build: introduce SOURCE_DATE_EPOCH variable

[openwrt.git] / include / toplevel.mk

diff --git a/include/toplevel.mk b/include/toplevel.mk
index 0cba07c..9709302 100644 (file)
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -24,6 +24,7 @@ export RELEASE
 export REVISION
 export GIT_CONFIG_PARAMETERS='core.autocrlf=false'
 export MAKE_JOBSERVER=$(filter --jobserver%,$(MAKEFLAGS))
+export SOURCE_DATE_EPOCH:=$(shell $(TOPDIR)/scripts/get_source_date_epoch.sh)
 
 # prevent perforce from messing with the patch utility
 unexport P4PORT P4USER P4CONFIG P4CLIENT