run.sh

#assemble boot.s file  
as boot.s -o boot.o  
  
#compile kernel.c file  
gcc -c kernel.c -o kernel.o -std=gnu99 -ffreestanding -O2 -Wall -Wextra  
  
#linking the kernel with kernel.o and boot.o files  
gcc -T linker.ld -o RunDemo.bin -ffreestanding -O2 -nostdlib kernel.o boot.o -lgcc  
  
#check RunDemo.bin file is x86 multiboot file or not  
grub-file --is-x86-multiboot RunDemo.bin  
  
#building the iso file  
mkdir -p isodir/boot/grub  
cp RunDemo.bin isodir/boot/RunDemo.bin  
cp grub.cfg isodir/boot/grub/grub.cfg  
grub-mkrescue -o RunDemo.iso isodir