Abuild zlib archive

This repository preserves the historical zlib source revision formerly used by Abuild. The authoritative project is maintained by Mark Adler in the official zlib repository; its original documentation remains available in the upstream README.

The long-lived branches have deliberately separate roles:

• master mirrors the authoritative upstream develop branch;
• abuild is the exact upstream v1.2.11 revision formerly pinned by Abuild; and
• abuild-gh adds only this maintenance README and files below .github/ to abuild.

The abuild branch points directly at upstream commit cacf7f1d, the dereferenced target of the signed v1.2.11 tag. Abuild carried no source patches on top of that revision. It stopped building vendored zlib sources in 2026 and now uses the distribution development library. This repository is retained for provenance and reproducibility, not as a recommended zlib version for new deployments.

Continuous integration

Run the same Trixie check locally with Docker:

.github/ci/run .github/ci/check

The check copies the preserved source into a private writable directory, configures and builds it, runs the upstream test target, and verifies a compression round trip. The build executes as the invoking non-root user in a read-only container without network access or Linux capabilities.

The weekly upstream monitor checks whether master still matches upstream develop and whether all versioned release-tag refs are mirrored exactly. It reports drift but never updates branches or tags automatically.