Yet another bit of joy for mjn3

include/nl_types.h

@@ -30,6 +30,10 @@
 
 __BEGIN_DECLS
 
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning "mjn3 FIXME: None of these prototypes have implementations."
+#endif
+
 /* Message catalog descriptor type.  */
 typedef void *nl_catd;