[OpenWrt-Devel] [PATCH 07/13] include/kernel: set build timestamp to SOURCE_DATE_EPOCH if available

[Alexander Couzens]

There is no additional information in the build timestamp.
As long we have no information on the kernel timestamp,
use as constant base for this timestamp the OpenWrt repository.

Signed-off-by: Alexander Couzens <lynxis at fe80.eu>
---
 include/kernel.mk | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/kernel.mk b/include/kernel.mk
index 432e8ce..2f477cf 100644
--- a/include/kernel.mk
+++ b/include/kernel.mk
@@ -5,6 +5,8 @@
 # See /LICENSE for more information.
 #
 
+SOURCE_DATE_EPOCH:=$(shell $(TOPDIR)/scripts/getsource_date_epoch.sh)
+
 ifeq ($(__target_inc),)
   include $(INCLUDE_DIR)/target.mk
 endif
@@ -21,6 +23,10 @@ else
 
   LINUX_KMOD_SUFFIX=ko
 
+  ifneq (,$(SOURCE_DATE_EPOCH))
+    export KBUILD_BUILD_TIMESTAMP=$(shell date -d @$(SOURCE_DATE_EPOCH))
+  endif
+
   ifneq (,$(findstring uml,$(BOARD)))
     KERNEL_CC?=$(HOSTCC)
     KERNEL_CROSS?=
-- 
2.7.0
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