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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_2
config BR2_LINUX_KERNEL_3_2
bool "3.2"
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
default "3.2"
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"
depends on BR2_LINUX_KERNEL_CUSTOM_GIT
config BR2_LINUX_KERNEL_VERSION
string
default "3.2" if BR2_LINUX_KERNEL_3_2
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
#
# 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
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