buildroot

################################################################################

#

# Linux kernel target

#

################################################################################

​

LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))

LINUX_LICENSE = GPL-2.0

LINUX_LICENSE_FILES = COPYING

​

define LINUX_HELP_CMDS

    @echo '  linux-menuconfig       - Run Linux kernel menuconfig'

    @echo '  linux-savedefconfig    - Run Linux kernel savedefconfig'

    @echo '  linux-update-defconfig - Save the Linux configuration to the path specified'

    @echo '                             by BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE'

endef

​

# Compute LINUX_SOURCE and LINUX_SITE from the configuration

ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)

LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))

LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))

LINUX_SOURCE = $(notdir $(LINUX_TARBALL))

BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)

else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)

LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))

LINUX_SITE_METHOD = git

else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)

LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))

LINUX_SITE_METHOD = hg

else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN),y)

LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))

LINUX_SITE_METHOD = svn

else ifeq ($(BR2_LINUX_KERNEL_LATEST_CIP_VERSION),y)

LINUX_SITE = git://git.kernel.org/pub/scm/linux/kernel/git/bwh/linux-cip.git

else

LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz

ifeq ($(BR2_LINUX_KERNEL_CUSTOM_VERSION),y)

BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)

endif

# In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order

# to use the $(word) function. We support versions such as 4.0, 3.1,

# 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.

ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)

LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6

else ifeq ($(findstring x3.,x$(LINUX_VERSION)),x3.)

LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x

else ifeq ($(findstring x4.,x$(LINUX_VERSION)),x4.)

LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x

endif

# release candidates are in testing/ subdir

ifneq ($(findstring -rc,$(LINUX_VERSION)),)

LINUX_SITE := $(LINUX_SITE)/testing

endif # -rc

endif

​

LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))

​

# We rely on the generic package infrastructure to download and apply

# remote patches (downloaded from ftp, http or https). For local

# patches, we can't rely on that infrastructure, because there might

# be directories in the patch list (unlike for other packages).

LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))

​

LINUX_INSTALL_IMAGES = YES

LINUX_DEPENDENCIES += host-kmod

​

# host tools needed for kernel compression

ifeq ($(BR2_LINUX_KERNEL_LZ4),y)

LINUX_DEPENDENCIES += host-lz4

else ifeq ($(BR2_LINUX_KERNEL_LZMA),y)

LINUX_DEPENDENCIES += host-lzma

else ifeq ($(BR2_LINUX_KERNEL_LZO),y)

LINUX_DEPENDENCIES += host-lzop

else ifeq ($(BR2_LINUX_KERNEL_XZ),y)

LINUX_DEPENDENCIES += host-xz

endif

LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) = CONFIG_KERNEL_GZIP

LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) = CONFIG_KERNEL_LZ4

LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) = CONFIG_KERNEL_LZMA

LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) = CONFIG_KERNEL_LZO

LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) = CONFIG_KERNEL_XZ

​

# If host-uboot-tools is selected by the user, assume it is needed to

# create a custom image

ifeq ($(BR2_PACKAGE_HOST_UBOOT_TOOLS),y)

LINUX_DEPENDENCIES += host-uboot-tools

endif

​

LINUX_MAKE_FLAGS = \

    HOSTCC="$(HOSTCC)" \

    HOSTCFLAGS="$(HOSTCFLAGS)" \

    ARCH=$(KERNEL_ARCH) \