Средства и методы разработки

А это что? https://github.com/mongodb/mongo-c-driver/blob/master/src/mongo.h
/** * Remove a document from a MongoDB server. * * The default write concern set on the conn object will be used. * * @param conn a mongo object. * @param ns the namespace. * @param cond the bson query. * @param custom_write_concern a write concern object that will * override any write concern set on the conn object. * * @return MONGO_OK or MONGO_ERROR with error stored in conn object. */ MONGO_EXPORT int mongo_remove( mongo *conn, const char *ns, const bson *cond, mongo_write_concern *custom_write_concern );