Automate building more ports

[mcandre]

I am excited to build as many ports of my applications as possible using zig's powerful cross-compilation system. As a Go programmer, I am used to tools like gox, goxcart, and xgo that automate the process of looping over available target triples, producing many different ports all at once.

What do you think of offering this functionality in the Zig build CLI? A flag like --all-targets or such would be helpful for quickly generating several binary ports. Ideally this would target only the stable target triples documented online.

https://github.com/ziglang/zig-bootstrap#supported-triples

Alternatively, the targets subcommand could be expanded to accept an optional --stable flag, which would limit the results to the stable triples.

Meanwhile, I could take a stab at writing a goxcart equivalent for Zig as a proof of concept. It's really just a for loop.

[ikskuh]

You can just do that with the zig build system already ;)

const targets = [_]std.zig.CrossTarget {
    …
};
for(targets) |target| {
    const exe = b.addExecutable("foo", "bar.zig");
    exe.setTarget(target);
    exe.install();
}

[andrewrk]

Sounds like a dupe of #3028