Makefile

#   Makefile - build script
#   Copyright (C) 2014  Nicolas Benes
#
#   This program is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.

CC := avr-gcc
OBJDUMP := avr-objdump
OBJCOPY := avr-objcopy
MV := mv
RM := rm
MKDIR := mkdir
DOXYGEN := doxygen
SIZE := avr-size
ECHO := echo
EXPAND := expand -t 2
INDENT := indent

TARGET := rxsms
MCU := atxmega32a4u
# cpu clk frq w/o 'UL'
F_CPU := 32000000

DOCDIR := doc

GCC_VERSION:=$(shell $(CC) -dumpversion)

SRC := $(wildcard *.c)
HDR := $(wildcard *.h)
OBJ := $(patsubst %.c, %.o, $(SRC))

override CFLAGS+=-mmcu=$(MCU) -DF_CPU=$(F_CPU)UL -O3 \
	-fdata-sections -ffunction-sections -fshort-enums -Wall -Wextra \
	-Werror-implicit-function-declaration  -Wmissing-prototypes \
	-Wpointer-arith -Wstrict-prototypes -Wswitch-enum \
	-mrelax -std=gnu11 -g3
#	-pedantic
# commented because it's too verbose
#	-save-temps

ifeq ($(GCC_VERSION),4.9.2)
  override CFLAGS+=-fdiagnostics-color
  SIZE+=--target=elf32-avr
else
  SIZE+=--mcu=$(MCU) --format=avr
endif

LFLAGS += -mmcu=$(MCU) -O3
LFLAGS += -Wl,-Map,$(TARGET).map
# preserve intermediate files
.SECONDARY:


all: $(TARGET).elf  $(TARGET).hex  $(TARGET).lss $(patsubst %.o, %.lss, $(OBJ)) $(TARGET).eep
	$(SIZE) $<
	@echo DONE

%.hex: %.elf
	$(OBJCOPY) -O ihex -R .eeprom -R .fuse -R .lock $< $@

%.eep: %.elf
	$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
		--change-section-lma .eeprom=0 --no-change-warnings -O ihex $< $@

$(TARGET).lss: $(TARGET).elf
	$(MV) $@ $@-prev || true
	$(MV) $@-dense $@-dense-prev || true
	$(OBJDUMP) -S $< | $(EXPAND) > $@
	$(OBJDUMP) -d $< | $(EXPAND) > $@-dense

%.lss: %.o
	$(MV) $@ $@-prev 2>/dev/null || true
	$(OBJDUMP) -r -d $< | $(EXPAND) > $@

%.elf: $(OBJ)
	@$(ECHO) Link $@
	@$(CC) $(LFLAGS) -o $@ $^

%.o: %.c $(HDR) Makefile
	@$(ECHO) Compile $<
	@$(CC) $(CFLAGS) -o $@ -c $<

doxy: | $(DOCDIR)
	$(RM) -rf $(wildcard $(DOCDIR)/*)
	$(DOXYGEN) Doxyfile

indent:
	$(INDENT) -kr -psl -nut $(SRC) $(HDR)

program: $(TARGET).elf
	avrdude -P usb -p x32a4u -c jtag2pdi -e -U flash:w:$<

clean:
	$(RM) -rf $(DOCDIR) $(TARGET).elf  $(TARGET).hex  \
		$(wildcard *.lss*) \
		$(TARGET).eep $(TARGET).map $(OBJ) \
		$(wildcard *.i) $(wildcard *.s)

.PHONY: all clean doxy indent program