linux/Config.in - buildroot - Git at Google


            
            menu "Kernel"


            config BR2_LINUX_KERNEL

            
            	bool "Linux Kernel"

            
            	select BR2_PACKAGE_HOST_KMOD # Unconditional, even if modules not enabled

            
            	select BR2_PACKAGE_HOST_IMAGEMAGICK if BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH != ""

            
            	# mips always generates an ITB image

            
            	select BR2_PACKAGE_HOST_UBOOT_TOOLS if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el

            
            	select BR2_PACKAGE_HOST_UBOOT_TOOLS_FIT_SUPPORT if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el

            
            	help

            
            	  Enable this option if you want to build a Linux kernel for

            
            	  your embedded device


            	  https://www.kernel.org/


            if BR2_LINUX_KERNEL


            # Packages that need to have a kernel with support for loadable modules,

            
            # but do not use the kernel-modules infrastructure, should select that

            
            # option.

            
            config BR2_LINUX_NEEDS_MODULES

            
            	bool


            config BR2_LINUX_KERNEL_LATEST_SERIES

            
            	# Helper symbol to indicate if one of the "latest" kernel

            
            	# (either the very latest one or from a longterm supported series)

            
            	# has been selected

            
            	bool


            #

            
            # Version selection. We provide the choice between:

            
            #

            
            #  1. A single fairly recent stable kernel version

            
            #  2. A custom stable version

            
            #  3. A custom tarball

            
            #  4. A set of custom repository locations

            
            #

            
            choice

            
            	prompt "Kernel version"


            config BR2_LINUX_KERNEL_LATEST_VERSION

            
            	bool "Latest version (7.2)"

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_7_2 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES


            config BR2_LINUX_KERNEL_LATEST_6_18

            
            	bool "Long term 6.18"

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_18 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES


            config BR2_LINUX_KERNEL_LATEST_6_12

            
            	bool "Long term 6.12"

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_12 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES


            config BR2_LINUX_KERNEL_LATEST_6_6

            
            	bool "Long term 6.6"

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_12 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES


            config BR2_LINUX_KERNEL_LATEST_6_1

            
            	bool "Long term 6.1"

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_1 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES


            config BR2_LINUX_KERNEL_LATEST_5_15

            
            	bool "Long term 5.15"

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_15 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES


            config BR2_LINUX_KERNEL_LATEST_5_10

            
            	bool "Long term 5.10"

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES


            config BR2_LINUX_KERNEL_LATEST_CIP_VERSION

            
            	bool "Latest CIP SLTS version (5.10.254-cip72)"

            
            	# Support was introduced in Linux 5.19

            
            	depends on !BR2_loongarch64

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES

            
            	help

            
            	  CIP launched in the spring of 2016 to address the needs of

            
            	  organizations in industries such as power generation and

            
            	  distribution, water, oil and gas, transportation, building

            
            	  automation and more for reliable and secure Linux-based

            
            	  embedded systems that can be sustained over a period of

            
            	  10 to as many as 60 years.

            
            	  The project's goal is to provide an open source base layer

            
            	  of industrial-grade software that permits the use and

            
            	  implementation of software building blocks that meet

            
            	  these requirements.


            	  The CIP community plans to maintain 5.10 for security and

            
            	  bug fixes for more than 10 years.


            	  https://www.cip-project.org


            config BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION

            
            	bool "Latest CIP RT SLTS version (5.10.254-cip72-rt32)"

            
            	# Support was introduced in Linux 5.19

            
            	depends on !BR2_loongarch64

            
            	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10 if BR2_KERNEL_HEADERS_AS_KERNEL

            
            	select BR2_LINUX_KERNEL_LATEST_SERIES

            
            	help

            
            	  Same as the CIP version, but this is the PREEMPT_RT realtime

            
            	  variant.


            	  The CIP community plans to maintain 5.10 for security and

            
            	  bug fixes for more than 10 years.


            	  https://www.cip-project.org


            config BR2_LINUX_KERNEL_CUSTOM_VERSION

            
            	bool "Custom version"

            
            	help

            
            	  This option allows to use a specific official version from

            
            	  kernel.org, like 2.6.x, 2.6.x.y, 3.x.y, ...


            	  Note: you cannot use this option to select a _longterm_ 2.6

            
            	  kernel, because these kernels are not located at the standard

            
            	  URL at kernel.org. Instead, select "Custom tarball" and

            
            	  specify the right URL directly.


            config BR2_LINUX_KERNEL_CUSTOM_TARBALL

            
            	bool "Custom tarball"

            
            	help

            
            	  This option allows to specify a URL pointing to a kernel

            
            	  source tarball. This URL can use any protocol recognized by

            
            	  Buildroot, like http://, ftp://, file:// or scp://.


            	  When pointing to a local tarball using file://, you may want

            
            	  to use a make variable like $(TOPDIR) to reference the root of

            
            	  the Buildroot tree.


            config BR2_LINUX_KERNEL_CUSTOM_GIT

            
            	bool "Custom Git repository"

            
            	help

            
            	  This option allows Buildroot to get the Linux kernel source

            
            	  code from a Git repository.


            config BR2_LINUX_KERNEL_CUSTOM_HG

            
            	bool "Custom Mercurial repository"

            
            	help

            
            	  This option allows Buildroot to get the Linux kernel source

            
            	  code from a Mercurial repository.


            config BR2_LINUX_KERNEL_CUSTOM_SVN

            
            	bool "Custom Subversion repository"

            
            	help

            
            	  This option allows Buildroot to get the Linux kernel source

            
            	  code from a Subversion repository.


            endchoice


            config BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE

            
            	string "Kernel version"

            
            	depends on BR2_LINUX_KERNEL_CUSTOM_VERSION


            config BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION

            
            	string "URL of custom kernel tarball"

            
            	depends on BR2_LINUX_KERNEL_CUSTOM_TARBALL


            if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG || BR2_LINUX_KERNEL_CUSTOM_SVN


            config BR2_LINUX_KERNEL_CUSTOM_REPO_URL

            
            	string "URL of custom repository"


            config BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION

            
            	string "Custom repository version"

