1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0-only
3
4 set -eu
5
6 destdir=${1}
7
8 is_enabled() {
9 grep -q "^$1=y" include/config/auto.conf
10 }
11
12 find_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
18 mkdir -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 ${CC}.
48 #
49 # This caters to host programs that participate in Kbuild. objtool and
50 # resolve_btfids are out of scope.
51 if [ "${CC}" != "${HOSTCC}" ]; then
52 echo "Rebuilding host programs with ${CC}..."
53
54 cat <<-'EOF' > "${destdir}/Kbuild"
55 subdir-y := scripts
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 # Use the single-target build to avoid the modpost invocation, which
64 # would overwrite Module.symvers.
65 "${MAKE}" HOSTCC="${CC}" KBUILD_EXTMOD="${destdir}" scripts/
66
67 cat <<-'EOF' > "${destdir}/scripts/Kbuild"
68 subdir-y := basic
69 hostprogs-always-y := mod/modpost
70 mod/modpost-objs := $(addprefix mod/, modpost.o file2alias.o sumversion.o symsearch.o)
71 EOF
72
73 # Run once again to rebuild scripts/basic/ and scripts/mod/modpost.
74 "${MAKE}" HOSTCC="${CC}" KBUILD_EXTMOD="${destdir}" scripts/
75
76 rm -f "${destdir}/Kbuild" "${destdir}/scripts/Kbuild"
77 fi
78
79 find "${destdir}" \( -name '.*.cmd' -o -name '*.o' \) -delete
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