From b3b454ee770d708cc0035c2768387cc21aedc1db Mon Sep 17 00:00:00 2001
From: Hans Insulander <hans@codium.se>
Date: Mon, 5 Nov 2012 22:48:09 +0100
Subject: [PATCH] Generate header dependencies and use them in Makefile

---
 Makefile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 58a4d9d..f0e7f41 100755
--- a/Makefile
+++ b/Makefile
@@ -49,6 +49,7 @@ all:	grbl.hex
 
 .c.o:
 	$(COMPILE) -c $< -o $@
+	@$(COMPILE) -MM  $< > $*.d
 
 .S.o:
 	$(COMPILE) -x assembler-with-cpp -c $< -o $@
@@ -74,7 +75,7 @@ load: all
 	bootloadHID grbl.hex
 
 clean:
-	rm -f grbl.hex main.elf $(OBJECTS)
+	rm -f grbl.hex main.elf $(OBJECTS) $(OBJECTS:.o=.d)
 
 # file targets:
 main.elf: $(OBJECTS)
@@ -93,3 +94,7 @@ disasm:	main.elf
 
 cpp:
 	$(COMPILE) -E main.c
+
+# include generated header dependencies
+-include $(OBJECTS:.o=.d)
+