            
            	help

            
            	  Revision to use in the typical format used by

            
            	  Git/Mercurial/Subversion E.G. a sha id, a tag, branch, ..


            endif


            config BR2_LINUX_KERNEL_CUSTOM_REPO_GIT_SUBMODULES

            
            	bool "Download also git submodules"

            
            	depends on BR2_LINUX_KERNEL_CUSTOM_GIT

            
            	help

            
            	  Include git submodules in the kernel source tree.


            config BR2_LINUX_KERNEL_VERSION

            
            	string

            
            	default "7.2.12" if BR2_LINUX_KERNEL_LATEST_VERSION

            
            	default "6.18.58" if BR2_LINUX_KERNEL_LATEST_6_18

            
            	default "6.12.114" if BR2_LINUX_KERNEL_LATEST_6_12

            
            	default "6.6.160" if BR2_LINUX_KERNEL_LATEST_6_6

            
            	default "6.1.190" if BR2_LINUX_KERNEL_LATEST_6_1

            
            	default "5.15.223" if BR2_LINUX_KERNEL_LATEST_5_15

            
            	default "5.10.272" if BR2_LINUX_KERNEL_LATEST_5_10

            
            	default "5.10.254-cip72" if BR2_LINUX_KERNEL_LATEST_CIP_VERSION

            
            	default "5.10.254-cip72-rt32" if BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION

            
            	default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE \

            
            		if BR2_LINUX_KERNEL_CUSTOM_VERSION

            
            	default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL

            
            	default BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION \

            
            		if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG || BR2_LINUX_KERNEL_CUSTOM_SVN


            config BR2_LINUX_KERNEL_LICENSE_FILES

            
            	string "Kernel license files" if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG || \

            
            		BR2_LINUX_KERNEL_CUSTOM_SVN || BR2_LINUX_KERNEL_CUSTOM_VERSION || BR2_LINUX_KERNEL_CUSTOM_TARBALL

            
            	default "COPYING LICENSES/preferred/GPL-2.0 LICENSES/exceptions/Linux-syscall-note"

            
            	help

            
            	  A space-separated list of license files related to the Linux

            
            	  kernel package.


            #

            
            # Patch selection

            
            #


            config BR2_LINUX_KERNEL_PATCH

            
            	string "Custom kernel patches"

            
            	help

            
            	  A space-separated list of patches to apply to the

            
            	  kernel. Each patch can be described as an URL, a local file

            
            	  path, or a directory. In the case of a directory, all files

            
            	  matching *.patch in the directory will be applied.


            #

            
            # Configuration selection

            
            #


            choice

            
            	prompt "Kernel configuration"

            
            	default BR2_LINUX_KERNEL_USE_DEFCONFIG


            config BR2_LINUX_KERNEL_USE_DEFCONFIG

            
            	bool "Using an in-tree defconfig file"


            config BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG

            
            	bool "Use the architecture default configuration"

            
            	# We know that the default configuration on many architectures

            
            	# requires host-openssl, so select it for the latest kernel

            
            	# version and the latest CIP version.

            
            	# This is mainly needed to fix autobuilder testing.

            
            	select BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL if BR2_LINUX_KERNEL_LATEST_SERIES

            
            	help

            
            	  This option will use the default configuration for the

            
            	  selected architecture. I.e, it is equivalent to running

            
            	  "make ARCH=<foo> defconfig". This is useful on architectures

            
            	  that have a single defconfig file, such as ARM64.


            config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG

            
            	bool "Using a custom (def)config file"


            endchoice


            config BR2_LINUX_KERNEL_DEFCONFIG

            
            	string "Defconfig name"

            
            	depends on BR2_LINUX_KERNEL_USE_DEFCONFIG

            
            	help

            
            	  Name of the kernel defconfig file to use, without the

            
            	  trailing _defconfig.  The defconfig is located in

            
            	  arch/<arch>/configs in the kernel tree.


            config BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE

            
            	string "Configuration file path"

            
            	depends on BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG

            
            	help

            
            	  Path to the kernel configuration file


            	  Note: this can be a defconfig file or a complete .config file,

            
            	  which can later be saved back with make

            
            	  linux-update-(def)config.


            config BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES

            
            	string "Additional configuration fragment files"

            
            	help

            
            	  A space-separated list of kernel configuration fragment files,

            
            	  that will be merged to the main kernel configuration file.


            config BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH

            
            	string "Custom boot logo file path"

            
            	help

            
            	  Use a custom Linux framebuffer boot logo.

            
            	  Custom logo should be in PNG or JPEG format, it will be

            
            	  converted to the linux kernel format (224 colors only)

            
            	  and copied over the original logo file.


            #

            
            # Binary format

            
            #


            choice

            
            	prompt "Kernel binary format"

            
            	default BR2_LINUX_KERNEL_ZIMAGE if BR2_arm || BR2_armeb


            config BR2_LINUX_KERNEL_UIMAGE

            
            	bool "uImage"

            
            	depends on BR2_arc || BR2_arm || BR2_armeb || \

            
            		   BR2_powerpc || BR2_powerpc64 || BR2_powerpc64le || \

            
            		   BR2_sh || BR2_mips || BR2_mipsel || \

            
            		   BR2_mips64 || BR2_mips64el || BR2_xtensa

            
            	select BR2_PACKAGE_HOST_UBOOT_TOOLS


            config BR2_LINUX_KERNEL_APPENDED_UIMAGE

            
            	bool "uImage with appended DT"

            
            	depends on BR2_arm || BR2_armeb

            
            	select BR2_LINUX_KERNEL_DTS_SUPPORT

            
            	select BR2_LINUX_KERNEL_APPENDED_DTB

            
            	select BR2_PACKAGE_HOST_UBOOT_TOOLS


            config BR2_LINUX_KERNEL_BZIMAGE

            
            	bool "bzImage"

