Компиляция DLL из командной строки

#ifndef GEORGE_HPP_INCLUDED
#define GEORGE_HPP_INCLUDED
 
void george(); // Печатает "George, "
 
#endif //GEORGE_HPP_INCLUDED

#include <iostream>
#include "george.hpp"
 
void george() {
  std::cout << "George, ";
}

#ifndef RINGO_HPP_INCLUDED
#define RINGO_HPP_INCLUDED
 
void ringo(); // Печатает "and Ringo\n"
 
#endif //RINGO_HPP_INCLUDED

#include <iostream>
#include "ringo.hpp"
 
void ringo() {
  std::cout << "and Ringo" << std::endl;
}

#ifndef GEORGERINGO_HPP_INCLUDED
#define GEORGERINGO_HPP_INCLUDED
 
// определение GEORGERINGO_DLL при сборке libgeorgeringo.dll
#if defined(_WIN32) && !defined(__GNUC__)
#  ifdef GEORGERINGO_DLL
#    define GEORGERINGO_DECL __declspec(dllexport)
#  else
#    define GEORGERINGO_DECL __declspec(dllimport)
#  endif
#endif // WIN32
 
#ifndef GEORGERINGO_DECL
#  define GEORGERINGO_DECL
#endif
 
// Печатает "George, and Ringo\n"
GEORGERINGO_DECL void georgeringo();
 
#endif //GEORGERINGO_HPP_INCLUDED

#include <iostream>
#include "ringo.hpp"
 
void ringo() {
  std::cout << "and Ringo" << std::endl;
}

#ifndef GEORGERINGO_HPP_INCLUDED
#define GEORGERINGO_HPP_INCLUDED
 
// Печатает "George, and Ringo\n"
void __declspec(dllexport) georgeringo();
 
#endif //GEORGERINGO_HPP_INCLUDED

#include "george.hpp"
#include "ringo.hpp"
#include "georgeringo.hpp"
 
void __declspec(dllexport) georgeringo() {
  george();
  ringo();
}