| #Android makefile to build kernel as a part of Android Build |
| PERL = perl |
| |
| KERNEL_TARGET := $(strip $(INSTALLED_KERNEL_TARGET)) |
| ifeq ($(KERNEL_TARGET),) |
| INSTALLED_KERNEL_TARGET := $(PRODUCT_OUT)/kernel |
| endif |
| |
| TARGET_KERNEL_MAKE_ENV := $(strip $(TARGET_KERNEL_MAKE_ENV)) |
| ifeq ($(TARGET_KERNEL_MAKE_ENV),) |
| KERNEL_MAKE_ENV := |
| else |
| KERNEL_MAKE_ENV := $(TARGET_KERNEL_MAKE_ENV) |
| endif |
| |
| TARGET_KERNEL_ARCH := $(strip $(TARGET_KERNEL_ARCH)) |
| ifeq ($(TARGET_KERNEL_ARCH),) |
| KERNEL_ARCH := arm |
| else |
| KERNEL_ARCH := $(TARGET_KERNEL_ARCH) |
| endif |
| |
| TARGET_KERNEL_HEADER_ARCH := $(strip $(TARGET_KERNEL_HEADER_ARCH)) |
| ifeq ($(TARGET_KERNEL_HEADER_ARCH),) |
| KERNEL_HEADER_ARCH := $(KERNEL_ARCH) |
| else |
| $(warning Forcing kernel header generation only for '$(TARGET_KERNEL_HEADER_ARCH)') |
| KERNEL_HEADER_ARCH := $(TARGET_KERNEL_HEADER_ARCH) |
| endif |
| |
| KERNEL_HEADER_DEFCONFIG := $(strip $(KERNEL_HEADER_DEFCONFIG)) |
| ifeq ($(KERNEL_HEADER_DEFCONFIG),) |
| KERNEL_HEADER_DEFCONFIG := $(KERNEL_DEFCONFIG) |
| endif |
| |
| # Force 32-bit binder IPC for 64bit kernel with 32bit userspace |
| ifeq ($(KERNEL_ARCH),arm64) |
| ifeq ($(TARGET_ARCH),arm) |
| KERNEL_CONFIG_OVERRIDE := CONFIG_ANDROID_BINDER_IPC_32BIT=y |
| endif |
| endif |
| |
| TARGET_KERNEL_CROSS_COMPILE_PREFIX := $(strip $(TARGET_KERNEL_CROSS_COMPILE_PREFIX)) |
| ifeq ($(TARGET_KERNEL_CROSS_COMPILE_PREFIX),) |
| KERNEL_CROSS_COMPILE := arm-eabi- |
| else |
| KERNEL_CROSS_COMPILE := $(shell pwd)/$(TARGET_TOOLS_PREFIX) |
| endif |
| |
| ifeq ($(KERNEL_LLVM_SUPPORT), true) |
| ifeq ($(KERNEL_SD_LLVM_SUPPORT), true) #Using sd-llvm compiler |
| ifeq ($(shell echo $(SDCLANG_PATH) | head -c 1),/) |
| KERNEL_LLVM_BIN := $(SDCLANG_PATH)/clang |
| else |
| KERNEL_LLVM_BIN := $(shell pwd)/$(SDCLANG_PATH)/clang |
| endif |
| $(warning "Using sdllvm" $(KERNEL_LLVM_BIN)) |
| else |
| KERNEL_LLVM_BIN := $(shell pwd)/$(CLANG) #Using aosp-llvm compiler |
| $(warning "Using aosp-llvm" $(KERNEL_LLVM_BIN)) |
| endif |
| endif |
| |
| ifeq ($(TARGET_PREBUILT_KERNEL),) |
| |
| KERNEL_GCC_NOANDROID_CHK := $(shell (echo "int main() {return 0;}" | $(KERNEL_CROSS_COMPILE)gcc -E -mno-android - > /dev/null 2>&1 ; echo $$?)) |
| |
| real_cc := |
| ifeq ($(KERNEL_LLVM_SUPPORT),true) |
| real_cc := REAL_CC=$(KERNEL_LLVM_BIN) CLANG_TRIPLE=aarch64-linux-gnu- |
| else |
| ifeq ($(strip $(KERNEL_GCC_NOANDROID_CHK)),0) |
| KERNEL_CFLAGS := KCFLAGS=-mno-android |
| endif |
| endif |
| |
| mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST))) |
| current_dir := $(notdir $(patsubst %/,%,$(dir $(mkfile_path)))) |
| TARGET_KERNEL := msm-$(TARGET_KERNEL_VERSION) |
| ifeq ($(TARGET_KERNEL),$(current_dir)) |
| # New style, kernel/msm-version |
| BUILD_ROOT_LOC := ../../ |
| TARGET_KERNEL_SOURCE := kernel/$(TARGET_KERNEL) |
| KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/kernel/$(TARGET_KERNEL) |
| KERNEL_SYMLINK := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ |
| KERNEL_USR := $(KERNEL_SYMLINK)/usr |
| else |
| # Legacy style, kernel source directly under kernel |
| KERNEL_LEGACY_DIR := true |
| BUILD_ROOT_LOC := ../ |
| TARGET_KERNEL_SOURCE := kernel |
| KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ |
| endif |
| |
| KERNEL_CONFIG := $(KERNEL_OUT)/.config |
| |
| ifeq ($(KERNEL_DEFCONFIG)$(wildcard $(KERNEL_CONFIG)),) |
| $(error Kernel configuration not defined, cannot build kernel) |
| else |
| |
| TARGET_USES_UNCOMPRESSED_KERNEL := $(shell grep "CONFIG_BUILD_ARM64_UNCOMPRESSED_KERNEL=y" $(TARGET_KERNEL_SOURCE)/arch/arm64/configs/$(KERNEL_DEFCONFIG)) |
| ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),) |
| ifeq ($(KERNEL_ARCH),arm64) |
| TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image.gz |
| else |
| TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/zImage |
| endif |
| else |
