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build.sh
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build.sh
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#!/bin/bash
# Copyright (C) 2019 The Android Open Source 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.
# Usage:
# build/build.sh <make options>*
# or:
# To define custom out and dist directories:
# OUT_DIR=<out dir> DIST_DIR=<dist dir> build/build.sh <make options>*
# To use a custom build config:
# BUILD_CONFIG=<path to the build.config> <make options>*
#
# Examples:
# To define custom out and dist directories:
# OUT_DIR=output DIST_DIR=dist build/build.sh -j24 V=1
# To use a custom build config:
# BUILD_CONFIG=common/build.config.gki.aarch64 build/build.sh -j24 V=1
#
# The following environment variables are considered during execution:
#
# BUILD_CONFIG
# Build config file to initialize the build environment from. The location
# is to be defined relative to the repo root directory.
# Defaults to 'build.config'.
#
# BUILD_CONFIG_FRAGMENTS
# A whitespace-separated list of additional build config fragments to be
# sourced after the main build config file. Typically used for sanitizers or
# other special builds.
#
# FAST_BUILD
# If defined, trade run-time optimizations for build speed. In other words,
# if given a choice between a faster build and a run-time optimization,
# choose the shorter build time. For example, use ThinLTO for faster
# linking and reduce the lz4 compression level to speed up ramdisk
# compression. This trade-off is desirable for incremental kernel
# development where fast turnaround times are critical for productivity.
#
# OUT_DIR
# Base output directory for the kernel build.
# Defaults to <REPO_ROOT>/out/<BRANCH>.
#
# DIST_DIR
# Base output directory for the kernel distribution.
# Defaults to <OUT_DIR>/dist
#
# MAKE_GOALS
# List of targets passed to Make when compiling the kernel.
# Typically: Image, modules, and a DTB (if applicable).
#
# EXT_MODULES
# Space separated list of external kernel modules to be build.
#
# EXT_MODULES_MAKEFILE
# Location of a makefile to build external modules. If set, it will get
# called with all the necessary parameters to build and install external
# modules. This allows for building them in parallel using makefile
# parallelization.
#
# KCONFIG_EXT_PREFIX
# Path prefix relative to either ROOT_DIR or KERNEL_DIR that points to
# a directory containing an external Kconfig file named Kconfig.ext. When
# set, kbuild will source ${KCONFIG_EXT_PREFIX}Kconfig.ext which can be
# used to set configs for external modules in the defconfig.
#
# UNSTRIPPED_MODULES
# Space separated list of modules to be copied to <DIST_DIR>/unstripped
# for debugging purposes.
#
# COMPRESS_UNSTRIPPED_MODULES
# If set to "1", then compress the unstripped modules into a tarball.
#
# COMPRESS_MODULES
# If set to "1", then compress all modules into a tarball. The default
# is without defining COMPRESS_MODULES.
#
# LD
# Override linker (flags) to be used.
#
# HERMETIC_TOOLCHAIN
# When set, the PATH during kernel build will be restricted to a set of
# known prebuilt directories and selected host tools that are usually not
# provided by prebuilt toolchains.
#
# ADDITIONAL_HOST_TOOLS
# A whitespace separated set of tools that will be allowed to be used from
# the host when running the build with HERMETIC_TOOLCHAIN=1.
#
# ABI_DEFINITION
# Location of the abi definition file relative to <REPO_ROOT>/KERNEL_DIR
# If defined (usually in build.config), also copy that abi definition to
# <OUT_DIR>/dist/abi.xml when creating the distribution.
#
# KMI_SYMBOL_LIST
# Location of the main KMI symbol list file relative to
# <REPO_ROOT>/KERNEL_DIR If defined (usually in build.config), also copy
# that symbol list definition to <OUT_DIR>/dist/abi_symbollist when
# creating the distribution.
#
# ADDITIONAL_KMI_SYMBOL_LISTS
# Location of secondary KMI symbol list files relative to
# <REPO_ROOT>/KERNEL_DIR. If defined, these additional symbol lists will be
# appended to the main one before proceeding to the distribution creation.
#
# KMI_ENFORCED
# This is an indicative option to signal that KMI is enforced in this build
# config. If set to "1", downstream KMI checking tools might respect it and
# react to it by failing if KMI differences are detected.
#
# GENERATE_VMLINUX_BTF
# If set to "1", generate a vmlinux.btf that is stripped of any debug
# symbols, but contains type and symbol information within a .BTF section.
# This is suitable for ABI analysis through BTF.
#
# Environment variables to influence the stages of the kernel build.
#
# SKIP_MRPROPER
# if set to "1", skip `make mrproper`
#
# SKIP_DEFCONFIG
# if set to "1", skip `make defconfig`
#
# SKIP_IF_VERSION_MATCHES
# if defined, skip compiling anything if the kernel version in vmlinux
# matches the expected kernel version. This is useful for mixed build, where
# GKI kernel does not change frequently and we can simply skip everything
# in build.sh. Note: if the expected version string contains "dirty", then
# this flag would have not cause build.sh to exit early.
#
# PRE_DEFCONFIG_CMDS
# Command evaluated before `make defconfig`
#
# POST_DEFCONFIG_CMDS
# Command evaluated after `make defconfig` and before `make`.
#
# POST_KERNEL_BUILD_CMDS
# Command evaluated after `make`.
#
# LTO=[full|thin|none]
# If set to "full", force any kernel with LTO_CLANG support to be built
# with full LTO, which is the most optimized method. This is the default,
# but can result in very slow build times, especially when building
# incrementally. (This mode does not require CFI to be disabled.)
# If set to "thin", force any kernel with LTO_CLANG support to be built
# with ThinLTO, which trades off some optimizations for incremental build
# speed. This is nearly always what you want for local development. (This
# mode does not require CFI to be disabled.)
