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 if is_enabled CONFIG_DEBUG_INFO_BTF_MODULES; then 36 echo tools/bpf/resolve_btfids/resolve_btfids 37 fi 38 39 echo Module.symvers 40 echo "arch/${SRCARCH}/include/generated" 41 echo include/config/auto.conf 42 echo include/config/kernel.release 43 echo include/generated 44 find_in_scripts 45 46 if is_enabled CONFIG_GCC_PLUGINS; then 47 find scripts/gcc-plugins -name '*.so' 48 fi 49} | tar -c -f - -T - | tar -xf - -C "${destdir}" 50 51# When ${CC} and ${HOSTCC} differ, rebuild host programs using ${CC}. 52# 53# This caters to host programs that participate in Kbuild. objtool and 54# resolve_btfids are out of scope. 55if [ "${CC}" != "${HOSTCC}" ]; then 56 cat "${destdir}/scripts/Makefile" - <<-'EOF' > "${destdir}/scripts/Kbuild" 57 subdir-y += basic 58 hostprogs-always-y += mod/modpost 59 mod/modpost-objs := $(addprefix mod/, modpost.o file2alias.o sumversion.o symsearch.o) 60 EOF 61 62 # HOSTCXX is not overridden. The C++ compiler is used to build: 63 # - scripts/kconfig/qconf, which is unneeded for external module builds 64 # - GCC plugins, which will not work on the installed system even after 65 # being rebuilt. 66 # 67 # Clear VPATH and srcroot because the source files reside in the output 68 # directory. 69 # shellcheck disable=SC2016 # $(MAKE) and $(build) will be expanded by Make 70 "${MAKE}" run-command KBUILD_RUN_COMMAND='+$(MAKE) HOSTCC="'"${CC}"'" VPATH= srcroot=. $(build)='"$(realpath --relative-to=. "${destdir}")"/scripts 71 72 rm -f "${destdir}/scripts/Kbuild" 73fi 74 75find "${destdir}" \( -name '.*.cmd' -o -name '*.o' \) -delete 76