+/* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
+
+#else
+ WARNING ("network plugin: Cannot set the interface on a unicast "
+ "socket because "
+# if !defined(SO_BINDTODEVICE)
+ "the the \"SO_BINDTODEVICE\" socket option "
+# else
+ "the \"if_indextoname\" function "
+# endif
+ "is not available on your system.");