<html>
<head>
<base href="http://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang-cl tries to instantiate all of the methods on template dllexport classes"
href="http://llvm.org/bugs/show_bug.cgi?id=20163">20163</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang-cl tries to instantiate all of the methods on template dllexport classes
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ehsan@mozilla.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>We hit this when building Skia as a DLL with clang-cl. FWIW I think the
semantics implemented by clang-cl is much saner, but I guess MSVC only exports
the symbols that are used in the translation unit and doesn't try to
instantiate all of the other members.
$ cat test.cpp
template <class T> struct __declspec(dllexport) Foo {
void f() { T::bar(); }
};
void x() {
Foo<int> a;
}
$ cl -c test.cpp
$ clang-cl -c test.cpp
test.cpp(2,14) : error: type 'int' cannot be used prior to '::' because it has
no members
void f() { T::bar(); }
^
test.cpp(1,49) : note: in instantiation of member function 'Foo<int>::f'
requested here
template <class T> struct __declspec(dllexport) Foo {
^
1 error generated.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>