分析代码：################################################################################
#
#
Linux kernel target
#
################################################################################
LINUX_VERSION = $(call qstrip,$(BR2_
LINUX_KERNEL_VERSION))
LINUX_LICENSE = GPLv2
LINUX_LICENSE_FILES = COPYING
# 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_LOCAL),y)
LINUX_SITE = $(call qstrip,$(BR2_
LINUX_KERNEL_CUSTOM_LOCAL_PATH))
LINUX_SITE_METHOD = local
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
LINUX_SOURCE =
linux-$(
LINUX_VERSION).tar.xz
ifeq ($(BR2_
LINUX_KERNEL_CUSTOM_VERSION),y)
BR_NO_CHECK_HASH_FOR += $(
LINUX_SOURCE)
endif
ifeq ($(BR2_
LINUX_KERNEL_SAME_AS_HEADERS)$(BR2_KERNEL_HEADERS_VERSION),yy)
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 infra
structure to download and apply
# remote patches (downloaded from ftp, http or https). For local
# patches, we can't rely on that infra
structure, 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-lzop host-lzma
ifeq ($(BR2_
LINUX_KERNEL_UBOOT_IMAGE),y)
LINUX_DEPENDENCIES += host-uboot-tools
endif
LINUX_MAKE_FLAGS = \
HOSTCC="$(HOSTCC)" \
HOSTCFLAGS="$(HOSTCFLAGS)" \
ARCH=$(KERNEL_ARCH) \
INSTALL_MOD_PATH=$(TARGET_DIR) \
CROSS_COMPILE="$(TARGET_CROSS)" \
DEPMOD=$(HOST_DIR)/sbin/depmod
LINUX_MAKE_ENV = \
$(TARGET_MAKE_ENV) \
BR_BINARIES_DIR=$(BINARIES_DIR)
# Get the real
Linux version, which tells us where kernel modules are
# going to be installed in the target filesystem.
LINUX_VERSION_PROBED = `$(MAKE) $(
LINUX_MAKE_FLAGS) -C $(
LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
ifeq ($(BR2_
LINUX_KERNEL_USE_INTREE_DTS),y)
KERNEL_DTS_NAME = $(call qstrip,$(BR2_
LINUX_KERNEL_INTREE_DTS_NAME))
else ifeq ($(BR2_
LINUX_KERNEL_USE_CUSTOM_DTS),y)
# We keep only the .dts files, so that the user can specify both .dts
# and .dtsi files in BR2_
LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
# copied to arch/<arch>/boot/dts, but only the .dts files will
# actually be generated as .dtb.
KERNEL_DTS_NAME = $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_
LINUX_KERNEL_CUSTOM_DTS_PATH)))))
endif
KERNEL_DTBS = $(addsuffix .dtb,$(KERNEL_DTS_NAME))
ifeq ($(BR2_
LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
LINUX_IMAGE_NAME = $(call qstrip,$(BR2_
LINUX_KERNEL_IMAGE_NAME))
LINUX_TARGET_NAME = $(call qstrip,$(BR2_
LINUX_KERNEL_IMAGE_TARGET_NAME))
ifeq ($(
LINUX_IMAGE_NAME),)
LINUX_IMAGE_NAME = $(
LINUX_TARGET_NAME)
endif
else
ifeq ($(BR2_
LINUX_KERNEL_UIMAGE),y)
LINUX_IMAGE_NAME = uImage
else ifeq ($(BR2_
LINUX_KERNEL_APPENDED_UIMAGE),y)
LINUX_IMAGE_NAME = uImage
else ifeq ($(BR2_
LINUX_KERNEL_BZIMAGE),y)
LINUX_IMAGE_NAME = bzImage
else ifeq ($(BR2_
LINUX_KERNEL_ZIMAGE),y)
LINUX_IMAGE_NAME = zImage
else ifeq ($(BR2_
LINUX_KERNEL_ZIMAGE_EPAPR),y)
