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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - C++11 atomics fail to link"
href="http://llvm.org/bugs/show_bug.cgi?id=19393">19393</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>C++11 atomics fail to link
</td>
</tr>
<tr>
<th>Product</th>
<td>dragonegg
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>baldrick@free.fr
</td>
</tr>
<tr>
<th>Reporter</th>
<td>scott+llvm+bugzilla@pakin.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=12362" name="attach_12362" title="Minimal reproducer, courtesy of Aleksandr Drozd">attachment 12362</a> <a href="attachment.cgi?id=12362&action=edit" title="Minimal reproducer, courtesy of Aleksandr Drozd">[details]</a></span>
Minimal reproducer, courtesy of Aleksandr Drozd
When using std::atomic, this works:
$ g++ -std=c++11 -o atomics atomics.cpp
This doesn't:
$ g++ -fplugin=/usr/local/lib/dragonegg.so -std=c++11 -o atomics
atomics.cpp
/tmp/ccYWBxLQ.o: In function `std::__atomic_base<int>::store(int,
std::memory_order)':
atomics.cpp:(.text._ZNSt13__atomic_baseIiE5storeEiSt12memory_order[_ZNSt13__atomic_baseIiE5storeEiSt12memory_order]+0x44):
undefined reference to `__atomic_store_4'
/tmp/ccYWBxLQ.o: In function
`std::__atomic_base<int>::load(std::memory_order) const':
atomics.cpp:(.text._ZNKSt13__atomic_baseIiE4loadESt12memory_order[_ZNKSt13__atomic_baseIiE4loadESt12memory_order]+0x38):
undefined reference to `__atomic_load_4'
collect2: error: ld returned 1 exit status
Here's what I'm running:
$ g++ --version | head -1
g++ (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
$ svn info | grep Revision
Revision: 205933
$ uname -a
Linux morbo 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
I've attached a minimal reproducer.
Thanks in advance for your attention,
-- Scott</pre>
</div>
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