1 files changed, 17 insertions, 0 deletions

diff --git a/meta/recipes-graphics/xorg-proto/xcb-proto_1.12.bb b/meta/recipes-graphics/xorg-proto/xcb-proto_1.12.bb
index 712ab6c59a..25a8373e0b 100644
--- a/meta/recipes-graphics/xorg-proto/xcb-proto_1.12.bb
+++ b/meta/recipes-graphics/xorg-proto/xcb-proto_1.12.bb
@@ -34,3 +34,20 @@ 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
+}