anchor.diff:      "--without-sdl"
       "--${boolWt (libraw != null)}-libraw"
       "--${boolWt (jasper != null)}-jasper"
  -    "--without-graphviz"
  +    "--${boolWt (graphviz != null)}-graphviz"
       "--without-lua"
       "--${boolWt (ffmpeg != null)}-libavformat"
       "--${boolWt (v4l_lib != null)}-libv4l"
  
positive.code:     libspiro
      libtiff
      libwebp
      openexr
      pango
      v4l_lib
    ];
  
negative.code:     cairo
      exiv2
      ffmpeg
      graphviz
      gdk-pixbuf
      gexiv2
      glib
  