This field tells cargo about errno's MSRV. It was added with Rust 1.56. Older versions will print a warning about an unknown field if errno is the top-level build job. If errno is merely compiled as a dependency, no warning is printed.
Even though errno's MSRV is currenlty 1.48, it would be good to make this metadata available in a standarized machine-readable format.
This field tells cargo about errno's MSRV. It was added with Rust 1.56. Older versions will print a warning about an unknown field if errno is the top-level build job. If errno is merely compiled as a dependency, no warning is printed.
Even though errno's MSRV is currenlty 1.48, it would be good to make this metadata available in a standarized machine-readable format.