How to disable the call to copy constructor?

[liangaibin]

I am trying to bind a class in a precompiled class library, which exports specific methods and properties function by function, as follows:

#if defined(__BUILD_LIBRARY__)
#define DLL_API __declspec(dllexport)
#else
#define DLL_API __declspec(dllimport)
#endif

// class definition
struct A
{
   A(const& A); //  <-- defined but not exported copy constructor!!
   DLL_API void Function1(); // normally exported function
   DLL_API void Function2(); // normally exported function
   ... ...
};

// binding code
py::class_<A>(m, "A")
    .def("Function1", &A::Function1)
    .def("Function2", &A::Function2);

When I compile the binding code into another library, it always failed with a link error: Unresolved external symbol 'A::A(const& A)', seems that I does not use that constructor in binding code directly.

Who can help me to solve the issue?