[gentoo-dev] [PATCH 8/8] kernel-build.eclass: use pbzip2/lbzip2 for parallel compression if available

[Sam James <sam@gentoo.org>]

Note that this will only take effect if compressing
modules with bzip2 (COMPRESS_MODULE_BZIP2 is set) or
compressing the kernel with bzip2 (CONFIG_KERNEL_BZIP2 is set).

Signed-off-by: Sam James <sam@gentoo.org>
---
 eclass/kernel-build.eclass | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/eclass/kernel-build.eclass b/eclass/kernel-build.eclass
index faf36d763d08..cc99298811bc 100644
--- a/eclass/kernel-build.eclass
+++ b/eclass/kernel-build.eclass
@@ -98,13 +98,19 @@ kernel-build_src_configure() {
 		export ZSTD_NBTHREADS="$(makeopts_jobs)"
 	fi
 
-	# pigz needs to take an argument, not an env var,
-	# for its options, which won't work because of how the kernel build system
+	# pigz/pbzip2/lbzip2 all need to take an argument, not an env var,
+	# for their options, which won't work because of how the kernel build system
 	# uses the variables (e.g. passes directly to tar as an executable).
 	if type -P pigz ; then
 		MAKEARGS+=( KGZIP="pigz" )
 	fi
 
+	if type -P pbzip2 ; then
+		MAKEARGS+=( KBZIP2="pbzip2" )
+	elif type -P lbzip2 ; then
+		MAKEARGS+=( KBZIP2="lbzip2" )
+	fi
+
 	restore_config .config
 	[[ -f .config ]] || die "Ebuild error: please copy default config into .config"
 
-- 
2.38.0