[OE-core] [PATCH/RFC] xorg-lib: don't build libs unless requested by DISTRO_FEATURES

[Andreas Oberritter]

* If 'x11' is not set in DISTRO_FEATURES, then skip all
  recipes using xorg-lib-common.inc instead of only those
  using libx11.inc.

* One exception: pixman, which is not only used by xorg,
  but also by cairo.

Signed-off-by: Andreas Oberritter <obi at opendreambox.org>
---
 meta/recipes-graphics/xorg-lib/libx11.inc          |    5 -----
 meta/recipes-graphics/xorg-lib/xorg-lib-common.inc |    6 ++++++
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/meta/recipes-graphics/xorg-lib/libx11.inc b/meta/recipes-graphics/xorg-lib/libx11.inc
index 748a48c..9057edc 100644
--- a/meta/recipes-graphics/xorg-lib/libx11.inc
+++ b/meta/recipes-graphics/xorg-lib/libx11.inc
@@ -49,8 +49,3 @@ do_compile_prepend() {
 # Multiple libx11 derivatives from from this file and are selected by virtual/libx11
 # A world build should only build the correct version, not all of them.
 EXCLUDE_FROM_WORLD = "1"
-
-python () {
-       if not oe.utils.contains ('DISTRO_FEATURES', 'x11', True, False, d):
-       	  raise bb.parse.SkipPackage("X11 not enabled for this DISTRO")
-}
diff --git a/meta/recipes-graphics/xorg-lib/xorg-lib-common.inc b/meta/recipes-graphics/xorg-lib/xorg-lib-common.inc
index d106054..3d5d378 100644
--- a/meta/recipes-graphics/xorg-lib/xorg-lib-common.inc
+++ b/meta/recipes-graphics/xorg-lib/xorg-lib-common.inc
@@ -14,3 +14,9 @@ S = "${WORKDIR}/${XORG_PN}-${PV}"
 inherit autotools pkgconfig
 
 EXTRA_OECONF = "--enable-malloc0returnsnull --with-fop=no --without-xmlto"
+
+python () {
+        whitelist = [ "pixman" ]
+        if not d.getVar('BPN', True) in whitelist and not oe.utils.contains ('DISTRO_FEATURES', 'x11', True, False, d):
+                raise bb.parse.SkipPackage("X11 not enabled for this DISTRO")
+}
-- 
1.7.5.4