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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 --- - function template/generic lambda/local class/member function => undefined symbol"
href="https://llvm.org/bugs/show_bug.cgi?id=22989">22989</a>
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<tr>
<th>Summary</th>
<td>function template/generic lambda/local class/member function => undefined symbol
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</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++14
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>alex.cossette@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Attempts to call a member function in a local class nested in a generic lambda
nested in a function template results in an undefined symbol link error.
template <class>
void f() {
[](auto a) {
struct C {
static void g() {}
};
C::g();
}(0);
}
int main() {
f<void>();
}
$clang -std=c++14 link_error.cpp
warning: inline function 'f()::(anonymous class)::operator()(int)::C::g' is
not
defined [-Wundefined-inline]
static void g() {}
^
link_error.cpp:7:6: note: used here
C::g();
^
1 warning generated.
Undefined symbols for architecture x86_64:
"auto void f<void>()::'lambda'(void)::operator()<int>(void) const::C::g()",
referenced from:
auto void f<void>()::'lambda'(void)::operator()<int>(void) const in
link_error-b8a662.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see
invocation)
$clang --version
clang version 3.7.0 (<a href="http://llvm.org/git/llvm.git">http://llvm.org/git/llvm.git</a>
00edfaecf079bd80ed9d26f6e97fcdfc936c6937)
Target: x86_64-apple-darwin14.1.0
Thread model: posix
Also tested with 3.5 and 3.6 with same result.</pre>
</div>
</p>
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