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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang 3.7 requires a definition of an unused variable if -g option is specified"
href="https://llvm.org/bugs/show_bug.cgi?id=22902">22902</a>
</td>
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<th>Summary</th>
<td>clang 3.7 requires a definition of an unused variable if -g option is specified
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>All
</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>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>kariya_mitsuru@hotmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=14044" name="attach_14044" title="clang++ -v">attachment 14044</a> <a href="attachment.cgi?id=14044&action=edit" title="clang++ -v">[details]</a></span>
clang++ -v
The sample code below is compiled and linked successfully if -g option is not
specified but it causes a linkage error if -g option is specified.
================ sample code ================
extern char dummy;
template<char&>
void f() {}
int main()
{
f<dummy>();
}
================ sample code ================
with -g option: <a href="http://melpon.org/wandbox/permlink/Bt83IkZr8Mu1bW9s">http://melpon.org/wandbox/permlink/Bt83IkZr8Mu1bW9s</a>
w/o -g option: <a href="http://melpon.org/wandbox/permlink/0Rgoup5odwqIrDju">http://melpon.org/wandbox/permlink/0Rgoup5odwqIrDju</a>
Note that clang 3.3 compiles and links it successfully even though -g option is
specified.
cf. <a href="http://melpon.org/wandbox/permlink/iXtqIsBEkDBOXhpL">http://melpon.org/wandbox/permlink/iXtqIsBEkDBOXhpL</a></pre>
</div>
</p>
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