            
            	depends on BR2_i386 || BR2_x86_64 || BR2_s390x


            config BR2_LINUX_KERNEL_ZIMAGE

            
            	bool "zImage"

            
            	depends on BR2_arm || BR2_armeb || BR2_powerpc || \

            
            		   BR2_powerpc64 || BR2_powerpc64le || BR2_sparc || \

            
            		   BR2_sh || BR2_xtensa


            config BR2_LINUX_KERNEL_ZIMAGE_EPAPR

            
            	bool "zImage.epapr"

            
            	depends on BR2_powerpc64 || BR2_powerpc64le


            config BR2_LINUX_KERNEL_APPENDED_ZIMAGE

            
            	bool "zImage with appended DT"

            
            	depends on BR2_arm || BR2_armeb

            
            	select BR2_LINUX_KERNEL_DTS_SUPPORT

            
            	select BR2_LINUX_KERNEL_APPENDED_DTB


            config BR2_LINUX_KERNEL_CUIMAGE

            
            	bool "cuImage"

            
            	depends on BR2_powerpc

            
            	select BR2_PACKAGE_HOST_UBOOT_TOOLS

            
            	select BR2_LINUX_KERNEL_DTS_SUPPORT

            
            	select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT


            config BR2_LINUX_KERNEL_SIMPLEIMAGE

            
            	bool "simpleImage"

            
            	depends on BR2_microblaze

            
            	select BR2_PACKAGE_HOST_UBOOT_TOOLS

            
            	select BR2_LINUX_KERNEL_DTS_SUPPORT

            
            	select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT


            config BR2_LINUX_KERNEL_IMAGE

            
            	bool "Image"

            
            	depends on BR2_aarch64 || BR2_aarch64_be || BR2_riscv


            config BR2_LINUX_KERNEL_IMAGEGZ

            
            	bool "Image.gz"

            
            	depends on BR2_aarch64 || BR2_aarch64_be || BR2_riscv


            config BR2_LINUX_KERNEL_LINUX_BIN

            
            	bool "linux.bin"

            
            	depends on BR2_microblaze

            
            	select BR2_PACKAGE_HOST_UBOOT_TOOLS


            config BR2_LINUX_KERNEL_VMLINUX_BIN

            
            	bool "vmlinux.bin"

            
            	depends on BR2_mips || BR2_mipsel || BR2_sh


            config BR2_LINUX_KERNEL_VMLINUX_EFI

            
            	bool "vmlinux.efi"

            
            	depends on BR2_loongarch64


            config BR2_LINUX_KERNEL_VMLINUX

            
            	bool "vmlinux"


            config BR2_LINUX_KERNEL_VMLINUZ

            
            	bool "vmlinuz"

            
            	depends on BR2_mips || BR2_mipsel


            config BR2_LINUX_KERNEL_VMLINUZ_BIN

            
            	bool "vmlinuz.bin"

            
            	depends on BR2_mips || BR2_mipsel


            config BR2_LINUX_KERNEL_VMLINUZ_EFI

            
            	bool "vmlinuz.efi"

            
            	depends on BR2_loongarch64


            config BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM

            
            	bool "custom target"

            
            	help

            
            	  For certain cases a board-specific target image must be

            
            	  used.  For example, on powerPC where the OpenFirmware

            
            	  description is attached in a board-specific kernel image

            
            	  target like 'cuImage.mpc8379_rdb'.


            	  Select this option and specify the make target in "Kernel

            
            	  image target name".


            endchoice


            #

            
            # Kernel compression format

            
            #


            choice

            
            	prompt "Kernel compression format"

            
            	help

            
            	  This selection will just ensure that the correct host tools

            
            	  are built. The actual compression for the kernel should be

            
            	  selected in the kernel configuration menu.


            config BR2_LINUX_KERNEL_GZIP

            
            	bool "gzip compression"


            config BR2_LINUX_KERNEL_LZ4

            
            	bool "lz4 compression"


            config BR2_LINUX_KERNEL_LZMA

            
            	bool "lzma compression"


            config BR2_LINUX_KERNEL_LZO

            
            	bool "lzo compression"


            config BR2_LINUX_KERNEL_XZ

            
            	bool "xz compression"


            config BR2_LINUX_KERNEL_ZSTD

            
            	bool "zstd compression"


            config BR2_LINUX_KERNEL_UNCOMPRESSED

            
            	bool "uncompressed"

            
            	depends on BR2_s390x


            endchoice


            config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME

            
            	string "Kernel image target name"

            
            	depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM

            
            	help

            
            	  Specify the kernel make target to build the kernel that you

            
            	  need.


            config BR2_LINUX_KERNEL_IMAGE_NAME

            
            	string "Kernel image name"

            
            	depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM

            
            	help

            
            	  The filename of the kernel image, if it is different from

            
            	  the make target (above). Defaults to

            
            	  BR2_LINUX_KERNEL_IMAGE_TARGET_NAME. If specified, the

            
            	  filename is relative to arch/ARCH/boot/.


            	  If unsure, leave it empty.


            config BR2_LINUX_KERNEL_UIMAGE_LOADADDR

            
            	string "load address (for 3.7+ multi-platform image)"

            
            	depends on BR2_arm || BR2_armeb

            
            	depends on BR2_LINUX_KERNEL_UIMAGE || BR2_LINUX_KERNEL_APPENDED_UIMAGE

            
            	help

            
            	  If your ARM system's Linux kernel is configured with the new

            
            	  (3.7+) multi-architecture support (CONFIG_ARCH_MULTIPLATFORM=y

            
            	  in your kernel config), then it is necessary to specify a

            
            	  kernel load address when building the uImage. This should be a

            
            	  hexadecimal string beginning with 0x, for example: 0x00008000.


            	  If unsure, let this option empty.


            config BR2_LINUX_KERNEL_DTS_SUPPORT

            
            	bool "Build a Device Tree Blob (DTB)"

            
            	help

            
            	  Compile one or more device tree sources into device tree

            
            	  blobs.

