hermetic_cc_toolchain/contrib/README-patched.md

Patched Zig release

This file explains how this zig version was created. As of first writing, 0.10.0-dev.4301+uber1 + https://github.com/ziglang/zig-bootstrap/pull/131

Steps to re-create a patched zig:

$ wget https://github.com/ziglang/zig/pull/13051.patch
$ git clone https://github.com/ziglang/zig-bootstrap; cd zig-bootstrap

# if https://github.com/ziglang/zig-bootstrap/pull/131 is not merged: patch it.

$ git am --directory=zig ../13051.patch

$ ${EDITOR:-vi} build  # replace the hash with "+uber1" and bump the last number in ZIG_VERSION

$ ./build-and-archive

Recent zig-bootstrap versions require cmake >= 3.19, which is available from ubuntu 22.04 (jammy) or debian 12 (bookworm). Otherwise CMAKE will unable to "Find the C compiler". A workaround:

docker run --privileged -v `pwd`:/x -w /x -ti --rm buildpack-deps:bookworm \
    sh -c 'apt-get update && apt-get install -y cmake && exec ./build-and-archive'

(--privileged is necessary because of devpod nuances. You can skip it if you don't know what is a devpod.)

build-and-archive, this file and 13051.patch should be in the archive where you got your patched zig.