[llvm-bugs] [Bug 26506] New: clang-cl -fmsc-version=1900 produces .obj files that don't link

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26506

            Bug ID: 26506
           Summary: clang-cl -fmsc-version=1900 produces .obj files that
                    don't link
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: nicolasweber at gmx.de
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

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.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20160206/a3c6497d/attachment.html>