1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0-only 3 4set -eu 5 6destdir=${1} 7 8is_enabled() { 9 grep -q "^$1=y" include/config/auto.conf 10} 11 12find_in_scripts() { 13 find scripts \ 14 \( -name atomic -o -name dtc -o -name kconfig -o -name package \) -prune -o \ 15 ! -name unifdef -a ! -name mk_elfconfig -a \( -type f -o -type l \) -print 16} 17 18mkdir -p "${destdir}" 19 20( 21 cd "${srctree}" 22 echo Makefile 23 find "arch/${SRCARCH}" -maxdepth 1 -name 'Makefile*' 24 find "arch/${SRCARCH}" -name generated -prune -o -name include -type d -print 25 find "arch/${SRCARCH}" -name Kbuild.platforms -o -name Platform 26 find include \( -name config -o -name generated \) -prune -o \( -type f -o -type l \) -print 27 find_in_scripts 28) | tar -c -f - -C "${srctree}" -T - | tar -xf - -C "${destdir}" 29 30{ 31 if is_enabled CONFIG_OBJTOOL; then 32 echo tools/objtool/objtool 33 fi 34 35 echo Module.symvers 36 echo "arch/${SRCARCH}/include/generated" 37 echo include/config/auto.conf 38 echo include/config/kernel.release 39 echo include/generated 40 find_in_scripts 41 42 if is_enabled CONFIG_GCC_PLUGINS; then 43 find scripts/gcc-plugins -name '*.so' 44 fi 45} | tar -c -f - -T - | tar -xf - -C "${destdir}" 46 47# When ${CC} and ${HOSTCC} differ, rebuild host programs using ${CC}. 48# 49# This caters to host programs that participate in Kbuild. objtool and 50# resolve_btfids are out of scope. 51if [ "${CC}" != "${HOSTCC}" ]; then 52 cat "${destdir}/scripts/Makefile" - <<-'EOF' > "${destdir}/scripts/Kbuild" 53 subdir-y += basic 54 hostprogs-always-y += mod/modpost 55 mod/modpost-objs := $(addprefix mod/, modpost.o file2alias.o sumversion.o symsearch.o) 56 EOF 57 58 # HOSTCXX is not overridden. The C++ compiler is used to build: 59 # - scripts/kconfig/qconf, which is unneeded for external module builds 60 # - GCC plugins, which will not work on the installed system even after 61 # being rebuilt. 62 # 63 # Clear VPATH and srcroot because the source files reside in the output 64 # directory. 65 # shellcheck disable=SC2016 # $(MAKE) and $(build) will be expanded by Make 66 "${MAKE}" run-command KBUILD_RUN_COMMAND='+$(MAKE) HOSTCC='"${CC}"' VPATH= srcroot=. $(build)='"$(realpath --relative-base=. "${destdir}")"/scripts 67 68 rm -f "${destdir}/scripts/Kbuild" 69fi 70 71find "${destdir}" \( -name '.*.cmd' -o -name '*.o' \) -delete 72