fixed older CMake versions using PATH instead of DIRECTORY in get_filename_component()

macros.cmake

@@ -212,9 +212,14 @@ endmacro()
 
 function(subdirs VAR DIRPATH)
 
+if(${CMAKE_VERSION} VERSION_LESS 2.12 )
+set(COMP_VAR PATH)
+else()
+set(COMP_VAR DIRECTORY)
+endif()
   file(GLOB_RECURSE SDIR ${DIRPATH}/*)
   foreach(LOOP ${SDIR})
-	get_filename_component(LOOP ${LOOP} DIRECTORY)
+	get_filename_component(LOOP ${LOOP} ${COMP_VAR})
 	list(APPEND ALLDIRS ${LOOP})
   endforeach()
   list(REMOVE_DUPLICATES ALLDIRS)