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classes/kernel: Generate reproducible kernel module tarball

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If reproducible binaries are requested, generate the kernel modules
tarball in a reproducible way. Namely, sort the tarball contents, clamp
the mtime to the source date epoch, compress the archive with a
consistent compression level (9), and don't include the name and
timestamp in the compressed file.

[YOCTO #12719]

(From OE-Core rev: 5c6a472c82a9b3c122fc54d3ee7171508c643a8b)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Joshua Watt
2020-05-12 16:19:24 -05:00
committed by Richard Purdie
parent 81da240a5f
commit 54865c7c1e
1 changed files with 7 additions and 1 deletions
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8
meta/classes/kernel.bbclass
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@@ -691,7 +691,13 @@ kernel_do_deploy() {
if [ ${MODULE_TARBALL_DEPLOY} = "1" ] && (grep -q -i -e '^CONFIG_MODULES=y$' .config); then
mkdir -p ${D}${root_prefix}/lib
tar -cvzf $deployDir/modules-${MODULE_TARBALL_NAME}.tgz -C ${D}${root_prefix} lib
if [ -n "${SOURCE_DATE_EPOCH}" ]; then
TAR_ARGS="--sort=name --clamp-mtime --mtime=@${SOURCE_DATE_EPOCH}"
else
TAR_ARGS=""
fi
tar $TAR_ARGS -cv -C ${D}${root_prefix} lib | gzip -9n > $deployDir/modules-${MODULE_TARBALL_NAME}.tgz
ln -sf modules-${MODULE_TARBALL_NAME}.tgz $deployDir/modules-${MODULE_TARBALL_LINK_NAME}.tgz
fi