[PATCH 2/2] imagebuilder: improve reproducibility

[Paul Spooren]

The SOURCE_DATE_EPOCH is used to unify the mtime within created images,
make it the same as the build system used during creation of the IB.

The LINUX_VERMAGIC is used to create a reproducible IMG_PART_SIGNATURE,
therefore make it available to the IB as well.

Signed-off-by: Paul Spooren <mail at aparcar.org>
---
 target/imagebuilder/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/imagebuilder/Makefile b/target/imagebuilder/Makefile
index 873e1b44e0..175c30282e 100644
--- a/target/imagebuilder/Makefile
+++ b/target/imagebuilder/Makefile
@@ -77,6 +77,8 @@ endif
 		$(CP) -L $(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/dts/* $(IB_DTSDIR); \
 	fi
 	$(SED) 's,^# REVISION:=.*,REVISION:=$(REVISION),g' $(IB_BUILD_DIR)/include/version.mk
+	$(SED) 's,^# SOURCE_DATE_EPOCH:=.*,SOURCE_DATE_EPOCH:=$(SOURCE_DATE_EPOCH),g' $(IB_BUILD_DIR)/include/version.mk
+	$(SED) '/LINUX_VERMAGIC:=/ { s,unknown,$(LINUX_VERMAGIC),g }' $(IB_BUILD_DIR)/include/kernel.mk
 	find $(IB_BUILD_DIR) -name CVS -o -name .git -o -name .svn \
 	  | $(XARGS) rm -rf
 	$(INSTALL_DIR) $(IB_IDIR)
-- 
2.25.1