25 #ifndef SFML_SYSTEM_EXPORT_H    26 #define SFML_SYSTEM_EXPORT_H    31 #include <SFML/Config.h>    37 #if defined(CSFML_SYSTEM_EXPORTS)    39     #define CSFML_SYSTEM_API CSFML_API_EXPORT    43     #define CSFML_SYSTEM_API CSFML_API_IMPORT    48 #endif // SFML_SYSTEM_EXPORT_H