Commit | Line | Data |
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43d8ce9d JFG |
1 | #!/bin/bash |
2 | # SPDX-License-Identifier: GPL-2.0 | |
3 | ||
4 | # This script generates an archive consisting of kernel headers | |
f7b101d3 | 5 | # for CONFIG_IKHEADERS. |
43d8ce9d | 6 | set -e |
7199ff7d | 7 | sfile="$(readlink -f "$0")" |
43d8ce9d JFG |
8 | outdir="$(pwd)" |
9 | tarfile=$1 | |
10 | cpio_dir=$outdir/$tarfile.tmp | |
11 | ||
7199ff7d | 12 | dir_list=" |
43d8ce9d JFG |
13 | include/ |
14 | arch/$SRCARCH/include/ | |
15 | " | |
16 | ||
17 | # Support incremental builds by skipping archive generation | |
18 | # if timestamps of files being archived are not changed. | |
19 | ||
20 | # This block is useful for debugging the incremental builds. | |
21 | # Uncomment it for debugging. | |
1457dc9e JFG |
22 | # if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter; |
23 | # else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi | |
7199ff7d MY |
24 | # find $src_file_list -name "*.h" | xargs ls -l > /tmp/src-ls-$iter |
25 | # find $obj_file_list -name "*.h" | xargs ls -l > /tmp/obj-ls-$iter | |
43d8ce9d JFG |
26 | |
27 | # include/generated/compile.h is ignored because it is touched even when none | |
28 | # of the source files changed. This causes pointless regeneration, so let us | |
29 | # ignore them for md5 calculation. | |
7199ff7d MY |
30 | pushd $srctree > /dev/null |
31 | src_files_md5="$(find $dir_list -name "*.h" | | |
43d8ce9d | 32 | grep -v "include/generated/compile.h" | |
1457dc9e | 33 | grep -v "include/generated/autoconf.h" | |
b60b7c2e | 34 | xargs ls -l | md5sum | cut -d ' ' -f1)" |
43d8ce9d | 35 | popd > /dev/null |
7199ff7d | 36 | obj_files_md5="$(find $dir_list -name "*.h" | |
43d8ce9d | 37 | grep -v "include/generated/compile.h" | |
1457dc9e | 38 | grep -v "include/generated/autoconf.h" | |
b60b7c2e | 39 | xargs ls -l | md5sum | cut -d ' ' -f1)" |
7199ff7d MY |
40 | # Any changes to this script will also cause a rebuild of the archive. |
41 | this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)" | |
43d8ce9d JFG |
42 | if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi |
43 | if [ -f kernel/kheaders.md5 ] && | |
44 | [ "$(cat kernel/kheaders.md5|head -1)" == "$src_files_md5" ] && | |
45 | [ "$(cat kernel/kheaders.md5|head -2|tail -1)" == "$obj_files_md5" ] && | |
7199ff7d | 46 | [ "$(cat kernel/kheaders.md5|head -3|tail -1)" == "$this_file_md5" ] && |
43d8ce9d JFG |
47 | [ "$(cat kernel/kheaders.md5|tail -1)" == "$tarfile_md5" ]; then |
48 | exit | |
49 | fi | |
50 | ||
51 | if [ "${quiet}" != "silent_" ]; then | |
52 | echo " GEN $tarfile" | |
53 | fi | |
54 | ||
55 | rm -rf $cpio_dir | |
56 | mkdir $cpio_dir | |
57 | ||
7199ff7d MY |
58 | pushd $srctree > /dev/null |
59 | for f in $dir_list; | |
60 | do find "$f" -name "*.h"; | |
43d8ce9d JFG |
61 | done | cpio --quiet -pd $cpio_dir |
62 | popd > /dev/null | |
63 | ||
64 | # The second CPIO can complain if files already exist which can | |
65 | # happen with out of tree builds. Just silence CPIO for now. | |
7199ff7d MY |
66 | for f in $dir_list; |
67 | do find "$f" -name "*.h"; | |
43d8ce9d JFG |
68 | done | cpio --quiet -pd $cpio_dir >/dev/null 2>&1 |
69 | ||
70 | # Remove comments except SDPX lines | |
71 | find $cpio_dir -type f -print0 | | |
72 | xargs -0 -P8 -n1 perl -pi -e 'BEGIN {undef $/;}; s/\/\*((?!SPDX).)*?\*\///smg;' | |
73 | ||
74 | tar -Jcf $tarfile -C $cpio_dir/ . > /dev/null | |
75 | ||
1457dc9e | 76 | echo "$src_files_md5" > kernel/kheaders.md5 |
43d8ce9d | 77 | echo "$obj_files_md5" >> kernel/kheaders.md5 |
7199ff7d | 78 | echo "$this_file_md5" >> kernel/kheaders.md5 |
43d8ce9d JFG |
79 | echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5 |
80 | ||
81 | rm -rf $cpio_dir |