CXXFLAGS := -m32 -ggdb -g3 -O1 -fno-pic -fno-rtti -fno-exceptions -std=c++23 \
            -Wall -Wextra -pedantic -Werror
LDFLAGS := $(CXXFLAGS) -T link.ld -static -nostdlib -fno-use-cxa-atexit

CXXFILES := acpi.cpp \
        ata.cpp \
        boot.cpp \
        gdt.cpp \
        idt.cpp \
        keyboard.cpp \
        memmove.cpp \
        memory.cpp \
        multiboot.cpp \
        pic.cpp \
        pit.cpp \
        tasking.cpp \
        vgaterminal.cpp \
        kernel.cpp

OBJS := $(subst .cpp,.o,$(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: %.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 -drive file=$<,index=2,media=cdrom -monitor stdio -no-reboot -s -S #-d int