            
            	  Select the dts files to compile in the options below.


            if BR2_LINUX_KERNEL_DTS_SUPPORT


            # We have mainly three cases when it comes to device tree support:

            
            #   1) We don't want any support at all. Then the ..DTS_SUPPORT

            
            #      variable won't be set

            
            #   2) We want device tree support, so we need the user to enter the

            
            #      device tree name or the path to the custom device he uses, but

            
            #      the kernel abstracts this from us and only build an image that

            
            #      looks like a regular kernel image. In this case, we only need

            
            #      to derive the kernel image name from the given device tree

            
            #      name, and all the rest is as usual

            
            #   3) We want device tree support, but the kernel requires us to

            
            #      build the device tree blob separately. In this case, some

            
            #      more logic will be needed.

            
            # The variable below address the second case, were you only want

            
            # limited actions from buildroot.

            
            config BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT

            
            	bool "DTB is built by kernel itself"

            
            	help

            
            	  Normally, the device tree(s) to be built have to be passed

            
            	  explicitly to the kernel build system. For some binary

            
            	  formats, however, the kernel build system links in the

            
            	  device tree directly in the kernel binary. Select this option

            
            	  if you have such a kernel binary format.


            config BR2_LINUX_KERNEL_APPENDED_DTB

            
            	bool


            config BR2_LINUX_KERNEL_INTREE_DTS_NAME

            
            	string "In-tree Device Tree Source file names"

            
            	help

            
            	  Name of in-tree device tree source file, without

            
            	  the trailing .dts. You can provide a list of

            
            	  dts files to build, separated by spaces.


            config BR2_LINUX_KERNEL_INTREE_DTSO_NAMES

            
            	string "In-tree Device Tree Overlay file names"

            
            	help

            
            	  Names of in-tree device tree overlay, without the trailing

            
            	  .dtso which should be built and installed into the target

            
            	  system, separated by spaces.


            config BR2_LINUX_KERNEL_CUSTOM_DTS_PATH

            
            	string "Out-of-tree Device Tree Source file paths"

            
            	depends on BR2_LINUX_KERNEL_CUSTOM_DTS_DIR = ""

            
            	help

            
            	  Paths to out-of-tree Device Tree Source (.dts), Device Tree

            
            	  Source Include (.dtsi) and Device Tree Overlay Source (.dtso)

            
            	  files, separated by spaces. These files will be copied to the

            
            	  kernel sources and the .dts files will

            
            	  be compiled from there.


            	  Due to a kernel build system changes in 6.12,

            
            	  BR2_LINUX_KERNEL_CUSTOM_DTS_PATH is now deprecated and

            
            	  replaced by BR2_LINUX_KERNEL_CUSTOM_DTS_DIR


            config BR2_LINUX_KERNEL_CUSTOM_DTS_DIR

            
            	string "Out-of-tree Device Tree Source overlay directories"

            
            	help

            
            	  Specify a list of directories that are copied as-is over the

            
            	  arch/<arch>/boot/dts/ directory before building the device

            
            	  tree blob.


            	  This overlay can contain dts, dtso and dtsi files.


            	  BR2_LINUX_KERNEL_CUSTOM_DTS_DIR should point to one or more

            
            	  directories containing a vendor subdirectory (e.g. rockchip)

            
            	  which contains the dts files. This vendor subdirectory should

            
            	  match the vendor subdirectory used by the board in the kernel

            
            	  (e.g. arch/arm64/boot/dts/rockchip/).


            	  While most architectures make use of vendor subdirectories,

            
            	  like arm, arm64 and riscv, some architectures like powerpc

            
            	  and xtensa do not.

            
            	  In this case, BR2_LINUX_KERNEL_CUSTOM_DTS_DIR should point to

            
            	  a directory containing the dts files directly.


            	  Since the 6.12 release, each out-of-tree Device Tree Source

            
            	  file must be copied into their corresponding sub-directory.


            config BR2_LINUX_KERNEL_DTB_KEEP_DIRNAME

            
            	bool "Keep the directory name of the Device Tree"

            
            	help

            
            	  If enabled, the device tree blobs keep their

            
            	  directory prefixes when they get copied to the

            
            	  output image directory or the target directory.


            config BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT

            
            	bool "Build Device Tree with overlay support"

            
            	help

            
            	  If enabled, pass the "-@" option to dtc, such that

            
            	  symbols are generated in the compiled Device Tree.

            
            	  Choose this option to support Device Tree overlays

            
            	  on the target system.


            endif


            config BR2_LINUX_KERNEL_INSTALL_TARGET

            
            	bool "Install kernel image to /boot in target"

            
            	depends on !BR2_TARGET_ROOTFS_INITRAMFS

            
            	help

            
            	  Select this option to have the kernel image installed to

            
            	  /boot in the target root filesystem, as is typically done on

            
            	  x86/x86_64 systems.


            	  Note that this option also installs the Device Tree Blobs to

            
            	  /boot if DTBs have been generated by the kernel build

            
            	  process.


            config BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL

            
            	bool "Needs host OpenSSL"

            
            	help

            
            	  Some Linux kernel configuration options (such as

            
            	  CONFIG_SYSTEM_TRUSTED_KEYRING) require building a host

            
            	  program called extract-cert, which itself needs

            
            	  OpenSSL. Enabling this option will ensure host-openssl gets

            
            	  built before the Linux kernel.


            	  Enable this option if you get a Linux kernel build failure

            
            	  such as "scripts/extract-cert.c:21:25: fatal error:

            
            	  openssl/bio.h: No such file or directory".


            config BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF

            
            	bool "Needs host libelf"

            
            	help

            
            	  Some Linux kernel configuration options (such as

            
            	  CONFIG_UNWINDER_ORC) require building a host program that

            
            	  needs libelf. Enabling this option will ensure host-elfutils

            
            	  (which provides libelf) gets built before the Linux kernel.


