| # 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. |
| |
| # This is an implementation detail of Kleaf. Do not source directly as it will |
| # spoil your shell. You have been warned! If you have a good reason to source |
| # the result of this file into a shell, please let kernel-team@android.com know |
| # and we will be happy to help with your use case. |
| |
| [ -n "$_SETUP_ENV_SH_INCLUDED" ] && return || export _SETUP_ENV_SH_INCLUDED=1 |
| |
| # TODO: Use a $(gettop) style method. |
| export ROOT_DIR=$(readlink -f $PWD) |
| |
| export BUILD_CONFIG=${BUILD_CONFIG:-build.config} |
| |
| # Helper function to let build.config files add command to PRE_DEFCONFIG_CMDS, EXTRA_CMDS, etc. |
| # Usage: append_cmd PRE_DEFCONFIG_CMDS 'the_cmd' |
| function append_cmd() { |
| if [ ! -z "${!1}" ]; then |
| eval "$1=\"${!1} && \$2\"" |
| else |
| eval "$1=\"\$2\"" |
| fi |
| } |
| export -f append_cmd |
| |
| export KERNEL_DIR |
| # for case that KERNEL_DIR is not specified in environment |
| if [ -z "${KERNEL_DIR}" ]; then |
| # for the case that KERNEL_DIR is not specified in the BUILD_CONFIG file |
| # use the directory of the build config file as KERNEL_DIR |
| # for the case that KERNEL_DIR is specified in the BUILD_CONFIG file, |
| # or via the config files sourced, the value of KERNEL_DIR |
| # set here would be overwritten, and the specified value would be used. |
| build_config_path=$(readlink -f ${ROOT_DIR}/${BUILD_CONFIG}) |
| real_root_dir=${build_config_path%%${BUILD_CONFIG}} |
| build_config_dir=$(dirname ${build_config_path}) |
| build_config_dir=${build_config_dir##${ROOT_DIR}/} |
| build_config_dir=${build_config_dir##${real_root_dir}} |
| KERNEL_DIR="${build_config_dir}" |
| fi |
| |
| set -a |
| . ${ROOT_DIR}/${BUILD_CONFIG} |
| for fragment in ${BUILD_CONFIG_FRAGMENTS}; do |
| . ${ROOT_DIR}/${fragment} |
| done |
| set +a |
| |
| # For incremental kernel development, it is beneficial to trade certain |
| # optimizations for faster builds. |
| if [[ -n "${FAST_BUILD}" ]]; then |
| # Decrease lz4 compression level to significantly speed up ramdisk compression. |
| : ${LZ4_RAMDISK_COMPRESS_ARGS:="--fast"} |
| # Use ThinLTO for fast incremental compiles |
| : ${LTO:="thin"} |
| # skip installing kernel headers |
| : ${SKIP_CP_KERNEL_HDR:="1"} |
| fi |
| |
| export COMMON_OUT_DIR=$(readlink -m ${OUT_DIR:-${ROOT_DIR}/out${OUT_DIR_SUFFIX}/${BRANCH}}) |
| export OUT_DIR=$(readlink -m ${COMMON_OUT_DIR}/${KERNEL_DIR}) |
| export DIST_DIR=$(readlink -m ${DIST_DIR:-${COMMON_OUT_DIR}/dist}) |
| export UNSTRIPPED_DIR=${DIST_DIR}/unstripped |
