diff -Naur dctc-0.85.9-orig/configure.in dctc-0.85.9/configure.in
--- dctc-0.85.9-orig/configure.in	2006-03-18 14:46:18.000000000 -0600
+++ dctc-0.85.9/configure.in	2006-03-18 14:46:46.000000000 -0600
@@ -29,7 +29,7 @@
 			AC_MSG_RESULT($cc_version, bad)
 			bad_cc="yes"
 			;;
-		2.95.*|3.*)
+		2.95.*|3.*|4.*)
 			AC_MSG_RESULT($cc_version, ok)
 			bad_cc="no"
 			;;
diff -Naur dctc-0.85.9-orig/src/user_manage.h dctc-0.85.9/src/user_manage.h
--- dctc-0.85.9-orig/src/user_manage.h	2006-03-18 14:46:18.000000000 -0600
+++ dctc-0.85.9/src/user_manage.h	2006-03-18 14:48:09.000000000 -0600
@@ -27,11 +27,11 @@
 extern GPtrArray *hub_user_list;    /* list of all users connected to the hub */
 extern GPtrArray *hub_op_list;      /* list of all ops connected to the hub (ops are also in the user_list) */
 
-extern GPtrArray *hub_user_xtra_info;			/* array of extra data stored for each hub user */
+static GPtrArray *hub_user_xtra_info;			/* array of extra data stored for each hub user */
                                     /* the nth pointer of this array is for the nth user of the hub_user_list */
 												/* a user having no extra info has a null pointer as extra info */
 
-extern GPtrArray *hub_user_uinfo;     /* it is the result of /UINFO command for each user */
+static GPtrArray *hub_user_uinfo;     /* it is the result of /UINFO command for each user */
 
 typedef enum
 {