--- a/allow.c
+++ b/allow.c
@@ -34,6 +34,8 @@
 MOVE	     current_move[4] = {{0, 0}, {0, 0},
 			        {0, 0}, {0, 0}}; /* global only for un_do() */
 
+MOVE possible_moves[8000], *list;
+
 int  test_move             (void);
 int  create_possible_moves (int dice_to_set, int *w, int actual_pin);
 int  move_is_allowed       (int from_pin, int to_pin);
--- a/gammon.h
+++ b/gammon.h
@@ -117,12 +117,14 @@
 	MoveFunc MoveFunction;
 	BOARD board;
 	X11SET X11Set;
-} Player[2];
+};
+extern struct _Player Player[2];
 
 struct  _PinTable {
         int count;
         int color;
-} Pin[29], rollout_position[29];	/* 0, 25 = bar, 1 - 24 = board and 26, 27 finished[color] */
+};
+extern struct _PinTable Pin[29], rollout_position[29];	/* 0, 25 = bar, 1 - 24 = board and 26, 27 finished[color] */
 
 
 /* if you have the dice values 1 and 1 and all stones are on different
@@ -137,7 +139,7 @@
         int to;
 } MOVE;
 
-MOVE possible_moves[8000], *list;
+extern MOVE possible_moves[8000], *list;
 
 struct _move_hist {
 	int	    from [4];
@@ -151,16 +153,17 @@
 struct _Tournament {
 	unsigned int   game_number;
 	unsigned int   winning_point;
-} tournament;
+};
+extern struct _Tournament tournament;
 
 struct _RolloutSave {
 	int turn;
 	int doubler_value;
 	int doubler_owner;
 	int roll[2];
-} rollout_save;
+};
 
-FILE *endgame_database;
+extern FILE *endgame_database;
 
 extern void switch_turn();
 
--- a/rollout.c
+++ b/rollout.c
@@ -48,6 +48,9 @@
 void   rollout_roll_dice  ();
 void   exec_rollout       ();
 
+struct _PinTable Pin[29], rollout_position[29];
+struct _RolloutSave rollout_save;
+
 void RollOut (void)
 {
 	Widget toplevel = Player[0].X11Set.toplevel;
--- a/xgammon.c
+++ b/xgammon.c
@@ -178,6 +178,10 @@
 MOVE		*compi_choice;
 
 FILE*		protokol_file = NULL;
+FILE*       endgame_database;
+struct _gammon_resource gammon_resource;
+struct _Tournament tournament;
+struct _Player Player[2];
 
 char * greetings = "Wellcome to xgammon  version 0.98\n   (C) 1994   Lambert Klasen   Detlef Steuer\n    We hope you enjoy it\n\n";
 
--- a/xgammon.h
+++ b/xgammon.h
@@ -70,7 +70,8 @@
 	char	*server;
 	int     port;
 	int     button_move;
-} gammon_resource;
+};
+extern struct _gammon_resource gammon_resource;
 
 /* diawin.c */
 extern void AppendDialogText ();