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<base href="https://llvm.org/bugs/" />
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<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 -fmsc-version=1900 produces .obj files that don't link"
href="https://llvm.org/bugs/show_bug.cgi?id=26506">26506</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang-cl -fmsc-version=1900 produces .obj files that don't link
</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>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nicolasweber@gmx.de
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>C:\src\chrome\src>type dll.cc
struct A;
struct __declspec(dllexport) Base {
virtual ~Base() {}
virtual void operator()(const A&) const = 0;
};
struct __declspec(dllexport) Sub : public Base {
void operator()(const A&) const override {};
};
C:\src\chrome\src>"third_party\llvm-build\Release+Asserts\bin\clang-cl.exe" /c
client.cc -fmsc-version=1900
C:\src\chrome\src>link /dll dll.obj
Microsoft (R) Incremental Linker Version 14.00.23506.0
Copyright (C) Microsoft Corporation. All rights reserved.
Creating library dll.lib and object dll.exp
C:\src\chrome\src>type client.cc
struct A;
struct __declspec(dllimport) Base {
virtual ~Base() {}
virtual void operator()(const A&) const = 0;
};
struct __declspec(dllimport) Sub : public Base {
void operator()(const A&) const override {};
};
void f(Base* f) {
static Sub s;
}
int main() {
}
C:\src\chrome\src>"third_party\llvm-build\Release+Asserts\bin\clang-cl.exe" /c
client.cc -fmsc-version=1900
C:\src\chrome\src>link client.obj dll.lib
Microsoft (R) Incremental Linker Version 14.00.23506.0
Copyright (C) Microsoft Corporation. All rights reserved.
client.obj : error LNK2001: unresolved external symbol "const Sub::`vftable'"
(??_7Sub@@6B@)
client.exe : fatal error LNK1120: 1 unresolved externals
Works fine if I use -fmsc-version=1800 for the second compilation, or if I use
cl.exe.
If I use lld-link.exe for linking, it errors out with the same error.</pre>
</div>
</p>
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