+/*
+ * When compiled for use with libsysio, this allows one to move all the
+ * externals to a distinct namespace. When not, we want it to do nothing.
+ *
+ * NB: The choice of macro name here is dangerous. It's in the global
+ * namespace! We should fix that one of these days.
+ */
+#if !defined(SYSIO_INTERFACE_NAME)
+#define SYSIO_INTERFACE_NAME(_n) _n
+#endif
+