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kenv.mk
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# Copyright (C) 2017 MediaTek Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See http://www.gnu.org/licenses/gpl-2.0.html for more details.
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
define move-kernel-module-files
v=`cat $(2)/include/config/kernel.release`;\
for i in `grep -h '\.ko' /dev/null $(2)/.tmp_versions/*.mod`; do \
o=`basename $$i`;\
if [ -e $(1)/lib/modules/$$o ] && cmp -s $(1)/lib/modules/$$v/kernel/$$i $(1)/lib/modules/$$o; then \
echo $(1)/lib/modules/$$o has no change;\
else \
echo Update $(1)/lib/modules/$$o;\
mv -f $(1)/lib/modules/$$v/kernel/$$i $(1)/lib/modules/$$o;\
fi;\
done
endef
define clean-kernel-module-dirs
rm -rf $(1)/lib/modules/$(if $(2),`cat $(2)/include/config/kernel.release`,*/)
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 $(TARGET_KERNEL_USE_CLANG)),true)
CLANG_PATH=$(KERNEL_ROOT_DIR)/prebuilts/clang/host/linux-x86/clang-r353983c
TARGET_KERNEL_CLANG_COMPILE := CLANG_TRIPLE=aarch64-linux-gnu-
CC := $(CLANG_PATH)/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 := $(TARGET_KERNEL_CROSS_COMPILE)gcc
endif
ifeq ($(USE_CCACHE), true)
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
KERNEL_HOST_GCC_PREFIX := $(patsubst %strip,%,$(HOST_STRIP))
KERNEL_HOST_GCC_TOOLCHAIN := $(patsubst %/,%,$(dir $(patsubst %/,%,$(dir $(HOST_STRIP)))))
KERNEL_HOST_CLANG_FLAGS := --gcc-toolchain=$(KERNEL_ROOT_DIR)/$(KERNEL_HOST_GCC_TOOLCHAIN) --sysroot $(KERNEL_ROOT_DIR)/$(KERNEL_HOST_GCC_TOOLCHAIN)/sysroot $(patsubst -B%,-B$(KERNEL_ROOT_DIR)/%,$(filter -B%,$(SOONG_CLANG_HOST_GLOBAL_LDFLAGS))) $(patsubst -L%,-L$(KERNEL_ROOT_DIR)/%,$(filter -L%,$(SOONG_CLANG_HOST_GLOBAL_LDFLAGS)))
KERNEL_HOSTCC := "$(KERNEL_ROOT_DIR)/$(CLANG) $(KERNEL_HOST_CLANG_FLAGS)"
KERNEL_HOSTCXX := "$(KERNEL_ROOT_DIR)/$(CLANG_CXX) $(KERNEL_HOST_CLANG_FLAGS)"
ifeq ($(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
KERNEL_DTB_FILE := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/mtk.dtb
BUILT_KERNEL_TARGET := $(KERNEL_ZIMAGE_OUT).bin
INSTALLED_KERNEL_TARGET := $(PRODUCT_OUT)/kernel
INSTALLED_DTB_OVERLAY_TARGET := $(PRODUCT_OUT)/dtbo.img
BUILT_DTB_OVERLAY_TARGET := $(KERNEL_OUT)/arch/$(KERNEL_TARGET_ARCH)/boot/dts/dtbo.img
TARGET_KERNEL_CONFIG := $(KERNEL_OUT)/.config
KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
KERNEL_CONFIG_FILE := $(KERNEL_DIR)/arch/$(KERNEL_TARGET_ARCH)/configs/$(KERNEL_DEFCONFIG)
#KERNEL_CONFIG_MODULES := $(shell grep ^CONFIG_MODULES=y $(KERNEL_CONFIG_FILE))
#KERNEL_MODULES_OUT := $(if $(filter /% ~%,$(TARGET_OUT)),,$(KERNEL_ROOT_DIR)/)$(TARGET_OUT)
#KERNEL_MODULES_DEPS := $(if $(wildcard $(KERNEL_MODULES_OUT)/lib/modules/*.ko),$(wildcard $(KERNEL_MODULES_OUT)/lib/modules/*.ko),$(KERNEL_MODULES_OUT)/lib/modules)
#KERNEL_MODULES_SYMBOLS_OUT := $(if $(filter /% ~%,$(TARGET_OUT_UNSTRIPPED)),,$(KERNEL_ROOT_DIR)/)$(TARGET_OUT_UNSTRIPPED)/system
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)
ifdef MTK_DTBO_FEATURE
KERNEL_MAKE_OPTION += MTK_DTBO_FEATURE=$(MTK_DTBO_FEATURE)
endif
ifdef KERNEL_HOSTCC
KERNEL_MAKE_OPTION += HOSTCC=$(KERNEL_HOSTCC)
endif
ifdef KERNEL_HOSTCXX
KERNEL_MAKE_OPTION += HOSTCXX=$(KERNEL_HOSTCXX)
endif
ifeq ($(KERNEL_TARGET_ARCH),arm64)
ifeq ($(strip $(TARGET_KERNEL_USE_CLANG)),true)
# for CONFIG_LTO_CLANG to find clang llvm-dis & llvm-ar & LLVMgold.so
KERNEL_MAKE_OPTION += LD_LIBRARY_PATH=$(CLANG_PATH)/lib64:$$LD_LIBRARY_PATH
KERNEL_MAKE_OPTION += PATH=$(CLANG_PATH)/bin/:$$PATH
endif
endif
else
BUILT_KERNEL_TARGET := $(TARGET_PREBUILT_KERNEL)
endif#TARGET_PREBUILT_KERNEL is empty
endif#TARGET_NO_KERNEL