LINUX_IMAGE_NAME = zImage.epapr
else ifeq ($(BR2_
LINUX_KERNEL_APPENDED_ZIMAGE),y)
LINUX_IMAGE_NAME = zImage
else ifeq ($(BR2_
LINUX_KERNEL_CUIMAGE),y)
LINUX_IMAGE_NAME = cuImage.$(KERNEL_DTS_NAME)
else ifeq ($(BR2_
LINUX_KERNEL_SIMPLEIMAGE),y)
LINUX_IMAGE_NAME = simpleImage.$(KERNEL_DTS_NAME)
else ifeq ($(BR2_
LINUX_KERNEL_IMAGE),y)
LINUX_IMAGE_NAME = Image
else ifeq ($(BR2_
LINUX_KERNEL_
LINUX_BIN),y)
LINUX_IMAGE_NAME =
linux.bin
else ifeq ($(BR2_
LINUX_KERNEL_VM
LINUX_BIN),y)
LINUX_IMAGE_NAME = vm
linux.bin
else ifeq ($(BR2_
LINUX_KERNEL_VM
LINUX),y)
LINUX_IMAGE_NAME = vm
linux
else ifeq ($(BR2_
LINUX_KERNEL_VMLINUZ),y)
LINUX_IMAGE_NAME = vmlinuz
endif
# The if-else blocks above are all the image types we know of, and all
# come from a K
config choice, so we know we have
LINUX_IMAGE_NAME set
# to something
LINUX_TARGET_NAME = $(
LINUX_IMAGE_NAME)
endif
LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_
LINUX_KERNEL_UIMAGE_LOADADDR))
ifneq ($(
LINUX_KERNEL_UIMAGE_LOADADDR),)
LINUX_MAKE_FLAGS += LOADADDR="$(
LINUX_KERNEL_UIMAGE_LOADADDR)"
endif
# Compute the arch path, since i386 and x86_64 are in arch/x86 and not
# in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
# for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
# def
config file.
ifeq ($(KERNEL_ARCH),i386)
KERNEL_ARCH_PATH = $(
LINUX_DIR)/arch/x86
else ifeq ($(KERNEL_ARCH),x86_64)
KERNEL_ARCH_PATH = $(
LINUX_DIR)/arch/x86
else
KERNEL_ARCH_PATH = $(
LINUX_DIR)/arch/$(KERNEL_ARCH)
endif
ifeq ($(BR2_
LINUX_KERNEL_VM
LINUX),y)
LINUX_IMAGE_PATH = $(
LINUX_DIR)/$(
LINUX_IMAGE_NAME)
else ifeq ($(BR2_
LINUX_KERNEL_VMLINUZ),y)
LINUX_IMAGE_PATH = $(
LINUX_DIR)/$(
LINUX_IMAGE_NAME)
else
LINUX_IMAGE_PATH = $(KERNEL_ARCH_PATH)/boot/$(
LINUX_IMAGE_NAME)
endif # BR2_
LINUX_KERNEL_VM
LINUX
define
LINUX_APPLY_LOCAL_PATCHES
for p in $(filter-out ftp://% http://% https://%,$(
LINUX_PATCHES)) ; do \
if test -d $$p ; then \
$(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
else \
$(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
fi \
done
endef
LINUX_POST_PATCH_HOOKS +=
LINUX_APPLY_LOCAL_PATCHES
ifeq ($(BR2_
LINUX_KERNEL_USE_DEF
CONFIG),y)
KERNEL_SOURCE_
CONFIG = $(KERNEL_ARCH_PATH)/
configs/$(call qstrip,$(BR2_
LINUX_KERNEL_DEF
CONFIG))_def
config
else ifeq ($(BR2_
LINUX_KERNEL_USE_CUSTOM_
CONFIG),y)
KERNEL_SOURCE_
CONFIG = $(call qstrip,$(BR2_
LINUX_KERNEL_CUSTOM_
CONFIG_FILE))
endif
LINUX_K
CONFIG_FILE = $(KERNEL_SOURCE_
CONFIG)
LINUX_K
CONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_
LINUX_KERNEL_
CONFIG_FRAGMENT_FILES))
LINUX_K
CONFIG_EDITORS = menu
config x
config g
config n
config
LINUX_K
CONFIG_OPTS = $(
LINUX_MAKE_FLAGS)
define
LINUX_K
CONFIG_FIXUP_CMDS
$(if $(
LINUX_NEEDS_MODULES),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_MODULES,$(@D)/.
