--- ray/src/CMakeLists.txt	2011/10/28 20:46:47	1.2
+++ ray/src/CMakeLists.txt	2015/05/08 18:07:38	1.4
@@ -7,9 +7,6 @@ else()
   set(LIB_M )
 endif()
 
-find_package(OpenGL)
-find_package(X11)
-
 include_directories(common)
 # create a macro to generate
 macro(create_version_file version_file)
@@ -32,8 +29,8 @@ add_subdirectory(ot)
 add_subdirectory(px)
 add_subdirectory(rt)
 add_subdirectory(util)
-# only use rvu if qt4 is found
-if(QT4_FOUND)
+# only use rvu if qt5 is found
+if(Qt5Widgets_DIR)
   add_subdirectory(qtrvu)
 endif()