move mod_enum to use automake

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15812 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/udns/udns_resolver.c

@@ -45,6 +45,9 @@ int udns_inet_pton(int, const char *, void *);
 # undef HAVE_POLL
 #else
 #define udns_inet_pton inet_pton
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
 # include <sys/types.h>
 # include <sys/socket.h>
 # include <netinet/in.h>