            	  Enable this option if you get a Linux kernel build failure

            
            	  such as "Cannot generate ORC metadata for

            
            	  CONFIG_UNWINDER_ORC=y, please install libelf-dev,

            
            	  libelf-devel or elfutils-libelf-devel".


            config BR2_LINUX_KERNEL_NEEDS_HOST_PAHOLE

            
            	bool "Needs host pahole"

            
            	help

            
            	  Some Linux kernel configuration options (such as

            
            	  CONFIG_DEBUG_INFO_BTF) require building a host program

            
            	  called pahole. Enabling this option will ensure host-pahole

            
            	  gets built before the Linux kernel.


            	  Enable this option if you get a Linux kernel build failure

            
            	  such as "BTF: .tmp_vmlinux.btf: pahole (pahole) is not

            
            	  available".


            config BR2_LINUX_KERNEL_NEEDS_HOST_PYTHON3

            
            	bool "Needs host python3"

            
            	help

            
            	  Some Linux kernel configuration options (such as the

            
            	  CONFIG_DRM_MSM in v6.10 and greater) require a host python3

            
            	  interpreter. Enabling this option will ensure host-python3

            
            	  gets built before the Linux kernel.


            	  Enable this option if you get a Linux kernel build failure

            
            	  such as "python3: not found".


            # Linux extensions

            
            source "linux/Config.ext.in"


            # Linux tools

            
            source "package/linux-tools/Config.in"


            endif # BR2_LINUX_KERNEL


            endmenu
	menu "Kernel"

	config BR2_LINUX_KERNEL
	bool "Linux Kernel"
	select BR2_PACKAGE_HOST_KMOD # Unconditional, even if modules not enabled
	select BR2_PACKAGE_HOST_IMAGEMAGICK if BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH != ""
	# mips always generates an ITB image
	select BR2_PACKAGE_HOST_UBOOT_TOOLS if BR2_mips \|\| BR2_mipsel \|\| BR2_mips64 \|\| BR2_mips64el
	select BR2_PACKAGE_HOST_UBOOT_TOOLS_FIT_SUPPORT if BR2_mips \|\| BR2_mipsel \|\| BR2_mips64 \|\| BR2_mips64el
	help
	Enable this option if you want to build a Linux kernel for
	your embedded device

	https://www.kernel.org/

	if BR2_LINUX_KERNEL

	# Packages that need to have a kernel with support for loadable modules,
	# but do not use the kernel-modules infrastructure, should select that
	# option.
	config BR2_LINUX_NEEDS_MODULES
	bool

	config BR2_LINUX_KERNEL_LATEST_SERIES
	# Helper symbol to indicate if one of the "latest" kernel
	# (either the very latest one or from a longterm supported series)
	# has been selected
	bool

	#
	# Version selection. We provide the choice between:
	#
	# 1. A single fairly recent stable kernel version
	# 2. A custom stable version
	# 3. A custom tarball
	# 4. A set of custom repository locations
	#
	choice
	prompt "Kernel version"

	config BR2_LINUX_KERNEL_LATEST_VERSION
	bool "Latest version (7.2)"
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_7_2 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES

	config BR2_LINUX_KERNEL_LATEST_6_18
	bool "Long term 6.18"
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_18 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES

	config BR2_LINUX_KERNEL_LATEST_6_12
	bool "Long term 6.12"
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_12 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES

	config BR2_LINUX_KERNEL_LATEST_6_6
	bool "Long term 6.6"
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_12 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES

	config BR2_LINUX_KERNEL_LATEST_6_1
	bool "Long term 6.1"
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_6_1 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES

	config BR2_LINUX_KERNEL_LATEST_5_15
	bool "Long term 5.15"
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_15 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES

	config BR2_LINUX_KERNEL_LATEST_5_10
	bool "Long term 5.10"
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES

	config BR2_LINUX_KERNEL_LATEST_CIP_VERSION
	bool "Latest CIP SLTS version (5.10.254-cip72)"
	# Support was introduced in Linux 5.19
	depends on !BR2_loongarch64
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES
	help
	CIP launched in the spring of 2016 to address the needs of
	organizations in industries such as power generation and
	distribution, water, oil and gas, transportation, building
	automation and more for reliable and secure Linux-based
	embedded systems that can be sustained over a period of
	10 to as many as 60 years.
	The project's goal is to provide an open source base layer
	of industrial-grade software that permits the use and
	implementation of software building blocks that meet
	these requirements.

	The CIP community plans to maintain 5.10 for security and
	bug fixes for more than 10 years.

	https://www.cip-project.org

	config BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION
	bool "Latest CIP RT SLTS version (5.10.254-cip72-rt32)"
	# Support was introduced in Linux 5.19
	depends on !BR2_loongarch64
	select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10 if BR2_KERNEL_HEADERS_AS_KERNEL
	select BR2_LINUX_KERNEL_LATEST_SERIES
	help
	Same as the CIP version, but this is the PREEMPT_RT realtime
	variant.

	The CIP community plans to maintain 5.10 for security and
	bug fixes for more than 10 years.

	https://www.cip-project.org

	config BR2_LINUX_KERNEL_CUSTOM_VERSION
	bool "Custom version"
	help
	This option allows to use a specific official version from
	kernel.org, like 2.6.x, 2.6.x.y, 3.x.y, ...

	Note: you cannot use this option to select a _longterm_ 2.6
	kernel, because these kernels are not located at the standard
	URL at kernel.org. Instead, select "Custom tarball" and
	specify the right URL directly.

	config BR2_LINUX_KERNEL_CUSTOM_TARBALL
	bool "Custom tarball"
	help
	This option allows to specify a URL pointing to a kernel
	source tarball. This URL can use any protocol recognized by
	Buildroot, like http://, ftp://, file:// or scp://.