# If set to "none", force any kernel with LTO_CLANG support to be built
# without any LTO (upstream default), which results in no optimizations
# and also disables LTO-dependent features like CFI. This mode is not
# recommended because CFI will not be able to catch bugs if it is
# disabled.
#
# TAGS_CONFIG
# if defined, calls ./scripts/tags.sh utility with TAGS_CONFIG as argument
# and exit once tags have been generated
#
# IN_KERNEL_MODULES
# if defined, install kernel modules
#
# SKIP_EXT_MODULES
# if defined, skip building and installing of external modules
#
# DO_NOT_STRIP_MODULES
# if set to "1", keep debug information for distributed modules.
# Note, modules will still be stripped when copied into the ramdisk.
#
# EXTRA_CMDS
# Command evaluated after building and installing kernel and modules.
#
# DIST_CMDS
# Command evaluated after copying files to DIST_DIR
#
# SKIP_CP_KERNEL_HDR
# if defined, skip installing kernel headers.
#
# BUILD_BOOT_IMG
# if defined, build a boot.img binary that can be flashed into the 'boot'
# partition of an Android device. The boot image contains a header as per the
# format defined by https://source.android.com/devices/bootloader/boot-image-header
# followed by several components like kernel, ramdisk, DTB etc. The ramdisk
# component comprises of a GKI ramdisk cpio archive concatenated with a
# vendor ramdisk cpio archive which is then gzipped. It is expected that
# all components are present in ${DIST_DIR}.
#
# When the BUILD_BOOT_IMG flag is defined, the following flags that point to the
# various components needed to build a boot.img also need to be defined.
# - MKBOOTIMG_PATH=<path to the mkbootimg.py script which builds boot.img>
# (defaults to tools/mkbootimg/mkbootimg.py)
# - GKI_RAMDISK_PREBUILT_BINARY=<Name of the GKI ramdisk prebuilt which includes
# the generic ramdisk components like init and the non-device-specific rc files>
# - VENDOR_RAMDISK_BINARY=<Space separated list of vendor ramdisk binaries
# which includes the device-specific components of ramdisk like the fstab
# file and the device-specific rc files. If specifying multiple vendor ramdisks
# and identical file paths exist in the ramdisks, the file from last ramdisk is used.>
# - KERNEL_BINARY=<name of kernel binary, eg. Image.lz4, Image.gz etc>
# - BOOT_IMAGE_HEADER_VERSION=<version of the boot image header>
# (defaults to 3)
# - BOOT_IMAGE_FILENAME=<name of the output file>
# (defaults to "boot.img")
# - KERNEL_CMDLINE=<string of kernel parameters for boot>
# - KERNEL_VENDOR_CMDLINE=<string of kernel parameters for vendor boot image,
# vendor_boot when BOOT_IMAGE_HEADER_VERSION >= 3; boot otherwise>
# - VENDOR_FSTAB=<Path to the vendor fstab to be included in the vendor
# ramdisk>
# - TAGS_OFFSET=<physical address for kernel tags>
# - RAMDISK_OFFSET=<ramdisk physical load address>
# If the BOOT_IMAGE_HEADER_VERSION is less than 3, two additional variables must
# be defined:
# - BASE_ADDRESS=<base address to load the kernel at>
# - PAGE_SIZE=<flash page size>
# If BOOT_IMAGE_HEADER_VERSION >= 3, a vendor_boot image will be built
# unless SKIP_VENDOR_BOOT is defined. A vendor_boot will also be generated if
# BUILD_VENDOR_BOOT_IMG is set.
#
# BUILD_VENDOR_BOOT_IMG is incompatible with SKIP_VENDOR_BOOT, and is effectively a
# nop if BUILD_BOOT_IMG is set.
# - MODULES_LIST=<file to list of modules> list of modules to use for
# vendor_boot.modules.load. If this property is not set, then the default
# modules.load is used.
# - TRIM_UNUSED_MODULES. If set, then modules not mentioned in
# modules.load are removed from initramfs. If MODULES_LIST is unset, then
# having this variable set effectively becomes a no-op.
# - MODULES_BLOCKLIST=<modules.blocklist file> A list of modules which are
# blocked from being loaded. This file is copied directly to staging directory,
# and should be in the format:
# blocklist module_name
# - MKBOOTIMG_EXTRA_ARGS=<space-delimited mkbootimg arguments>
# Refer to: ./mkbootimg.py --help
# If BOOT_IMAGE_HEADER_VERSION >= 4, the following variable can be defined:
# - VENDOR_BOOTCONFIG=<string of bootconfig parameters>
# - INITRAMFS_VENDOR_RAMDISK_FRAGMENT_NAME=<name of the ramdisk fragment>
# If BUILD_INITRAMFS is specified, then build the .ko and depmod files as
# a standalone vendor ramdisk fragment named as the given string.
# - INITRAMFS_VENDOR_RAMDISK_FRAGMENT_MKBOOTIMG_ARGS=<mkbootimg arguments>
# Refer to: https://source.android.com/devices/bootloader/partitions/vendor-boot-partitions#mkbootimg-arguments
#
# VENDOR_RAMDISK_CMDS
# When building vendor boot image, VENDOR_RAMDISK_CMDS enables the build
# config file to specify command(s) for further altering the prebuilt vendor
# ramdisk binary. For example, the build config file could add firmware files
# on the vendor ramdisk (lib/firmware) for testing purposes.
#
# SKIP_UNPACKING_RAMDISK
# If set, skip unpacking the vendor ramdisk and copy it as is, without
# modifications, into the boot image. Also skip the mkbootfs step.
#
# AVB_SIGN_BOOT_IMG
# if defined, sign the boot image using the AVB_BOOT_KEY. Refer to
# https://android.googlesource.com/platform/external/avb/+/master/README.md
# for details on what Android Verified Boot is and how it works. The kernel
# prebuilt tool `avbtool` is used for signing.
