Index: src/options.c
--- src/options.c.orig
+++ src/options.c
@@ -27,7 +27,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Bos
 #include <string.h>
 
 /* preprocess.c */
-int ignore_stroke_dir, ignore_stroke_num;
+extern int ignore_stroke_dir, ignore_stroke_num;
 
 /* cellwidget.c */
 extern int cell_width, cell_height, cell_cols_pref, cell_rows_pref,