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linux-mod.eclass: Support module compression

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The Linux kernel supports the compression of modules utilizing GZIP, XZ
and ZSTD.  Add support into linux-mod.eclass to support this for out of
tree modules utilizing the compression binary specified in the kernel
config.

Note that if the binary which provides the compression is not present on
the system the kernel would have failed to build with an error
indicating the missing binaries name.

Closes: https://bugs.gentoo.org/850130

Signed-off-by: Mike Pagano <mpagano@gentoo.org>
This commit is contained in:
Mike Pagano
2022-06-11 14:59:34 -04:00
parent 8289ed0d0a
commit eee74b9fca
1 changed files with 16 additions and 1 deletions
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17
eclass/linux-mod.eclass
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@@ -711,7 +711,22 @@ linux-mod_src_install() {
einfo "Installing ${modulename} module"
cd "${objdir}" || die "${objdir} does not exist"
insinto "${INSTALL_MOD_PATH}"/lib/modules/${KV_FULL}/${libdir}
doins ${modulename}.${KV_OBJ} || die "doins ${modulename}.${KV_OBJ} failed"
# check here for CONFIG_MODULE_COMPRESS_<compression option> (NONE, GZIP, XZ, ZSTD)
# and similarily compress the module being built if != NONE.
if linux_chkconfig_present MODULE_COMPRESS_XZ; then
xz ${modulename}.${KV_OBJ}
doins ${modulename}.${KV_OBJ}.xz || die "doins ${modulename}.${KV_OBJ}.xz failed"
elif linux_chkconfig_present MODULE_COMPRESS_GZIP; then
gzip ${modulename}.${KV_OBJ}
doins ${modulename}.${KV_OBJ}.gz || die "doins ${modulename}.${KV_OBJ}.gz failed"
elif linux_chkconfig_present MODULE_COMPRESS_ZSTD; then
zstd ${modulename}.${KV_OBJ}
doins ${modulename}.${KV_OBJ}.zst || die "doins ${modulename}.${KV_OBJ}.zst failed"
else
doins ${modulename}.${KV_OBJ} || die "doins ${modulename}.${KV_OBJ} failed"
fi
cd "${OLDPWD}"
generate_modulesd "${objdir}/${modulename}"