#!/bin/sh# SPDX-License-Identifier: GPL-2.0-only set -eu destdir=${1} is_enabled() {	grep -q "^$1=y" include/config/auto.conf} find_in_scripts() {	find scripts \		\( -name atomic -o -name dtc -o -name kconfig -o -name package \) -prune -o \		! -name unifdef -a ! -name mk_elfconfig -a \( -type f -o -type l \) -print} mkdir -p "${destdir}" (	cd "${srctree}"	echo Makefile	find "arch/${SRCARCH}" -maxdepth 1 -name 'Makefile*'	find "arch/${SRCARCH}" -name generated -prune -o -name include -type d -print	find "arch/${SRCARCH}" -name Kbuild.platforms -o -name Platform	find include \( -name config -o -name generated \) -prune -o \( -type f -o -type l \) -print	find_in_scripts) | tar -c -f - -C "${srctree}" -T - | tar -xf - -C "${destdir}" {	if is_enabled CONFIG_OBJTOOL; then		echo tools/objtool/objtool	fi 	echo Module.symvers	echo "arch/${SRCARCH}/include/generated"	echo include/config/auto.conf	echo include/config/kernel.release	echo include/generated	find_in_scripts 	if is_enabled CONFIG_GCC_PLUGINS; then		find scripts/gcc-plugins -name '*.so'	fi} | tar -c -f - -T - | tar -xf - -C "${destdir}" # When ${CC} and ${HOSTCC} differ, rebuild host programs using ${CC}.## This caters to host programs that participate in Kbuild. objtool and# resolve_btfids are out of scope.if [ "${CC}" != "${HOSTCC}" ]; then	echo "Rebuilding host programs with ${CC}..." 	# This leverages external module building.	# - Clear sub_make_done to allow the top-level Makefile to redo sub-make.	# - Filter out --no-print-directory to print "Entering directory" logs	#   when Make changes the working directory.	unset sub_make_done	MAKEFLAGS=$(echo "${MAKEFLAGS}" | sed s/--no-print-directory//) 	cat <<-'EOF' >  "${destdir}/Kbuild"	subdir-y := scripts	EOF 	# HOSTCXX is not overridden. The C++ compiler is used to build:	# - scripts/kconfig/qconf, which is unneeded for external module builds	# - GCC plugins, which will not work on the installed system even after	#   being rebuilt.	#	# Use the single-target build to avoid the modpost invocation, which	# would overwrite Module.symvers.	"${MAKE}" HOSTCC="${CC}" KBUILD_OUTPUT=. KBUILD_EXTMOD="${destdir}" scripts/ 	cat <<-'EOF' >  "${destdir}/scripts/Kbuild"	subdir-y := basic	hostprogs-always-y := mod/modpost	mod/modpost-objs := $(addprefix mod/, modpost.o file2alias.o sumversion.o symsearch.o)	EOF 	# Run once again to rebuild scripts/basic/ and scripts/mod/modpost.	"${MAKE}" HOSTCC="${CC}" KBUILD_OUTPUT=. KBUILD_EXTMOD="${destdir}" scripts/ 	rm -f "${destdir}/Kbuild" "${destdir}/scripts/Kbuild"fi find "${destdir}" \( -name '.*.cmd' -o -name '*.o' \) -delete