OBJECTS = loader.o load_gdt.o gdt.o serial.o framebuffer.o io.o kmain.o

CC = gcc
CFLAGS = -m32 -nostdlib -nostdinc -fno-builtin -fno-stack-protector \
	 -nostartfiles -nodefaultlibs -Iinclude -Wall -Wextra -Werror -c \
	 -ansi -pedantic

LDFLAGS = -T link.ld -melf_i386

AS = nasm
ASFLAGS = -f elf

all: kernel.elf

kernel.elf: $(OBJECTS)
	ld $(LDFLAGS) $^ -o $@

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

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

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

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

os.iso: kernel.elf
	cp kernel.elf iso/boot/kernel.elf
	mkisofs -R 				\
		-b boot/grub/stage2_eltorito 	\
		-no-emul-boot 			\
		-boot-load-size 4		\
		-A os 				\
		-input-charset UTF-8 		\
		-quiet 				\
		-boot-info-table 		\
		-o os.iso 			\
		iso

doc:
	doxygen Doxyfile

.PHONY: run clean all

run: os.iso
	qemu-system-i386 -cdrom $<  -serial stdio #-d cpu

clean:
	rm -r *.o kernel.elf os.iso doc