[Buildroot] [git commit branch/2026.05.x] package/uboot-tools: fix host build without FIT support

commit: https://gitlab.com/buildroot.org/buildroot/-/commit/bee32c9979320ae33c0882880bdfcd1290daff04
branch: https://gitlab.com/buildroot.org/buildroot/-/tree/2026.05.x

Commit [1] "package/uboot-tools: fix host FIT signature support"
slightly changed the logic in which the file
$(@D)/include/generated/autoconf.h is created.

When there is no Kconfig sub-option selected, the file is no longer
created and the build fails with error:

    include/linux/kconfig.h:4:10: fatal error: generated/autoconf.h: No such file or directory

The issue can be reproduced with the with the simple commands:

    cat >.config <<EOF
    BR2_aarch64=y
    BR2_TOOLCHAIN_EXTERNAL=y
    BR2_PACKAGE_HOST_UBOOT_TOOLS=y
    EOF
    make olddefconfig
    make host-uboot-tools

This commit fixes the issue by simply adding a touch of the file
at the beginning to make sure it will always exist.

[1] https://gitlab.com/buildroot.org/buildroot/-/commit/928cc5dc5cb82e6f2cb43f853488309eb806ef89

Cc: James Hilliard <[email protected]>
Reported-by: Robert P. J. Day <[email protected]>
Tested-by: Robert P. J. Day <[email protected]>
Signed-off-by: Julien Olivain <[email protected]>
(cherry picked from commit 9f17ac02b8561ca7adeb7911e4939b2ac9ad6320)
Signed-off-by: Titouan Christophe <[email protected]>
---
 package/uboot-tools/uboot-tools.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/uboot-tools/uboot-tools.mk b/package/uboot-tools/uboot-tools.mk
index ef8bcabbd9..8a2877333c 100644
--- a/package/uboot-tools/uboot-tools.mk
+++ b/package/uboot-tools/uboot-tools.mk
@@ -124,6 +124,7 @@ define HOST_UBOOT_TOOLS_CONFIGURE_CMDS
 	echo "#include <linux/kconfig.h>" > $(@D)/include/config.h
 	touch $(@D)/include/config/auto.conf
 	mkdir -p $(@D)/include/generated
+	touch $(@D)/include/generated/autoconf.h
 	$(if $(BR2_PACKAGE_HOST_UBOOT_TOOLS_FIT_SUPPORT),$(UBOOT_TOOLS_ENABLE_HASH_ALGOS))
 	$(if $(BR2_PACKAGE_HOST_UBOOT_TOOLS_FIT_SUPPORT),echo '#define CONFIG_TOOLS_FIT_PRINT 1' >> $(@D)/include/generated/autoconf.h)
 	$(if $(BR2_PACKAGE_HOST_UBOOT_TOOLS_FIT_SIGNATURE_SUPPORT),echo '#define CONFIG_TOOLS_IMAGE_PRE_LOAD 1' >> $(@D)/include/generated/autoconf.h)
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