	When pointing to a local tarball using file://, you may want
	to use a make variable like $(TOPDIR) to reference the root of
	the Buildroot tree.

	config BR2_LINUX_KERNEL_CUSTOM_GIT
	bool "Custom Git repository"
	help
	This option allows Buildroot to get the Linux kernel source
	code from a Git repository.

	config BR2_LINUX_KERNEL_CUSTOM_HG
	bool "Custom Mercurial repository"
	help
	This option allows Buildroot to get the Linux kernel source
	code from a Mercurial repository.

	config BR2_LINUX_KERNEL_CUSTOM_SVN
	bool "Custom Subversion repository"
	help
	This option allows Buildroot to get the Linux kernel source
	code from a Subversion repository.

	endchoice

	config BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE
	string "Kernel version"
	depends on BR2_LINUX_KERNEL_CUSTOM_VERSION

	config BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION
	string "URL of custom kernel tarball"
	depends on BR2_LINUX_KERNEL_CUSTOM_TARBALL

	if BR2_LINUX_KERNEL_CUSTOM_GIT \|\| BR2_LINUX_KERNEL_CUSTOM_HG \|\| BR2_LINUX_KERNEL_CUSTOM_SVN

	config BR2_LINUX_KERNEL_CUSTOM_REPO_URL
	string "URL of custom repository"

	config BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION
	string "Custom repository version"
	help
	Revision to use in the typical format used by
	Git/Mercurial/Subversion E.G. a sha id, a tag, branch, ..

	endif

	config BR2_LINUX_KERNEL_CUSTOM_REPO_GIT_SUBMODULES
	bool "Download also git submodules"
	depends on BR2_LINUX_KERNEL_CUSTOM_GIT
	help
	Include git submodules in the kernel source tree.

	config BR2_LINUX_KERNEL_VERSION
	string
	default "7.2.12" if BR2_LINUX_KERNEL_LATEST_VERSION
	default "6.18.58" if BR2_LINUX_KERNEL_LATEST_6_18
	default "6.12.114" if BR2_LINUX_KERNEL_LATEST_6_12
	default "6.6.160" if BR2_LINUX_KERNEL_LATEST_6_6
	default "6.1.190" if BR2_LINUX_KERNEL_LATEST_6_1
	default "5.15.223" if BR2_LINUX_KERNEL_LATEST_5_15
	default "5.10.272" if BR2_LINUX_KERNEL_LATEST_5_10
	default "5.10.254-cip72" if BR2_LINUX_KERNEL_LATEST_CIP_VERSION
	default "5.10.254-cip72-rt32" if BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION
	default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE \
	if BR2_LINUX_KERNEL_CUSTOM_VERSION
	default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL
	default BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION \
	if BR2_LINUX_KERNEL_CUSTOM_GIT \|\| BR2_LINUX_KERNEL_CUSTOM_HG \|\| BR2_LINUX_KERNEL_CUSTOM_SVN

	config BR2_LINUX_KERNEL_LICENSE_FILES
	string "Kernel license files" if BR2_LINUX_KERNEL_CUSTOM_GIT \|\| BR2_LINUX_KERNEL_CUSTOM_HG \|\| \
	BR2_LINUX_KERNEL_CUSTOM_SVN \|\| BR2_LINUX_KERNEL_CUSTOM_VERSION \|\| BR2_LINUX_KERNEL_CUSTOM_TARBALL
	default "COPYING LICENSES/preferred/GPL-2.0 LICENSES/exceptions/Linux-syscall-note"
	help
	A space-separated list of license files related to the Linux
	kernel package.

	#
	# Patch selection
	#

	config BR2_LINUX_KERNEL_PATCH
	string "Custom kernel patches"
	help
	A space-separated list of patches to apply to the
	kernel. Each patch can be described as an URL, a local file
	path, or a directory. In the case of a directory, all files
	matching *.patch in the directory will be applied.

	#
	# Configuration selection
	#

	choice
	prompt "Kernel configuration"
	default BR2_LINUX_KERNEL_USE_DEFCONFIG

	config BR2_LINUX_KERNEL_USE_DEFCONFIG
	bool "Using an in-tree defconfig file"

	config BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG
	bool "Use the architecture default configuration"
	# We know that the default configuration on many architectures
	# requires host-openssl, so select it for the latest kernel
	# version and the latest CIP version.
	# This is mainly needed to fix autobuilder testing.
	select BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL if BR2_LINUX_KERNEL_LATEST_SERIES
	help
	This option will use the default configuration for the
	selected architecture. I.e, it is equivalent to running
	"make ARCH=<foo> defconfig". This is useful on architectures
	that have a single defconfig file, such as ARM64.

	config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
	bool "Using a custom (def)config file"

	endchoice

	config BR2_LINUX_KERNEL_DEFCONFIG
	string "Defconfig name"
	depends on BR2_LINUX_KERNEL_USE_DEFCONFIG
	help
	Name of the kernel defconfig file to use, without the
	trailing _defconfig. The defconfig is located in
	arch/<arch>/configs in the kernel tree.

	config BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE
	string "Configuration file path"
	depends on BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
	help
	Path to the kernel configuration file

	Note: this can be a defconfig file or a complete .config file,
	which can later be saved back with make
	linux-update-(def)config.

	config BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES
	string "Additional configuration fragment files"
	help
	A space-separated list of kernel configuration fragment files,
	that will be merged to the main kernel configuration file.

	config BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH
	string "Custom boot logo file path"
	help
	Use a custom Linux framebuffer boot logo.
	Custom logo should be in PNG or JPEG format, it will be
	converted to the linux kernel format (224 colors only)
	and copied over the original logo file.

