#!/bin/sh# SPDX-License-Identifier: GPL-2.0 # This script generates an archive consisting of kernel headers# for CONFIG_IKHEADERS.set -etarfile=$1srclist=$2objlist=$3timestamp=$4 dir=$(dirname "${tarfile}")tmpdir=${dir}/.tmp_dirdepfile=${dir}/.$(basename "${tarfile}").d # generate dependency list.{	echo	echo "deps_${tarfile} := \\"	sed 's:\(.*\):  \1 \\:' "${srclist}"	sed -n '/^include\/generated\/autoconf\.h$/!s:\(.*\):  \1 \\:p' "${objlist}"	echo	echo "${tarfile}: \$(deps_${tarfile})"	echo	echo "\$(deps_${tarfile}):" } > "${depfile}" rm -rf "${tmpdir}"mkdir "${tmpdir}" # shellcheck disable=SC2154 # srctree is passed as an env variablesed "s:^${srctree}/::" "${srclist}" | ${TAR} -c -f - -C "${srctree}" -T - | ${TAR} -xf - -C "${tmpdir}"${TAR} -c -f - -T "${objlist}" | ${TAR} -xf - -C "${tmpdir}" # Remove comments except SDPX lines# Use a temporary file to store directory contents to prevent find/xargs from# seeing temporary files created by perl.find "${tmpdir}" -type f -print0 > "${tmpdir}.contents.txt"xargs -0 -P8 -n1 \	perl -pi -e 'BEGIN {undef $/;}; s/\/\*((?!SPDX).)*?\*\///smg;' \	< "${tmpdir}.contents.txt"rm -f "${tmpdir}.contents.txt" # Create archive and try to normalize metadata for reproducibility.${TAR} "${timestamp:+--mtime=$timestamp}" \    --owner=0 --group=0 --sort=name --numeric-owner --mode=u=rw,go=r,a+X \    -I "${XZ}" -cf "${tarfile}" -C "${tmpdir}/" . > /dev/null rm -rf "${tmpdir}"