config))
$(if $(BR2_arm)$(BR2_armeb),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_
AEABI,$(@D)/.
config))
$(if $(BR2_TARGET_ROOTFS_CPIO),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_BLK_DEV_INITRD,$(@D)/.
config))
# As the kernel gets compiled before root filesystems are
# built, we create a fake cpio file. It'll be
# replaced later by the real cpio archive, and the kernel will be
# rebuilt using the
linux-rebuild-with-initramfs target.
$(if $(BR2_TARGET_ROOTFS_INITRAMFS),
touch $(BINARIES_DIR)/rootfs.cpio
$(call K
CONFIG_SET_OPT,
CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.
config)
$(call K
CONFIG_SET_OPT,
CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.
config)
$(call K
CONFIG_SET_OPT,
CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.
config))
$(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
$(call K
CONFIG_ENABLE_OPT,
CONFIG_DEVTMPFS,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_DEVTMPFS_MOUNT,$(@D)/.
config))
$(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_INOTIFY_USER,$(@D)/.
config))
$(if $(BR2_PACKAGE_KTAP),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_DEBUG_FS,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_PERF_EVENTS,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_FUNCTION_TRACER,$(@D)/.
config))
$(if $(BR2_PACKAGE_SYSTEMD),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_CGROUPS,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_INOTIFY_USER,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_FHANDLE,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_AUTOFS4_FS,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_TMPFS_POSIX_ACL,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_TMPFS_POSIX_XATTR,$(@D)/.
config))
$(if $(BR2_PACKAGE_SMACK),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_SECURITY,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_SECURITY_SMACK,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_SECURITY_NETWORK,$(@D)/.
config))
$(if $(BR2_PACKAGE_IPTABLES),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_IP_NF_IPTABLES,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_IP_NF_FILTER,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_NETFILTER,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_NETFILTER_XTABLES,$(@D)/.
config))
$(if $(BR2_PACKAGE_XTABLES_ADDONS),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_NETFILTER_ADVANCED,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_NF_CONNTRACK,$(@D)/.
config)
$(call K
CONFIG_ENABLE_OPT,
CONFIG_NF_CONNTRACK_MARK,$(@D)/.
config))
$(if $(BR2_
LINUX_KERNEL_APPENDED_DTB),
$(call K
CONFIG_ENABLE_OPT,
CONFIG_ARM_APPENDED_DTB,$(@D)/.
config))
endef
ifeq ($(BR2_
LINUX_KERNEL_DTS_SUPPORT),y)
ifeq ($(BR2_
LINUX_KERNEL_DTB_IS_SELF_BUILT),)
define
LINUX_BUILD_DTB
$(
LINUX_MAKE_ENV) $(MAKE) $(
LINUX_MAKE_FLAGS) -C $(@D) $(KERNEL_DTBS)
endef
define
LINUX_INSTALL_DTB
# dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
cp $(addprefix \
$(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
$(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
$(BINARIES_DIR)/
endef
define
LINUX_INSTALL_DTB_TARGET
# dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
cp $(addprefix \
$(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
$(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
$(TARGET_DIR)/boot/
endef
endif
endif
ifeq ($(BR2_
LINUX_KERNEL_APPENDED_DTB),y)
# dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
define
LINUX_APPEND_DTB
if [ -e $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb ]; then \
cat $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb; \
else \
cat $(KERNEL_ARCH_PATH)/boot/dts/$(KERNEL_DTS_NAME).dtb; \
fi >> $(KERNEL_ARCH_PATH)/boot/zImage
endef
ifeq ($(BR2_
LINUX_KERNEL_APPENDED_UIMAGE),y)
