Rust Crate support

A list of the available Crate binaries: https://conan.compiler-explorer.com/libraries_rust.html

Some notes:

• Rust libraries are supported through pre-built binaries for the default platform x86_64.
• None of the libraries are available for other platforms, and they will not be built automatically.
• We have not tested all the libraries. If anything seems out of the ordinary, let us know so that we can investigate.
• Be sure to select the library you want to use and then also use extern crate cratename; in your code

The crate binaries are mostly built by Cargo with the --all-features option. This means that either the create successfully built with all features are enabled, or it failed to build and the crate is not available. We have a limited selection of crates without any features enabled because --all-features failed to build, but not yet consistently.

[ojeda]

Thanks a lot for this!

Be sure to select the library you want to use and then also use extern crate cratename; in your code

Or compile with --edition=2021 instead (or --edition=2018). Maybe this should be the default: https://github.com/compiler-explorer/compiler-explorer/issues/3765.

I also noticed the crates do not seem to be available in nightly nor beta: https://github.com/compiler-explorer/compiler-explorer/issues/3766.

[chrismooredev]

Noting for anyone from Google - Using rustc 1.62 still works for using the top 100 crates.

Since this is still an active issue, it should also be noted that we unfortunately can’t use any nightly or unstable features (like std::hint::black_box) with external crates.