gentoo-overlay/games-board/gnuchess/files/gnuchess-6.2.2-addbook.patch

--- trunk/src/main.cc	2015/10/17 13:52:22	127
+++ trunk/src/main.cc	2015/10/18 17:28:56	128
@@ -412,6 +412,7 @@
     char data[9+MAXSTR+1+4]="";
     sprintf( data, "book add %s\nquit", opt_addbook );
     SendToEngine( data );
+    SET (flags, QUIT);
   }
 
   if ( opt_easy == 0 )