| | 1 | #!/bin/bash |
| | 2 | # SPDX-License-Identifier: GPL-2.0 |
| | 3 | |
| | 4 | # This script generates an archive consisting of kernel headers |
| | 5 | # for CONFIG_IKHEADERS. |
| | 6 | set -e |
| | 7 | sfile="$(readlink -f "$0")" |
| | 8 | outdir="$(pwd)" |
| | 9 | tarfile=$1 |
| | 10 | cpio_dir=$outdir/$tarfile.tmp |
| | 11 | |
| | 12 | dir_list=" |
| | 13 | include/ |
| | 14 | arch/$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. |
| | 22 | # if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter; |
| | 23 | # else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi |
| | 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 |
| | 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. |
| | 30 | pushd $srctree > /dev/null |
| | 31 | src_files_md5="$(find $dir_list -name "*.h" | |
| | 32 | grep -v "include/generated/compile.h" | |
| | 33 | grep -v "include/generated/autoconf.h" | |
| | 34 | xargs ls -l | md5sum | cut -d ' ' -f1)" |
| | 35 | popd > /dev/null |
| | 36 | obj_files_md5="$(find $dir_list -name "*.h" | |
| | 37 | grep -v "include/generated/compile.h" | |
| | 38 | grep -v "include/generated/autoconf.h" | |
| | 39 | xargs ls -l | md5sum | cut -d ' ' -f1)" |
| | 40 | # Any changes to this script will also cause a rebuild of the archive. |
| | 41 | this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)" |
| | 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)" == "$obj_files_md5" ] && |
| | 46 | [ "$(cat kernel/kheaders.md5|head -3|tail -1)" == "$this_file_md5" ] && |
| | 47 | [ "$(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 | |
| | 58 | pushd $srctree > /dev/null |
| | 59 | for f in $dir_list; |
| | 60 | do find "$f" -name "*.h"; |
| | 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. |
| | 66 | for f in $dir_list; |
| | 67 | do find "$f" -name "*.h"; |
| | 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 $/;}; s/\/\*((?!SPDX).)*?\*\///smg;' |
| | 73 | |
| | 74 | # Create archive and try to normalize metadata for reproducibility |
| | 75 | tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD_BUILD_TIMESTAMP}" \ |
| | 76 | --owner=0 --group=0 --sort=name --numeric-owner \ |
| | 77 | -Jcf $tarfile -C $cpio_dir/ . > /dev/null |
| | 78 | |
| | 79 | echo "$src_files_md5" > kernel/kheaders.md5 |
| | 80 | echo "$obj_files_md5" >> kernel/kheaders.md5 |
| | 81 | echo "$this_file_md5" >> kernel/kheaders.md5 |
| | 82 | echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5 |
| | 83 | |
| | 84 | rm -rf $cpio_dir |
projects / linux-2.6-block.git / blame_incremental