--- CMakeLists.txt.orig	2012-07-31 02:36:19.000000000 +0900
+++ CMakeLists.txt	2012-10-14 20:16:06.000000000 +0900
@@ -17,5 +17,4 @@
 set(CURRENT_LANG ja)
 
 macro_optional_add_subdirectory( messages )
-macro_optional_add_subdirectory( docs )
 macro_optional_add_subdirectory( scripts )