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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 --- - multiple definitions of static variables inside functions" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23838&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=qqUl17T1JtVDwVRGOSWh2HKsjFxHCeQ7yuhMouxCF74&s=HtJBvuopO3fORffKJK6dR1MRCOj3X2gWH_e1EM0ZVPQ&e=">23838</a>
</td>
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<th>Summary</th>
<td>multiple definitions of static variables inside functions
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</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>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>heavenandhell171@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Clang is not generating comdats for static variables of classes with virtual
members.
$ cat > h.h
class error_category {
public:
virtual void fn() {}
};
inline error_category& make_error_code() {
static error_category C;
return C;
}
$ cat > t1.cpp
#include "h.h"
int main(int argc, char **argv) {
make_error_code();
return 0;
}
$ cat > t2.cpp
#include "h.h"
void foo() {
make_error_code();
}
$ clang++ -std=c++11 t1.cpp t2.cpp -target i686-windows-gnu
C:\Dev\MSys2\tmp\test2-135e49.o:(.data+0x0): multiple definition of
`make_error_code()::C'
C:\Dev\MSys2\tmp\test-bf4e7c.o:(.data+0x0): first defined here
clang++.exe: error: linker command failed with exit code 1 (use -v to see
invocation)
I'm targeting Mingw here, but it doesn't work when targeting MSVC either.
Removing virtual from 'void fn()' makes clang work.</pre>
</div>
</p>
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