| $(info Using uncompressed kernel) |
| TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image |
| endif |
| |
| ifeq ($(TARGET_KERNEL_APPEND_DTB), true) |
| $(info Using appended DTB) |
| TARGET_PREBUILT_INT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)-dtb |
| endif |
| |
| KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr |
| KERNEL_MODULES_INSTALL ?= system |
| KERNEL_MODULES_OUT ?= $(PRODUCT_OUT)/$(KERNEL_MODULES_INSTALL)/lib/modules |
| |
| TARGET_PREBUILT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL) |
| |
| BOARD_VENDOR_KERNEL_MODULES += $(wildcard $(KERNEL_MODULES_OUT)/*.ko) |
| |
| define mv-modules |
| mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\ |
| if [ "$$mdpath" != "" ];then\ |
| mpath=`dirname $$mdpath`;\ |
| ko=`find $$mpath/kernel -type f -name *.ko`;\ |
| for i in $$ko; do mv $$i $(KERNEL_MODULES_OUT)/; done;\ |
| fi |
| endef |
| |
| define clean-module-folder |
| mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\ |
| if [ "$$mdpath" != "" ];then\ |
| mpath=`dirname $$mdpath`; rm -rf $$mpath;\ |
| fi |
| endef |
| |
| ifneq ($(KERNEL_LEGACY_DIR),true) |
| $(KERNEL_USR): $(KERNEL_HEADERS_INSTALL) |
| rm -rf $(KERNEL_SYMLINK) |
| ln -s kernel/$(TARGET_KERNEL) $(KERNEL_SYMLINK) |
| |
| $(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_USR) |
| endif |
| |
| $(KERNEL_OUT): |
| mkdir -p $(KERNEL_OUT) |
| |
| $(KERNEL_CONFIG): $(KERNEL_OUT) |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_DEFCONFIG) |
| $(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE)" ]; then \ |
| echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE)'"; \ |
| echo $(KERNEL_CONFIG_OVERRIDE) >> $(KERNEL_OUT)/.config; \ |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) oldconfig; fi |
| |
| $(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_OUT) $(KERNEL_HEADERS_INSTALL) |
| $(hide) echo "Building kernel..." |
| $(hide) rm -rf $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS) |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS) modules |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) INSTALL_MOD_PATH=$(BUILD_ROOT_LOC)../$(KERNEL_MODULES_INSTALL) INSTALL_MOD_STRIP=1 $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) modules_install |
| $(mv-modules) |
| $(clean-module-folder) |
| |
| $(KERNEL_HEADERS_INSTALL): $(KERNEL_OUT) |
| $(hide) if [ ! -z "$(KERNEL_HEADER_DEFCONFIG)" ]; then \ |
| rm -f $(BUILD_ROOT_LOC)$(KERNEL_CONFIG); \ |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_HEADER_DEFCONFIG); \ |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) headers_install;\ |
| if [ -d "$(KERNEL_HEADERS_INSTALL)/include/bringup_headers" ]; then \ |
| cp -Rf $(KERNEL_HEADERS_INSTALL)/include/bringup_headers/* $(KERNEL_HEADERS_INSTALL)/include/ ;\ |
| fi ;\ |
| fi |
| $(hide) if [ "$(KERNEL_HEADER_DEFCONFIG)" != "$(KERNEL_DEFCONFIG)" ]; then \ |
| echo "Used a different defconfig for header generation"; \ |
| rm -f $(BUILD_ROOT_LOC)$(KERNEL_CONFIG); \ |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_DEFCONFIG); fi |
| $(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE)" ]; then \ |
| echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE)'"; \ |
| echo $(KERNEL_CONFIG_OVERRIDE) >> $(KERNEL_OUT)/.config; \ |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) oldconfig; fi |
| |
| .PHONY: kerneltags |
| kerneltags: $(KERNEL_OUT) $(KERNEL_CONFIG) |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) tags |
| |
| .PHONY: kernelconfig |
| kernelconfig: $(KERNEL_OUT) $(KERNEL_CONFIG) |
| env KCONFIG_NOTIMESTAMP=true \ |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) menuconfig |
| env KCONFIG_NOTIMESTAMP=true \ |
| $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) savedefconfig |
| cp $(KERNEL_OUT)/defconfig $(TARGET_KERNEL_SOURCE)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_DEFCONFIG) |
| |
| endif |
| endif |