#
# When AVB_SIGN_BOOT_IMG is defined, the following flags need to be
# defined:
# - AVB_BOOT_PARTITION_SIZE=<size of the boot partition in bytes>
# - AVB_BOOT_KEY=<absolute path to the key used for signing> The Android test
# key has been uploaded to the kernel/prebuilts/build-tools project here:
# https://android.googlesource.com/kernel/prebuilts/build-tools/+/refs/heads/master/linux-x86/share/avb
# - AVB_BOOT_ALGORITHM=<AVB_BOOT_KEY algorithm used> e.g. SHA256_RSA2048. For the
# full list of supported algorithms, refer to the enum AvbAlgorithmType in
# https://android.googlesource.com/platform/external/avb/+/refs/heads/master/libavb/avb_crypto.h
# - AVB_BOOT_PARTITION_NAME=<name of the boot partition>
# (defaults to BOOT_IMAGE_FILENAME without extension; by default, "boot")
#
# BUILD_INITRAMFS
# if set to "1", build a ramdisk containing all .ko files and resulting
# depmod artifacts
#
# BUILD_SYSTEM_DLKM
# if set to "1", build a system_dlkm.img containing all signed GKI modules
# and resulting depmod artifacts. GKI build exclusive; DO NOT USE with device
# build configs files.
#
# SYSTEM_DLKM_MODULES_LIST
# location (relative to the repo root directory) of an optional file
# containing the list of kernel modules which shall be copied into a
# system_dlkm partition image.
#
# MODULES_OPTIONS
# A /lib/modules/modules.options file is created on the ramdisk containing
# the contents of this variable, lines should be of the form: options
# <modulename> <param1>=<val> <param2>=<val> ...
#
# MODULES_ORDER
# location of an optional file containing the list of modules that are
# expected to be built for the current configuration, in the modules.order
# format, relative to the kernel source tree.
#
# GKI_MODULES_LIST
# location of an optional file containing the list of GKI modules, relative
# to the kernel source tree. This should be set in downstream builds to
# ensure the ABI tooling correctly differentiates vendor/OEM modules and GKI
# modules. This should not be set in the upstream GKI build.config.
#
# VENDOR_DLKM_MODULES_LIST
# location (relative to the repo root directory) of an optional file
# containing the list of kernel modules which shall be copied into a
# vendor_dlkm partition image. Any modules passed into MODULES_LIST which
# become part of the vendor_boot.modules.load will be trimmed from the
# vendor_dlkm.modules.load.
#
# VENDOR_DLKM_MODULES_BLOCKLIST
# location (relative to the repo root directory) of an optional file
# containing a list of modules which are blocked from being loaded. This
# file is copied directly to the staging directory and should be in the
# format: blocklist module_name
#
# VENDOR_DLKM_PROPS
# location (relative to the repo root directory) of a text file containing
# the properties to be used for creation of a vendor_dlkm image
# (filesystem, partition size, etc). If this is not set (and
# VENDOR_DLKM_MODULES_LIST is), a default set of properties will be used
# which assumes an ext4 filesystem and a dynamic partition.
#
# LZ4_RAMDISK
# if set to "1", any ramdisks generated will be lz4 compressed instead of
# gzip compressed.
#
# LZ4_RAMDISK_COMPRESS_ARGS
# Command line arguments passed to lz4 command to control compression
# level (defaults to "-12 --favor-decSpeed"). For iterative kernel
# development where faster compression is more desirable than a high
# compression ratio, it can be useful to control the compression ratio.
#
# TRIM_NONLISTED_KMI
# if set to "1", enable the CONFIG_UNUSED_KSYMS_WHITELIST kernel config
# option to un-export from the build any un-used and non-symbol-listed
# (as per KMI_SYMBOL_LIST) symbol.
#
# KMI_SYMBOL_LIST_STRICT_MODE
# if set to "1", add a build-time check between the KMI_SYMBOL_LIST and the
# KMI resulting from the build, to ensure they match 1-1.
#
# KMI_STRICT_MODE_OBJECTS
# optional list of objects to consider for the KMI_SYMBOL_LIST_STRICT_MODE
# check. Defaults to 'vmlinux'.
#
# GKI_DIST_DIR
# optional directory from which to copy GKI artifacts into DIST_DIR
#
# GKI_BUILD_CONFIG
# If set, builds a second set of kernel images using GKI_BUILD_CONFIG to
# perform a "mixed build." Mixed builds creates "GKI kernel" and "vendor
# modules" from two different trees. The GKI kernel tree can be the Android
# Common Kernel and the vendor modules tree can be a complete vendor kernel
# tree. GKI_DIST_DIR (above) is set and the GKI kernel's DIST output is
# copied to this DIST output. This allows a vendor tree kernel image to be
# effectively discarded and a GKI kernel Image used from an Android Common
# Kernel. Any variables prefixed with GKI_ are passed into into the GKI
# kernel's build.sh invocation.
#
# This is incompatible with GKI_PREBUILTS_DIR.
#
# GKI_PREBUILTS_DIR
# If set, copies an existing set of GKI kernel binaries to the DIST_DIR to
# perform a "mixed build," as with GKI_BUILD_CONFIG. This allows you to
# skip the additional compilation, if interested.
#
# This is incompatible with GKI_BUILD_CONFIG.
#
# The following must be present:
# vmlinux
# System.map
# vmlinux.symvers
# modules.builtin
# modules.builtin.modinfo
# Image.lz4
#
# BUILD_DTBO_IMG
# if defined, package a dtbo.img using the provided *.dtbo files. The image
# will be created under the DIST_DIR.
#
# The following flags control how the dtbo image is packaged.
# MKDTIMG_DTBOS=<list of *.dtbo files> used to package the dtbo.img. The
# *.dtbo files should be compiled by kbuild via the "make dtbs" command or
# by adding each *.dtbo to the MAKE_GOALS.
# MKDTIMG_FLAGS=<list of flags> to be passed to mkdtimg.
#
# DTS_EXT_DIR
# Set this variable to compile an out-of-tree device tree. The value of
# this variable is set to the kbuild variable "dtstree" which is used to
# compile the device tree, it will be used to lookup files in FILES as well.
# If this is set, then it's likely the dt-bindings are out-of-tree as well.
# So be sure to set DTC_INCLUDE in the BUILD_CONFIG file to the include path
# containing the dt-bindings.
