anchor.diff:  
   PACKAGECONFIG_GL ?= "${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'gl', '', d)}"
   PACKAGECONFIG_FB ?= "${@bb.utils.contains('DISTRO_FEATURES', 'directfb', 'directfb', '', d)}"
  -PACKAGECONFIG_X11 ?= "${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'xcb xvideo xsync xshape xrender xrandr xfixes xinput2 xinput xinerama xcursor glib gtkstyle xkb', '', d)}"
  +PACKAGECONFIG_X11 ?= "${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'xcb xsync xshape xrender xrandr xfixes xinput2 xcursor glib xkb', '', d)}"
   PACKAGECONFIG_FONTS ?= ""
   PACKAGECONFIG_SYSTEM ?= "jpeg libpng zlib"
   PACKAGECONFIG_MULTIMEDIA ?= "${@bb.utils.contains('DISTRO_FEATURES', 'pulseaudio', 'pulseaudio', '', d)}"
  
positive.code: PACKAGECONFIG[mtdev] = "-mtdev,-no-mtdev,mtdev"
  # depends on glib
  PACKAGECONFIG[fontconfig] = "-fontconfig,-no-fontconfig,fontconfig"
  PACKAGECONFIG[gtkstyle] = "-gtkstyle,-no-gtkstyle,gtk+"
  PACKAGECONFIG[directfb] = "-directfb,-no-directfb,directfb"
  PACKAGECONFIG[linuxfb] = "-linuxfb,-no-linuxfb"
  PACKAGECONFIG[mitshm] = "-mitshm,-no-mitshm,mitshm"
  
negative.code: PACKAGECONFIG[sql-sqlite2] = "-sql-sqlite2,-no-sql-sqlite2,sqlite"
  PACKAGECONFIG[sql-sqlite] = "-sql-sqlite -system-sqlite,-no-sql-sqlite,sqlite3"
  PACKAGECONFIG[xcursor] = "-xcursor,-no-xcursor,libxcursor"
  PACKAGECONFIG[xinput2] = "-xinput2,-no-xinput2,libxi"
  PACKAGECONFIG[xfixes] = "-xfixes,-no-xfixes,libxfixes"
  PACKAGECONFIG[xrandr] = "-xrandr,-no-xrandr,libxrandr"
  PACKAGECONFIG[xrender] = "-xrender,-no-xrender,libxrender"
  PACKAGECONFIG[xshape] = "-xshape,-no-xshape"
  PACKAGECONFIG[xsync] = "-xsync,-no-xsync"
  PACKAGECONFIG[openvg] = "-openvg,-no-openvg"
  PACKAGECONFIG[iconv] = "-iconv,-no-iconv,virtual/libiconv"
  PACKAGECONFIG[xkb] = "-xkb,-no-xkb -no-xkbcommon,libxkbcommon"
  