Makefile

KERNEL_OBJS = loader.o kernel/kernel.o kernel/framebuffer.o kernel/io.o \
			kernel/serial.o kernel/gdt.o kernel/lgdt.o kernel/idt.o \
			kernel/interrupts.o kernel/timer.o kernel/x86.o
STDLIB_OBJS = lib/libc/string.o lib/libc/stdlib.o
CC = gcc
CFLAGS = -m32 -nostdlib -nostdinc -fno-builtin -fno-stack-protector \
			-nostartfiles -nodefaultlibs -Wall -Wextra -Werror -c -I./lib/libc/
LDFLAGS = -T link.ld -melf_i386
AS = nasm
ASFLAGS = -f elf

all: kernel.elf iso/boot/grub/stage2_eltorito os.iso

kernel.elf: $(STDLIB_OBJS) $(KERNEL_OBJS)
	ld $(LDFLAGS) $(STDLIB_OBJS) $(KERNEL_OBJS) -o kernel.elf

os.iso:
	cp kernel.elf iso/boot/kernel.elf
	@genisoimage -R -b boot/grub/stage2_eltorito \
				-no-emul-boot                          \
				-boot-load-size 4                      \
				-input-charset utf8                    \
				-quiet                                 \
				-boot-info-table                       \
				-o os.iso                              \
				-A os                                  \
				iso

%.o: %.c
	$(CC) $(CFLAGS) $< -o $@

%.o: %.s
	$(AS) $(ASFLAGS) $< -o $@

iso/boot/grub/stage2_eltorito:
	mkdir -p iso/boot/grub
	cp stage2_eltorito iso/boot/grub/
	cp menu.lst iso/boot/grub/

run:
	bochs -f bochsrc.txt -q

clean:
	-rm -rf *.o kernel/*.o lib/libc/*.o kernel.elf os.iso iso bochslog* com1.out