# We need to generate a new u-boot image that takes into
# account the extra-size added by the device tree at the end
# of the image. To do so, we first need to retrieve both load
# address and entry point for the kernel from the already
# generate uboot image before using mkimage -l.
LINUX_APPEND_DTB += $(sep) MKIMAGE_ARGS=`$(MKIMAGE) -l $(
LINUX_IMAGE_PATH) |\
sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
$(MKIMAGE) -A $(MKIMAGE_ARCH) -O
linux \
-T kernel -C none $${MKIMAGE_ARGS} \
-d $(KERNEL_ARCH_PATH)/boot/zImage $(
LINUX_IMAGE_PATH);
endif
endif
# Compilation. We make sure the kernel gets rebuilt when the
#
configuration has changed.
define
LINUX_BUILD_CMDS
$(if $(BR2_
LINUX_KERNEL_USE_CUSTOM_DTS),
cp $(call qstrip,$(BR2_
LINUX_KERNEL_CUSTOM_DTS_PATH)) $(KERNEL_ARCH_PATH)/boot/dts/)
$(
LINUX_MAKE_ENV) $(MAKE) $(
LINUX_MAKE_FLAGS) -C $(@D) $(
LINUX_TARGET_NAME)
@if grep -q "
CONFIG_MODULES=y" $(@D)/.
config; then \
$(
LINUX_MAKE_ENV) $(MAKE) $(
LINUX_MAKE_FLAGS) -C $(@D) modules ; \
fi
$(
LINUX_BUILD_DTB)
$(
LINUX_APPEND_DTB)
endef
ifeq ($(BR2_
LINUX_KERNEL_INSTALL_TARGET),y)
define
LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
install -m 0644 -D $(
LINUX_IMAGE_PATH) $(TARGET_DIR)/boot/$(
LINUX_IMAGE_NAME)
$(
LINUX_INSTALL_DTB_TARGET)
endef
endif
define
LINUX_INSTALL_HOST_TOOLS
# Installing dtc (device tree compiler) as host tool, if selected
if grep -q "
CONFIG_DTC=y" $(@D)/.
config; then \
$(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/usr/bin/
linux-dtc ; \
fi
endef
define
LINUX_INSTALL_IMAGES_CMDS
cp $(
LINUX_IMAGE_PATH) $(BINARIES_DIR)
$(
LINUX_INSTALL_DTB)
endef
define
LINUX_INSTALL_TARGET_CMDS
$(
LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
# Install modules and remove symbolic links pointing to build
# directories, not relevant on the target
@if grep -q "
CONFIG_MODULES=y" $(@D)/.
config; then \
$(
LINUX_MAKE_ENV) $(MAKE1) $(
LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
rm -f $(TARGET_DIR)/lib/modules/$(
LINUX_VERSION_PROBED)/build ; \
rm -f $(TARGET_DIR)/lib/modules/$(
LINUX_VERSION_PROBED)/source ; \
fi
$(
LINUX_INSTALL_HOST_TOOLS)
endef
# Include all our extensions and tools definitions.
#
# Note: our package infra
structure uses the full-path of the last-scanned
# Makefile to determine what package we're currently defining, using the
# last directory component in the path. As such, including other Makefile,
# like below, before we call one of the *-package macro is usally not
# working.
# However, since the files we include here are in the same directory as
# the current Makefile, we are OK. But this is a hard requirement: files
# included here *must* be in the same directory!
include $(sort $(wildcard
linux/
linux-ext-*.mk))
include $(sort $(wildcard
linux/
linux-tool-*.mk))
LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(
LINUX_EXTENSIONS),\
$(if $(BR2_
LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(
LINUX_EXTENSIONS),\
$(if $(BR2_
LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
$(call UPPERCASE,$(ext))_PREPARE_KERNEL))
