openssl zig package

This is OpenSSL 3.3.2 ported to the Zig Build System.

Usage

Add the package to your build.zig.zon and link the static library:

const openssl = b.dependency("openssl", .{
    .target = target,
    .optimize = optimize,
});
exe.root_module.linkLibrary(openssl.artifact("openssl"));

Then build as usual:

zig build

No system OpenSSL, perl, or configure step is required for a normal build — the generated assembly and configure-derived headers are committed under gen/.

Supported targets

Assembly and per-target headers are pre-generated and checked in for:

Arch	Linux	macOS	Windows
x86_64	✅	✅	✅ (mingw)
aarch64	✅	✅	✅ (mingw)

Building for any other target panics at configure time with "Unsupported target for OpenSSL: no asm variant configured". The variant table lives in config.zig (config.variants).

Regenerating (maintainers)

The committed files under gen/ — perlasm output plus the headers and sources util/dofile.pl fills from templates — are refreshed with:

zig build gen

This shells out to perl and a POSIX sh, running each variant's perlasm scripts and OpenSSL's Configure/dofile.pl against the upstream source tarball, and writes the results straight into the source tree. Normal builds consume the committed output and need neither perl nor a configure step. The generation logic lives in generate.zig and config.zig; mingw-arm64.conf supplies the aarch64-windows Configure target that OpenSSL 3.3.2 lacks.

Zig version compatibility

• 0.16.x (minimum required)

Anti-Endorsement

I do not endorse openssl. I think it is a pile of trash. My motivation for this project is because it is a dependency of CPython, which is a dependency of the most active YouTube downloader, ytdlp.