| export UNSTRIPPED_MODULES_ARCHIVE=unstripped_modules.tar.gz |
| export MODULES_ARCHIVE=modules.tar.gz |
| |
| export TZ=UTC |
| export LC_ALL=C |
| if [ -z "${SOURCE_DATE_EPOCH}" ]; then |
| if [[ -n "${KLEAF_SOURCE_DATE_EPOCHS}" ]]; then |
| export SOURCE_DATE_EPOCH=$(extract_git_metadata "${KLEAF_SOURCE_DATE_EPOCHS}" "${KERNEL_DIR}" SOURCE_DATE_EPOCH) |
| # Unset KLEAF_SOURCE_DATE_EPOCHS to avoid polluting {kernel_build}_env.sh |
| # with unnecessary information (git metadata of unrelated projects) |
| unset KLEAF_SOURCE_DATE_EPOCHS |
| else |
| export SOURCE_DATE_EPOCH=$(git -C ${ROOT_DIR}/${KERNEL_DIR} log -1 --pretty=%ct) |
| fi |
| fi |
| if [ -z "${SOURCE_DATE_EPOCH}" ]; then |
| echo "WARNING: Unable to determine SOURCE_DATE_EPOCH for ${ROOT_DIR}/${KERNEL_DIR}, fallback to 0" >&2 |
| export SOURCE_DATE_EPOCH=0 |
| fi |
| export KBUILD_BUILD_TIMESTAMP="$(date -d @${SOURCE_DATE_EPOCH})" |
| export KBUILD_BUILD_HOST=build-host |
| export KBUILD_BUILD_USER=build-user |
| export KBUILD_BUILD_VERSION=1 |
| |
| # List of prebuilt directories shell variables to incorporate into PATH |
| prebuilts_paths=( |
| LINUX_GCC_CROSS_COMPILE_PREBUILTS_BIN |
| LINUX_GCC_CROSS_COMPILE_ARM32_PREBUILTS_BIN |
| LINUX_GCC_CROSS_COMPILE_COMPAT_PREBUILTS_BIN |
| CLANG_PREBUILT_BIN |
| CLANGTOOLS_PREBUILT_BIN |
| RUST_PREBUILT_BIN |
| LZ4_PREBUILTS_BIN |
| DTC_PREBUILTS_BIN |
| LIBUFDT_PREBUILTS_BIN |
| BUILDTOOLS_PREBUILT_BIN |
| KLEAF_INTERNAL_BUILDTOOLS_PREBUILT_BIN |
| ) |
| |
| unset LD_LIBRARY_PATH |
| |
| if [ "${HERMETIC_TOOLCHAIN:-0}" -eq 1 ]; then |
| HOST_TOOLS=${OUT_DIR}/host_tools |
| rm -rf ${HOST_TOOLS} |
| mkdir -p ${HOST_TOOLS} |
| for tool in \ |
| bash \ |
| git \ |
| perl \ |
| rsync \ |
| sh \ |
| ${ADDITIONAL_HOST_TOOLS} |
| do |
| ln -sf $(which $tool) ${HOST_TOOLS} |
| done |
| PATH=${HOST_TOOLS} |
| fi |
| |
| for prebuilt_bin in "${prebuilts_paths[@]}"; do |
| prebuilt_bin=\${${prebuilt_bin}} |
| eval prebuilt_bin="${prebuilt_bin}" |
| if [ -n "${prebuilt_bin}" ]; then |
| # Mitigate dup paths |
| PATH=${PATH//"${ROOT_DIR}\/${prebuilt_bin}:"} |
| PATH=${ROOT_DIR}/${prebuilt_bin}:${PATH} |
| fi |
| done |
| export PATH |
| |
| unset PYTHONPATH |
| unset PYTHONHOME |
| unset PYTHONSTARTUP |
| |
| export HOSTCC HOSTCXX CC LD AR NM OBJCOPY OBJDUMP OBJSIZE READELF STRIP AS |
| |
| tool_args=() |
| |
| # LLVM=1 implies what is otherwise set below; it is a more concise way of |
| # specifying CC=clang LD=ld.lld NM=llvm-nm OBJCOPY=llvm-objcopy <etc>, for |
| # newer kernel versions. |
| if [[ -n "${LLVM}" ]]; then |
