core/tasks/kernel.mk - BrokenOs/android_build - Gitiles

 # Copyright (C) 2012 The CyanogenMod Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.

 # Android makefile to build kernel as a part of Android Build

 TARGET_AUTO_KDIR := $(shell echo $(TARGET_DEVICE_DIR) | sed -e 's/^device/kernel/g')

 ## Externally influenced variables
 # kernel location - optional, defaults to kernel/<vendor>/<device>
 TARGET_KERNEL_SOURCE ?= $(TARGET_AUTO_KDIR)
 KERNEL_SRC := $(TARGET_KERNEL_SOURCE)
 # kernel configuration - mandatory
 KERNEL_DEFCONFIG := $(TARGET_KERNEL_CONFIG)
 VARIANT_DEFCONFIG := $(TARGET_KERNEL_VARIANT_CONFIG)
 SELINUX_DEFCONFIG := $(TARGET_KERNEL_SELINUX_CONFIG)

 ## Internal variables
 KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
 KERNEL_CONFIG := $(KERNEL_OUT)/.config

 ifneq ($(BOARD_KERNEL_IMAGE_NAME),)
 	TARGET_PREBUILT_INT_KERNEL_TYPE := $(BOARD_KERNEL_IMAGE_NAME)
 	TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(TARGET_ARCH)/boot/$(TARGET_PREBUILT_INT_KERNEL_TYPE)
 else
 	TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(TARGET_ARCH)/boot/zImage
 	TARGET_PREBUILT_INT_KERNEL_TYPE := zImage
 endif

 ## Do be discontinued in a future version. Notify builder about target
 ## kernel format requirement
 ifeq ($(BOARD_KERNEL_IMAGE_NAME),)
 ifeq ($(BOARD_USES_UBOOT),true)
         $(error "Please set BOARD_KERNEL_IMAGE_NAME to uImage")
 else ifeq ($(BOARD_USES_UNCOMPRESSED_BOOT),true)
         $(error "Please set BOARD_KERNEL_IMAGE_NAME to Image")
 endif
 endif

 ifeq "$(wildcard $(KERNEL_SRC) )" ""
     ifneq ($(TARGET_PREBUILT_KERNEL),)
         HAS_PREBUILT_KERNEL := true
         NEEDS_KERNEL_COPY := true
     else
         $(foreach cf,$(PRODUCT_COPY_FILES), \
             $(eval _src := $(call word-colon,1,$(cf))) \
             $(eval _dest := $(call word-colon,2,$(cf))) \
             $(ifeq kernel,$(_dest), \
                 $(eval HAS_PREBUILT_KERNEL := true)))
     endif

     ifneq ($(HAS_PREBUILT_KERNEL),)
         $(warning ***************************************************************)
         $(warning * Using prebuilt kernel binary instead of source              *)
         $(warning * THIS IS DEPRECATED, AND WILL BE DISCONTINUED                *)
         $(warning * Please configure your device to download the kernel         *)
         $(warning * source repository to $(KERNEL_SRC))
         $(warning * See http://wiki.cyanogenmod.org/w/Doc:_integrated_kernel_building)
         $(warning * for more information                                        *)
         $(warning ***************************************************************)
         FULL_KERNEL_BUILD := false
         KERNEL_BIN := $(TARGET_PREBUILT_KERNEL)
     else
         $(warning ***************************************************************)
         $(warning *                                                             *)
         $(warning * No kernel source found, and no fallback prebuilt defined.   *)
         $(warning * Please make sure your device is properly configured to      *)
         $(warning * download the kernel repository to $(KERNEL_SRC))
         $(warning * and add the TARGET_KERNEL_CONFIG variable to BoardConfig.mk *)
         $(warning *                                                             *)
         $(warning * As an alternative, define the TARGET_PREBUILT_KERNEL        *)
         $(warning * variable with the path to the prebuilt binary kernel image  *)
         $(warning * in your BoardConfig.mk file                                 *)
         $(warning *                                                             *)
         $(warning ***************************************************************)
         $(error "NO KERNEL")
     endif
 else
     NEEDS_KERNEL_COPY := true
     ifeq ($(TARGET_KERNEL_CONFIG),)
         $(warning **********************************************************)
         $(warning * Kernel source found, but no configuration was defined  *)
         $(warning * Please add the TARGET_KERNEL_CONFIG variable to your   *)
         $(warning * BoardConfig.mk file                                    *)
         $(warning **********************************************************)
         # $(error "NO KERNEL CONFIG")
     else
         #$(info Kernel source found, building it)
         FULL_KERNEL_BUILD := true
         ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true)
         $(info Using uncompressed kernel)
             KERNEL_BIN := $(KERNEL_OUT)/piggy
         else
             KERNEL_BIN := $(TARGET_PREBUILT_INT_KERNEL)
         endif
     endif
 endif

 ifeq ($(TARGET_KERNEL_CUSTOM_RAMDISK),true)
     $(shell sed -i "s;CONFIG_INITRAMFS_SOURCE=\"\.\.;CONFIG_INITRAMFS_SOURCE=\"source/\.\.;" $(KERNEL_PATH))
 endif

 ifeq ($(FULL_KERNEL_BUILD),true)

 KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
 KERNEL_MODULES_INSTALL := system
 KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules

 define mv-modules
     mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.order`;\
     if [ "$$mdpath" != "" ];then\
         mpath=`dirname $$mdpath`;\
         ko=`find $$mpath/kernel -type f -name *.ko`;\
         for i in $$ko; do $(ARM_EABI_TOOLCHAIN)/arm-eabi-strip --strip-unneeded $$i;\
         mv $$i $(KERNEL_MODULES_OUT)/; done;\
     fi
 endef

 define clean-module-folder
     mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.order`;\
     if [ "$$mdpath" != "" ];then\
         mpath=`dirname $$mdpath`; rm -rf $$mpath;\
     fi
 endef

 ifeq ($(TARGET_ARCH),arm)
     ifneq ($(USE_CCACHE),)
       ccache := $(ANDROID_BUILD_TOP)/prebuilts/misc/$(HOST_PREBUILT_TAG)/ccache/ccache
       # Check that the executable is here.
       ccache := $(strip $(wildcard $(ccache)))
     endif
     ifneq ($(TARGET_GCC_VERSION_ARM),)
       ifeq ($(HOST_OS),darwin)
         ARM_CROSS_COMPILE:=CROSS_COMPILE="$(ccache) $(ANDROID_BUILD_TOP)/prebuilts/gcc/darwin-x86/arm/arm-eabi-$(TARGET_GCC_VERSION_ARM)/bin/arm-eabi-"
       else
         ARM_CROSS_COMPILE:=CROSS_COMPILE="$(ccache) $(ANDROID_BUILD_TOP)/prebuilts/gcc/linux-x86/arm/arm-eabi-$(TARGET_GCC_VERSION_ARM)/bin/arm-eabi-"
       endif
     else
       ARM_CROSS_COMPILE:=CROSS_COMPILE="$(ccache) $(ARM_EABI_TOOLCHAIN)/arm-eabi-"
     endif
     ccache =
 endif

 ifeq ($(HOST_OS),darwin)
   MAKE_FLAGS := C_INCLUDE_PATH=$(ANDROID_BUILD_TOP)/external/elfutils/libelf
 endif

 ifeq ($(TARGET_KERNEL_MODULES),)
     TARGET_KERNEL_MODULES := no-external-modules
 endif

 $(KERNEL_OUT):
 	mkdir -p $(KERNEL_OUT)
 	mkdir -p $(KERNEL_MODULES_OUT)

 $(KERNEL_CONFIG): $(KERNEL_OUT)
 	$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) $(KERNEL_DEFCONFIG)

 $(KERNEL_OUT)/piggy : $(TARGET_PREBUILT_INT_KERNEL)
 	$(hide) gunzip -c $(KERNEL_OUT)/arch/$(TARGET_ARCH)/boot/compressed/piggy.gzip > $(KERNEL_OUT)/piggy

 TARGET_KERNEL_BINARIES: $(KERNEL_OUT) $(KERNEL_CONFIG) $(KERNEL_HEADERS_INSTALL)
 	$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) $(TARGET_PREBUILT_INT_KERNEL_TYPE)
 	-$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) dtbs
 	-$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) modules
 	-$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) INSTALL_MOD_PATH=../../$(KERNEL_MODULES_INSTALL) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) modules_install
 	$(mv-modules)
 	$(clean-module-folder)

 $(TARGET_KERNEL_MODULES): TARGET_KERNEL_BINARIES

 $(TARGET_PREBUILT_INT_KERNEL): $(TARGET_KERNEL_MODULES)
 	$(mv-modules)
 	$(clean-module-folder)

 $(KERNEL_HEADERS_INSTALL): $(KERNEL_OUT) $(KERNEL_CONFIG)
 	$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) headers_install

 endif # FULL_KERNEL_BUILD

 ## Install it

 ifeq ($(NEEDS_KERNEL_COPY),true)
 file := $(INSTALLED_KERNEL_TARGET)
 ALL_PREBUILT += $(file)
 $(file) : $(KERNEL_BIN) | $(ACP)
 	$(transform-prebuilt-to-target)

