https://sourceforge.net/tracker/index.php?func=detail&aid=3392466&group_id=80013&atid=558446

--- CMakeLists.txt.orig	Thu Mar 17 01:21:07 2011
+++ CMakeLists.txt	Mon Aug  6 15:37:47 2012
@@ -163,7 +163,7 @@ IF ( BUILD_CONTRIBS )
   SET(BUILD_CONTRIBS_LIB 1)
 ENDIF ( BUILD_CONTRIBS )
 IF ( BUILD_CONTRIBS_LIB )
-  ADD_SUBDIRECTORY (src/contribs-lib EXCLUDE_FROM_ALL)
+  ADD_SUBDIRECTORY (src/contribs-lib)
 ENDIF ( BUILD_CONTRIBS_LIB )