#
# Update the MAKE_GOALS variable and the FILES variable to specify
# the target dtb files with the path under ${DTS_EXT_DIR}, so that they
# could be compiled and copied to the dist directory. Like the following:
# DTS_EXT_DIR=common-modules/virtual-device
# MAKE_GOALS="${MAKE_GOALS} k3399-rock-pi-4b.dtb"
# FILES="${FILES} rk3399-rock-pi-4b.dtb"
# where the dts file path is
# common-modules/virtual-device/rk3399-rock-pi-4b.dts
#
# BUILD_VENDOR_KERNEL_BOOT
# if set to "1", build a vendor_kernel_boot for kernel artifacts, such as kernel modules.
# Since we design this partition to isolate kernel artifacts from vendor_boot image,
# vendor_boot would not be repack and built if we set this property to "1".
#
# BUILD_GKI_CERTIFICATION_TOOLS
# if set to "1", build a gki_certification_tools.tar.gz, which contains
# the utilities used to certify GKI boot-*.img files.
#
# BUILD_GKI_ARTIFACTS
# if defined when $ARCH is arm64, build a boot-img.tar.gz archive that
# contains several GKI boot-*.img files with different kernel compression
# format. Each boot image contains a boot header v4 as per the format
# defined by https://source.android.com/devices/bootloader/boot-image-header
# , followed by a kernel (no ramdisk). The kernel binaries are from
# ${DIST_DIR}, e.g., Image, Image.gz, Image.lz4, etc. Individual
# boot-*.img files are also generated, e.g., boot.img, boot-gz.img and
# boot-lz4.img. It is expected that all components are present in
# ${DIST_DIR}.
#
# if defined when $ARCH is x86_64, build a boot.img with the kernel image,
# bzImage under ${DIST_DIR}. Additionally, create an archive boot-img.tar.gz
# containing boot.img.
#
# if defined when $ARCH is neither arm64 nor x86_64, print an error message
# then exist the build process.
#
# When the BUILD_GKI_ARTIFACTS flag is defined, the following flags also
# need to be defined.
# - MKBOOTIMG_PATH=<path to the mkbootimg.py script which builds boot.img>
# (defaults to tools/mkbootimg/mkbootimg.py)
# - BUILD_GKI_BOOT_IMG_SIZE=<The size of the boot.img to build>
# This is required, and the file ${DIST_DIR}/Image must exist.
# - BUILD_GKI_BOOT_IMG_GZ_SIZE=<The size of the boot-gz.img to build>
# This is required only when ${DIST_DIR}/Image.gz is present.
# - BUILD_GKI_BOOT_IMG_LZ4_SIZE=<The size of the boot-lz4.img to build>
# This is required only when ${DIST_DIR}/Image.lz4 is present.
# - BUILD_GKI_BOOT_IMG_<COMPRESSION>_SIZE=<The size of the
# boot-${compression}.img to build> This is required
# only when ${DIST_DIR}/Image.${compression} is present.
# Note: For historic reasons, internally, OUT_DIR will be copied into
# COMMON_OUT_DIR, and OUT_DIR will be then set to
# ${COMMON_OUT_DIR}/${KERNEL_DIR}. This has been done to accommodate existing
# build.config files that expect ${OUT_DIR} to point to the output directory of
# the kernel build.
#
# The kernel is built in ${COMMON_OUT_DIR}/${KERNEL_DIR}.
# Out-of-tree modules are built in ${COMMON_OUT_DIR}/${EXT_MOD} where
# ${EXT_MOD} is the path to the module source code.
set -e
# Save environment for mixed build support.
OLD_ENVIRONMENT=$(mktemp)
export -p > ${OLD_ENVIRONMENT}
export ROOT_DIR=$($(dirname $(readlink -f $0))/gettop.sh)
source "${ROOT_DIR}/build/build_utils.sh"
source "${ROOT_DIR}/build/_setup_env.sh"
(
[[ "$KLEAF_SUPPRESS_BUILD_SH_DEPRECATION_WARNING" == "1" ]] && exit 0 || true
echo "Inferring equivalent Bazel command..."
bazel_command_code=0
eq_bazel_command=$(
${ROOT_DIR}/build/kernel/kleaf/convert_to_bazel.sh # error messages goes to stderr
) || bazel_command_code=$?
echo "*****************************************************************************" >&2
echo "* WARNING: build.sh is deprecated for this branch. Please migrate to Bazel. " >&2
echo "* See build/kernel/kleaf/README.md " >&2
if [[ $bazel_command_code -eq 0 ]]; then
echo "* Possibly equivalent Bazel command: " >&2
echo "*" >&2
echo "* \$ $eq_bazel_command" >&2
echo "*" >&2
else
echo "WARNING: Unable to infer an equivalent Bazel command. " >&2
fi
echo "* To suppress this warning, set KLEAF_SUPPRESS_BUILD_SH_DEPRECATION_WARNING=1" >&2
echo "*****************************************************************************" >&2
echo >&2
)
# Suppress deprecation warning for recursive build.sh invocation with GKI_BUILD_CONFIG
export KLEAF_SUPPRESS_BUILD_SH_DEPRECATION_WARNING=1
MAKE_ARGS=( "$@" )
export MAKEFLAGS="-j$(nproc) ${MAKEFLAGS}"
export MODULES_STAGING_DIR=$(readlink -m ${COMMON_OUT_DIR}/staging)
export MODULES_PRIVATE_DIR=$(readlink -m ${COMMON_OUT_DIR}/private)
export KERNEL_UAPI_HEADERS_DIR=$(readlink -m ${COMMON_OUT_DIR}/kernel_uapi_headers)
export INITRAMFS_STAGING_DIR=${MODULES_STAGING_DIR}/initramfs_staging
export SYSTEM_DLKM_STAGING_DIR=${MODULES_STAGING_DIR}/system_dlkm_staging
export VENDOR_DLKM_STAGING_DIR=${MODULES_STAGING_DIR}/vendor_dlkm_staging
export MKBOOTIMG_STAGING_DIR="${MODULES_STAGING_DIR}/mkbootimg_staging"
if [ -n "${SKIP_VENDOR_BOOT}" -a -n "${BUILD_VENDOR_BOOT_IMG}" ]; then
echo "ERROR: SKIP_VENDOR_BOOT is incompatible with BUILD_VENDOR_BOOT_IMG." >&2
exit 1
fi
if [ -n "${GKI_BUILD_CONFIG}" ]; then
if [ -n "${GKI_PREBUILTS_DIR}" ]; then
echo "ERROR: GKI_BUILD_CONFIG is incompatible with GKI_PREBUILTS_DIR." >&2
exit 1
fi
GKI_OUT_DIR=${GKI_OUT_DIR:-${COMMON_OUT_DIR}/gki_kernel}
GKI_DIST_DIR=${GKI_DIST_DIR:-${GKI_OUT_DIR}/dist}
if [[ "${MAKE_GOALS}" =~ image|Image|vmlinux ]]; then
echo " Compiling Image and vmlinux in device kernel is not supported in mixed build mode"
exit 1
fi
# Inherit SKIP_MRPROPER, LTO, SKIP_DEFCONFIG unless overridden by corresponding GKI_* variables
GKI_ENVIRON=("SKIP_MRPROPER=${SKIP_MRPROPER}" "LTO=${LTO}" "SKIP_DEFCONFIG=${SKIP_DEFCONFIG}" "SKIP_IF_VERSION_MATCHES=${SKIP_IF_VERSION_MATCHES}")
# Explicitly unset EXT_MODULES since they should be compiled against the device kernel
GKI_ENVIRON+=("EXT_MODULES=")
# Explicitly unset GKI_BUILD_CONFIG in case it was set by in the old environment
# e.g. GKI_BUILD_CONFIG=common/build.config.gki.x86 ./build/build.sh would cause
# gki build recursively
GKI_ENVIRON+=("GKI_BUILD_CONFIG=")
