise_construct'
libbutl/base64.so.o:(.rodata+0x0): first defined here
Making a reproducer is quite tedious (modules are a real pain without good
build system support). But I could give a link to the sources as well as the
entire compilation log if that would be helpful.</pre>
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