rust toolchain

The rust toolchain tag on WindowsForum.com collects discussion of Rust as a build and development dependency in real projects. Coverage here centers on Canonical's Mir 2.30.0, where a Rust compiler became a hard requirement for building the Wayland compositor library from source, the old MIR_ENABLE_RUST build switch was removed, and the mirserver ABI moved to 69. The practical impact falls on developers, packagers, and maintainers of Mir-based shells rather than end users, and Canonical's roadmap points toward writing a complete compositor in Rust without C++. Expect thread-level detail on toolchain requirements, build configuration changes, and packaging consequences.