# Explicitly unset KCONFIG_EXT_PREFIX in case it was set by the older environment.
GKI_ENVIRON+=("KCONFIG_EXT_PREFIX=")
# Any variables prefixed with GKI_ get set without that prefix in the GKI build environment
# e.g. GKI_BUILD_CONFIG=common/build.config.gki.aarch64 -> BUILD_CONFIG=common/build.config.gki.aarch64
GKI_ENVIRON+=($(export -p | sed -n -E -e 's/.* GKI_([^=]+=.*)$/\1/p' | tr '\n' ' '))
GKI_ENVIRON+=("OUT_DIR=${GKI_OUT_DIR}")
GKI_ENVIRON+=("DIST_DIR=${GKI_DIST_DIR}")
( env -i bash -c "source ${OLD_ENVIRONMENT}; rm -f ${OLD_ENVIRONMENT}; export ${GKI_ENVIRON[*]} ; ./build/build.sh $*" ) || exit 1
# Dist dir must have vmlinux.symvers, modules.builtin.modinfo, modules.builtin
MAKE_ARGS+=("KBUILD_MIXED_TREE=$(readlink -m ${GKI_DIST_DIR})")
else
rm -f ${OLD_ENVIRONMENT}
fi
if [ -n "${KCONFIG_EXT_PREFIX}" ]; then
# Since this is a prefix, make sure it ends with "/"
if [[ ! "${KCONFIG_EXT_PREFIX}" =~ \/$ ]]; then
KCONFIG_EXT_PREFIX=${KCONFIG_EXT_PREFIX}/
fi
# KCONFIG_EXT_PREFIX needs to be relative to KERNEL_DIR but we allow one to set
# it relative to ROOT_DIR for ease of use. So figure out what was used.
if [ -f "${ROOT_DIR}/${KCONFIG_EXT_PREFIX}Kconfig.ext" ]; then
# KCONFIG_EXT_PREFIX is currently relative to ROOT_DIR. So recalculate it to be
# relative to KERNEL_DIR
KCONFIG_EXT_PREFIX=$(rel_path ${ROOT_DIR}/${KCONFIG_EXT_PREFIX} ${KERNEL_DIR})
elif [ ! -f "${KERNEL_DIR}/${KCONFIG_EXT_PREFIX}Kconfig.ext" ]; then
echo "Couldn't find the Kconfig.ext in ${KCONFIG_EXT_PREFIX}" >&2
exit 1
fi
# Since this is a prefix, make sure it ends with "/"
if [[ ! "${KCONFIG_EXT_PREFIX}" =~ \/$ ]]; then
KCONFIG_EXT_PREFIX=${KCONFIG_EXT_PREFIX}/
fi
MAKE_ARGS+=("KCONFIG_EXT_PREFIX=${KCONFIG_EXT_PREFIX}")
fi
if [ -n "${DTS_EXT_DIR}" ]; then
if [[ "${MAKE_GOALS}" =~ dtbs|\.dtb|\.dtbo ]]; then
# DTS_EXT_DIR needs to be relative to KERNEL_DIR but we allow one to set
# it relative to ROOT_DIR for ease of use. So figure out what was used.
if [ -d "${ROOT_DIR}/${DTS_EXT_DIR}" ]; then
# DTS_EXT_DIR is currently relative to ROOT_DIR. So recalcuate it to be
# relative to KERNEL_DIR
DTS_EXT_DIR=$(rel_path ${ROOT_DIR}/${DTS_EXT_DIR} ${KERNEL_DIR})
elif [ ! -d "${KERNEL_DIR}/${DTS_EXT_DIR}" ]; then
echo "Couldn't find the dtstree -- ${DTS_EXT_DIR}" >&2
exit 1
fi
MAKE_ARGS+=("dtstree=${DTS_EXT_DIR}")
fi
fi
cd ${ROOT_DIR}
if [ -n "${SKIP_IF_VERSION_MATCHES}" ]; then
if [ -f "${DIST_DIR}/vmlinux" ]; then
kernelversion="$(cd ${KERNEL_DIR} && make -s ${TOOL_ARGS} O=${OUT_DIR} kernelrelease)"
# Split grep into 2 steps. "Linux version" will always be towards top and fast to find. Don't
# need to search the entire vmlinux for it
if [[ ! "$kernelversion" =~ .*dirty.* ]] && \
grep -o -a -m1 "Linux version [^ ]* " ${DIST_DIR}/vmlinux | grep -q " ${kernelversion} " ; then
echo "========================================================"
echo " Skipping build because kernel version matches ${kernelversion}"
exit 0
fi
fi
fi
mkdir -p ${OUT_DIR} ${DIST_DIR}
if [ -n "${GKI_PREBUILTS_DIR}" ]; then
echo "========================================================"
echo " Copying GKI prebuilts"
GKI_PREBUILTS_DIR=$(readlink -m ${GKI_PREBUILTS_DIR})
if [ ! -d "${GKI_PREBUILTS_DIR}" ]; then
echo "ERROR: ${GKI_PREBULTS_DIR} does not exist." >&2
exit 1
fi
for file in ${GKI_PREBUILTS_DIR}/*; do
filename=$(basename ${file})
if ! $(cmp -s ${file} ${DIST_DIR}/${filename}); then
cp -v ${file} ${DIST_DIR}/${filename}
fi
done
MAKE_ARGS+=("KBUILD_MIXED_TREE=${GKI_PREBUILTS_DIR}")
fi
echo "========================================================"
echo " Setting up for build"
if [ "${SKIP_MRPROPER}" != "1" ] ; then
