[gentoo-dev] [PATCH 7/8] kernel-build.eclass: use pigz for parallel compression if available

[Sam James]

Note that this will only take effect if compressing modules with gzip
(COMPRESS_MODULE_GZIP is set) or compressing the kernel with gzip
(CONFIG_KERNEL_GZIP is set).

Signed-off-by: Sam James <sam@g.o>
---
 eclass/kernel-build.eclass | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/eclass/kernel-build.eclass b/eclass/kernel-build.eclass
index 936258e9e8af..faf36d763d08 100644
--- a/eclass/kernel-build.eclass
+++ b/eclass/kernel-build.eclass
@@ -98,6 +98,13 @@ 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
+	# uses the variables (e.g. passes directly to tar as an executable).
+	if type -P pigz ; then
+		MAKEARGS+=( KGZIP="pigz" )
+	fi
+
 	restore_config .config
 	[[ -f .config ]] || die "Ebuild error: please copy default config into .config"
 
-- 
2.38.0