From 09a40fb6fcb58a693758318fe8103d4abf7cd866 Mon Sep 17 00:00:00 2001
From: Kaspar Schleiser <kaspar@schleiser.de>
Date: Thu, 14 Mar 2019 12:04:56 +0100
Subject: [PATCH] riotboot: use epoch as APP_VER default

---
 makefiles/boot/riotboot.mk | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/makefiles/boot/riotboot.mk b/makefiles/boot/riotboot.mk
index 0abe2c1d75..5724116cb8 100644
--- a/makefiles/boot/riotboot.mk
+++ b/makefiles/boot/riotboot.mk
@@ -27,8 +27,8 @@ export SLOT0_OFFSET ?= $(RIOTBOOT_LEN)
 # export does not work properly with variables using '$((  ))' so evaluate it in a shell
 export SLOT1_OFFSET ?= $(shell echo $$(($(SLOT0_OFFSET) + $(SLOT0_LEN))))
 
-# Mandatory APP_VER, set to 0 by default
-APP_VER ?= 0
+# Mandatory APP_VER, set to epoch by default
+APP_VER ?= $(shell date +%s)
 
 # Final target for slot 0 with riot_hdr
 SLOT0_RIOT_BIN = $(BINDIR_APP)-slot0.riot.bin