分析代码：################################################################################
#
#
Linux kernel target
#
################################################################################
LINUX_VERSI
ON = $(call qstrip,$(BR2_
LINUX_KERNEL_VERSI
ON))
LINUX_LICENSE = GPLv2
LINUX_LICENSE_FILES = COPYING
# Compute
LINUX_
SOURCE and
LINUX_SITE
from the c
onfigurati
on
ifeq ($(BR2_
LINUX_KERNEL_CUSTOM_TARBALL),y)
LINUX_TARBALL = $(call qstrip,$(BR2_
LINUX_KERNEL_CUSTOM_TARBALL_LOCATI
ON))
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-$(
LINUX_VERSI
ON).tar.xz
ifeq ($(BR2_
LINUX_KERNEL_CUSTOM_VERSI
ON),y)
BR_NO_CHECK_HASH_FOR += $(
LINUX_
SOURCE)
endif
ifeq ($(BR2_
LINUX_KERNEL_SAME_AS_HEADERS)$(BR2_KERNEL_HEADERS_VERSI
ON),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 $(word) functi
on. We support versi
ons such as 4.0, 3.1,
# 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
ifeq ($(findstring x2.6.,x$(
LINUX_VERSI
ON)),x2.6.)
LINUX_SITE = $(BR2_KERNEL_MIRROR)/
linux/kernel/v2.6
else ifeq ($(findstring x3.,x$(
LINUX_VERSI
ON)),x3.)
LINUX_SITE = $(BR2_KERNEL_MIRROR)/
linux/kernel/v3.x
else ifeq ($(findstring x4.,x$(
LINUX_VERSI
ON)),x4.)
LINUX_SITE = $(BR2_KERNEL_MIRROR)/
linux/kernel/v4.x
endif
# release candidates are in testing/ subdir
ifneq ($(findstring -rc,$(
LINUX_VERSI
ON)),)
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-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 versi
on, which tells us where kernel modules are
# going to be installed in the target filesystem.
LINUX_VERSI
ON_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 Kc
onfig 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/$(KERNEL_ARCH). Even if the kernel creates symbolic links
# for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
# defc
onfig file.
ifeq ($(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 \
d
one
endef
LINUX_POST_PATCH_HOOKS +=
LINUX_APPLY_LOCAL_PATCHES
ifeq ($(BR2_
LINUX_KERNEL_USE_DEFC
ONFIG),y)
KERNEL_
SOURCE_C
ONFIG = $(KERNEL_ARCH_PATH)/c
onfigs/$(call qstrip,$(BR2_
LINUX_KERNEL_DEFC
ONFIG))_defc
onfig
else ifeq ($(BR2_
LINUX_KERNEL_USE_CUSTOM_C
ONFIG),y)
KERNEL_
SOURCE_C
ONFIG = $(call qstrip,$(BR2_
LINUX_KERNEL_CUSTOM_C
ONFIG_FILE))
endif
LINUX_KC
ONFIG_FILE = $(KERNEL_
SOURCE_C
ONFIG)
LINUX_KC
ONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_
LINUX_KERNEL_C
ONFIG_FRAGMENT_FILES))
LINUX_KC
ONFIG_EDITORS = menuc
onfig xc
onfig gc
onfig nc
onfig
LINUX_KC
ONFIG_OPTS = $(
LINUX_MAKE_FLAGS)
define
LINUX_KC
ONFIG_FIXUP_CMDS
$(if $(
LINUX_NEEDS_MODULES),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_MODULES,$(@D)/.c
onfig))
$(if $(BR2_arm)$(BR2_armeb),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_AEABI,$(@D)/.c
onfig))
$(if $(BR2_TARGET_ROOTFS_CPIO),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_BLK_DEV_INITRD,$(@D)/.c
onfig))
# 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-re
build-with-initramfs target.
