[PATCH v1 2/2] Define SOURCE_DATE_EPOCH based on git log

[Frédéric Pierret (fepitre) <frederic.pierret@xxxxxxxxxxxx>]

---
 xen/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/Makefile b/xen/Makefile
index 30b1847515..4cc35556ef 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -6,6 +6,8 @@ export XEN_EXTRAVERSION ?= -unstable$(XEN_VENDORVERSION)
 export XEN_FULLVERSION   = $(XEN_VERSION).$(XEN_SUBVERSION)$(XEN_EXTRAVERSION)
 -include xen-version
 
+export SOURCE_DATE_EPOCH       ?= $(shell git log -1 --format=%ct 2>/dev/null)
+
 export XEN_WHOAMI      ?= $(USER)
 export XEN_DOMAIN      ?= $(shell ([ -x /bin/dnsdomainname ] && 
/bin/dnsdomainname) || ([ -x /bin/domainname ] && /bin/domainname || echo 
[unknown]))
 ifneq ($(SOURCE_DATE_EPOCH),)
-- 
2.26.2