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<base href="https://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 --- - GCC and Clang disagree on symbol mangling"
href="https://llvm.org/bugs/show_bug.cgi?id=24794">24794</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>GCC and Clang disagree on symbol mangling
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.6
</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>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>steven@uplinklabs.net
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=14871" name="attach_14871" title="test case">attachment 14871</a> <a href="attachment.cgi?id=14871&action=edit" title="test case">[details]</a></span>
test case
Running Clang 3.6.2.
I have some C++ code that fails to link because Clang and GCC are coming up
with different symbol mangling for some specific symbols in some of the
dependent libraries. I managed to come up with a small test case that
illustrates the issue (it's probably not fully reduced). I've attached it to
this bug report.
$ g++ -c test.cpp; nm -C test.o; nm test.o
+ g++ -c test.cpp
+ nm -C test.o
0000000000000000 T bar(foo::V&, int&, int*)
U baz::enable_if<!baz::is_enum<int>::value, void>::type
baz::Conv<int>(int&, int*)
U baz::enable_if<!baz::is_enum<foo::V>::value, void>::type
baz::Conv<foo::V>(foo::V&, int*)
+ nm test.o
0000000000000000 T _Z3barRN3foo1VERiPi
U
_ZN3baz4ConvIiEENS_9enable_ifIXntsrNS_7is_enumIT_EE5valueEvE4typeERS3_Pi
U
_ZN3baz4ConvIN3foo1VEEENS_9enable_ifIXntsrNS_7is_enumIT_EE5valueEvE4typeERS5_Pi
$ clang++ -c test.cpp; nm -C test.o; nm test.o
+ clang++ -c test.cpp
test.cpp:65:1: warning: control reaches end of non-void function
[-Wreturn-type]
}
^
1 warning generated.
+ nm -C test.o
0000000000000000 T bar(foo::V&, int&, int*)
U
_ZN3baz4ConvIiEENS_9enable_ifIXntsr7is_enumIT_EE5valueEvE4typeERS2_Pi
U
_ZN3baz4ConvIN3foo1VEEENS_9enable_ifIXntsr7is_enumIT_EE5valueEvE4typeERS4_Pi
+ nm test.o
0000000000000000 T _Z3barRN3foo1VERiPi
U
_ZN3baz4ConvIiEENS_9enable_ifIXntsr7is_enumIT_EE5valueEvE4typeERS2_Pi
U
_ZN3baz4ConvIN3foo1VEEENS_9enable_ifIXntsr7is_enumIT_EE5valueEvE4typeERS4_Pi
Note that the Clang-mangled symbol cannot be demangled by c++filt or nm.
Any ideas?</pre>
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