	#
	# Binary format
	#

	choice
	prompt "Kernel binary format"
	default BR2_LINUX_KERNEL_ZIMAGE if BR2_arm \|\| BR2_armeb

	config BR2_LINUX_KERNEL_UIMAGE
	bool "uImage"
	depends on BR2_arc \|\| BR2_arm \|\| BR2_armeb \|\| \
	BR2_powerpc \|\| BR2_powerpc64 \|\| BR2_powerpc64le \|\| \
	BR2_sh \|\| BR2_mips \|\| BR2_mipsel \|\| \
	BR2_mips64 \|\| BR2_mips64el \|\| BR2_xtensa
	select BR2_PACKAGE_HOST_UBOOT_TOOLS

	config BR2_LINUX_KERNEL_APPENDED_UIMAGE
	bool "uImage with appended DT"
	depends on BR2_arm \|\| BR2_armeb
	select BR2_LINUX_KERNEL_DTS_SUPPORT
	select BR2_LINUX_KERNEL_APPENDED_DTB
	select BR2_PACKAGE_HOST_UBOOT_TOOLS

	config BR2_LINUX_KERNEL_BZIMAGE
	bool "bzImage"
	depends on BR2_i386 \|\| BR2_x86_64 \|\| BR2_s390x

	config BR2_LINUX_KERNEL_ZIMAGE
	bool "zImage"
	depends on BR2_arm \|\| BR2_armeb \|\| BR2_powerpc \|\| \
	BR2_powerpc64 \|\| BR2_powerpc64le \|\| BR2_sparc \|\| \
	BR2_sh \|\| BR2_xtensa

	config BR2_LINUX_KERNEL_ZIMAGE_EPAPR
	bool "zImage.epapr"
	depends on BR2_powerpc64 \|\| BR2_powerpc64le

	config BR2_LINUX_KERNEL_APPENDED_ZIMAGE
	bool "zImage with appended DT"
	depends on BR2_arm \|\| BR2_armeb
	select BR2_LINUX_KERNEL_DTS_SUPPORT
	select BR2_LINUX_KERNEL_APPENDED_DTB

	config BR2_LINUX_KERNEL_CUIMAGE
	bool "cuImage"
	depends on BR2_powerpc
	select BR2_PACKAGE_HOST_UBOOT_TOOLS
	select BR2_LINUX_KERNEL_DTS_SUPPORT
	select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT

	config BR2_LINUX_KERNEL_SIMPLEIMAGE
	bool "simpleImage"
	depends on BR2_microblaze
	select BR2_PACKAGE_HOST_UBOOT_TOOLS
	select BR2_LINUX_KERNEL_DTS_SUPPORT
	select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT

	config BR2_LINUX_KERNEL_IMAGE
	bool "Image"
	depends on BR2_aarch64 \|\| BR2_aarch64_be \|\| BR2_riscv

	config BR2_LINUX_KERNEL_IMAGEGZ
	bool "Image.gz"
	depends on BR2_aarch64 \|\| BR2_aarch64_be \|\| BR2_riscv

	config BR2_LINUX_KERNEL_LINUX_BIN
	bool "linux.bin"
	depends on BR2_microblaze
	select BR2_PACKAGE_HOST_UBOOT_TOOLS

	config BR2_LINUX_KERNEL_VMLINUX_BIN
	bool "vmlinux.bin"
	depends on BR2_mips \|\| BR2_mipsel \|\| BR2_sh

	config BR2_LINUX_KERNEL_VMLINUX_EFI
	bool "vmlinux.efi"
	depends on BR2_loongarch64

	config BR2_LINUX_KERNEL_VMLINUX
	bool "vmlinux"

	config BR2_LINUX_KERNEL_VMLINUZ
	bool "vmlinuz"
	depends on BR2_mips \|\| BR2_mipsel

	config BR2_LINUX_KERNEL_VMLINUZ_BIN
	bool "vmlinuz.bin"
	depends on BR2_mips \|\| BR2_mipsel

	config BR2_LINUX_KERNEL_VMLINUZ_EFI
	bool "vmlinuz.efi"
	depends on BR2_loongarch64

	config BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	bool "custom target"
	help
	For certain cases a board-specific target image must be
	used. For example, on powerPC where the OpenFirmware
	description is attached in a board-specific kernel image
	target like 'cuImage.mpc8379_rdb'.

	Select this option and specify the make target in "Kernel
	image target name".

	endchoice

	#
	# Kernel compression format
	#

	choice
	prompt "Kernel compression format"
	help
	This selection will just ensure that the correct host tools
	are built. The actual compression for the kernel should be
	selected in the kernel configuration menu.

	config BR2_LINUX_KERNEL_GZIP
	bool "gzip compression"

	config BR2_LINUX_KERNEL_LZ4
	bool "lz4 compression"

	config BR2_LINUX_KERNEL_LZMA
	bool "lzma compression"

	config BR2_LINUX_KERNEL_LZO
	bool "lzo compression"

	config BR2_LINUX_KERNEL_XZ
	bool "xz compression"

	config BR2_LINUX_KERNEL_ZSTD
	bool "zstd compression"

	config BR2_LINUX_KERNEL_UNCOMPRESSED
	bool "uncompressed"
	depends on BR2_s390x

	endchoice

	config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME
	string "Kernel image target name"
	depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	help
	Specify the kernel make target to build the kernel that you
	need.

	config BR2_LINUX_KERNEL_IMAGE_NAME
	string "Kernel image name"
	depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
	help
	The filename of the kernel image, if it is different from
	the make target (above). Defaults to
	BR2_LINUX_KERNEL_IMAGE_TARGET_NAME. If specified, the
	filename is relative to arch/ARCH/boot/.

	If unsure, leave it empty.

	config BR2_LINUX_KERNEL_UIMAGE_LOADADDR
	string "load address (for 3.7+ multi-platform image)"
	depends on BR2_arm \|\| BR2_armeb
	depends on BR2_LINUX_KERNEL_UIMAGE \|\| BR2_LINUX_KERNEL_APPENDED_UIMAGE
	help
	If your ARM system's Linux kernel is configured with the new
	(3.7+) multi-architecture support (CONFIG_ARCH_MULTIPLATFORM=y
	in your kernel config), then it is necessary to specify a
	kernel load address when building the uImage. This should be a
	hexadecimal string beginning with 0x, for example: 0x00008000.

