u-boot: fix externalsrc not triggering do_configure on defconfig changes

externalsrc only monitors files listed in CONFIGURE_FILES environment
variable to know if it should trigger a rebuild of do_configure. By
default it is unset, but the defconfig from U-Boot should be listed
otherwise an old defconfig may be used even though the change is
technically detected by the do_compile logic later in the process.

Because U-Boot recipe uses `make oldconfig` when no defconfig is passed,
monitor .config for that special case.

This fixes U-Boot recipes not detecting defconfig changes when
devtool'ed.

Reported-by: Iskander Amara <iskander.amara@theobroma-systems.com>
Cc: Quentin Schulz <foss+yocto@0leil.net>
(From OE-Core rev: fef517b5f978cf848b9cc40e8ce6bb2762681182)

Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/meta/recipes-bsp/u-boot/u-boot-configure.inc b/meta/recipes-bsp/u-boot/u-boot-configure.inc
index 235623d25a..378d675364 100644
--- a/meta/recipes-bsp/u-boot/u-boot-configure.inc
+++ b/meta/recipes-bsp/u-boot/u-boot-configure.inc
@@ -8,6 +8,8 @@ inherit uboot-config cml1
 
 DEPENDS += "kern-tools-native"
 
+CONFIGURE_FILES = "${@d.getVar('UBOOT_MACHINE') or '.config'}"
+
 do_configure () {
     if [ -n "${UBOOT_CONFIG}" ]; then
         unset i j