$(if $(BR2_TARGET_ROOTFS_INITRAMFS),
touch $(BINARIES_DIR)/rootfs.cpio
$(call KC
ONFIG_SET_OPT,C
ONFIG_INITRAMFS_
SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.c
onfig)
$(call KC
ONFIG_SET_OPT,C
ONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.c
onfig)
$(call KC
ONFIG_SET_OPT,C
ONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.c
onfig))
$(if $(BR2_ROOTFS_DEVICE_CREATI
ON_STATIC),,
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_DEVTMPFS,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_DEVTMPFS_MOUNT,$(@D)/.c
onfig))
$(if $(BR2_ROOTFS_DEVICE_CREATI
ON_DYNAMIC_EUDEV),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_INOTIFY_USER,$(@D)/.c
onfig))
$(if $(BR2_PACKAGE_KTAP),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_DEBUG_FS,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_ENABLE_DEFAULT_TRACERS,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_PERF_EVENTS,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_FUNCTI
ON_TRACER,$(@D)/.c
onfig))
$(if $(BR2_PACKAGE_SYSTEMD),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_CGROUPS,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_INOTIFY_USER,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_FHANDLE,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_AUTOFS4_FS,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_TMPFS_POSIX_ACL,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_TMPFS_POSIX_XATTR,$(@D)/.c
onfig))
$(if $(BR2_PACKAGE_SMACK),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_SECURITY,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_SECURITY_SMACK,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_SECURITY_NETWORK,$(@D)/.c
onfig))
$(if $(BR2_PACKAGE_IPTABLES),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_IP_NF_IPTABLES,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_IP_NF_FILTER,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_NETFILTER,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_NETFILTER_XTABLES,$(@D)/.c
onfig))
$(if $(BR2_PACKAGE_XTABLES_ADD
ONS),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_NETFILTER_ADVANCED,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_NF_C
ONNTRACK,$(@D)/.c
onfig)
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_NF_C
ONNTRACK_MARK,$(@D)/.c
onfig))
$(if $(BR2_
LINUX_KERNEL_APPENDED_DTB),
$(call KC
ONFIG_ENABLE_OPT,C
ONFIG_ARM_APPENDED_DTB,$(@D)/.c
onfig))
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 n
one $${MKIMAGE_ARGS} \
-d $(KERNEL_ARCH_PATH)/boot/zImage $(
LINUX_IMAGE_PATH);
endif
endif
# Compilati
on. We make sure the kernel gets rebuilt when the
# c
onfigurati
on 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 "C
ONFIG_MODULES=y" $(@D)/.c
onfig; 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 "C
ONFIG_DTC=y" $(@D)/.c
onfig; 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 "C
ONFIG_MODULES=y" $(@D)/.c
onfig; then \
$(
LINUX_MAKE_ENV) $(MAKE1) $(
LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
rm -f $(TARGET_DIR)/lib/modules/$(
LINUX_VERSI
ON_PROBED)/
build ; \
rm -f $(TARGET_DIR)/lib/modules/$(
LINUX_VERSI
ON_PROBED)/
source ; \
fi
$(
LINUX_INSTALL_HOST_TOOLS)
endef
# Include all our extensi
ons and tools definiti
ons.
#
# Note
: our package infrastructure uses the full-path of the last-scanned
# Makefile to determine what package we're currently defining, using the
# last directory comp
onent 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_EXTENSI
ONS),\
$(if $(BR2_
LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(
LINUX_EXTENSI
ONS),\
$(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_DEFC
ONFIG),y)
ifeq ($(call qstrip,$(BR2_
LINUX_KERNEL_DEFC
ONFIG)),)
$(error No kernel defc
onfig name specified, check your BR2_
LINUX_KERNEL_DEFC
ONFIG setting)
endif
endif
ifeq ($(BR2_
LINUX_KERNEL_USE_CUSTOM_C
ONFIG),y)
ifeq ($(call qstrip,$(BR2_
LINUX_KERNEL_CUSTOM_C
ONFIG_FILE)),)
$(error No kernel c
onfigurati
on file specified, check your BR2_
LINUX_KERNEL_CUSTOM_C
ONFIG_FILE setting)
endif
endif
ifeq ($(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 $(kc
onfig-package))
# Support for re
building 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,"Re
building 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 destinati
on
cp $(
LINUX_IMAGE_PATH) $(BINARIES_DIR)
# If there is a .ub file copy it to the final destinati
on
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-re
build-with-initramfs
: $(
LINUX_DIR)/.stamp_initramfs_rebuilt
本文档提供了在Linux环境下从源码安装Code::Blocks的详细步骤，包括所需依赖库的安装，如libwxgtk2.8-dev和libgtk2.0-dev等，并指导如何清理旧的构建文件。
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