编译android时自动将linux内核做build的kernel.mk脚本

在vendor/xxxxx/AndroidBoard.mk中追加如下一行
include $(LOCAL_PATH)/kernel.mk
然后将kernel.mk脚本放到该xxxxx目录下 kernel.mk.rar 

ifneq ($(TARGET_NO_KERNEL),true)

BOARD_KERNEL_BASE ?= 0x0
KERNEL_PATH ?= kernel
KERNEL_CPU  ?= at91rm9200dk
KERNEL_CONFIG ?= $(KERNEL_CPU)_defconfig
KERNEL_OUTPUT ?= $(shell pwd)/$(TARGET_OUT_INTERMEDIATES)/KERNEL#$(KERNEL_PATH)#$(HOME)/xxxxluther.gliethttpxxxxx

TARGET_OUT_INTERMEDIATES ?= out/target/luther.gliethttp.product/obj
HOST_PREBUILT_TAG ?= linux-x86
ifeq ($(strip $(CROSS_COMPILE)),)
KERNEL_CROSS_COMPILE_PATH = $(shell pwd)/prebuilt/$(HOST_PREBUILT_TAG)/toolchain/arm-eabi-4.4.0/bin/
KERNEL_CROSS_COMPILE := arm-eabi-
else
KERNEL_CROSS_COMPILE_PATH = ./
KERNEL_CROSS_COMPILE := $(CROSS_COMPILE)
endif
MAKE_JOBS ?= 8
TARGET_ARCH ?= arm

KERNEL_DOTCONFIG_DEP = $(KERNEL_PATH)/arch/$(TARGET_ARCH)/configs/$(KERNEL_CONFIG)
KERNEL_DOTCONFIG = $(KERNEL_OUTPUT)/.config
TARGET_PREBUILT_KERNEL = $(KERNEL_OUTPUT)/arch/$(TARGET_ARCH)/boot/Image

ifeq (,$(shell [ -f $(KERNEL_PATH)/init/main.c ] && echo 'y'))
define kernel-make
echo >/dev/null 2>&1
endef
else
#$(shell rm -f $(TARGET_PREBUILT_KERNEL) 2>&1 >/dev/null)
ifneq ($(KERNEL_OUTPUT),$(KERNEL_PATH))
define kernel-make
export PATH=$(KERNEL_CROSS_COMPILE_PATH):${PATH}; \
$(MAKE) -j$(MAKE_JOBS) -C $(KERNEL_PATH) \
    ARCH=$(TARGET_ARCH) \
    CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) \
    O=$(KERNEL_OUTPUT) \
    $(if $(SHOW_COMMANDS),V=1)
endef
else
define kernel-make
export PATH=$(KERNEL_CROSS_COMPILE_PATH):${PATH}; \
$(MAKE) -j$(MAKE_JOBS) -C $(KERNEL_PATH) \
    ARCH=$(TARGET_ARCH) \
    CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) \
    $(if $(SHOW_COMMANDS),V=1)
endef
endif
endif

$(TARGET_PREBUILT_KERNEL): KERNEL_EXIST $(KERNEL_DOTCONFIG)
    $(hide) $(kernel-make) zImage modules

$(KERNEL_DOTCONFIG): $(KERNEL_DOTCONFIG_DEP)
    @mkdir -p $(KERNEL_OUTPUT)
    @if [ ! -f $(KERNEL_OUTPUT)/.config ]; then \
        echo "creating kernel config -- $(KERNEL_CONFIG)"; \
        $(kernel-make) $(KERNEL_CONFIG); \
    else \
        echo ".config is ready"; \
    fi

KERNEL_EXIST:
    @if [ "$(KERNEL_PATH)" != "$(KERNEL_OUTPUT)" ] && \
        [ -f $(KERNEL_PATH)/.config  -o -d $(KERNEL_PATH)/include/config ]; then \
        echo "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; \
        echo; \
        echo "Force clean $(shell pwd)/$(KERNEL_PATH)"; \
        echo; \
        echo "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; \
        cd $(KERNEL_PATH); $(MAKE) -j$(MAKE_JOBS) mrproper; cd - 2>&1 >/dev/null; \
    fi

$(INSTALLED_KERNEL_TARGET): $(TARGET_PREBUILT_KERNEL) | $(ACP)
    # $(transform-prebuilt-to-target)
    $(copy-file-to-target)

kernel: $(INSTALLED_KERNEL_TARGET)

#ALL_PREBUILT += $(INSTALLED_KERNEL_TARGET)

endif