+if(FORCE_QT4)
+ set(Qt5Core_FOUND FALSE)
+else()
+ find_package(Qt5Core QUIET)
+endif()
+
+if(Qt5Core_FOUND)
+ message("-- Using Qt5")
+ find_package(Qt5Widgets REQUIRED)
+ find_package(Qt5Gui REQUIRED)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS}")
+ set(QT_INCLUDE_DIRS ${Qt5Gui_INCLUDE_DIRS} ${Qt5Widgets_INCLUDE_DIRS})
+ set(QT_LIBRARIES Qt5::Gui Qt5::Widgets)
+ add_definitions(${Qt5Gui_DEFINITIONS} ${Qt5Widgets_DEFINITIONS})
+else()
+ find_program(QT_QMAKE_EXECUTABLE NAMES qmake4 qmake-qt4 qmake-mac)
+ find_package(Qt4 REQUIRED)
+endif()