Makefile

# Compiler & linker
ASM           = nasm
LIN           = ld
CC            = gcc

# Directory
SOURCE_FOLDER = src
OUTPUT_FOLDER = bin
ISO_NAME      = OS2025
DISK_NAME 	  = storage

# Flags
# Flags
WARNING_CFLAG = -Wall -Wextra -Werror
DEBUG_CFLAG   = -fshort-wchar -g
STRIP_CFLAG   = -nostdlib -fno-stack-protector -nostartfiles -nodefaultlibs -ffreestanding
CFLAGS        = $(DEBUG_CFLAG) $(WARNING_CFLAG) $(STRIP_CFLAG) -m32 -c -I$(SOURCE_FOLDER) -Iheader
AFLAGS        = -f elf32 -g -F dwarf
LFLAGS        = -T $(SOURCE_FOLDER)/linker.ld -melf_i386

# QEMU
QEMU          = qemu-system-i386
QEMU_BASE     = -cdrom $(OUTPUT_FOLDER)/$(ISO_NAME).iso \
                -hda $(OUTPUT_FOLDER)/$(DISK_NAME).bin
QEMU_DEBUG    = -s -S $(QEMU_BASE)

.PHONY: all build run run-fast kernel iso disk clean

all: build

build: disk iso
	@$(QEMU) $(QEMU_BASE)
run:
	@$(QEMU) $(QEMU_DEBUG)
run-fast:
	@$(MAKE) build
clean:
	rm -rf *.o *.iso $(OUTPUT_FOLDER)/kernel
disk:
	@mkdir -p $(OUTPUT_FOLDER)
	@qemu-img create -f raw $(OUTPUT_FOLDER)/$(DISK_NAME).bin 4M


kernel:
	@mkdir -p $(OUTPUT_FOLDER)
	@$(ASM) $(AFLAGS) $(SOURCE_FOLDER)/kernel-entrypoint.s -o $(OUTPUT_FOLDER)/kernel-entrypoint.o
	@# Compile kernel C source
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/kernel.c -o $(OUTPUT_FOLDER)/kernel.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/shell.c -o $(OUTPUT_FOLDER)/shell.o
	@# Compile small C runtime helpers (e.g., string.c)
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/stdlib/string.c -o $(OUTPUT_FOLDER)/string.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/cpu/gdt.c -o $(OUTPUT_FOLDER)/gdt.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/driver/framebuffer.c -o $(OUTPUT_FOLDER)/framebuffer.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/cpu/idt.c -o $(OUTPUT_FOLDER)/idt.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/cpu/isr.c -o $(OUTPUT_FOLDER)/isr.o
	@$(ASM) $(AFLAGS) $(SOURCE_FOLDER)/cpu/isr_stubs.asm -o $(OUTPUT_FOLDER)/isr_stubs.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/cpu/pic.c -o $(OUTPUT_FOLDER)/pic.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/driver/keyboard.c -o $(OUTPUT_FOLDER)/keyboard.o
	@$(ASM) $(AFLAGS) $(SOURCE_FOLDER)/cpu/isr_stubs.asm -o $(OUTPUT_FOLDER)/isr_stubs.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/cpu/portio.c -o $(OUTPUT_FOLDER)/portio.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/driver/disk.c -o $(OUTPUT_FOLDER)/disk.o
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/fs/ext2.c -o $(OUTPUT_FOLDER)/ext2.o
	@# Tambahkan kompilasi untuk paging.c
	@$(CC) $(CFLAGS) $(SOURCE_FOLDER)/memory/paging.c -o $(OUTPUT_FOLDER)/paging.o
	@# Pastikan semua object file disertakan dalam linker command
	@$(LIN) $(LFLAGS) $(OUTPUT_FOLDER)/*.o -o $(OUTPUT_FOLDER)/kernel
	@echo Linking object files and generate elf32...
	@rm -f *.o

iso: kernel
	@mkdir -p $(OUTPUT_FOLDER)/iso/boot/grub
	@cp $(OUTPUT_FOLDER)/kernel     $(OUTPUT_FOLDER)/iso/boot/
	@cp other/grub1                 $(OUTPUT_FOLDER)/iso/boot/grub/
	@cp $(SOURCE_FOLDER)/menu.lst   $(OUTPUT_FOLDER)/iso/boot/grub/
# TODO: Create ISO image
	@genisoimage -R -b boot/grub/grub1 -no-emul-boot -boot-load-size 4 \
		-A os -input-charset utf8 -quiet -boot-info-table \
		-o $(OUTPUT_FOLDER)/$(ISO_NAME).iso $(OUTPUT_FOLDER)/iso
	@rm -r $(OUTPUT_FOLDER)/iso/