#ifndef DLL_PUBLIC

#if defined _WIN32
  #ifdef __GNUC__
    #define DLL_PUBLIC __attribute__ ((dllexport))
  #else
    #define DLL_PUBLIC __declspec(dllexport)
  #endif
  #define DLL_LOCAL
#else
  #if __GNUC__ >= 4
    #define DLL_PUBLIC __attribute__ ((visibility ("default")))
    #define DLL_LOCAL  __attribute__ ((visibility ("hidden")))
  #else
    #define DLL_PUBLIC
    #define DLL_LOCAL
  #endif
#endif

#endif