Building

• Install Bash, GNU make, GNU binutils, and POSIX.1-2008 cc + libc
• cd to a clean directory, put slimcc source in ./slimcc
• Run the script, a rootfs will be created, (default name is ./rfs)
• chroot with your favorite method (I use systemd-nspawn -D)
• Optionally, repeat inside the chroot as stage2 bootstrap

TL'DR of the bootstrap script

• build slimcc
• build musl with the just-built slimcc
• build the rest of binaries statically linked to the just-built musl, with the just-built slimcc

What's included?

slimcc
musl
toybox
GNU bash
GNU binutils
GNU make
GNU wget
OpenBSD mg
OpenBSD oksh
OpenBSD libtls (for wget https support)

The tools chosen may not be as "minimal" as one expected, however it is the minimum requirement to compile musl (needs gmake) and toybox (needs bash) without rewriting their build process. As I do this from the perspective of a compiler maintainer, modifying projects to fit minimalism does not interest me as much as improving slimcc to be able to compile their dependencies.

mg and oksh are the text editor and interactive shell of choice. toybox vi is also enabled in case anyone prefer it.

Inspirations

• https://github.com/oasislinux/oasis
• https://github.com/JonathanWilbur/punchcardos
• https://github.com/glaucuslinux/glaucus