CC = avr-gcc
UC = attiny10
COMPOPT = -mmcu=$(UC) -DF_CPU=8000000 -g -Os -flto -mtiny-stack -maccumulate-args -fno-inline-small-functions -mcall-prologues -fno-caller-saves -ffunction-sections
LINKOPT = -mmcu=$(UC) -flto -mrelax -Wl,--gc-sections
OBJ = attiny10-lantern.o light_ws2812.o

.PHONY: clean upload

all: attiny10-lantern.elf

attiny10-lantern.elf: $(OBJ)
	$(CC) $(LINKOPT) -o attiny10-lantern.elf $(OBJ)
	avr-size --mcu=attiny10 -C attiny10-lantern.elf

attiny10-lantern.o: attiny10-lantern.cpp
	$(CC) $(COMPOPT) -c attiny10-lantern.cpp

light_ws2812.o: light_ws2812.c
	$(CC) $(COMPOPT) -c light_ws2812.c

clean:
	rm -f *.o *.elf

install: attiny10-lantern.elf
	avrdude -C /etc/avrdude.conf -c usbasp -p t10 -U flash:w:attiny10-lantern.elf
	avr-size --mcu=attiny10 -C attiny10-lantern.elf

# Binary Size:	990 byte
# -flto:		844 byte
# -mtiny-stack:	842 byte
# Code adv:		818 byte