menu "Kernel" config BR2_LINUX_KERNEL bool "Linux Kernel" help Enable this option if you want to build a Linux kernel for your embedded device if BR2_LINUX_KERNEL # # Version selection. We provide the choice between: # # 1. A single fairly recent stable kernel version # 2. In case an internal toolchain has been built, the same kernel # version as the kernel headers # 3. A custom stable version # 4. A custom tarball # choice prompt "Kernel version" default BR2_LINUX_KERNEL_3_4 config BR2_LINUX_KERNEL_3_4 bool "3.4.2" config BR2_LINUX_KERNEL_SAME_AS_HEADERS bool "Same as toolchain kernel headers" depends on BR2_TOOLCHAIN_BUILDROOT help This option will re-use the same kernel sources as the one that have been used for the kernel headers of the cross-compiling toolchain. Having the same version for the kernel running on the system and for the kernel headers is not a requirement, but using the same version allows to download only one tarball of the kernel sources. config BR2_LINUX_KERNEL_CUSTOM_VERSION bool "Custom version" help This option allows to use a specific 2.6.x or 2.6.x.y official versions, as available on kernel.org config BR2_LINUX_KERNEL_CUSTOM_TARBALL bool "Custom tarball" help This option allows to specify the http or ftp location of a specific kernel source tarball config BR2_LINUX_KERNEL_CUSTOM_GIT bool "Custom Git tree" help This option allows Buildroot to get the Linux kernel source code from a Git 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 config BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL string "URL of custom Git repository" depends on BR2_LINUX_KERNEL_CUSTOM_GIT config BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION string "Custom Git version" default "HEAD" depends on BR2_LINUX_KERNEL_CUSTOM_GIT help Git revision to use in the format used by git rev-parse, E.G. a sha id, a tag, branch, .. config BR2_LINUX_KERNEL_VERSION string default "3.4.2" if BR2_LINUX_KERNEL_3_4 default BR2_DEFAULT_KERNEL_HEADERS if BR2_LINUX_KERNEL_SAME_AS_HEADERS 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_GIT_VERSION if BR2_LINUX_KERNEL_CUSTOM_GIT # # 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 linux-*.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 a defconfig" config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG bool "Using a custom config file" endchoice config BR2_LINUX_KERNEL_DEFCONFIG string "Defconfig name" depends on BR2_LINUX_KERNEL_USE_DEFCONFIG help Name of the defconfig file to use, without the trailing _defconfig 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 config BR2_LINUX_KERNEL_DTS_FILE string "Device Tree dts file location" depends on BR2_microblaze help Path from where the dts file has to be copied The final "custom target" name depends on the dts file name: .dts --> simpleImage. # # Binary format # choice prompt "Kernel binary format" config BR2_LINUX_KERNEL_UIMAGE bool "uImage" depends on BR2_arm || BR2_armeb || BR2_bfin || BR2_powerpc || BR2_avr32 || BR2_sh || BR2_sh64 config BR2_LINUX_KERNEL_BZIMAGE bool "bzImage" depends on BR2_i386 || BR2_x86_64 config BR2_LINUX_KERNEL_ZIMAGE bool "zImage" depends on BR2_arm || BR2_armeb || BR2_powerpc || BR2_sparc || BR2_sh || BR2_sh64 || BR2_xtensa config BR2_LINUX_KERNEL_VMLINUX_BIN bool "vmlinux.bin" depends on BR2_mips || BR2_mipsel || BR2_sh || BR2_sh64 config BR2_LINUX_KERNEL_VMLINUX bool "vmlinux" config BR2_LINUX_KERNEL_VMLINUZ bool "vmlinuz" depends on BR2_mips || BR2_mipsel 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 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_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. # Linux extensions source "linux/Config.ext.in" endif # BR2_LINUX_KERNEL endmenu