if x11_dep.found() # FIXME: originally if USE_X

  if gtk_x11_dep.found()

    executable('gtk-videooverlay', 'gtk-videooverlay.c',

      c_args : gst_plugins_base_args,

      include_directories: [configinc, libsinc],

      dependencies : [glib_deps, gst_dep, video_dep, libm, x11_dep, gtk_x11_dep],

      install: false)

  endif

  if have_cxx                                      # check for C++ support

    qt5_mod = import('qt5')

    qt5widgets_dep = dependency('qt5', modules : ['Gui', 'Widgets'], required: false)

    # FIXME Add a way to get that information out of the qt5 module

    moc = find_program('moc-qt5', required : false)

    if qt5widgets_dep.found() and moc.found()

      executable('qt-videooverlay', 'qt-videooverlay.cpp',

        cpp_args : gst_plugins_base_args,

        include_directories: [configinc, libsinc],

        dependencies : [glib_deps, gst_dep, video_dep, libm, x11_dep, qt5widgets_dep],

        install: false)

      # FIXME: this doesn't work properly yet, no moc_qtgv-videooverlay.cpp generated

      moc_files = qt5_mod.preprocess(moc_headers : 'qtgv-videooverlay.h')#moc_sources : 'qtgv-videooverlay.cpp')

      executable('qtgv-videooverlay', 'qtgv-videooverlay.cpp', moc_files,

        cpp_args : gst_plugins_base_args,

        include_directories: [configinc, libsinc],

        dependencies : [glib_deps, gst_dep, video_dep, libm, x11_dep, qt5widgets_dep],

        install: false)

    endif

  endif

endif