set -x
(cd ${KERNEL_DIR} && make ${TOOL_ARGS} O=${OUT_DIR} "${MAKE_ARGS[@]}" mrproper)
set +x
fi
if [ -n "${PRE_DEFCONFIG_CMDS}" ]; then
echo "========================================================"
echo " Running pre-defconfig command(s):"
set -x
eval ${PRE_DEFCONFIG_CMDS}
set +x
fi
if [ "${SKIP_DEFCONFIG}" != "1" ] ; then
set -x
(cd ${KERNEL_DIR} && make ${TOOL_ARGS} O=${OUT_DIR} "${MAKE_ARGS[@]}" ${DEFCONFIG})
set +x
if [ -n "${POST_DEFCONFIG_CMDS}" ]; then
echo "========================================================"
echo " Running pre-make command(s):"
set -x
eval ${POST_DEFCONFIG_CMDS}
set +x
fi
fi
if [ "${LTO}" = "none" -o "${LTO}" = "thin" -o "${LTO}" = "full" ]; then
echo "========================================================"
echo " Modifying LTO mode to '${LTO}'"
set -x
if [ "${LTO}" = "none" ]; then
${KERNEL_DIR}/scripts/config --file ${OUT_DIR}/.config \
-d LTO_CLANG \
-e LTO_NONE \
-d LTO_CLANG_THIN \
-d LTO_CLANG_FULL \
-d THINLTO
elif [ "${LTO}" = "thin" ]; then
# This is best-effort; some kernels don't support LTO_THIN mode
# THINLTO was the old name for LTO_THIN, and it was 'default y'
${KERNEL_DIR}/scripts/config --file ${OUT_DIR}/.config \
-e LTO_CLANG \
-d LTO_NONE \
-e LTO_CLANG_THIN \
-d LTO_CLANG_FULL \
-e THINLTO
elif [ "${LTO}" = "full" ]; then
# THINLTO was the old name for LTO_THIN, and it was 'default y'
${KERNEL_DIR}/scripts/config --file ${OUT_DIR}/.config \
-e LTO_CLANG \
-d LTO_NONE \
-d LTO_CLANG_THIN \
-e LTO_CLANG_FULL \
-d THINLTO
fi
(cd ${OUT_DIR} && make ${TOOL_ARGS} O=${OUT_DIR} "${MAKE_ARGS[@]}" olddefconfig)
set +x
elif [ -n "${LTO}" ]; then
echo "LTO= must be one of 'none', 'thin' or 'full'."
exit 1
fi
if [ -n "${TAGS_CONFIG}" ]; then
echo "========================================================"
echo " Running tags command:"
set -x
(cd ${KERNEL_DIR} && SRCARCH=${ARCH} ./scripts/tags.sh ${TAGS_CONFIG})
set +x
exit 0
fi
# Truncate abi.prop file
ABI_PROP=${DIST_DIR}/abi.prop
: > ${ABI_PROP}
if [ -n "${ABI_DEFINITION}" ]; then
ABI_XML=${DIST_DIR}/abi.xml
echo "KMI_DEFINITION=abi.xml" >> ${ABI_PROP}
echo "KMI_MONITORED=1" >> ${ABI_PROP}
if [ "${KMI_ENFORCED}" = "1" ]; then
echo "KMI_ENFORCED=1" >> ${ABI_PROP}
fi
fi
if [ -n "${KMI_SYMBOL_LIST}" ]; then
ABI_SL=${DIST_DIR}/abi_symbollist
echo "KMI_SYMBOL_LIST=abi_symbollist" >> ${ABI_PROP}
fi
# define the kernel binary and modules archive in the $ABI_PROP
echo "KERNEL_BINARY=vmlinux" >> ${ABI_PROP}
if [ "${COMPRESS_UNSTRIPPED_MODULES}" = "1" ]; then
echo "MODULES_ARCHIVE=${UNSTRIPPED_MODULES_ARCHIVE}" >> ${ABI_PROP}
fi
# Copy the abi_${arch}.xml file from the sources into the dist dir
if [ -n "${ABI_DEFINITION}" ]; then
echo "========================================================"
echo " Copying abi definition to ${ABI_XML}"
pushd $ROOT_DIR/$KERNEL_DIR
cp "${ABI_DEFINITION}" ${ABI_XML}
popd
fi
# Copy the abi symbol list file from the sources into the dist dir
if [ -n "${KMI_SYMBOL_LIST}" ]; then
${ROOT_DIR}/build/abi/process_symbols --out-dir="$DIST_DIR" --out-file=abi_symbollist \
--report-file=abi_symbollist.report --in-dir="$ROOT_DIR/$KERNEL_DIR" \
"${KMI_SYMBOL_LIST}" ${ADDITIONAL_KMI_SYMBOL_LISTS}
pushd $ROOT_DIR/$KERNEL_DIR
if [ "${TRIM_NONLISTED_KMI}" = "1" ]; then
# Create the raw symbol list
cat ${ABI_SL} | \
${ROOT_DIR}/build/abi/flatten_symbol_list > \
${OUT_DIR}/abi_symbollist.raw
# Update the kernel configuration
./scripts/config --file ${OUT_DIR}/.config \
-d UNUSED_SYMBOLS -e TRIM_UNUSED_KSYMS \
--set-str UNUSED_KSYMS_WHITELIST ${OUT_DIR}/abi_symbollist.raw
(cd ${OUT_DIR} && \
make O=${OUT_DIR} ${TOOL_ARGS} "${MAKE_ARGS[@]}" olddefconfig)