| tool_args+=("LLVM=1") |
| # Reset a bunch of variables that the kernel's top level Makefile does, just |
| # in case someone tries to use these binaries in this script such as in |
| # initramfs generation below. |
| HOSTCC=clang |
| HOSTCXX=clang++ |
| CC=clang |
| LD=ld.lld |
| AR=llvm-ar |
| NM=llvm-nm |
| OBJCOPY=llvm-objcopy |
| OBJDUMP=llvm-objdump |
| OBJSIZE=llvm-size |
| READELF=llvm-readelf |
| STRIP=llvm-strip |
| else |
| if [ -n "${HOSTCC}" ]; then |
| tool_args+=("HOSTCC=${HOSTCC}") |
| fi |
| |
| if [ -n "${CC}" ]; then |
| tool_args+=("CC=${CC}") |
| if [ -z "${HOSTCC}" ]; then |
| tool_args+=("HOSTCC=${CC}") |
| fi |
| fi |
| |
| if [ -n "${LD}" ]; then |
| tool_args+=("LD=${LD}" "HOSTLD=${LD}") |
| fi |
| |
| if [ -n "${NM}" ]; then |
| tool_args+=("NM=${NM}") |
| fi |
| |
| if [ -n "${OBJCOPY}" ]; then |
| tool_args+=("OBJCOPY=${OBJCOPY}") |
| fi |
| fi |
| |
| if [ -n "${LLVM_IAS}" ]; then |
| tool_args+=("LLVM_IAS=${LLVM_IAS}") |
| # Reset $AS for the same reason that we reset $CC etc above. |
| AS=clang |
| fi |
| |
| if [ -n "${DEPMOD}" ]; then |
| tool_args+=("DEPMOD=${DEPMOD}") |
| fi |
| |
| if [ -n "${DTC}" ]; then |
| tool_args+=("DTC=${DTC}") |
| fi |
| |
| export TOOL_ARGS="${tool_args[@]}" |
| |
| export DECOMPRESS_GZIP DECOMPRESS_LZ4 RAMDISK_COMPRESS RAMDISK_DECOMPRESS RAMDISK_EXT |
| |
| DECOMPRESS_GZIP="gzip -c -d" |
| DECOMPRESS_LZ4="lz4 -c -d -l" |
| if [ -z "${LZ4_RAMDISK}" ] ; then |
| RAMDISK_COMPRESS="gzip -c -f" |
| RAMDISK_DECOMPRESS="${DECOMPRESS_GZIP}" |
| RAMDISK_EXT="gz" |
| else |
| RAMDISK_COMPRESS="lz4 -c -l ${LZ4_RAMDISK_COMPRESS_ARGS:--12 --favor-decSpeed}" |
| RAMDISK_DECOMPRESS="${DECOMPRESS_LZ4}" |
| RAMDISK_EXT="lz4" |
| fi |
| |
| # Set libclang.so location for use by bindgen for Rust |
| LIBCLANG_PATH=${ROOT_DIR}/${CLANG_PREBUILT_BIN}/../lib/ |
| export LIBCLANG_PATH |
| |
| # verifies that defconfig matches the DEFCONFIG |
| function check_defconfig() { |
| (cd ${OUT_DIR} && \ |
| make ${TOOL_ARGS} O=${OUT_DIR} savedefconfig) |
| [ "$ARCH" = "x86_64" -o "$ARCH" = "i386" ] && local ARCH=x86 |
| RES=0 |
| if [[ -f ${KERNEL_DIR}/arch/${ARCH}/configs/${DEFCONFIG} ]]; then |
| diff -u ${KERNEL_DIR}/arch/${ARCH}/configs/${DEFCONFIG} ${OUT_DIR}/defconfig >&2 || |
| RES=$? |
| else |
| diff -u ${OUT_DIR}/arch/${ARCH}/configs/${DEFCONFIG} ${OUT_DIR}/defconfig >&2 || |
| RES=$? |
| fi |
| if [ ${RES} -ne 0 ]; then |
| echo ERROR: savedefconfig does not match ${KERNEL_DIR}/arch/${ARCH}/configs/${DEFCONFIG} >&2 |
| fi |
| return ${RES} |
| } |
| export -f check_defconfig |