| # 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 build.sh and friends. Do not source |
| # directly as it will spoil your shell and make build.sh unusable. 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 are happy to help |
| # with your use case. |
| |
| [ -n "$_SETUP_ENV_SH_INCLUDED" ] && return || _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 "$1=\"\$2\"" |
| fi |
| } |
| |
| export KERNEL_DIR |
| # for case that KERNEL_DIR is not specified in environment |
| if [ -z "${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=$(realpath ${ROOT_DIR}/${BUILD_CONFIG}) |
| build_config_dir=$(dirname ${build_config_path}) |
| build_config_dir=${build_config_dir##${ROOT_DIR}/} |
| KERNEL_DIR="${build_config_dir}" |
| echo "= Set default KERNEL_DIR: ${KERNEL_DIR}" |
| else |
| echo "= User environment KERNEL_DIR: ${KERNEL_DIR}" |
| fi |
| |
| set -a |
| . ${ROOT_DIR}/${BUILD_CONFIG} |
| for fragment in ${BUILD_CONFIG_FRAGMENTS}; do |
| . ${ROOT_DIR}/${fragment} |
| done |
| set +a |
| |
| echo "= The final value for KERNEL_DIR: ${KERNEL_DIR}" |
| |
| export COMMON_OUT_DIR=$(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 |
| |
| echo "========================================================" |
| echo "= build config: ${ROOT_DIR}/${BUILD_CONFIG}" |
| cat ${ROOT_DIR}/${BUILD_CONFIG} |
| |
| export TZ=UTC |
| export LC_ALL=C |
| export SOURCE_DATE_EPOCH=$(git -C ${ROOT_DIR}/${KERNEL_DIR} log -1 --pretty=%ct) |
| 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 |
| LZ4_PREBUILTS_BIN |
| DTC_PREBUILTS_BIN |
| LIBUFDT_PREBUILTS_BIN |
| BUILDTOOLS_PREBUILT_BIN |
| ) |
| |
| 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 \ |
| tar \ |
| ${ADDITIONAL_HOST_TOOLS} |
| do |
| ln -sf $(which $tool) ${HOST_TOOLS} |
| done |
| PATH=${HOST_TOOLS} |
| |
| # use relative paths for file name references in the binaries |
| # (e.g. debug info) |
| export KCPPFLAGS="-ffile-prefix-map=${ROOT_DIR}/${KERNEL_DIR}/= -ffile-prefix-map=${ROOT_DIR}/=" |
| |
| # set the common sysroot |
| sysroot_flags+="--sysroot=${ROOT_DIR}/build/build-tools/sysroot " |
| |
| # add openssl (via boringssl) and other prebuilts into the lookup path |
| cflags+="-I${ROOT_DIR}/prebuilts/kernel-build-tools/linux-x86/include " |
| |
| # add openssl and further prebuilt libraries into the lookup path |
| ldflags+="-Wl,-rpath,${ROOT_DIR}/prebuilts/kernel-build-tools/linux-x86/lib64 " |
| ldflags+="-L ${ROOT_DIR}/prebuilts/kernel-build-tools/linux-x86/lib64 " |
| |
| # Have host compiler use LLD and compiler-rt. |
| ldflags+="-fuse-ld=lld --rtlib=compiler-rt" |
| |
| export HOSTCFLAGS="$sysroot_flags $cflags" |
| export HOSTLDFLAGS="$sysroot_flags $ldflags" |
| |
| export USERCFLAGS="--sysroot=/dev/null" |
| fi |
| |
| for PREBUILT_BIN in "${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}:${PATH} |
| fi |
| done |
| export PATH |
| unset PYTHONPATH |
| unset PYTHONHOME |
| unset PYTHONSTARTUP |
| |
| echo |
| echo "PATH=${PATH}" |
| echo |
| |
| # 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 |
| echo Verifying that savedefconfig matches ${KERNEL_DIR}/arch/${ARCH}/configs/${DEFCONFIG} |
| RES=0 |
| diff -u ${KERNEL_DIR}/arch/${ARCH}/configs/${DEFCONFIG} ${OUT_DIR}/defconfig >&2 || |
| RES=$? |
| 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 |