[PATCH v3 1/5] xen: add XEN_BUILD_POSIX_TIME

[Bobby Eshleman <bobbyeshleman@xxxxxxxxx>]

From: Daniel Kiper <daniel.kiper@xxxxxxxxxx>

POSIX time is required to fill the TimeDateStamp field
in the PE header.

Use SOURCE_DATE_EPOCH if available, otherwise use
`date +%s` (available on both Linux and FreeBSD).

Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Signed-off-by: Bobby Eshleman <bobbyeshleman@xxxxxxxxx>
---
 xen/Makefile                 | 2 ++
 xen/include/xen/compile.h.in | 1 +
 2 files changed, 3 insertions(+)

diff --git a/xen/Makefile b/xen/Makefile
index 544cc0995d..85f9b763a4 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -11,6 +11,7 @@ export XEN_DOMAIN     ?= $(shell ([ -x /bin/dnsdomainname ] 
&& /bin/dnsdomainname) |
 export XEN_BUILD_DATE  ?= $(shell LC_ALL=C date)
 export XEN_BUILD_TIME  ?= $(shell LC_ALL=C date +%T)
 export XEN_BUILD_HOST  ?= $(shell hostname)
+export XEN_BUILD_POSIX_TIME    ?= $(shell echo $${SOURCE_DATE_EPOCH:-$(shell 
date +%s)})
 
 # Best effort attempt to find a python interpreter, defaulting to Python 3 if
 # available.  Fall back to just `python` if `which` is nowhere to be found.
@@ -386,6 +387,7 @@ delete-unfresh-files:
 include/xen/compile.h: include/xen/compile.h.in .banner
        @sed -e 's/@@date@@/$(XEN_BUILD_DATE)/g' \
            -e 's/@@time@@/$(XEN_BUILD_TIME)/g' \
+           -e 's/@@posix_time@@/$(XEN_BUILD_POSIX_TIME)/g' \
            -e 's/@@whoami@@/$(XEN_WHOAMI)/g' \
            -e 's/@@domain@@/$(XEN_DOMAIN)/g' \
            -e 's/@@hostname@@/$(XEN_BUILD_HOST)/g' \
diff --git a/xen/include/xen/compile.h.in b/xen/include/xen/compile.h.in
index 440ecb25c1..b2ae6f96ad 100644
--- a/xen/include/xen/compile.h.in
+++ b/xen/include/xen/compile.h.in
@@ -1,5 +1,6 @@
 #define XEN_COMPILE_DATE       "@@date@@"
 #define XEN_COMPILE_TIME       "@@time@@"
+#define XEN_COMPILE_POSIX_TIME @@posix_time@@
 #define XEN_COMPILE_BY         "@@whoami@@"
 #define XEN_COMPILE_DOMAIN     "@@domain@@"
 #define XEN_COMPILE_HOST       "@@hostname@@"
-- 
2.30.0