rustup integration

[mcandre]

Thank you for working hard to port Rust to MINIX! Now that we have a preliminary patchset, could we add MINIX support to rustup, to make it easier for MINIX users to install Rust?

https://rustup.rs/

[ids1024]

You mean so it could be used just by running rustup target add i586-unknown-minix?

This requires a few things.

• Tidy up patches so they're suitable to send upstream; try to fix major issues
• Get libc crate patches merged into upstream
• Get rust patches merged upstream (tier 3 support)
• Get Minix std added to Rusts CI, etc. and distributed through rustup (tier 2 support)

The "tiers" of support for Rust are described at https://forge.rust-lang.org/platform-support.html

Then there's the question of having rustup distribute prebuilt compilers for Minix. I haven't even tried getting rustc to work on Minix yet.

I think getting the changes merged upstream should be realistic.

The Rust devs have also been fairly happy to add tier 2 support for std on platforms (for instance, Redox), but perhaps not in this case without more of a commitment to maintaining it than I can personally offer (if others get involved, that could change).

Distributing actual rustc binaries for Minix via rustup is infeasible for the foreseeable future because the compiler takes a long time to build and Rust doesn't have the CI capacity to easily add platforms.