[PATCH] uboot-config: fix KCONFIG_CONFIG_ROOTDIR path

[Francesco Valla <francesco@valla.it>]

Commit 22e96b3 ("u-boot: Make sure the build dir is unique for each
UBOOT_CONFIG") changed the u-boot build directory name to include the
UBOOT_CONFIG value the build is performed for. Align to the new pattern
also the KCONFIG_CONFIG_ROOTDIR variable, which is used by devtool to
create a config baseline in case the menuconfig task is enabled.

This fixes the following error, which can be seen when building u-boot
under devtool and UBOOT_CONFIG contains a single configuration:

  cp: cannot stat '<u-boot-builddir>/<u-boot-defconfig>/.config': No such file or directory

Signed-off-by: Francesco Valla <francesco@valla.it>
---
 meta/classes-recipe/uboot-config.bbclass | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/classes-recipe/uboot-config.bbclass b/meta/classes-recipe/uboot-config.bbclass
index 112fea2de44cd716fbe65598b275410a4fb90056..f7848396c17fdf4835053b9f5a45480ef8ce9f1f 100644
--- a/meta/classes-recipe/uboot-config.bbclass
+++ b/meta/classes-recipe/uboot-config.bbclass
@@ -251,7 +251,8 @@ python () {
             # Ensure the uboot specific menuconfig settings do not leak into other recipes
             if 'u-boot' in recipename:
                 if len(ubootconfig) == 1:
-                    d.setVar('KCONFIG_CONFIG_ROOTDIR', os.path.join("${B}", d.getVar("UBOOT_MACHINE").strip()))
+                    builddir = "%s-%s" % (d.getVar("UBOOT_MACHINE").strip(), config)
+                    d.setVar('KCONFIG_CONFIG_ROOTDIR', os.path.join("${B}", builddir))
                 else:
                     # Disable menuconfig for multiple configs
                     d.setVar('KCONFIG_CONFIG_ENABLE_MENUCONFIG', "false")

---
base-commit: d3e757f21403554e7064c5fa2b353080d14d2ce7
change-id: 20260304-uboot_devtool_fix-170221fd17bc

Best regards,
-- 
Francesco Valla <francesco@valla.it>