Makefile

# Compilers and Assemblers
AS = nasm
CC = gcc
LD = ld

# Build Flags
ASFLAGS = -f elf64
CFLAGS = -ffreestanding -nostdlib -fno-pic -fno-pie -fno-stack-protector -mno-red-zone -mno-mmx -mno-sse -mno-sse2 -mcmodel=kernel -m64 -O2
LDFLAGS = -n -T linker.ld

# Object files required for kernel
OBJS = boot.o kernel.o keyboard.o fs.o editor.o ata.o

# Binary and ISO output targets
BIN = iso/boot/xionos.bin
ISO = xionos.iso
INITRD = iso/boot/initrd.img

# Default rule: 'make' or 'make run' launches QEMU
all: run

# Create a persistent 10MB raw virtual hard disk (only created if disk.img doesn't exist)
disk.img:
	qemu-img create -f raw disk.img 10M

# Run XionOS in QEMU with the virtual hard disk attached
run: $(ISO) disk.img
	qemu-system-x86_64 -hda disk.img -cdrom $(ISO)

# Rule to create ISO image using GRUB
$(ISO): $(BIN) $(INITRD)
	@mkdir -p iso/boot/grub
	grub-mkrescue -o $(ISO) iso

# Rule to generate RAM disk image via Python script
$(INITRD): pack_fs.py
	@mkdir -p iso/boot
	python3 pack_fs.py
	mv initrd.img $(INITRD)

# Rule to link kernel binary from object files
$(BIN): $(OBJS)
	@mkdir -p iso/boot
	$(LD) $(LDFLAGS) $(OBJS) -o $(BIN)

# Assembly compilation rule
boot.o: boot.asm
	$(AS) $(ASFLAGS) boot.asm -o boot.o

# Generic C compilation rule
%.o: %.c
	$(CC) $(CFLAGS) -c $< -o $@

# Clean up ALL build artifacts (including fs.o and initrd)
clean:
	rm -f *.o $(BIN) $(ISO) $(INITRD) disk.img

.PHONY: all run clean