From a2e2d1162bba6de677f7986c0d31e3fbfb18a42a Mon Sep 17 00:00:00 2001
From: Stuart Longland <me@vk4msl.id.au>
Date: Sun, 19 Mar 2017 12:37:22 +1000
Subject: [PATCH] Makefile: If setpoint.h{,.diff} matches, just update
 timestamp

---
 Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 9326ed9..d61c1c0 100644
--- a/Makefile
+++ b/Makefile
@@ -50,7 +50,10 @@ powerctl.elf: powerctl.o uart.o
 powerctl.o: board.h setpoints.h
 uart.o: uartcfg.h uart.h
 setpoints.h: setpoints.h.dist
-	@if [ -f $@ ]; then \
+	@if [ -f $@ ] ; then \
+		if cmp $^ $@ ; then \
+			exec touch $@; \
+		fi; \
 		echo "Existing $@ found.  Please compare this file with"; \
 		echo "$^ to check for any new definitions and merge as"; \
 		echo "required."; \