diff -u ./source3/libads/dns.c.orig ./source3/libads/dns.c
--- ./source3/libads/dns.c.orig	2010-05-17 06:51:23.000000000 -0500
+++ ./source3/libads/dns.c	2010-05-30 13:07:12.000000000 -0500
@@ -87,7 +87,11 @@
 
 	/* See RFC 1035 for details. If this fails, then return. */
 
+#ifdef HAVE_DN_EXPAND
 	namelen = dn_expand( start, end, p, hostname, sizeof(hostname) );
+#else
+	namelen = -1; /* TODO!!! */
+#endif
 	if ( namelen < 0 ) {
 		return False;
 	}
@@ -124,7 +128,11 @@
 	ZERO_STRUCTP( rr );
 	/* pull the name from the answer */
 
+#ifdef HAVE_DN_EXPAND
 	namelen = dn_expand( start, end, p, hostname, sizeof(hostname) );
+#else
+	namelen = -1; /* TODO!!! */
+#endif
 	if ( namelen < 0 ) {
 		return -1;
 	}
@@ -198,7 +206,11 @@
 
 	p += 6;
 
+#ifdef HAVE_DN_EXPAND
 	namelen = dn_expand( start, end, p, dcname, sizeof(dcname) );
+#else
+	namelen = -1; /* TODO!!! */
+#endif
 	if ( namelen < 0 ) {
 		DEBUG(1,("ads_dns_parse_rr_srv: Failed to uncompress name!\n"));
 		return False;
@@ -247,7 +259,11 @@
 
 	/* ame server hostname */
 
+#ifdef HAVE_DN_EXPAND
 	namelen = dn_expand( start, end, p, nsname, sizeof(nsname) );
+#else
+	namelen = -1; /* TODO!!! */
+#endif
 	if ( namelen < 0 ) {
 		DEBUG(1,("ads_dns_parse_rr_ns: Failed to uncompress name!\n"));
 		return False;
@@ -336,6 +352,7 @@
 			}
 		}
 
+#ifdef HAVE_RES_QUERY /* or #ifdef HAVE_DN_EXPANS? */
 		if ((resp_len = res_query(name, C_IN, q_type, buffer, buf_len))
 				< 0 ) {
 			DEBUG(3,("ads_dns_lookup_srv: "
@@ -353,6 +370,15 @@
 			last_dns_check = time(NULL);
 			return last_dns_status;
 		}
+#else /* TODO!!! */
+		DEBUG(3,("ads_dns_lookup_srv: "
+			"Failed to resolve %s (%s)\n",
+			name, strerror(ENOTSUP)));
+		TALLOC_FREE( buffer );
+		last_dns_status = NT_STATUS_UNSUCCESSFUL;
+		last_dns_check = time(NULL);
+		return last_dns_status;
+#endif
 
 		/* On AIX, Solaris, and possibly some older glibc systems (e.g. SLES8)
 		   truncated replies never give back a resp_len > buflen