--- epic4-2.10.6/include/irc.h~	2016-01-30 17:32:30.000000000 +0100
+++ epic4-2.10.6/include/irc.h	2021-10-24 19:26:11.232881095 +0200
@@ -166,6 +166,6 @@
 	char *	current_package		(void);  /* XXX command.c */
 
 /* keep track of signals for scripted events */
-volatile int     signals_caught[NSIG];
+extern volatile int     signals_caught[NSIG];
 
 #endif /* __irc_h */