The Microdot Project guides you to create a fully functional but compact Linux system from scratch

An LFS like guide for cross-bootstrapping a small system for the Raspberry Pi

A dockerized, deterministic, automated, fixed, and fully-relocatable build of @NiLuJe's toolchain for Kobo eReaders.

Ingenius System Manager

Pygos bootstrap/build system

Building your own custom Linux system

Aarch64 system toolchain. Built with LTO+PGO.

GCC Cross-Toolchain for Rapspberry PI Zero 2 on ArchLinux ARM from FreeBSD