text: #ifndef CONFIG_H
  #define CONFIG_H
  
  //#ifndef DBoW2_EXPORTS
  //	#define DBoW2_EXPORTS
  //#endif
  
  #ifdef WIN32
  #ifndef DBoW2_EXPORTS
  	#define DBoW2_EXPORTS
  #endif
  #ifdef DBoW2_EXPORTS
  #define EXPORT __declspec(dllexport)
  #else
  #define EXPORT __declspec(dllimport) 
  #endif
  #else
  #define EXPORT 
  //#define REGISTER_TYPE(name, classname) \
  //		extern "C" void EXPORT ##classname(void) {} 
  #endif
  
  
  //#ifdef DBoW2_EXPORTS
  //	#define EXPORT __declspec(dllexport)
  //#else
  //	#define EXPORT __declspec(dllimport) 
  //#endif
  //
  //#endif 
  
  #endif // CONFIG_H
  
  
  //#define REGISTER_TYPE(name, classname) \
  //		extern "C" void EXPORT ##classname(void) {} \