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/${tarfile%/*}/.tmp_cpio_dir
11 11
12 dir_list=" 12 dir_list="
13 include/ 13 include/
14 arch/$SRCARCH/include/ 14 arch/$SRCARCH/include/
15 " 15 "
16 16
17 if ! command -v cpio >/dev/null; then !! 17 type cpio > /dev/null
18 echo >&2 "***" <<
19 echo >&2 "*** 'cpio' could not be foun <<
20 echo >&2 "***" <<
21 exit 1 <<
22 fi <<
23 18
24 # Support incremental builds by skipping archi 19 # Support incremental builds by skipping archive generation
25 # if timestamps of files being archived are no 20 # if timestamps of files being archived are not changed.
26 21
27 # This block is useful for debugging the incre 22 # This block is useful for debugging the incremental builds.
28 # Uncomment it for debugging. 23 # Uncomment it for debugging.
29 # if [ ! -f /tmp/iter ]; then iter=1; echo 1 > 24 # if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter;
30 # else iter=$(($(cat /tmp/iter) + 1)); echo $i 25 # else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi
31 # find $all_dirs -name "*.h" | xargs ls -l > / 26 # find $all_dirs -name "*.h" | xargs ls -l > /tmp/ls-$iter
32 27
33 all_dirs= 28 all_dirs=
34 if [ "$building_out_of_srctree" ]; then 29 if [ "$building_out_of_srctree" ]; then
35 for d in $dir_list; do 30 for d in $dir_list; do
36 all_dirs="$all_dirs $srctree/$ 31 all_dirs="$all_dirs $srctree/$d"
37 done 32 done
38 fi 33 fi
39 all_dirs="$all_dirs $dir_list" 34 all_dirs="$all_dirs $dir_list"
40 35
41 # include/generated/utsversion.h is ignored be 36 # include/generated/utsversion.h is ignored because it is generated after this
42 # script is executed. (utsversion.h is unneede 37 # script is executed. (utsversion.h is unneeded for kheaders)
43 # 38 #
44 # When Kconfig regenerates include/generated/a 39 # When Kconfig regenerates include/generated/autoconf.h, its timestamp is
45 # updated, but the contents might be still the 40 # updated, but the contents might be still the same. When any CONFIG option is
46 # changed, Kconfig touches the corresponding t 41 # changed, Kconfig touches the corresponding timestamp file include/config/*.
47 # Hence, the md5sum detects the configuration 42 # Hence, the md5sum detects the configuration change anyway. We do not need to
48 # check include/generated/autoconf.h explicitl 43 # check include/generated/autoconf.h explicitly.
49 # 44 #
50 # Ignore them for md5 calculation to avoid poi 45 # Ignore them for md5 calculation to avoid pointless regeneration.
51 headers_md5="$(find $all_dirs -name "*.h" 46 headers_md5="$(find $all_dirs -name "*.h" |
52 grep -v "include/generated/uts 47 grep -v "include/generated/utsversion.h" |
53 grep -v "include/generated/aut 48 grep -v "include/generated/autoconf.h" |
54 xargs ls -l | md5sum | cut -d 49 xargs ls -l | md5sum | cut -d ' ' -f1)"
55 50
56 # Any changes to this script will also cause a 51 # Any changes to this script will also cause a rebuild of the archive.
57 this_file_md5="$(ls -l $sfile | md5sum | cut - 52 this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)"
58 if [ -f $tarfile ]; then tarfile_md5="$(md5sum 53 if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi
59 if [ -f kernel/kheaders.md5 ] && 54 if [ -f kernel/kheaders.md5 ] &&
60 [ "$(head -n 1 kernel/kheaders.md5)" = 55 [ "$(head -n 1 kernel/kheaders.md5)" = "$headers_md5" ] &&
61 [ "$(head -n 2 kernel/kheaders.md5 | t 56 [ "$(head -n 2 kernel/kheaders.md5 | tail -n 1)" = "$this_file_md5" ] &&
62 [ "$(tail -n 1 kernel/kheaders.md5)" = 57 [ "$(tail -n 1 kernel/kheaders.md5)" = "$tarfile_md5" ]; then
63 exit 58 exit
64 fi 59 fi
65 60
66 echo " GEN $tarfile" 61 echo " GEN $tarfile"
67 62
68 rm -rf $cpio_dir 63 rm -rf $cpio_dir
69 mkdir $cpio_dir 64 mkdir $cpio_dir
70 65
71 if [ "$building_out_of_srctree" ]; then 66 if [ "$building_out_of_srctree" ]; then
72 ( 67 (
73 cd $srctree 68 cd $srctree
74 for f in $dir_list 69 for f in $dir_list
75 do find "$f" -name "*. 70 do find "$f" -name "*.h";
76 done | cpio --quiet -pd $cpio_ 71 done | cpio --quiet -pd $cpio_dir
77 ) 72 )
78 fi 73 fi
79 74
80 # The second CPIO can complain if files alread 75 # The second CPIO can complain if files already exist which can happen with out
81 # of tree builds having stale headers in srctr 76 # of tree builds having stale headers in srctree. Just silence CPIO for now.
82 for f in $dir_list; 77 for f in $dir_list;
83 do find "$f" -name "*.h"; 78 do find "$f" -name "*.h";
84 done | cpio --quiet -pdu $cpio_dir >/dev/null 79 done | cpio --quiet -pdu $cpio_dir >/dev/null 2>&1
85 80
86 # Remove comments except SDPX lines 81 # Remove comments except SDPX lines
87 find $cpio_dir -type f -print0 | 82 find $cpio_dir -type f -print0 |
88 xargs -0 -P8 -n1 perl -pi -e 'BEGIN {u 83 xargs -0 -P8 -n1 perl -pi -e 'BEGIN {undef $/;}; s/\/\*((?!SPDX).)*?\*\///smg;'
89 84
90 # Create archive and try to normalize metadata 85 # Create archive and try to normalize metadata for reproducibility.
91 tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD 86 tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD_BUILD_TIMESTAMP}" \
92 --owner=0 --group=0 --sort=name --numeric- !! 87 --owner=0 --group=0 --sort=name --numeric-owner \
93 -I $XZ -cf $tarfile -C $cpio_dir/ . > /dev 88 -I $XZ -cf $tarfile -C $cpio_dir/ . > /dev/null
94 89
95 echo $headers_md5 > kernel/kheaders.md5 90 echo $headers_md5 > kernel/kheaders.md5
96 echo "$this_file_md5" >> kernel/kheaders.md5 91 echo "$this_file_md5" >> kernel/kheaders.md5
97 echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> 92 echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5
98 93
99 rm -rf $cpio_dir 94 rm -rf $cpio_dir
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