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73d210e9fa
Commit 86cdd2fdc4 ("kheaders: make headers archive reproducible")
introduced a number of options specific to GNU tar to the `tar`
invocation in `gen_kheaders.sh` script. This causes the script to fail
to work on systems where `tar` is not GNU tar. This can occur e.g.
on recent Gentoo Linux installations that support using bsdtar from
libarchive instead.
Add a `TAR` make variable to make it possible to override the tar
executable used, e.g. by specifying:
make TAR=gtar
Link: https://bugs.gentoo.org/884061
Reported-by: Sam James <sam@gentoo.org>
Tested-by: Sam James <sam@gentoo.org>
Co-developed-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Michał Górny <mgorny@gentoo.org>
Signed-off-by: Sam James <sam@gentoo.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
50 lines
1.4 KiB
Bash
Executable file
50 lines
1.4 KiB
Bash
Executable file
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# This script generates an archive consisting of kernel headers
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# for CONFIG_IKHEADERS.
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set -e
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tarfile=$1
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srclist=$2
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objlist=$3
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timestamp=$4
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dir=$(dirname "${tarfile}")
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tmpdir=${dir}/.tmp_dir
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depfile=${dir}/.$(basename "${tarfile}").d
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# generate dependency list.
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{
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echo
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echo "deps_${tarfile} := \\"
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sed 's:\(.*\): \1 \\:' "${srclist}"
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sed -n '/^include\/generated\/autoconf\.h$/!s:\(.*\): \1 \\:p' "${objlist}"
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echo
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echo "${tarfile}: \$(deps_${tarfile})"
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echo
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echo "\$(deps_${tarfile}):"
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} > "${depfile}"
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rm -rf "${tmpdir}"
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mkdir "${tmpdir}"
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# shellcheck disable=SC2154 # srctree is passed as an env variable
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sed "s:^${srctree}/::" "${srclist}" | ${TAR} -c -f - -C "${srctree}" -T - | ${TAR} -xf - -C "${tmpdir}"
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${TAR} -c -f - -T "${objlist}" | ${TAR} -xf - -C "${tmpdir}"
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# Remove comments except SDPX lines
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# Use a temporary file to store directory contents to prevent find/xargs from
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# seeing temporary files created by perl.
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find "${tmpdir}" -type f -print0 > "${tmpdir}.contents.txt"
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xargs -0 -P8 -n1 \
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perl -pi -e 'BEGIN {undef $/;}; s/\/\*((?!SPDX).)*?\*\///smg;' \
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< "${tmpdir}.contents.txt"
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rm -f "${tmpdir}.contents.txt"
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# Create archive and try to normalize metadata for reproducibility.
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${TAR} "${timestamp:+--mtime=$timestamp}" \
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--owner=0 --group=0 --sort=name --numeric-owner --mode=u=rw,go=r,a+X \
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-I "${XZ}" -cf "${tarfile}" -C "${tmpdir}/" . > /dev/null
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rm -rf "${tmpdir}"
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