Makefile

GCCPARAMS = -m32 -fno-use-cxa-atexit -nostdlib -fno-builtin -fno-rtti -fno-exceptions -fno-leading-underscore
 
ASPARAMS = --32 

LDPARAMS = -melf_i386

objects = loader.o kernel.o

%.o: %.cpp
	gcc $(GCCPARAMS) -c -o $@ $<

%.o: %.s
	as $(ASPARAMS) -o $@ $<

mykernel.bin: linker.ld $(objects)
	ld $(LDPARAMS) -T $< -o $@ $(objects)

mykernel.iso: mykernel.bin 
	mkdir iso
	mkdir iso/boot
	mkdir iso/boot/grub

	cp $< iso/boot/

	echo 'settimeout=0'> iso/boot/grub/grub.cfg 
	echo 'set default=0' >> iso/boot/grub/grub.cfg 
	echo '' >> iso/boot/grub/grub.cfg
	echo 'menuentry "My Operating System" {' >> iso/boot/grub/grub.cfg
	echo 'multiboot /boot/mykernel.bin' >> iso/boot/grub/grub.cfg 
	echo 'boot' >> iso/boot/grub/grub.cfg
	echo '}' >> iso/boot/grub/grub.cfg

	grub-mkrescue --output=mykernel.iso iso
	rm -rf iso

run: mykernel.iso
	(killall VirtualBox && sleep 1) || true 
	VirtualBox --startvm 'My Operation System' &

install: mykernel.bin
	sudo cp $< /boot/mykernel.bin