init

Makefile

@@ -0,0 +1,47 @@
+CFLAGS = -ffreestanding -nostdlib -fno-builtin -fno-stack-protector -Wall -Wextra
+LDFLAGS = -ffreestanding -nostdlib -lgcc
+ASFLAGS =
+
+CC = i686-elf-gcc
+AS = i686-elf-as
+LD = i686-elf-gcc
+GRUB_FILE = grub-file
+GRUB_MKRESCUE = grub-mkrescue
+
+KERNEL = myos.bin
+ISO = myos.iso
+
+SOURCES_C = kernel.c gdt.c
+SOURCES_ASM = boot.s idt_load.s gdt_flush.s pit_handler.s
+OBJECTS = $(SOURCES_C:.c=.o) $(SOURCES_ASM:.s=.o)
+
+ISO_DIR = isodir
+GRUB_DIR = $(ISO_DIR)/boot/grub
+
+.PHONY: all clean iso
+
+all: $(ISO)
+
+$(KERNEL): $(OBJECTS) linker.ld
+	$(LD) -T linker.ld -o $(KERNEL) $(OBJECTS) $(LDFLAGS)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+%.o: %.s
+	$(AS) $(ASFLAGS) $< -o $@
+
+iso: $(ISO)
+
+$(ISO): $(KERNEL) grub.cfg
+	mkdir -p $(GRUB_DIR)
+	cp $(KERNEL) $(ISO_DIR)/boot/$(KERNEL)
+	cp grub.cfg $(GRUB_DIR)/grub.cfg
+	$(GRUB_MKRESCUE) -o $(ISO) $(ISO_DIR)
+
+check-multiboot: $(KERNEL)
+	$(GRUB_FILE) --is-x86-multiboot $(KERNEL) && echo "multiboot confirmed" || echo "the file is not multiboot"
+
+clean:
+	rm -f $(OBJECTS) $(KERNEL) $(ISO)
+	rm -rf $(ISO_DIR)