build: move definition of KBUILD_BUILD_TIMESTAMP to include/kernel.mk

[openwrt/openwrt.git] / include / kernel.mk

diff --git a/include/kernel.mk b/include/kernel.mk
index effece2869d5ad21eba509d2614326a1f3b6b82e..464c94572e9c67d24a6de46f8db1babc6b4d9dc7 100644 (file)
--- a/include/kernel.mk
+++ b/include/kernel.mk
@@ -10,6 +10,12 @@ CHECK:=1
 DUMP:=1
 endif
 
+ifneq ($(SOURCE_DATE_EPOCH),)
+  ifndef DUMP
+    KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
+  endif
+endif
+
 ifeq ($(__target_inc),)
   ifndef CHECK
     include $(INCLUDE_DIR)/target.mk