[LLVMbugs] [Bug 18675] New: [MS ABI] Function template specializations get the wrong linkage?

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18675

            Bug ID: 18675
           Summary: [MS ABI] Function template specializations get the
                    wrong linkage?
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: hans at chromium.org
                CC: llvmbugs at cs.uiuc.edu
            Blocks: 12477
    Classification: Unclassified

Compiling and linking the following two files with clang-cl fails:

a.cc:

  template<typename T> struct S {
    void f() { }
  };
  template<> void S<int>::f() {
    // Specialization.
  }

  void g();
  int main() {
    S<int> s;
    s.f();
    g();
  }

b.cc:

  template<typename T> struct S {
    void f() { }
  };
  template<> void S<int>::f() {
    // Specialization.
  }

  void g() {
    S<int> s;
    s.f();
  }

The linker complains that "public: void __thiscall S<int>::f(void)"
(?f@?$S at H@@QAEXXZ) is already defined.

It links fine if compiled with cl.exe.

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