xcb-proto: use python3native to have reproducible pyc files

(From OE-Core rev: 7709b2551c07cfad591bb37817474fd106e7c2f1)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/xorg-proto/xcb-proto_1.13.bb

@@ -12,40 +12,18 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d763b081cb10c223435b01e00dc0aba7 \
                     file://src/dri2.xml;beginline=2;endline=28;md5=f8763b13ff432e8597e0d610cf598e65"
 
 SRC_URI = "http://xcb.freedesktop.org/dist/${BP}.tar.bz2"
-
 SRC_URI[md5sum] = "abe9aa4886138150bbc04ae4f29b90e3"
 SRC_URI[sha256sum] = "7b98721e669be80284e9bbfeab02d2d0d54cd11172b72271e47a2fe875e2bde1"
 
-inherit autotools pkgconfig
-
-# Force the use of Python 3 and a specific library path so we don't need to
-# depend on python3-native
-CACHED_CONFIGUREVARS += "PYTHON=python3 am_cv_python_pythondir=${libdir}/xcb-proto"
+inherit autotools pkgconfig python3native
 
 PACKAGES += "python-xcbgen"
 
 FILES_${PN} = ""
 FILES_${PN}-dev += "${datadir}/xcb/*.xml ${datadir}/xcb/*.xsd"
-FILES_python-xcbgen = "${libdir}/xcb-proto"
+FILES_python-xcbgen = "${PYTHON_SITEPACKAGES_DIR}"
 
 RDEPENDS_${PN}-dev = ""
 RRECOMMENDS_${PN}-dbg = "${PN}-dev (= ${EXTENDPKGV})"
 
 BBCLASSEXTEND = "native nativesdk"
-
-# Need to do this dance because we're forcing the use of host Python above and
-# if xcb-proto is built with Py3.5 and then re-used from sstate on a host with
-# Py3.6 the second build will write new cache files into the sysroot which won't
-# be listed in the manifest so won't be deleted, resulting in an error on
-# rebuilds.  Solve this by deleting the entire cache directory when this package
-# is removed from the sysroot.
-SSTATEPOSTINSTFUNCS += "xcb_sstate_postinst"
-xcb_sstate_postinst() {
-	if [ "${BB_CURRENTTASK}" = "populate_sysroot" -o "${BB_CURRENTTASK}" = "populate_sysroot_setscene" ]
-	then
-		cat <<EOF >${SSTATE_INST_POSTRM}
-#!/bin/sh
-rm -rf ${libdir}/xcb-proto/xcbgen/__pycache__
-EOF
-	fi
-}