#ifdef ARES_EADDRGETNETWORKPARAMS
REGISTER_LONG_CONSTANT("ARES_EADDRGETNETWORKPARAMS", ARES_EADDRGETNETWORKPARAMS, CONST_PERSISTENT|CONST_CS);
#endif
-
-/* More error codes */
-#define ARES_ECANCELLED 24 /* introduced in 1.7.0 */
+#ifdef ARES_ECANCELLED
+ REGISTER_LONG_CONSTANT("ARES_ECANCELLED", ARES_ECANCELLED, CONST_PERSISTENT|CONST_CS);
+#endif
REGISTER_LONG_CONSTANT("ARES_FLAG_USEVC", ARES_FLAG_USEVC, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ARES_FLAG_PRIMARY", ARES_FLAG_PRIMARY, CONST_PERSISTENT|CONST_CS);
#ifdef T_OPT
/* (41) EDNS0 option (meta-RR) */
REGISTER_LONG_CONSTANT("ARES_T_OPT", T_OPT, CONST_CS|CONST_PERSISTENT);
+#endif
#ifdef T_TSIG
/* (250) Transaction signature. */
REGISTER_LONG_CONSTANT("ARES_T_TSIG", T_TSIG, CONST_CS|CONST_PERSISTENT);
-#endif T_IXFR
+#endif
+#ifdef T_IXFR
/* (251) Incremental zone transfer. */
REGISTER_LONG_CONSTANT("ARES_T_IXFR", T_IXFR, CONST_CS|CONST_PERSISTENT);
#endif