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, we are likely cross-compiling. Rebuild host 48# programs using ${CC}. This assumes CC=${CROSS_COMPILE}gcc, which is usually 49# the case for package building. It does not cross-compile when CC=clang. 50# 51# This caters to host programs that participate in Kbuild. objtool and 52# resolve_btfids are out of scope. 53if [ "${CC}" != "${HOSTCC}" ] && is_enabled CONFIG_CC_CAN_LINK; then 54 echo "Rebuilding host programs with ${CC}..." 55 56 cat <<-'EOF' > "${destdir}/Kbuild" 57 subdir-y := scripts 58 EOF 59 60 # HOSTCXX is not overridden. The C++ compiler is used to build: 61 # - scripts/kconfig/qconf, which is unneeded for external module builds 62 # - GCC plugins, which will not work on the installed system even after 63 # being rebuilt. 64 # 65 # Use the single-target build to avoid the modpost invocation, which 66 # would overwrite Module.symvers. 67 "${MAKE}" HOSTCC="${CC}" KBUILD_EXTMOD="${destdir}" scripts/ 68 69 cat <<-'EOF' > "${destdir}/scripts/Kbuild" 70 subdir-y := basic 71 hostprogs-always-y := mod/modpost 72 mod/modpost-objs := $(addprefix mod/, modpost.o file2alias.o sumversion.o symsearch.o) 73 EOF 74 75 # Run once again to rebuild scripts/basic/ and scripts/mod/modpost. 76 "${MAKE}" HOSTCC="${CC}" KBUILD_EXTMOD="${destdir}" scripts/ 77 78 rm -f "${destdir}/Kbuild" "${destdir}/scripts/Kbuild" 79fi 80 81find "${destdir}" \( -name '.*.cmd' -o -name '*.o' \) -delete 82