Robert P. Day removed 8 gazillion occurrences of "extern" on function
definitions.  (That should only be on prototypes.)
diff --git a/applets/applets.c b/applets/applets.c
index de1a871..bbe1203 100644
--- a/applets/applets.c
+++ b/applets/applets.c
@@ -405,7 +405,7 @@
 
 
 
-extern void bb_show_usage (void)
+void bb_show_usage (void)
 {
   const char *format_string;
   const char *usage_string = usage_messages;