Index: engine/CannaRk.c
--- engine/CannaRk.c.orig
+++ engine/CannaRk.c
@@ -20,11 +20,12 @@ History:
 	931127	added RKTAB searching in RKPATH
 	931214	deleted exceptional NN handling
 ///////////////////////////////////////////////////////////////////////*/
-int RomkanExists;
-int ONEW_kanamode;
+extern int RomkanExists;
+extern int ONEW_kanamode;
 
 #include <ctype.h>
 #include <stdio.h>
+#include <string.h>
 
 #include <canna/RK.h>
 #include <canna/jrkanji.h>
