1 #!/bin/sh 1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0 2 # SPDX-License-Identifier: GPL-2.0
3 3
4 # This script generates an archive consisting 4 # This script generates an archive consisting of kernel headers
5 # for CONFIG_IKHEADERS. 5 # for CONFIG_IKHEADERS.
6 set -e 6 set -e
7 sfile="$(readlink -f "$0")" 7 sfile="$(readlink -f "$0")"
8 outdir="$(pwd)" 8 outdir="$(pwd)"
9 tarfile=$1 9 tarfile=$1
10 cpio_dir=$outdir/${tarfile%/*}/.tmp_cpio_dir !! 10 cpio_dir=$outdir/$tarfile.tmp
11 11
12 dir_list=" 12 dir_list="
13 include/ 13 include/
14 arch/$SRCARCH/include/ 14 arch/$SRCARCH/include/
15 " 15 "
16 16
17 if ! command -v cpio >/dev/null; then <<
18 echo >&2 "***" <<
19 echo >&2 "*** 'cpio' could not be foun <<
20 echo >&2 "***" <<
21 exit 1 <<
22 fi <<
23 <<
24 # Support incremental builds by skipping archi 17 # Support incremental builds by skipping archive generation
25 # if timestamps of files being archived are no 18 # if timestamps of files being archived are not changed.
26 19
27 # This block is useful for debugging the incre 20 # This block is useful for debugging the incremental builds.
28 # Uncomment it for debugging. 21 # Uncomment it for debugging.
29 # if [ ! -f /tmp/iter ]; then iter=1; echo 1 > 22 # if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter;
30 # else iter=$(($(cat /tmp/iter) + 1)); echo $i 23 # else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi
31 # find $all_dirs -name "*.h" | xargs ls -l > / 24 # find $all_dirs -name "*.h" | xargs ls -l > /tmp/ls-$iter
32 25
33 all_dirs= 26 all_dirs=
34 if [ "$building_out_of_srctree" ]; then 27 if [ "$building_out_of_srctree" ]; then
35 for d in $dir_list; do 28 for d in $dir_list; do
36 all_dirs="$all_dirs $srctree/$ 29 all_dirs="$all_dirs $srctree/$d"
37 done 30 done
38 fi 31 fi
39 all_dirs="$all_dirs $dir_list" 32 all_dirs="$all_dirs $dir_list"
40 33
41 # include/generated/utsversion.h is ignored be !! 34 # include/generated/compile.h is ignored because it is touched even when none
42 # script is executed. (utsversion.h is unneede !! 35 # of the source files changed.
43 # 36 #
44 # When Kconfig regenerates include/generated/a 37 # When Kconfig regenerates include/generated/autoconf.h, its timestamp is
45 # updated, but the contents might be still the 38 # updated, but the contents might be still the same. When any CONFIG option is
46 # changed, Kconfig touches the corresponding t 39 # changed, Kconfig touches the corresponding timestamp file include/config/*.
47 # Hence, the md5sum detects the configuration 40 # Hence, the md5sum detects the configuration change anyway. We do not need to
48 # check include/generated/autoconf.h explicitl 41 # check include/generated/autoconf.h explicitly.
49 # 42 #
50 # Ignore them for md5 calculation to avoid poi 43 # Ignore them for md5 calculation to avoid pointless regeneration.
51 headers_md5="$(find $all_dirs -name "*.h" 44 headers_md5="$(find $all_dirs -name "*.h" |
52 grep -v "include/generated/uts !! 45 grep -v "include/generated/compile.h" |
53 grep -v "include/generated/aut 46 grep -v "include/generated/autoconf.h" |
54 xargs ls -l | md5sum | cut -d 47 xargs ls -l | md5sum | cut -d ' ' -f1)"
55 48
56 # Any changes to this script will also cause a 49 # Any changes to this script will also cause a rebuild of the archive.
57 this_file_md5="$(ls -l $sfile | md5sum | cut - 50 this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)"
58 if [ -f $tarfile ]; then tarfile_md5="$(md5sum 51 if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi
59 if [ -f kernel/kheaders.md5 ] && 52 if [ -f kernel/kheaders.md5 ] &&
60 [ "$(head -n 1 kernel/kheaders.md5)" = 53 [ "$(head -n 1 kernel/kheaders.md5)" = "$headers_md5" ] &&
61 [ "$(head -n 2 kernel/kheaders.md5 | t 54 [ "$(head -n 2 kernel/kheaders.md5 | tail -n 1)" = "$this_file_md5" ] &&
62 [ "$(tail -n 1 kernel/kheaders.md5)" = 55 [ "$(tail -n 1 kernel/kheaders.md5)" = "$tarfile_md5" ]; then
63 exit 56 exit
64 fi 57 fi
65 58
66 echo " GEN $tarfile" 59 echo " GEN $tarfile"
67 60
68 rm -rf $cpio_dir 61 rm -rf $cpio_dir
69 mkdir $cpio_dir 62 mkdir $cpio_dir
70 63
71 if [ "$building_out_of_srctree" ]; then 64 if [ "$building_out_of_srctree" ]; then
72 ( 65 (
73 cd $srctree 66 cd $srctree
74 for f in $dir_list 67 for f in $dir_list
75 do find "$f" -name "*. 68 do find "$f" -name "*.h";
76 done | cpio --quiet -pd $cpio_ 69 done | cpio --quiet -pd $cpio_dir
77 ) 70 )
78 fi 71 fi
79 72
80 # The second CPIO can complain if files alread 73 # The second CPIO can complain if files already exist which can happen with out
81 # of tree builds having stale headers in srctr 74 # of tree builds having stale headers in srctree. Just silence CPIO for now.
82 for f in $dir_list; 75 for f in $dir_list;
83 do find "$f" -name "*.h"; 76 do find "$f" -name "*.h";
84 done | cpio --quiet -pdu $cpio_dir >/dev/null 77 done | cpio --quiet -pdu $cpio_dir >/dev/null 2>&1
85 78
86 # Remove comments except SDPX lines 79 # Remove comments except SDPX lines
87 find $cpio_dir -type f -print0 | 80 find $cpio_dir -type f -print0 |
88 xargs -0 -P8 -n1 perl -pi -e 'BEGIN {u 81 xargs -0 -P8 -n1 perl -pi -e 'BEGIN {undef $/;}; s/\/\*((?!SPDX).)*?\*\///smg;'
89 82
90 # Create archive and try to normalize metadata 83 # Create archive and try to normalize metadata for reproducibility.
91 tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD !! 84 # For compatibility with older versions of tar, files are fed to tar
92 --owner=0 --group=0 --sort=name --numeric- !! 85 # pre-sorted, as --sort=name might not be available.
93 -I $XZ -cf $tarfile -C $cpio_dir/ . > /dev !! 86 find $cpio_dir -printf "./%P\n" | LC_ALL=C sort | \
>> 87 tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD_BUILD_TIMESTAMP}" \
>> 88 --owner=0 --group=0 --numeric-owner --no-recursion \
>> 89 -I $XZ -cf $tarfile -C $cpio_dir/ -T - > /dev/null
94 90
95 echo $headers_md5 > kernel/kheaders.md5 91 echo $headers_md5 > kernel/kheaders.md5
96 echo "$this_file_md5" >> kernel/kheaders.md5 92 echo "$this_file_md5" >> kernel/kheaders.md5
97 echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> 93 echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5
98 94
99 rm -rf $cpio_dir 95 rm -rf $cpio_dir
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