Makefile

AS     = i686-elf-as
CC     = i686-elf-gcc
CFLAGS = -Wall -Wextra -Wpedantic -Werror -std=c99 -O2 -ffreestanding -fno-stack-protector -g

ARCH   = i386
SRC    = src
BUILD  = build
ISODIR = $(BUILD)/isodir
TARGET = $(BUILD)/os

CFLAGS := $(CFLAGS) -I$(SRC) -I$(SRC)/libc

.PHONY: build grub run clean

all: build

build:
	mkdir -p $(BUILD)
	$(AS) -o $(BUILD)/boot.o $(SRC)/arch/$(ARCH)/boot/boot.s
	$(AS) -o $(BUILD)/io.o $(SRC)/arch/$(ARCH)/io.s
	$(AS) -o $(BUILD)/cpu.o $(SRC)/arch/$(ARCH)/cpu.s
	$(AS) -o $(BUILD)/stack.o $(SRC)/arch/$(ARCH)/stack.s
	$(CC) $(CFLAGS) -c -o $(BUILD)/gdt.o $(SRC)/arch/$(ARCH)/gdt.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/tss.o $(SRC)/arch/$(ARCH)/tss.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/idt.o $(SRC)/arch/$(ARCH)/idt.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/interrupts.o $(SRC)/arch/$(ARCH)/interrupts.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/paging.o $(SRC)/arch/$(ARCH)/paging.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/vga.o $(SRC)/driver/vga.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/panicc.o $(SRC)/kernel/panic.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/tty.o $(SRC)/kernel/tty.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/log.o $(SRC)/kernel/log.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/memory.o $(SRC)/kernel/memory.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/init.o $(SRC)/kernel/init.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/string.o $(SRC)/libc/string.c
	$(CC) $(CFLAGS) -c -o $(BUILD)/kernel.o $(SRC)/kernel.c
	$(CC) -T linker.ld $(CFLAGS) -nostdlib -o $(TARGET) $(BUILD)/*.o

grub: build
	mkdir -p $(ISODIR)/boot/grub
	grub-file --is-x86-multiboot $(TARGET)
	cp $(TARGET) $(ISODIR)/boot/os
	cp grub.cfg $(ISODIR)/boot/grub/grub.cfg
	grub-mkrescue -o $(BUILD)/os.iso $(ISODIR)

run: grub
	qemu-system-i386 -cdrom $(BUILD)/os.iso

clean:
	rm -rf $(BUILD)