Kratos Windows compilation is done via Microsoft Visual C++ compiler. Therefore when developement is done in C++ level, if some one has declarations in header file and definitions in cpp files, then followings need to considered.

Classes

If a class is having seperated header (.h, .hpp) and source (.c, .cpp) files, add KRATOS_API(${APPLICATION_NAME}) before class name in the header file as explained in following code snippet.

class KRATOS_API(FLUID_DYNAMICS_APPLICATION) TestClass
{
    // Rest of the code is unchanged
};

Methods

If someone implemnets methods in a namespace and it has declaration in header and definition in cpp, then add KRATOS_API(${APPLICATION_NAME}) to the front of the method declaration in the header file as explained in following code snippet.

void KRATOS_API(FLUID_DYNAMICS_APPLICATION) TestMethod(int Value);

If the method is templated, and you have explicit template instantiations or definitions, then you need to again add KRATOS_API(${APPLICATION_NAME}) to all of the template instantiations as explained in following code snippets.

In the header file:

template<class T>
void KRATOS_API(FLUID_DYNAMICS_APPLICATION) TestTemplatedMethod(const T& Value);

In the cpp file:

// Template definition
template<class T>
void TestTemplatedMethod<T>(const T& value)
{
    // Function body unchanged
}

// Explicit template instantiation and definition
template<>
void KRATOS_API(FLUID_DYNAMICS_APPLICATION) TestTemplatedMethod<int>(const int& Value)
{
    // Function body unchanged
}

// Explicit template instantiation
template void KRATOS_API(FLUID_DYNAMICS_APPLICATION) TestTemplatedMethod<double>(const double&);