From 65447104d64adb99db9c862ed501e930d091fe15 Mon Sep 17 00:00:00 2001
From: Michael Buesch <mb@bu3sch.de>
Date: Mon, 18 Jan 2010 02:00:29 +0100
Subject: pressure_control: Implement auto-deps

Signed-off-by: Michael Buesch <mb@bu3sch.de>
---
 pressure_control/firmware/Makefile | 38 +++++++++++++++++++++++++++-----------
 1 file changed, 27 insertions(+), 11 deletions(-)

(limited to 'pressure_control/firmware/Makefile')

diff --git a/pressure_control/firmware/Makefile b/pressure_control/firmware/Makefile
index cfb0105..5966490 100644
--- a/pressure_control/firmware/Makefile
+++ b/pressure_control/firmware/Makefile
@@ -1,3 +1,4 @@
+# The architecture configuration
 ARCH		= atmega8
 AVRDUDE_ARCH	= m8
 AVRDUDE		= avrdude
@@ -5,17 +6,21 @@ AVRDUDE_SPEED	= 1
 PROGRAMMER	= avrisp2
 PROGPORT	= usb
 
+# The toolchain definitions
 CC		= avr-gcc
 OBJCOPY		= avr-objcopy
 SIZE		= avr-size
+READELF		= avr-readelf
 SPARSE		= sparse
 
 V		= @		# Verbose build:  make V=1
 C		= 0		# Sparsechecker build:  make C=1
 Q		= $(V:1=)
 QUIET_CC	= $(Q:@=@echo '     CC       '$@;)$(CC)
+QUIET_DEPEND	= $(Q:@=@echo '     DEPEND   '$@;)$(CC)
 QUIET_OBJCOPY	= $(Q:@=@echo '     OBJCOPY  '$@;)$(OBJCOPY)
 QUIET_SIZE	= $(Q:@=@echo '     SIZE     '$@;)$(SIZE)
+QUIET_READELF	= $(Q:@=@echo '     READELF  '$@;)$(READELF)
 ifeq ($(C),1)
 QUIET_SPARSE	= $(Q:@=@echo '     SPARSE   '$@;)$(SPARSE)
 else
@@ -29,7 +34,7 @@ SPARSEFLAGS	= $(CFLAGS) -I "/usr/lib/avr/include" -D__AVR_ARCH__=4 \
 		  -Dexternally_visible=dllexport
 
 
-OBJECTS = main.o util.o valves.o sensor.o remote.o
+SRCS	= main.c util.c valves.c sensor.c remote.c
 NAME	= pressure_control
 
 BIN	= $(NAME).bin
@@ -37,17 +42,27 @@ HEX	= $(NAME).hex
 EEP	= $(NAME).eep.hex
 FUSES	= $(NAME).fuses.bin
 
-all: $(HEX) $(FUSES)
+.SUFFIXES:
+.PHONY: all avrdude install_flash install_eeprom install reset writefuse clean distclean
+.DEFAULT_GOAL := all
 
-main.o: util.h calibration.h valves.h sensor.h remote.h main.h
+DEPS = $(sort $(patsubst %.c,dep/%.d,$(1)))
+OBJS = $(sort $(patsubst %.c,obj/%.o,$(1)))
 
-util.o: util.h calibration.h
+# Generate dependencies
+$(call DEPS,$(SRCS)): dep/%.d: %.c 
+	@mkdir -p $(dir $@)
+	$(QUIET_DEPEND) -o $@.tmp -MM -MG -MT "$@ $(patsubst dep/%.d,obj/%.o,$@)" $(CFLAGS) $< && mv -f $@.tmp $@
 
-valves.o: util.h valves.h main.h
+-include $(call DEPS,$(SRCS))
 
-sensor.o: util.h sensor.h
+# Generate object files
+$(call OBJS,$(SRCS)): obj/%.o:
+	@mkdir -p $(dir $@)
+	$(QUIET_SPARSE) $(SPARSEFLAGS) $<
+	$(QUIET_CC) -o $@ -c $(CFLAGS) $<
 
-remote.o: util.h remote.h calibration.h main.h valves.h
+all: $(HEX) $(FUSES)
 
 %.s: %.c
 	$(QUIET_CC) $(CFLAGS) -S $*.c
@@ -56,14 +71,15 @@ remote.o: util.h remote.h calibration.h main.h valves.h
 	$(QUIET_SPARSE) $(SPARSEFLAGS) $<
 	$(QUIET_CC) -o $@ -c $(CFLAGS) $<
 
-$(BIN): $(OBJECTS)
-	$(QUIET_CC) $(CFLAGS) -o $(BIN) $(OBJECTS) $(LDFLAGS)
+$(BIN): $(call OBJS,$(SRCS))
+	$(QUIET_CC) $(CFLAGS) -o $(BIN) $(call OBJS,$(SRCS)) $(LDFLAGS)
 
 $(HEX): $(BIN)
 	$(QUIET_OBJCOPY) -R.eeprom -R.fuse -O ihex $(BIN) $(HEX)
 	$(QUIET_OBJCOPY) -j.eeprom --set-section-flags=.eeprom="alloc,load" \
 			 --change-section-lma .eeprom=0 -O ihex $(BIN) $(EEP)
 	$(QUIET_SIZE) $(BIN)
+	$(QUIET_READELF) -S $(BIN) | egrep '(Name|text|eeprom|data|bss)'
 
 avrdude:
 	$(AVRDUDE) -B $(AVRDUDE_SPEED) -p $(AVRDUDE_ARCH) \
@@ -97,10 +113,10 @@ writefuses: $(FUSES)
 	 -U hfuse:w:$$(hexdump -e '1/1 "0x%02X "' $(FUSES) | cut -d ' ' -f 2):m
 
 clean:
-	-rm -f *~ *.o $(BIN)
+	rm -Rf *~ *.o obj dep $(BIN)
 
 distclean: clean
-	-rm -f *.s $(HEX) $(EEP) $(FUSES)
+	rm -f *.s $(HEX) $(EEP) $(FUSES)
 
 help:
 	@echo "Makefile"
-- 
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