+if(WIN32)
+ list(APPEND SOURCES ClipboardWindows.cxx)
+elseif(APPLE)
+ list(APPEND SOURCES ClipboardCocoa.mm)
+else()
+ find_package(X11)
+ if(X11_FOUND)
+ list(APPEND SOURCES ClipboardX11.cxx)
+ else()
+ list(APPEND SOURCES ClipboardFallback.cxx)
+ endif()
+endif()
+