 ALL_PREBUILT += $(INSTALLED_KERNEL_TARGET)
 endif
	# Copyright (C) 2012 The CyanogenMod Project
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	# Android makefile to build kernel as a part of Android Build

	TARGET_AUTO_KDIR := $(shell echo $(TARGET_DEVICE_DIR) \| sed -e 's/^device/kernel/g')

	## Externally influenced variables
	# kernel location - optional, defaults to kernel/<vendor>/<device>
	TARGET_KERNEL_SOURCE ?= $(TARGET_AUTO_KDIR)
	KERNEL_SRC := $(TARGET_KERNEL_SOURCE)
	# kernel configuration - mandatory
	KERNEL_DEFCONFIG := $(TARGET_KERNEL_CONFIG)
	VARIANT_DEFCONFIG := $(TARGET_KERNEL_VARIANT_CONFIG)
	SELINUX_DEFCONFIG := $(TARGET_KERNEL_SELINUX_CONFIG)

	## Internal variables
	KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
	KERNEL_CONFIG := $(KERNEL_OUT)/.config

	ifneq ($(BOARD_KERNEL_IMAGE_NAME),)
	TARGET_PREBUILT_INT_KERNEL_TYPE := $(BOARD_KERNEL_IMAGE_NAME)
	TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(TARGET_ARCH)/boot/$(TARGET_PREBUILT_INT_KERNEL_TYPE)
	else
	TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(TARGET_ARCH)/boot/zImage
	TARGET_PREBUILT_INT_KERNEL_TYPE := zImage
	endif

	## Do be discontinued in a future version. Notify builder about target
	## kernel format requirement
	ifeq ($(BOARD_KERNEL_IMAGE_NAME),)
	ifeq ($(BOARD_USES_UBOOT),true)
	$(error "Please set BOARD_KERNEL_IMAGE_NAME to uImage")
	else ifeq ($(BOARD_USES_UNCOMPRESSED_BOOT),true)
	$(error "Please set BOARD_KERNEL_IMAGE_NAME to Image")
	endif
	endif

	ifeq "$(wildcard $(KERNEL_SRC) )" ""
	ifneq ($(TARGET_PREBUILT_KERNEL),)
	HAS_PREBUILT_KERNEL := true
	NEEDS_KERNEL_COPY := true
	else
	$(foreach cf,$(PRODUCT_COPY_FILES), \
	$(eval _src := $(call word-colon,1,$(cf))) \
	$(eval _dest := $(call word-colon,2,$(cf))) \
	$(ifeq kernel,$(_dest), \
	$(eval HAS_PREBUILT_KERNEL := true)))
	endif

	ifneq ($(HAS_PREBUILT_KERNEL),)
	$(warning ***************************************************************)
	$(warning * Using prebuilt kernel binary instead of source *)
	$(warning * THIS IS DEPRECATED, AND WILL BE DISCONTINUED *)
	$(warning * Please configure your device to download the kernel *)
	$(warning * source repository to $(KERNEL_SRC))
	$(warning * See http://wiki.cyanogenmod.org/w/Doc:_integrated_kernel_building)
	$(warning * for more information *)
	$(warning ***************************************************************)
	FULL_KERNEL_BUILD := false
	KERNEL_BIN := $(TARGET_PREBUILT_KERNEL)
	else
	$(warning ***************************************************************)
	$(warning * *)
	$(warning * No kernel source found, and no fallback prebuilt defined. *)
	$(warning * Please make sure your device is properly configured to *)
	$(warning * download the kernel repository to $(KERNEL_SRC))
	$(warning * and add the TARGET_KERNEL_CONFIG variable to BoardConfig.mk *)
	$(warning * *)
	$(warning * As an alternative, define the TARGET_PREBUILT_KERNEL *)
	$(warning * variable with the path to the prebuilt binary kernel image *)
	$(warning * in your BoardConfig.mk file *)
	$(warning * *)
	$(warning ***************************************************************)
	$(error "NO KERNEL")
	endif
	else
	NEEDS_KERNEL_COPY := true
	ifeq ($(TARGET_KERNEL_CONFIG),)
	$(warning **********************************************************)
	$(warning * Kernel source found, but no configuration was defined *)
	$(warning * Please add the TARGET_KERNEL_CONFIG variable to your *)
	$(warning * BoardConfig.mk file *)
	$(warning **********************************************************)
	# $(error "NO KERNEL CONFIG")
	else
	#$(info Kernel source found, building it)
	FULL_KERNEL_BUILD := true
	ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true)
	$(info Using uncompressed kernel)
	KERNEL_BIN := $(KERNEL_OUT)/piggy
	else
	KERNEL_BIN := $(TARGET_PREBUILT_INT_KERNEL)
	endif
	endif
	endif

	ifeq ($(TARGET_KERNEL_CUSTOM_RAMDISK),true)
	$(shell sed -i "s;CONFIG_INITRAMFS_SOURCE=\"\.\.;CONFIG_INITRAMFS_SOURCE=\"source/\.\.;" $(KERNEL_PATH))
	endif

	ifeq ($(FULL_KERNEL_BUILD),true)

	KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
	KERNEL_MODULES_INSTALL := system
	KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules

	define mv-modules
	mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.order`;\
	if [ "$$mdpath" != "" ];then\
	mpath=`dirname $$mdpath`;\
	ko=`find $$mpath/kernel -type f -name *.ko`;\
	for i in $$ko; do $(ARM_EABI_TOOLCHAIN)/arm-eabi-strip --strip-unneeded $$i;\
	mv $$i $(KERNEL_MODULES_OUT)/; done;\
	fi
	endef

	define clean-module-folder
	mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.order`;\
	if [ "$$mdpath" != "" ];then\
	mpath=`dirname $$mdpath`; rm -rf $$mpath;\
	fi
	endef

	ifeq ($(TARGET_ARCH),arm)
	ifneq ($(USE_CCACHE),)
	ccache := $(ANDROID_BUILD_TOP)/prebuilts/misc/$(HOST_PREBUILT_TAG)/ccache/ccache
	# Check that the executable is here.
	ccache := $(strip $(wildcard $(ccache)))
	endif
	ifneq ($(TARGET_GCC_VERSION_ARM),)
	ifeq ($(HOST_OS),darwin)
	ARM_CROSS_COMPILE:=CROSS_COMPILE="$(ccache) $(ANDROID_BUILD_TOP)/prebuilts/gcc/darwin-x86/arm/arm-eabi-$(TARGET_GCC_VERSION_ARM)/bin/arm-eabi-"
	else
	ARM_CROSS_COMPILE:=CROSS_COMPILE="$(ccache) $(ANDROID_BUILD_TOP)/prebuilts/gcc/linux-x86/arm/arm-eabi-$(TARGET_GCC_VERSION_ARM)/bin/arm-eabi-"
	endif
	else
	ARM_CROSS_COMPILE:=CROSS_COMPILE="$(ccache) $(ARM_EABI_TOOLCHAIN)/arm-eabi-"
	endif
	ccache =
	endif

	ifeq ($(HOST_OS),darwin)
	MAKE_FLAGS := C_INCLUDE_PATH=$(ANDROID_BUILD_TOP)/external/elfutils/libelf
	endif

	ifeq ($(TARGET_KERNEL_MODULES),)
	TARGET_KERNEL_MODULES := no-external-modules
	endif

	$(KERNEL_OUT):
	mkdir -p $(KERNEL_OUT)
	mkdir -p $(KERNEL_MODULES_OUT)

	$(KERNEL_CONFIG): $(KERNEL_OUT)
	$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) $(KERNEL_DEFCONFIG)

	$(KERNEL_OUT)/piggy : $(TARGET_PREBUILT_INT_KERNEL)
	$(hide) gunzip -c $(KERNEL_OUT)/arch/$(TARGET_ARCH)/boot/compressed/piggy.gzip > $(KERNEL_OUT)/piggy

	TARGET_KERNEL_BINARIES: $(KERNEL_OUT) $(KERNEL_CONFIG) $(KERNEL_HEADERS_INSTALL)
	$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) $(TARGET_PREBUILT_INT_KERNEL_TYPE)
	-$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) dtbs
	-$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) modules
	-$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) INSTALL_MOD_PATH=../../$(KERNEL_MODULES_INSTALL) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) modules_install
	$(mv-modules)
	$(clean-module-folder)

	$(TARGET_KERNEL_MODULES): TARGET_KERNEL_BINARIES

	$(TARGET_PREBUILT_INT_KERNEL): $(TARGET_KERNEL_MODULES)
	$(mv-modules)
	$(clean-module-folder)

	$(KERNEL_HEADERS_INSTALL): $(KERNEL_OUT) $(KERNEL_CONFIG)
	$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(TARGET_ARCH) $(ARM_CROSS_COMPILE) headers_install

	endif # FULL_KERNEL_BUILD

	## Install it

	ifeq ($(NEEDS_KERNEL_COPY),true)
	file := $(INSTALLED_KERNEL_TARGET)
	ALL_PREBUILT += $(file)
	$(file) : $(KERNEL_BIN) \| $(ACP)
	$(transform-prebuilt-to-target)

	ALL_PREBUILT += $(INSTALLED_KERNEL_TARGET)
	endif