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kenv.mk
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# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2019 MediaTek Inc.
KERNEL_ENV_PATH := $(call my-dir)
KERNEL_ROOT_DIR := $(PWD)
define touch-kernel-image-timestamp
if [ -e $(1) ] && [ -e $(2) ] && cmp -s $(1) $(2); then \
echo $(2) has no change;\
mv -f $(1) $(2);\
else \
rm -f $(1);\
fi
endef
# '\\' in command is wrongly replaced to '\\\\' in kernel/out/arch/arm/boot/compressed/.piggy.xzkern.cmd
define fixup-kernel-cmd-file
if [ -e $(1) ]; then cp $(1) $(1).bak; sed -e 's/\\\\\\\\/\\\\/g' < $(1).bak > $(1); rm -f $(1).bak; fi
endef
ifneq ($(strip $(TARGET_NO_KERNEL)),true)
KERNEL_DIR := $(KERNEL_ENV_PATH)
ifeq ($(KERNEL_TARGET_ARCH),arm64)
TARGET_KERNEL_CROSS_COMPILE ?= $(KERNEL_ROOT_DIR)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-
TARGET_KERNEL_CLANG_COMPILE :=
CC := $(TARGET_KERNEL_CROSS_COMPILE)gcc
ifeq ($(strip $(TARGET_KERNEL_USE_CLANG)),true)
TARGET_KERNEL_CLANG_COMPILE := CLANG_TRIPLE=aarch64-linux-gnu-
CC := $(KERNEL_ROOT_DIR)/prebuilts/clang/host/linux-x86/clang-r353983c/bin/clang
endif
else
TARGET_KERNEL_CROSS_COMPILE ?= $(KERNEL_ROOT_DIR)/prebuilts/gcc/$(HOST_PREBUILT_TAG)/arm/arm-linux-androideabi-4.9/bin/arm-linux-androidkernel-
TARGET_KERNEL_CLANG_COMPILE :=
CC := $(TARGET_KERNEL_CROSS_COMPILE)gcc
endif
ifneq ($(filter-out false,$(USE_CCACHE)),)
CCACHE_EXEC ?= /usr/bin/ccache
CCACHE_EXEC := $(abspath $(wildcard $(CCACHE_EXEC)))
else
CCACHE_EXEC :=
endif
ifneq ($(CCACHE_EXEC),)
TARGET_KERNEL_CLANG_COMPILE += CCACHE_CPP2=yes CC='$(CCACHE_EXEC) $(CC)'
else
TARGET_KERNEL_CLANG_COMPILE += CC=$(CC)
endif
ifeq ($(wildcard $(TARGET_PREBUILT_KERNEL)),)
KERNEL_OUT ?= $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
KERNEL_ROOT_OUT := $(if $(filter /% ~%,$(KERNEL_OUT)),,$(KERNEL_ROOT_DIR)/)$(KERNEL_OUT)
ifeq ($(KERNEL_TARGET_ARCH), arm64)
ifeq ($(MTK_APPENDED_DTB_SUPPORT), yes)
KERNEL_ZIMAGE_OUT := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/Image.gz-dtb
else
KERNEL_ZIMAGE_OUT := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/Image.gz
endif
else
ifeq ($(MTK_APPENDED_DTB_SUPPORT), yes)
KERNEL_ZIMAGE_OUT := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/zImage-dtb
else
KERNEL_ZIMAGE_OUT := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/zImage
endif
endif
BUILT_KERNEL_TARGET := $(KERNEL_ZIMAGE_OUT).bin
INSTALLED_KERNEL_TARGET := $(PRODUCT_OUT)/kernel
TARGET_KERNEL_CONFIG := $(KERNEL_OUT)/.config
KERNEL_CONFIG_FILE := $(KERNEL_DIR)/arch/$(KERNEL_TARGET_ARCH)/configs/$(KERNEL_DEFCONFIG)
KERNEL_MAKE_OPTION := O=$(KERNEL_ROOT_OUT) ARCH=$(KERNEL_TARGET_ARCH) CROSS_COMPILE=$(TARGET_KERNEL_CROSS_COMPILE) $(TARGET_KERNEL_CLANG_COMPILE) ROOTDIR=$(KERNEL_ROOT_DIR)
KERNEL_MAKE_OPTION += HOSTCC=/usr/bin/gcc HOSTCXX=/usr/bin/g++
IMAGE_GZ_PATH := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/Image.gz
ifeq ($(MTK_APPEND_DTB),)
MTK_APPEND_DTB_PATH :=
else
MTK_APPEND_DTB_PATH := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/dts/mediatek/$(MTK_APPEND_DTB)
endif
MTK_IMAGE_GZ_DTB_PATH := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/Image.gz-dtb
else
BUILT_KERNEL_TARGET := $(TARGET_PREBUILT_KERNEL)
endif #TARGET_PREBUILT_KERNEL is empty
endif #TARGET_NO_KERNEL