Fixed: ROOT_DIR is the parent of CMAKE_SOURCE_DIR

--HG--
branch : develop

code/CMakeModules/GetRevision.cmake

@@ -20,7 +20,10 @@ IF(SOURCE_DIR)
   ENDIF()
 ELSE()
   SET(SOURCE_DIR ${CMAKE_SOURCE_DIR})
-  SET(ROOT_DIR ${CMAKE_SOURCE_DIR})
+  SET(ROOT_DIR ${CMAKE_SOURCE_DIR}/..)
+
+  # convert ROOT_DIR to absolute path
+  GET_FILENAME_COMPONENT(ROOT_DIR ${ROOT_DIR} ABSOLUTE)
 ENDIF()
 
 MACRO(NOW RESULT)