extern am_feature_t *am_init_feature_set(void);
extern am_feature_t *am_set_default_feature_set(void);
extern am_feature_t *am_allocate_feature_set(void);
extern am_feature_t *am_init_feature_set(void);
extern am_feature_t *am_set_default_feature_set(void);
extern am_feature_t *am_allocate_feature_set(void);