# Variables
CC = i386-elf-gcc
LD = i386-elf-ld
AS = nasm

CFLAGS = -ffreestanding -m32 -Iinclude -Wall -Wextra 

SRC = ./src
BUILD = ./build
# C_FILES = $(shell find $(SRC) -name "*.c" -exec basename -s ".c" {} \;)

# Main compilation target
os: bootloader kernel
	@cat $(BUILD)/boot.bin $(BUILD)/kernel.bin > $(BUILD)/os.bin
	@dd if=/dev/zero of=kern.iso bs=512 count=2880
	@dd if=$(BUILD)/os.bin of=kern.iso conv=notrunc

# Bootloader: This target is responsible for creating boot.bin
bootloader:
	@$(AS) -fbin -o $(BUILD)/boot.bin $(SRC)/boot.asm

# Kernel: This target is responsible for creating kernel.bin
kernel: $(C_FILES) $(SRC)/entry.asm
	@$(AS) -felf32 -o $(BUILD)/entry.o $(SRC)/entry.asm
	@$(CC) $(CFLAGS) -o $(BUILD)/kernel.o -c $(SRC)/kernel.c
	@$(LD) -Tkernel.ld --oformat binary -o $(BUILD)/kernel.bin $(BUILD)/*.o

# Run QEMU
run:
	qemu-system-x86_64 -drive format=raw,file="./kern.iso",index=0,media=disk -m 256M -accel tcg

# Clean all build files
clean:
	@rm -rf $(BUILD)/*
	@rm -f kern.iso