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 := $(wildcard src/*.cpp) $(wildcard src/*.zig)

PROJECT := myos
PRJISO := $(PROJECT).iso
PRJBIN := $(PROJECT).bin
OBJS := $(patsubst src/%.cpp,out/%.o,$(patsubst src/%.zig,out/%.o,$(CXXFILES)))

all: $(PRJISO)

$(PRJISO): iso/boot/$(PRJBIN) iso/boot/grub/grub.cfg
	@echo "  ISO " $@
	@grub-mkrescue -o $@ iso/

iso/boot/$(PRJBIN): $(OBJS) link.ld
	@echo "  LD  " $@
	@g++ $(LDFLAGS) -o $@ $(OBJS)

out/:
	@mkdir out

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

out/%.o: src/%.zig
	@echo "  ZIG " $<
	@zig build-obj -target x86-freestanding -O ReleaseSmall $<
	@mv $(patsubst src/%.zig,%.o,$<)* out/

clean:
	@echo "  CLEAN"
	@rm -f $(OBJS) $(PRJBIN) $(PRJISO)

run: myos.iso
	@echo "  QEMU"
	@qemu-system-i386 -drive file=$<,index=2,media=cdrom -monitor stdio -no-reboot #-s -S #-d int