# Install
Linux kernel tools in the staging directory since some tools
# may install shared libraries and headers (e.g. cpupower). The kernel
# image is NOT installed in the staging directory.
LINUX_INSTALL_STAGING = YES
LINUX_DEPENDENCIES += $(foreach tool,$(
LINUX_TOOLS),\
$(if $(BR2_
LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
$($(call UPPERCASE,$(tool))_DEPENDENCIES)))
LINUX_POST_BUILD_HOOKS += $(foreach tool,$(
LINUX_TOOLS),\
$(if $(BR2_
LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
$(call UPPERCASE,$(tool))_BUILD_CMDS))
LINUX_POST_INSTALL_STAGING_HOOKS += $(foreach tool,$(
LINUX_TOOLS),\
$(if $(BR2_
LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
$(call UPPERCASE,$(tool))_INSTALL_STAGING_CMDS))
LINUX_POST_INSTALL_TARGET_HOOKS += $(foreach tool,$(
LINUX_TOOLS),\
$(if $(BR2_
LINUX_KERNEL_TOOL_$(call UPPERCASE,$(tool))),\
$(call UPPERCASE,$(tool))_INSTALL_TARGET_CMDS))
# Checks to give errors that the user can understand
ifeq ($(BR_BUILDING),y)
ifeq ($(BR2_
LINUX_KERNEL_USE_DEF
CONFIG),y)
ifeq ($(call qstrip,$(BR2_
LINUX_KERNEL_DEF
CONFIG)),)
$(error No kernel def
config name specified, check your BR2_
LINUX_KERNEL_DEF
CONFIG setting)
endif
endif
ifeq ($(BR2_
LINUX_KERNEL_USE_CUSTOM_
CONFIG),y)
ifeq ($(call qstrip,$(BR2_
LINUX_KERNEL_CUSTOM_
CONFIG_FILE)),)
$(error No kernel
configuration file specified, check your BR2_
LINUX_KERNEL_CUSTOM_
CONFIG_FILE setting)
endif
endif
ifeq ($(BR2_
LINUX_KERNEL_DTS_SUPPORT)$(KERNEL_DTS_NAME),y)
$(error No kernel device tree source specified, check your \
BR2_
LINUX_KERNEL_USE_INTREE_DTS / BR2_
LINUX_KERNEL_USE_CUSTOM_DTS settings)
endif
ifeq ($(BR2_
LINUX_KERNEL_APPENDED_DTB),y)
ifneq ($(words $(KERNEL_DTS_NAME)),1)
$(error Kernel with appended device tree needs exactly one DTS source. \
Check BR2_
LINUX_KERNEL_INTREE_DTS_NAME or BR2_
LINUX_KERNEL_CUSTOM_DTS_PATH.)
endif
endif
endif # BR_BUILDING
$(eval $(k
config-package))
# Support for rebuilding the kernel after the cpio archive has
# been generated in $(BINARIES_DIR)/rootfs.cpio.
$(
LINUX_DIR)/.stamp_initramfs_rebuilt: $(
LINUX_DIR)/.stamp_target_installed $(
LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.cpio
@$(call MESSAGE,"Rebuilding kernel with initramfs")
# Build the kernel.
$(
LINUX_MAKE_ENV) $(MAKE) $(
LINUX_MAKE_FLAGS) -C $(@D) $(
LINUX_TARGET_NAME)
$(
LINUX_APPEND_DTB)
# Copy the kernel image to its final destination
cp $(
LINUX_IMAGE_PATH) $(BINARIES_DIR)
# If there is a .ub file copy it to the final destination
test ! -f $(
LINUX_IMAGE_PATH).ub || cp $(
LINUX_IMAGE_PATH).ub $(BINARIES_DIR)
$(Q)touch $@
# The initramfs building code must make sure this target gets called
# after it generated the initramfs list of files.
linux-rebuild-with-initramfs: $(
LINUX_DIR)/.stamp_initramfs_rebuilt
本文深入探讨了Linux内核中CONFIG_AEABI配置项的作用及其与用户空间环境的关系。重点分析了在内核加载过程中遇到的内核崩溃错误，以及该选项如何影响内核加载过程。通过详细解释，帮助开发者理解并解决由内核ABI配置不一致导致的问题。
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