[OE-core] [PATCH][for-denzil 7/8] image_types.bbclass: Add XZ variable to set number of threads to be used while compressing

[Koen Kooi]

From: Andrei Gherzan <andrei at gherzan.ro>

Default this variable to 0. This will make xz use as many threads as there are CPU
cores on the system.

Signed-off-by: Koen Kooi <koen at dominion.thruhere.net>
Signed-off-by: Andrei Gherzan <andrei at gherzan.ro>
Signed-off-by: Saul Wold <sgw at linux.intel.com>
---
 meta/classes/image_types.bbclass |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
index 007c8a5..258be63 100644
--- a/meta/classes/image_types.bbclass
+++ b/meta/classes/image_types.bbclass
@@ -118,6 +118,7 @@ def imagetypes_getdepends(d):
 
 XZ_COMPRESSION_LEVEL ?= "-e -9"
 XZ_INTEGRITY_CHECK ?= "crc32"
+XZ_THREADS ?= "-T 0"
 
 IMAGE_CMD_jffs2 = "mkfs.jffs2 --root=${IMAGE_ROOTFS} --faketime --output=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.jffs2 -n ${EXTRA_IMAGECMD}"
 IMAGE_CMD_sum.jffs2 = "${IMAGE_CMD_jffs2} && sumtool -i ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.jffs2 \
@@ -215,7 +216,7 @@ COMPRESSIONTYPES = "gz bz2 lzma xz"
 COMPRESS_CMD_lzma = "lzma -k -f -7 ${IMAGE_NAME}.rootfs.${type}"
 COMPRESS_CMD_gz = "gzip -f -9 -c ${IMAGE_NAME}.rootfs.${type} > ${IMAGE_NAME}.rootfs.${type}.gz"
 COMPRESS_CMD_bz2 = "bzip2 -f -k ${IMAGE_NAME}.rootfs.${type}"
-COMPRESS_CMD_xz = "xz -f -k -c ${XZ_COMPRESSION_LEVEL} --check=${XZ_INTEGRITY_CHECK} ${IMAGE_NAME}.rootfs.${type} > ${IMAGE_NAME}.rootfs.${type}.xz"
+COMPRESS_CMD_xz = "xz -f -k -c ${XZ_COMPRESSION_LEVEL} ${XZ_THREADS} --check=${XZ_INTEGRITY_CHECK} ${IMAGE_NAME}.rootfs.${type} > ${IMAGE_NAME}.rootfs.${type}.xz"
 COMPRESS_DEPENDS_lzma = "xz-native"
 COMPRESS_DEPENDS_gz = ""
 COMPRESS_DEPENDS_bz2 = ""
-- 
1.7.10