hello.blink.44.c

#include <avr/io.h>
#include <util/delay.h>

int main(void) {

	DDRA = 0b10000000; 

	while (1) {

	  PORTA = 0b10000000;
	  _delay_ms(1000);

	  PORTA = 0b00000000;
	  _delay_ms(1000);

	}

}

makefile

PROJECT=hello.blink.44
SOURCES=$(PROJECT).c
MMCU=attiny44
MMCU_PROG=t44
F_CPU=1000000

CFLAGS=-mmcu=$(MMCU) -Wall -Os -DF_CPU=$(F_CPU)

$(PROJECT).hex: $(PROJECT).out
	avr-objcopy -O ihex $(PROJECT).out $(PROJECT).c.hex;\
	avr-size --mcu=$(MMCU) --format=avr $(PROJECT).out
 
$(PROJECT).out: $(SOURCES)
	avr-gcc $(CFLAGS) -I./ -o $(PROJECT).out $(SOURCES)
 
program-bsd: $(PROJECT).hex
	avrdude -p $(MMCU_PROG) -c bsd -U flash:w:$(PROJECT).c.hex

program-dasa: $(PROJECT).hex
	avrdude -p $(MMCU_PROG) -P /dev/ttyUSB0 -c dasa -U flash:w:$(PROJECT).c.hex

program-avrisp2: $(PROJECT).hex
	avrdude -p $(MMCU_PROG) -P usb -c avrisp2 -U flash:w:$(PROJECT).c.hex

program-usbtiny: $(PROJECT).hex
	avrdude -p $(MMCU_PROG) -P usb -c usbtiny -U flash:w:$(PROJECT).c.hex

program-dragon: $(PROJECT).hex
	avrdude -p $(MMCU_PROG) -P usb -c dragon_isp -U flash:w:$(PROJECT).c.hex