extern splay_tree_t subnet_tree;
extern int subnet_compare(const struct subnet_t *a, const struct subnet_t *b);
-extern subnet_t *new_subnet(void) __attribute__((__malloc__));
+extern subnet_t *new_subnet(void) ATTR_MALLOC;
extern void free_subnet(subnet_t *subnet);
extern void init_subnets(void);
extern void exit_subnets(void);