How to specify a certain version of rustc

[hellow554]

What information should I include in my recipe, do tell yocto which version of rust it should use? E.g. I want my code to compile with Rust 1.43.0, (e.g. because of a regression).

[nastevens]

@hellow554 You can use PREFERRED_VERSION for the rust-bin-cross-* and cargo-bin-cross-* recipes. For example, if my target is ARM:

PREFERRED_VERSION_rust-bin-cross-arm ?= "1.43.0"
PREFERRED_VERSION_cargo-bin-cross-arm ?= "${PREFERRED_VERSION_rust-bin-cross-arm}"

[hellow554]

Thanks! Would this something for the readme?