# Make sure the config is applied
grep CONFIG_UNUSED_KSYMS_WHITELIST ${OUT_DIR}/.config > /dev/null || {
echo "ERROR: Failed to apply TRIM_NONLISTED_KMI kernel configuration" >&2
echo "Does your kernel support CONFIG_UNUSED_KSYMS_WHITELIST?" >&2
exit 1
}
elif [ "${KMI_SYMBOL_LIST_STRICT_MODE}" = "1" ]; then
echo "ERROR: KMI_SYMBOL_LIST_STRICT_MODE requires TRIM_NONLISTED_KMI=1" >&2
exit 1
fi
popd # $ROOT_DIR/$KERNEL_DIR
elif [ "${TRIM_NONLISTED_KMI}" = "1" ]; then
echo "ERROR: TRIM_NONLISTED_KMI requires a KMI_SYMBOL_LIST" >&2
exit 1
elif [ "${KMI_SYMBOL_LIST_STRICT_MODE}" = "1" ]; then
echo "ERROR: KMI_SYMBOL_LIST_STRICT_MODE requires a KMI_SYMBOL_LIST" >&2
exit 1
fi
echo "========================================================"
echo " Building kernel"
set -x
(cd ${OUT_DIR} && make O=${OUT_DIR} ${TOOL_ARGS} "${MAKE_ARGS[@]}" ${MAKE_GOALS})
set +x
if [ -n "${POST_KERNEL_BUILD_CMDS}" ]; then
echo "========================================================"
echo " Running post-kernel-build command(s):"
set -x
eval ${POST_KERNEL_BUILD_CMDS}
set +x
fi
if [ -n "${MODULES_ORDER}" ]; then
echo "========================================================"
echo " Checking the list of modules:"
if ! diff -u "${KERNEL_DIR}/${MODULES_ORDER}" "${OUT_DIR}/modules.order"; then
echo "ERROR: modules list out of date" >&2
echo "Update it with:" >&2
echo "cp ${OUT_DIR}/modules.order ${KERNEL_DIR}/${MODULES_ORDER}" >&2
exit 1
fi
fi
if [ "${KMI_SYMBOL_LIST_STRICT_MODE}" = "1" ]; then
echo "========================================================"
echo " Comparing the KMI and the symbol lists:"
set -x
gki_modules_list="${ROOT_DIR}/${KERNEL_DIR}/android/gki_system_dlkm_modules"
KMI_STRICT_MODE_OBJECTS="vmlinux $(sed 's/\.ko$//' ${gki_modules_list} | tr '\n' ' ')" \
${ROOT_DIR}/build/abi/compare_to_symbol_list "${OUT_DIR}/Module.symvers" \
"${OUT_DIR}/abi_symbollist.raw"
set +x
fi
rm -rf ${MODULES_STAGING_DIR}
mkdir -p ${MODULES_STAGING_DIR}
if [ "${DO_NOT_STRIP_MODULES}" != "1" ]; then
MODULE_STRIP_FLAG="INSTALL_MOD_STRIP=1"
fi
if [ "${BUILD_INITRAMFS}" = "1" -o -n "${IN_KERNEL_MODULES}" ]; then
echo "========================================================"
echo " Installing kernel modules into staging directory"
(cd ${OUT_DIR} && \
make O=${OUT_DIR} ${TOOL_ARGS} ${MODULE_STRIP_FLAG} \
INSTALL_MOD_PATH=${MODULES_STAGING_DIR} "${MAKE_ARGS[@]}" modules_install)
fi
if [[ -z "${SKIP_EXT_MODULES}" ]] && [[ -n "${EXT_MODULES_MAKEFILE}" ]]; then
echo "========================================================"
echo " Building and installing external modules using ${EXT_MODULES_MAKEFILE}"
make -f "${EXT_MODULES_MAKEFILE}" KERNEL_SRC=${ROOT_DIR}/${KERNEL_DIR} \
O=${OUT_DIR} ${TOOL_ARGS} ${MODULE_STRIP_FLAG} \
INSTALL_HDR_PATH="${KERNEL_UAPI_HEADERS_DIR}/usr" \
INSTALL_MOD_PATH=${MODULES_STAGING_DIR} "${MAKE_ARGS[@]}"
fi
if [[ -z "${SKIP_EXT_MODULES}" ]] && [[ -n "${EXT_MODULES}" ]]; then
echo "========================================================"
echo " Building external modules and installing them into staging directory"
for EXT_MOD in ${EXT_MODULES}; do
# The path that we pass in via the variable M needs to be a relative path
# relative to the kernel source directory. The source files will then be
# looked for in ${KERNEL_DIR}/${EXT_MOD_REL} and the object files (i.e. .o
# and .ko) files will be stored in ${OUT_DIR}/${EXT_MOD_REL}. If we
# instead set M to an absolute path, then object (i.e. .o and .ko) files
# are stored in the module source directory which is not what we want.
EXT_MOD_REL=$(rel_path ${ROOT_DIR}/${EXT_MOD} ${KERNEL_DIR})
