bootstrap-scripts
This is our work-in-progress repository for bootstrapping the initial Serpent OS images, which we then use to produce the first self hosting repositories. As explained publicly, our timescale means that proper development isn't yet at full cadence.
Eventually we're looking at simple, configurable shell scripts to automatically build stage1 + stage2 toolchains, and a corresponding chrootable image which we'll use as a simple base to flesh out basic requirements, package management, etc.
When package management features are complete, including build tools, one will need to use a bootstrap image to complete a full bootstrap for a self hosting image.
We plan to make these scripts flexible enough to handle a variety of hardware configurations, although for initial simplicty (and lack of appropriate hardware) we'll just focus on x86_64 hardware.
Requirements
- Host zlib
- Working host toolchain (gcc or clang)
curlbinary in path- non-stupid
tar bash- Yes, these are bash scripts.
stage1
Build a minimal cross-compiler for the target, with supporting C/C++ runtime libraries.
stage2
Use stage1 to cross-compile essentials for a working chroot, and freshly cross-compiled 'native' clang
stage3
Reuse stage1 to build musl + headers.
Reusage stage2 at /serpent in a chroot to build a clean stage3 install.
Multiarch testing
It is advised you install the correct qemu-user-static within your path so that the cross-compilation stages can make use of it.
For example, fetch x86_64_qemu-aarch64-static.tar.gz from the multiarch project, to be able to
chroot into an AArch64 environment from an x86_64 host.
Extract the archive, and install qemu-aarch64-static to /usr/bin or similar.
You'll need to ensure binfmt_misc is configured appropriately, for example, as root:
echo ':aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7:\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff:/usr/bin/qemu-aarch64-static:' > /proc/sys/fs/binfmt_misc/register