+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)
+ find_package(Qt5Svg REQUIRED)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS}")
+ set(QT_INCLUDE_DIRS ${Qt5Gui_INCLUDE_DIRS} ${Qt5Widgets_INCLUDE_DIRS})
+ set(QT_LIBRARIES Qt5::Gui Qt5::Widgets Qt5::Svg)
+ add_definitions(${Qt5Gui_DEFINITIONS} ${Qt5Widgets_DEFINITIONS})
+else()
+ find_program(QT_QMAKE_EXECUTABLE NAMES qmake4 qmake-qt4 qmake-mac)
+ find_package(Qt4 REQUIRED QtCore QtGui QtSvg)
+endif()
+
+if(WIN32)
+ # On Windows/MinGW we need to use 'thread_win32' instead of 'thread'.
+ # The library is named libboost_thread_win32* (not libboost_thread*).
+ find_package(Boost 1.42 COMPONENTS filesystem system thread_win32 REQUIRED)
+else()
+ find_package(Boost 1.42 COMPONENTS filesystem system thread REQUIRED)
+endif()