care taken of the fact that AI_NUMERICSERV is not defined on OSX 10.5

src/ip.cpp

@@ -239,7 +239,11 @@ int zmq::resolve_ip_interface (sockaddr_storage* addr_, socklen_t *addr_len_,
 
     //  Restrict hostname/service to literals to avoid any DNS lookups or
     //  service-name irregularity due to indeterminate socktype.
-    req.ai_flags = AI_PASSIVE | AI_NUMERICHOST | AI_NUMERICSERV;
+#if defined ZMQ_HAVE_OSX
+   req.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
+#else
+   req.ai_flags = AI_PASSIVE | AI_NUMERICHOST | AI_NUMERICSERV;
+#endif 
 
     //  Resolve the literal address. Some of the error info is lost in case
     //  of error, however, there's no way to report EAI errors via errno.
@@ -289,6 +293,11 @@ int zmq::resolve_ip_hostname (sockaddr_storage *addr_, socklen_t *addr_len_,
     //  Avoid named services due to unclear socktype, and don't pick IPv6
     //  addresses if we don't have a local IPv6 address configured.
     req.ai_flags = AI_NUMERICSERV | AI_ADDRCONFIG;
+#if defined ZMQ_HAVE_OSX
+   req.ai_flags = AI_ADDRCONFIG;
+#else
+   req.ai_flags = AI_NUMERICSERV | AI_ADDRCONFIG;
+#endif 
 
     //  Resolve host name. Some of the error info is lost in case of error,
     //  however, there's no way to report EAI errors via errno.