--- CMakeLists.txt.orig	2013-03-07 17:01:14.000000000 +0900
+++ CMakeLists.txt	2013-03-07 17:05:06.000000000 +0900
@@ -11,7 +11,7 @@
 
 # subdirectories to build
 add_subdirectory(data)
-add_subdirectory(doc)
+#add_subdirectory(doc)
 add_subdirectory(src)
 # add_subdirectory(sounds) # excluded because of the lack of sound support
 add_subdirectory(images)