GPP_ARGS = -Wall -Wextra -O3 -ggdb -I include -ffreestanding -fno-exceptions -fno-rtti -mno-sse
KERNEL_OBJECTS = allocator.cpp entry.cpp framebuffer.cpp paging.asm \
  paging.cpp storage.cpp terminal.cpp utility.cpp bd/memory.cpp fs/tarfs.cpp

all: out/disk.iso

run: out/disk.iso
	gdb -x qemu.gdb

clean:
	rm -rf obj out

dist-clean:
	rm -rf limine
	rm -f include/mercury/kernel/limine.hpp

limine:
	git clone --depth=1 -b v6.x-branch https://github.com/limine-bootloader/limine.git limine
	cd limine && ./bootstrap && ./configure -q --enable-bios --enable-bios-cd
	+make -C limine
	cp limine/limine.h include/mercury/kernel/limine.hpp

obj/kernel/entry.cpp.o: kernel/entry.cpp limine
	@mkdir -p $(@D)
	g++ -c ${GPP_ARGS} $< -o $@

obj/kernel/%.cpp.o: kernel/%.cpp
	@mkdir -p $(@D)
	g++ -c ${GPP_ARGS} $< -o $@

obj/kernel/%.asm.o: kernel/%.asm
	@mkdir -p $(@D)
	nasm -f elf64 $< -o $@

obj/kernel.elf: ${KERNEL_OBJECTS:%=obj/kernel/%.o}
	ld -T kernel/link.ld $^ -o $@

obj/initfs.tgz:
	@mkdir -p obj/initfs
	echo test > obj/initfs/test.txt
	tar czf obj/initfs.tgz -C obj/initfs .

out/disk.iso: obj/kernel.elf obj/initfs.tgz limine
	mkdir -p obj/iso out
	cp obj/kernel.elf obj/initfs.tgz limine/bin/limine-bios.sys limine/bin/limine-bios-cd.bin limine.cfg obj/iso/
	cp terminus/ter-u16b.psf obj/iso/termfont.psf
	xorriso -as mkisofs -quiet -no-emul-boot -boot-info-table -boot-load-size 4 -b limine-bios-cd.bin obj/iso -o $@
	limine/bin/limine bios-install $@
	rm -rf obj/iso