	If unsure, let this option empty.

	config BR2_LINUX_KERNEL_DTS_SUPPORT
	bool "Build a Device Tree Blob (DTB)"
	help
	Compile one or more device tree sources into device tree
	blobs.
	Select the dts files to compile in the options below.

	if BR2_LINUX_KERNEL_DTS_SUPPORT

	# We have mainly three cases when it comes to device tree support:
	# 1) We don't want any support at all. Then the ..DTS_SUPPORT
	# variable won't be set
	# 2) We want device tree support, so we need the user to enter the
	# device tree name or the path to the custom device he uses, but
	# the kernel abstracts this from us and only build an image that
	# looks like a regular kernel image. In this case, we only need
	# to derive the kernel image name from the given device tree
	# name, and all the rest is as usual
	# 3) We want device tree support, but the kernel requires us to
	# build the device tree blob separately. In this case, some
	# more logic will be needed.
	# The variable below address the second case, were you only want
	# limited actions from buildroot.
	config BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
	bool "DTB is built by kernel itself"
	help
	Normally, the device tree(s) to be built have to be passed
	explicitly to the kernel build system. For some binary
	formats, however, the kernel build system links in the
	device tree directly in the kernel binary. Select this option
	if you have such a kernel binary format.

	config BR2_LINUX_KERNEL_APPENDED_DTB
	bool

	config BR2_LINUX_KERNEL_INTREE_DTS_NAME
	string "In-tree Device Tree Source file names"
	help
	Name of in-tree device tree source file, without
	the trailing .dts. You can provide a list of
	dts files to build, separated by spaces.

	config BR2_LINUX_KERNEL_INTREE_DTSO_NAMES
	string "In-tree Device Tree Overlay file names"
	help
	Names of in-tree device tree overlay, without the trailing
	.dtso which should be built and installed into the target
	system, separated by spaces.

	config BR2_LINUX_KERNEL_CUSTOM_DTS_PATH
	string "Out-of-tree Device Tree Source file paths"
	depends on BR2_LINUX_KERNEL_CUSTOM_DTS_DIR = ""
	help
	Paths to out-of-tree Device Tree Source (.dts), Device Tree
	Source Include (.dtsi) and Device Tree Overlay Source (.dtso)
	files, separated by spaces. These files will be copied to the
	kernel sources and the .dts files will
	be compiled from there.

	Due to a kernel build system changes in 6.12,
	BR2_LINUX_KERNEL_CUSTOM_DTS_PATH is now deprecated and
	replaced by BR2_LINUX_KERNEL_CUSTOM_DTS_DIR

	config BR2_LINUX_KERNEL_CUSTOM_DTS_DIR
	string "Out-of-tree Device Tree Source overlay directories"
	help
	Specify a list of directories that are copied as-is over the
	arch/<arch>/boot/dts/ directory before building the device
	tree blob.

	This overlay can contain dts, dtso and dtsi files.

	BR2_LINUX_KERNEL_CUSTOM_DTS_DIR should point to one or more
	directories containing a vendor subdirectory (e.g. rockchip)
	which contains the dts files. This vendor subdirectory should
	match the vendor subdirectory used by the board in the kernel
	(e.g. arch/arm64/boot/dts/rockchip/).

	While most architectures make use of vendor subdirectories,
	like arm, arm64 and riscv, some architectures like powerpc
	and xtensa do not.
	In this case, BR2_LINUX_KERNEL_CUSTOM_DTS_DIR should point to
	a directory containing the dts files directly.

	Since the 6.12 release, each out-of-tree Device Tree Source
	file must be copied into their corresponding sub-directory.

	config BR2_LINUX_KERNEL_DTB_KEEP_DIRNAME
	bool "Keep the directory name of the Device Tree"
	help
	If enabled, the device tree blobs keep their
	directory prefixes when they get copied to the
	output image directory or the target directory.

	config BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT
	bool "Build Device Tree with overlay support"
	help
	If enabled, pass the "-@" option to dtc, such that
	symbols are generated in the compiled Device Tree.
	Choose this option to support Device Tree overlays
	on the target system.

	endif

	config BR2_LINUX_KERNEL_INSTALL_TARGET
	bool "Install kernel image to /boot in target"
	depends on !BR2_TARGET_ROOTFS_INITRAMFS
	help
	Select this option to have the kernel image installed to
	/boot in the target root filesystem, as is typically done on
	x86/x86_64 systems.

	Note that this option also installs the Device Tree Blobs to
	/boot if DTBs have been generated by the kernel build
	process.

	config BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL
	bool "Needs host OpenSSL"
	help
	Some Linux kernel configuration options (such as
	CONFIG_SYSTEM_TRUSTED_KEYRING) require building a host
	program called extract-cert, which itself needs
	OpenSSL. Enabling this option will ensure host-openssl gets
	built before the Linux kernel.

	Enable this option if you get a Linux kernel build failure
	such as "scripts/extract-cert.c:21:25: fatal error:
	openssl/bio.h: No such file or directory".

	config BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF
	bool "Needs host libelf"
	help
	Some Linux kernel configuration options (such as
	CONFIG_UNWINDER_ORC) require building a host program that
	needs libelf. Enabling this option will ensure host-elfutils
	(which provides libelf) gets built before the Linux kernel.

	Enable this option if you get a Linux kernel build failure
	such as "Cannot generate ORC metadata for
	CONFIG_UNWINDER_ORC=y, please install libelf-dev,
	libelf-devel or elfutils-libelf-devel".

	config BR2_LINUX_KERNEL_NEEDS_HOST_PAHOLE
	bool "Needs host pahole"
	help
	Some Linux kernel configuration options (such as
	CONFIG_DEBUG_INFO_BTF) require building a host program
	called pahole. Enabling this option will ensure host-pahole
	gets built before the Linux kernel.

	Enable this option if you get a Linux kernel build failure
	such as "BTF: .tmp_vmlinux.btf: pahole (pahole) is not
	available".

	config BR2_LINUX_KERNEL_NEEDS_HOST_PYTHON3
	bool "Needs host python3"
	help
	Some Linux kernel configuration options (such as the
	CONFIG_DRM_MSM in v6.10 and greater) require a host python3
	interpreter. Enabling this option will ensure host-python3
	gets built before the Linux kernel.

	Enable this option if you get a Linux kernel build failure
	such as "python3: not found".

	# Linux extensions
	source "linux/Config.ext.in"

	# Linux tools
	source "package/linux-tools/Config.in"

	endif # BR2_LINUX_KERNEL

	endmenu