ASFLAGS := --32
CXXFLAGS := -m32 -ggdb -g3 -O0 -fno-pic -ffreestanding -fno-rtti -fno-exceptions -std=c++23
LDFLAGS := -m32 -static -T link.ld -ffreestanding -nostdlib

ASFILES := boot.s
CXXFILES := gdt.cpp \
	    idt.cpp \
	    memory.cpp \
	    multiboot.cpp \
	    pic.cpp \
	    pit.cpp \
	    tasking.cpp \
            vgaterminal.cpp \
	    kernel.cpp

OBJS := $(subst .s,.o,$(ASFILES)) \
	$(subst .cpp,.o,$(CXXFILES))

all: myos.iso

myos.iso: myos.bin iso/boot/grub/grub.cfg
	@echo "  ISO " $@
	@cp myos.bin iso/boot/
	@grub-mkrescue -o myos.iso iso/

myos.bin: $(OBJS) link.ld
	@echo "  LD  " $@
	@g++ $(LDFLAGS) -o $@ $(OBJS)

%.o: %.s
	@echo "  AS  " $<
	@as $(ASFLAGS) -c $< -o $@

%.o: %.cpp
	@echo "  CXX " $<
	@g++ $(CXXFLAGS) -c $< -o $@

clean:
	@echo "  CLEAN"
	@rm -f $(OBJS) myos.bin myos.iso

run: myos.iso
	@echo "  QEMU"
	@qemu-system-i386 -cdrom $< -monitor stdio -no-reboot -s -S #-d int