-int gras_procdata_add(const char *name, pvoid_f_void_t creator,void_f_pvoid_t destructor);
-void *gras_libdata_by_name(const char *name);
-void *gras_libdata_by_id(int id);
+XBT_PUBLIC int gras_procdata_add(const char *name, pvoid_f_void_t creator,void_f_pvoid_t destructor);
+XBT_PUBLIC void *gras_libdata_by_name(const char *name);
+XBT_PUBLIC void *gras_libdata_by_id(int id);