a.out: mysubroutines.o prog3.o
    ld -m elf_i386 mysubroutines.o prog3.o
mysubroutines.o: mysubroutines.asm
    nasm -f elf mysubroutines.asm
prog3.o: prog3.asm
    nasm -f elf prog3.asm

clean: 
    rm *.o a.out