105 lines
3.5 KiB
Makefile
Executable File
105 lines
3.5 KiB
Makefile
Executable File
#Android makefile to build kernel as a part of Android Build
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ifeq ($(KERNEL_DEFCONFIG),)
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$(error KERNEL_DEFCONFIG must be set as environment variable)
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endif
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ifeq ($(INSTALLED_KERNEL_TARGET),)
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INSTALLED_KERNEL_TARGET := $(PRODUCT_OUT)/kernel
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INSTALLED_DTBOIMAGE_TARGET := $(PRODUCT_OUT)/dtbo.img
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BOARD_PREBUILT_DTBOIMAGE := $(PRODUCT_OUT)/prebuilt_dtbo.img
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INSTALLED_DTB_TARGET := $(PRODUCT_OUT)/dtb.img
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endif
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TARGET_KERNEL_ARCH := $(strip $(TARGET_KERNEL_ARCH))
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ifeq ($(TARGET_KERNEL_ARCH),)
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KERNEL_ARCH := arm64
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else
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KERNEL_ARCH := $(TARGET_KERNEL_ARCH)
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endif
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ifeq ($(CROSS_COMPILE),)
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KERNEL_CROSS_COMPILE := aarch64-linux-android-
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else
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KERNEL_CROSS_COMPILE := $(CROSS_COMPILE)
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endif
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SOONG_GLOBAL_CONFIG := build/soong/cc/config/global.go
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CLANG_VERSION := $(shell grep "ClangDefaultVersion" $(SOONG_GLOBAL_CONFIG) | grep -o "clang-[0-9][0-9]*")
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CLANG_PATH := prebuilts/clang/host/linux-x86
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CC :=$(PWD)/$(CLANG_PATH)/$(CLANG_VERSION)/bin/clang
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ifeq ($(CLANG_TRIPLE),)
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CLANG_TRIPLE := aarch64-linux-gnu-
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else
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CLANG_TRIPLE := $(CLANG_TRIPLE)
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endif
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ifeq ($(TARGET_PREBUILT_KERNEL),)
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TARGET_KERNEL_SOURCE := kernel/$(TARGET_KERNEL)
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KERNEL_CONFIG := $(TARGET_KERNEL_SOURCE)/.config
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KERNEL_BOOT := $(TARGET_KERNEL_SOURCE)/arch/$(KERNEL_ARCH)/boot
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KERNEL_BIN := $(KERNEL_BOOT)/Image
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KERNEL_DTB_DIR := $(KERNEL_BOOT)/dts/exynos
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KERNEL_DTB := $(KERNEL_DTB_DIR)/exynos9610.dtb
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KERNEL_DTBO_CFG := $(KERNEL_DTB_DIR)/$(TARGET_SOC)_dtboimg.cfg
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MKDTIMG := $(HOST_OUT_EXECUTABLES)/mkdtimg
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KERNEL_MERGE_CONFIG := $(TARGET_KERNEL_SOURCE)/scripts/kconfig/merge_config.sh
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KERNEL_CONFIG_BASE := $(TARGET_KERNEL_SOURCE)/arch/$(KERNEL_ARCH)/configs
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KERNEL_DEFCONFIG_PATH := $(KERNEL_CONFIG_BASE)/$(KERNEL_DEFCONFIG)
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ifeq ($(KERNEL_DEFCONFIG),)
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$(error Kernel configuration not defined, cannot build kernel)
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else
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ifeq ($(TARGET_BUILD_VARIANT),eng)
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MAKE_CONFIG_CMD := $(MAKE) -C $(TARGET_KERNEL_SOURCE) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_DEFCONFIG)
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else
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ifeq ($(TARGET_BUILD_VARIANT),userdebug)
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KERNEL_USER_CFG := $(KERNEL_CONFIG_BASE)/$(TARGET_SOC)_userdebug.cfg
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else
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KERNEL_USER_CFG := $(KERNEL_CONFIG_BASE)/$(TARGET_SOC)_user.cfg
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endif
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MAKE_CONFIG_CMD := ARCH=$(KERNEL_ARCH) $(KERNEL_MERGE_CONFIG) -m -O $(TARGET_KERNEL_SOURCE) $(KERNEL_DEFCONFIG_PATH) $(KERNEL_USER_CFG);
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MAKE_CONFIG_CMD += $(MAKE) -C $(TARGET_KERNEL_SOURCE) ARCH=$(KERNEL_ARCH) KCONFIG_ALLCONFIG=.config alldefconfig
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endif
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ifeq ($(N_KERNEL_BUILD_THREAD),)
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N_KERNEL_BUILD_THREAD := 1
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endif
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TARGET_PREBUILT_KERNEL := $(KERNEL_BIN)
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.PHONY: phony-rebuild
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.PHONY: kernel
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kernel: $(KERNEL_BIN)
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.PHONY: kernel-distclean
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kernel-distclean:
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) distclean
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$(KERNEL_CONFIG): phony-rebuild
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$(hide) echo "make $(KERNEL_DEFCONFIG)"
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$(MAKE_CONFIG_CMD)
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$(KERNEL_BIN): $(KERNEL_CONFIG)
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$(hide) echo "Building kernel..."
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) CLANG_TRIPLE=$(CLANG_TRIPLE) CC=$(CC) -j$(N_KERNEL_BUILD_THREAD)
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# mkdtimg cfg_create exynos9610_dtbo.img arch/arm64/boot/dts/exynos/exynos9610_dtboimg.cfg
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$(INSTALLED_KERNEL_TARGET): $(INSTALLED_DTBOIMAGE_TARGET)
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cp $(KERNEL_BIN) $(INSTALLED_KERNEL_TARGET)
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cp $(KERNEL_DTB) $(INSTALLED_DTB_TARGET)
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$(BOARD_PREBUILT_DTBOIMAGE): $(MKDTIMG) $(KERNEL_DTBO_CFG) $(KERNEL_BIN)
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$(hide) echo "Building DTBOIMAGE..."
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ln -sf $(TARGET_KERNEL_SOURCE)/arch
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$(MKDTIMG) cfg_create $@ $(KERNEL_DTBO_CFG)
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rm -f arch
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endif #TARGET_PREBUILT_KERNEL
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endif #KERNEL_DEFCONFIG
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