diff -x config.log -x config.status -ru tmp/gnugo-3.8/engine/liberty.h work/gnugo-3.8/engine/liberty.h
--- tmp/gnugo-3.8/engine/liberty.h	2009-02-17 13:41:31.000000000 -0800
+++ work/gnugo-3.8/engine/liberty.h	2021-04-18 17:16:43.172676763 -0700
@@ -857,8 +857,8 @@
 extern struct worm_data worm[BOARDMAX];
 
 /* Unconditionally meaningless moves. */
-int meaningless_black_moves[BOARDMAX];
-int meaningless_white_moves[BOARDMAX];
+extern int meaningless_black_moves[BOARDMAX];
+extern int meaningless_white_moves[BOARDMAX];
 
 /* Surround cache (see surround.c) */
 
diff -x config.log -x config.status -ru tmp/gnugo-3.8/interface/main.c work/gnugo-3.8/interface/main.c
--- tmp/gnugo-3.8/interface/main.c	2009-02-17 13:41:31.000000000 -0800
+++ work/gnugo-3.8/interface/main.c	2021-04-18 17:18:12.928045200 -0700
@@ -56,6 +56,13 @@
 #include "sgftree.h"
 #include "random.h"
 
+
+
+/* Unconditionally meaningless moves. */
+int meaningless_black_moves[BOARDMAX];
+int meaningless_white_moves[BOARDMAX];
+
+
 static void show_copyright(void);
 static void show_version(void);
 static void show_help(void);