Adding a new target New targets typically start as Tier 3 and then can be promoted later. To propose addition of a new target, open a pull request on rust-lang/rust: - Copy the Tier 3 target policy to the description and fill it out, see example. - Add a new description for the target in src/doc/rustc/src/platform-support using the template. - Add the target to the SUMMARY.md (allows wildcards) and platform-support.md (must name all targets verbatim). Link to the created description page. - Ensure the pull request is assigned to a member of the Rust compiler team by commenting: r? compiler-team