system prereqs/deps:

• qemu
• grub (grub-mkrescue is used to generate the bootable .iso)
  • xorriso, used by grub-mkrescue to build the .iso
  • you might also have to install mtools so that grub-mkrescue doesn't attempt to build an EFI image
  • additionally, you'll probably need grub-pc-bin. again, this is modulo a bunch of things, and on, eg, Arch, installing grub should pull this in; on Ubuntu, if you're grub-booting off of EFI, you probably don't.

$ cargo install cargo-xbuild
$ make

to run in an emulator:

$ make run