+AC_MSG_CHECKING(struct sockaddr_storage)
+AC_TRY_COMPILE([#include <sys/types.h>
+#include <sys/socket.h>],
+[struct sockaddr_storage x;],
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_SOCKADDR_STORAGE, 1,
+ [Define if you have strct sockaddr_storage.] ),
+ AC_MSG_RESULT(no))
+