[OE-core] [PATCH] qemu: Avoid potential build configuration contamination

[Richard Purdie]

Changing the gl options to qemu doesn't result in a correctly rebuilt
binary, the GL linkage can persist from a build where it was enabled
to one where it was not.

As well as clearly being incorrect and non-reproducible, this caused
some mystery failures on the autobuilder.

Cleaning ${B} at do_configure time avoids this. Most recipes
(e.g. autotools derived ones) already clean ${B} as appropriate and
avoid this issue.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/recipes-devtools/qemu/qemu.inc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index bb444b63d97..601fc2286b3 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -95,6 +95,7 @@ do_configure_prepend_class-native() {
 do_configure() {
     ${S}/configure ${EXTRA_OECONF}
 }
+do_configure[cleandirs] += "${B}"
 
 do_install () {
 	export STRIP=""
-- 
2.20.1