OSDEV makefile 2019-01-028

.phoney : default qemu
default : myOS.bin qemu
qemu : myOS.bin


boot.o: boot.s
    i868-elf-as -o $@ $<

kernel.o : kernel.c
    i686-elf-gcc -c -o $@  $< -std=gnu99 -ffreestanding -O2 -Wall -Wextra


OS_OBJS := boot.o kernel.o
myOS.bin : linker.ld $(OS_OBJS)
    i686-elf-gcc -T linker.ld -o $@ -ffreestanding -O2 -nostdlib $(OS_OBJS) -lgcc

MYOSISO/boot/myOS.bin : myOS.bin
    mkdir -p MYOSISO/boot/
    cp myOS.bin MYOSISO/boot/myOS.bin

MYOSISO/grub/grub.cfg : grub.cfg
    mkdir -p MYOSISO/grub/
    cp myOS.bin MYOSISO/grub/grub.cfg

ISO_FILES := MYOSISO/grub/grub.cfg MYOSISO/boot/myOS.bin
myOS.iso : $(ISO_FILES)
    grub-mkrescue -o $@ MYOSISO