Re: cargo-build-system: cargo-build-flags: --cfg=unix in package recipe

[David Craven]

> Aha! It can - if one uses propagated-inputs in the package recipes. I think 
> the importer should propagate inputs if the current package is 
> Rust-source-only. Otherwise packages further down the dependency graph 
> (further to the clients) won't compile later.

One of the ideas behind the [replace] stuff in the Cargo.toml file was
to retain the required dependencies.

> However, some of the Rust crates have a "windows" target which fails.
> For these I'd like to pass "--cfg=unix" and I'd like to put it into the 
> package recipe and not hardcode it into the build system.

Nice, didn't know about this flag. That explains why it refused to
build without the windows dependencies.