Builds self-hosting bootable images that rebuild themselves from a hex0 seed, for seven architecture/board targets. Wraps stage0-uefi, M2libc and GNU Mes into a reproducible, sealed image per target.

sh run.sh all                          # x86/bios (default)
ARCH=riscv64 BOARD=uefi sh run.sh all  # pick a target

Builds the host toolchain, assembles a bootable image, boots it in QEMU, and checks the booted image reproduces itself byte-for-byte against its sealed hash.

run.sh all runs these in order (each also runs standalone), then extracts the sealed image with make_k0:

1. make_host — a hex0 seed bootstraps the stage0-posix chain into the host toolchain, plus the builder-hex0 stage1 kernels and helper tools.
2. make_k0_img — packs the toolchain, full source tree and seeds into a bootable image out/k0-<arch>-<board>.img (UEFI also gets a -fat.img).
3. boot_k0_img — boots it in QEMU; the guest reruns the whole bootstrap and builds GNU Mes, printing Hello from inside the <arch> image on success.
4. sha256sum_k0_answers — seals/verifies the post-boot image against k0-<arch>-<board>.answers.

The stage0-uefi compiler chain that runs inside the image is documented in the stage0-uefi README.

sh run.sh make_host make_k0_img                              # skip QEMU
./out/host-x86/bin/bh0x out/k0-x86-bios.img out/k0-x86-bios  # extract image
sh LICENSES/verify.sh                                        # check licenses