[LLVMbugs] [Bug 17664] New: clang fails with 'has internal linkage but is not defined'

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17664

            Bug ID: 17664
           Summary: clang fails with 'has internal linkage but is not
                    defined'
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: ppadevski at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Cannot compile the following code:

// Adaptee.h

class Adaptee { };

// Adapter.h

class Adapter {
   template<typename T>
   class Method {
      static void Get(const T *);
   }

   template<typename T>
   static void Adapt(const T *v) {
      Method<T>::Get(v);
   }
};

// Adaptee.cpp
#include <Adaptee.h>
#include <Adapter.h>

template<>
void Adapter::Method<Adaptee>::Get(const Adaptee *) { }

// main.cpp
#include <Adaptee.h>
#include <Adapter.h>

int
main()
{
   Adaptee a;
   Adapter::Adapt(&a);
}

The error occurs when compiling main.cpp:

'Adapter::Adapt<Adaptee>::Get' has internal linkage but is not defined
      [-Werror,-Wundefined-internal]
 static void Get(const T *nv);
                        ^
Adapter.h:10: note: used here
   Method<T>::Get(v);

This used to work on previous clang releases and on any gcc and vc. Is there a
known workaround?

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