ATtiny85 avr-gcc / avrdude Makefile

Makefile

DEVICE     = attiny85
CLOCK      = 8000000
PROGRAMMER = stk500v1
PORT	   = /dev/tty.usbmodem1421
BAUD       = 19200
FILENAME   = main
COMPILE    = avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE)

all: usb clean build upload

usb:
	ls /dev/cu.*
	
build:
	$(COMPILE) -c $(FILENAME).c -o $(FILENAME).o
	$(COMPILE) -o $(FILENAME).elf $(FILENAME).o
	avr-objcopy -j .text -j .data -O ihex $(FILENAME).elf $(FILENAME).hex
	avr-size --format=avr --mcu=$(DEVICE) $(FILENAME).elf

upload:
	avrdude -v -p $(DEVICE) -c $(PROGRAMMER) -P $(PORT) -b $(BAUD) -U flash:w:$(FILENAME).hex:i 

clean:
	rm main.o
	rm main.elf
	rm main.hex

@edwardhotchkiss - thank you! This is really simple and it works, unlike every other avr-gcc makefile on the web.

@vyorkin - your avr-size appears to be just regular GNU size, as I get a similar error on Ubuntu if I

size --format=avr --mcu=atmega8a main.elf

instead of

avr-size --format=avr --mcu=atmega8a main.elf

avr-size --version returns GNU size (GNU Binutils) 2.26.20160125 for me, though, and the avr-size binary is huge compared to the regular one.