# The output directory must exist before we invoke make. Otherwise, the
# build system behaves horribly wrong.
mkdir -p ${OUT_DIR}/${EXT_MOD_REL}
set -x
make -C ${EXT_MOD} M=${EXT_MOD_REL} KERNEL_SRC=${ROOT_DIR}/${KERNEL_DIR} \
O=${OUT_DIR} ${TOOL_ARGS} "${MAKE_ARGS[@]}"
make -C ${EXT_MOD} M=${EXT_MOD_REL} KERNEL_SRC=${ROOT_DIR}/${KERNEL_DIR} \
O=${OUT_DIR} ${TOOL_ARGS} ${MODULE_STRIP_FLAG} \
INSTALL_MOD_PATH=${MODULES_STAGING_DIR} \
INSTALL_MOD_DIR="extra/${EXT_MOD}" \
INSTALL_HDR_PATH="${KERNEL_UAPI_HEADERS_DIR}/usr" \
"${MAKE_ARGS[@]}" modules_install
set +x
done
fi
if [ "${BUILD_GKI_CERTIFICATION_TOOLS}" = "1" ]; then
GKI_CERTIFICATION_TOOLS_TAR="gki_certification_tools.tar.gz"
echo "========================================================"
echo " Generating ${GKI_CERTIFICATION_TOOLS_TAR}"
GKI_CERTIFICATION_BINARIES=(avbtool certify_bootimg)
GKI_CERTIFICATION_TOOLS_ROOT="${ROOT_DIR}/prebuilts/kernel-build-tools/linux-x86"
GKI_CERTIFICATION_FILES="${GKI_CERTIFICATION_BINARIES[@]/#/bin/}"
tar -czf ${DIST_DIR}/${GKI_CERTIFICATION_TOOLS_TAR} \
-C ${GKI_CERTIFICATION_TOOLS_ROOT} ${GKI_CERTIFICATION_FILES}
fi
echo "========================================================"
echo " Generating test_mappings.zip"
TEST_MAPPING_FILES=${OUT_DIR}/test_mapping_files.txt
find ${ROOT_DIR} -name TEST_MAPPING \
-not -path "${ROOT_DIR}/\.git*" \
-not -path "${ROOT_DIR}/\.repo*" \
-not -path "${ROOT_DIR}/out*" \
> ${TEST_MAPPING_FILES}
soong_zip -o ${DIST_DIR}/test_mappings.zip -C ${ROOT_DIR} -l ${TEST_MAPPING_FILES}
if [ -n "${EXTRA_CMDS}" ]; then
echo "========================================================"
echo " Running extra build command(s):"
set -x
eval ${EXTRA_CMDS}
set +x
fi
OVERLAYS_OUT=""
for ODM_DIR in ${ODM_DIRS}; do
OVERLAY_DIR=${ROOT_DIR}/device/${ODM_DIR}/overlays
if [ -d ${OVERLAY_DIR} ]; then
OVERLAY_OUT_DIR=${OUT_DIR}/overlays/${ODM_DIR}
mkdir -p ${OVERLAY_OUT_DIR}
make -C ${OVERLAY_DIR} DTC=${OUT_DIR}/scripts/dtc/dtc \
OUT_DIR=${OVERLAY_OUT_DIR} "${MAKE_ARGS[@]}"
OVERLAYS=$(find ${OVERLAY_OUT_DIR} -name "*.dtbo")
OVERLAYS_OUT="$OVERLAYS_OUT $OVERLAYS"
fi
done
echo "========================================================"
echo " Copying files"
for FILE in ${FILES}; do
if [ -f ${OUT_DIR}/${FILE} ]; then
echo " $FILE"
cp -p ${OUT_DIR}/${FILE} ${DIST_DIR}/
elif [[ "${FILE}" =~ \.dtb|\.dtbo ]] && \
[ -n "${DTS_EXT_DIR}" ] && [ -f "${OUT_DIR}/${DTS_EXT_DIR}/${FILE}" ] ; then
# DTS_EXT_DIR is recalculated before to be relative to KERNEL_DIR
echo " $FILE"
cp -p "${OUT_DIR}/${DTS_EXT_DIR}/${FILE}" "${DIST_DIR}/"
else
echo " $FILE is not a file, skipping"
fi
done
if [ -f ${OUT_DIR}/vmlinux-gdb.py ]; then
echo "========================================================"
KERNEL_GDB_SCRIPTS_TAR=${DIST_DIR}/kernel-gdb-scripts.tar.gz
echo " Copying kernel gdb scripts to $KERNEL_GDB_SCRIPTS_TAR"
(cd $OUT_DIR && tar -czf $KERNEL_GDB_SCRIPTS_TAR --dereference vmlinux-gdb.py scripts/gdb/linux/*.py)
fi
for FILE in ${OVERLAYS_OUT}; do
OVERLAY_DIST_DIR=${DIST_DIR}/$(dirname ${FILE#${OUT_DIR}/overlays/})
echo " ${FILE#${OUT_DIR}/}"
mkdir -p ${OVERLAY_DIST_DIR}
cp ${FILE} ${OVERLAY_DIST_DIR}/
done
if [ -z "${SKIP_CP_KERNEL_HDR}" ]; then
echo "========================================================"
echo " Installing UAPI kernel headers:"
mkdir -p "${KERNEL_UAPI_HEADERS_DIR}/usr"
make -C ${OUT_DIR} O=${OUT_DIR} ${TOOL_ARGS} \
INSTALL_HDR_PATH="${KERNEL_UAPI_HEADERS_DIR}/usr" "${MAKE_ARGS[@]}" \
headers_install
# The kernel makefiles create files named ..install.cmd and .install which
# are only side products. We don't want those. Let's delete them.
find ${KERNEL_UAPI_HEADERS_DIR} \( -name ..install.cmd -o -name .install \) -exec rm '{}' +
KERNEL_UAPI_HEADERS_TAR=${DIST_DIR}/kernel-uapi-headers.tar.gz
echo " Copying kernel UAPI headers to ${KERNEL_UAPI_HEADERS_TAR}"
tar -czf ${KERNEL_UAPI_HEADERS_TAR} --directory=${KERNEL_UAPI_HEADERS_DIR} usr/
fi
if [ -z "${SKIP_CP_KERNEL_HDR}" ] ; then
echo "========================================================"
KERNEL_HEADERS_TAR=${DIST_DIR}/kernel-headers.tar.gz
echo " Copying kernel headers to ${KERNEL_HEADERS_TAR}"
pushd $ROOT_DIR/$KERNEL_DIR
find arch include $OUT_DIR -name *.h -print0 \
| tar -czf $KERNEL_HEADERS_TAR \
--absolute-names \
--dereference \
--transform "s,.*$OUT_DIR,," \
--transform "s,^,kernel-headers/," \
--null -T -
popd
fi
if [ "${GENERATE_VMLINUX_BTF}" = "1" ]; then
echo "========================================================"
echo " Generating ${DIST_DIR}/vmlinux.btf"
(
cd ${DIST_DIR}
cp -a vmlinux vmlinux.btf
pahole -J vmlinux.btf
llvm-strip --strip-debug vmlinux.btf
)
fi
if [ -n "${GKI_DIST_DIR}" ]; then
echo "========================================================"
echo " Copying files from GKI kernel"
cp -rv ${GKI_DIST_DIR}/* ${DIST_DIR}/
fi
if [ -n "${DIST_CMDS}" ]; then
echo "========================================================"
echo " Running extra dist command(s):"
# if DIST_CMDS requires UAPI headers, make sure a warning appears!
if [ ! -d "${KERNEL_UAPI_HEADERS_DIR}/usr" ]; then
echo "WARN: running without UAPI headers"
fi
set -x
eval ${DIST_CMDS}
set +x
fi
MODULES=$(find ${MODULES_STAGING_DIR} -type f -name "*.ko")
if [ -n "${MODULES}" ]; then