fa9645687e
When the kernel is built inside a sandbox container,
a forest of symlinks to the source files may be
created in the container. In this case, the generated
kheaders.tar.xz should follow these symlinks
to access the source files, instead of packing
the symlinks themselves.
Test: manual (add kheaders_data.tar.xz to the output,
then examine the contents)
Bug: 276339429
Fixes: b0acbba3f489 ("Revert "Revert "Revert "FROMLIST: kheaders: Follow symlinks to source files."""")
Link: https://lore.kernel.org/lkml/20230420010029.2702543-1-elsk@google.com/
Signed-off-by: Yifan Hong <elsk@google.com>
(cherry picked from https://android-review.googlesource.com/q/commit:28fa7afc424f3dc53358c0e9b080433d78f0cd54)
Merged-In: Ie4db22dfa13d05fdccb3ad8f4fae2fe3fead994e
Change-Id: Ie4db22dfa13d05fdccb3ad8f4fae2fe3fead994e
96 lines
3.2 KiB
Bash
Executable File
96 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
# This script generates an archive consisting of kernel headers
|
|
# for CONFIG_IKHEADERS.
|
|
set -e
|
|
sfile="$(readlink -f "$0")"
|
|
outdir="$(pwd)"
|
|
tarfile=$1
|
|
cpio_dir=$outdir/$tarfile.tmp
|
|
|
|
dir_list="
|
|
include/
|
|
arch/$SRCARCH/include/
|
|
"
|
|
|
|
# Support incremental builds by skipping archive generation
|
|
# if timestamps of files being archived are not changed.
|
|
|
|
# This block is useful for debugging the incremental builds.
|
|
# Uncomment it for debugging.
|
|
# if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter;
|
|
# else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi
|
|
# find $all_dirs -name "*.h" | xargs ls -l > /tmp/ls-$iter
|
|
|
|
all_dirs=
|
|
if [ "$building_out_of_srctree" ]; then
|
|
for d in $dir_list; do
|
|
all_dirs="$all_dirs $srctree/$d"
|
|
done
|
|
fi
|
|
all_dirs="$all_dirs $dir_list"
|
|
|
|
# include/generated/utsversion.h is ignored because it is generated after this
|
|
# script is executed. (utsversion.h is unneeded for kheaders)
|
|
#
|
|
# When Kconfig regenerates include/generated/autoconf.h, its timestamp is
|
|
# updated, but the contents might be still the same. When any CONFIG option is
|
|
# changed, Kconfig touches the corresponding timestamp file include/config/*.
|
|
# Hence, the md5sum detects the configuration change anyway. We do not need to
|
|
# check include/generated/autoconf.h explicitly.
|
|
#
|
|
# Ignore them for md5 calculation to avoid pointless regeneration.
|
|
headers_md5="$(find $all_dirs -name "*.h" |
|
|
grep -v "include/generated/utsversion.h" |
|
|
grep -v "include/generated/autoconf.h" |
|
|
xargs ls -l | md5sum | cut -d ' ' -f1)"
|
|
|
|
# Any changes to this script will also cause a rebuild of the archive.
|
|
this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)"
|
|
if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi
|
|
if [ -f kernel/kheaders.md5 ] &&
|
|
[ "$(head -n 1 kernel/kheaders.md5)" = "$headers_md5" ] &&
|
|
[ "$(head -n 2 kernel/kheaders.md5 | tail -n 1)" = "$this_file_md5" ] &&
|
|
[ "$(tail -n 1 kernel/kheaders.md5)" = "$tarfile_md5" ]; then
|
|
exit
|
|
fi
|
|
|
|
echo " GEN $tarfile"
|
|
|
|
rm -rf $cpio_dir
|
|
mkdir $cpio_dir
|
|
|
|
if [ "$building_out_of_srctree" ]; then
|
|
(
|
|
cd $srctree
|
|
for f in $dir_list
|
|
do find "$f" -name "*.h";
|
|
done | cpio --quiet -L -pd $cpio_dir
|
|
)
|
|
fi
|
|
|
|
# The second CPIO can complain if files already exist which can happen with out
|
|
# of tree builds having stale headers in srctree. Just silence CPIO for now.
|
|
for f in $dir_list;
|
|
do find "$f" -name "*.h";
|
|
done | cpio --quiet -L -pdu $cpio_dir >/dev/null 2>&1
|
|
|
|
# Remove comments except SDPX lines
|
|
find $cpio_dir -type f -print0 |
|
|
xargs -0 -P8 -n1 perl -pi -e 'BEGIN {undef $/;}; s/\/\*((?!SPDX).)*?\*\///smg;'
|
|
|
|
# Create archive and try to normalize metadata for reproducibility.
|
|
# For compatibility with older versions of tar, files are fed to tar
|
|
# pre-sorted, as --sort=name might not be available.
|
|
find $cpio_dir -printf "./%P\n" | LC_ALL=C sort | \
|
|
tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD_BUILD_TIMESTAMP}" \
|
|
--owner=0 --group=0 --numeric-owner --no-recursion \
|
|
-I $XZ -cf $tarfile -C $cpio_dir/ -T - > /dev/null
|
|
|
|
echo $headers_md5 > kernel/kheaders.md5
|
|
echo "$this_file_md5" >> kernel/kheaders.md5
|
|
echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5
|
|
|
|
rm -rf $cpio_dir
|