anchor.diff:  PACKAGECONFIG[tslib] = "-tslib,-no-tslib,tslib"
   PACKAGECONFIG[cups] = "-cups,-no-cups,cups"
   PACKAGECONFIG[dbus] = "-dbus,-no-dbus,dbus"
  -PACKAGECONFIG[xcb] = "-xcb -xcb-xlib -system-xcb,-no-xcb,libxcb xcb-util-wm xcb-util-image xcb-util-keysyms xcb-util-renderutil libxext"
  +PACKAGECONFIG[xcb] = "-xcb -xcb-xlib -no-bundled-xcb-xinput,-no-xcb,libxcb xcb-util-wm xcb-util-image xcb-util-keysyms xcb-util-renderutil libxext"
   PACKAGECONFIG[sql-ibase] = "-sql-ibase,-no-sql-ibase"
   PACKAGECONFIG[sql-mysql] = "-sql-mysql -mysql_config ${STAGING_BINDIR_CROSS}/mysql_config,-no-sql-mysql,mysql5"
   PACKAGECONFIG[sql-psql] = "-sql-psql,-no-sql-psql,postgresql"
  
positive.code: # separate some parts of PACKAGECONFIG which are often changed
  PACKAGECONFIG_GL ?= "${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'gl', 'no-opengl', d)}"
  PACKAGECONFIG_FB ?= "${@bb.utils.contains('DISTRO_FEATURES', 'directfb', 'directfb', '', d)}"
  PACKAGECONFIG_X11 ?= "${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'xcb xcb-xinput glib xkb xkbcommon', '', d)}"
  PACKAGECONFIG_KDE ?= "${@bb.utils.contains('DISTRO_FEATURES', 'kde', 'sm cups fontconfig kms gbm libinput sql-sqlite openssl', '', d)}"
  PACKAGECONFIG_FONTS ?= ""
  PACKAGECONFIG_SYSTEM ?= "jpeg libpng zlib"
  
negative.code: PACKAGECONFIG[sql-db2] = "-sql-db2,-no-sql-db2"
  PACKAGECONFIG[sql-sqlite2] = "-sql-sqlite2,-no-sql-sqlite2,sqlite"
  PACKAGECONFIG[sql-sqlite] = "-sql-sqlite -system-sqlite,-no-sql-sqlite,sqlite3"
  PACKAGECONFIG[iconv] = "-iconv,-no-iconv,virtual/libiconv"
  PACKAGECONFIG[xkbcommon] = "-xkbcommon,-no-xkbcommon,libxkbcommon,xkeyboard-config"
  PACKAGECONFIG[evdev] = "-evdev,-no-evdev"
  PACKAGECONFIG[mtdev] = "-mtdev,-no-mtdev,mtdev"
  