cargo rustc --lib -- --crate-type cdylib results in crate required to be available in rlib format

[dvc94ch]

Building examples for android works great cargo rustc --example NAME -- --crate-type cdylib. When trying cargo rustc --lib -- --crate-type cdylib I get crate required to be available in rlib format.

I found multiple closed issues here related to this #7339 #6160, and was wondering what the correct approach is. Since the crate type can be set in the Cargo.toml I think a reasonable case can be made that overriding it from the cli is in the domain of cargo features (as opposed to it's a rustc flag we won't support it)

Related to #4881.

[ehuss]

I'm going to close this as a duplicate of #4881. If you have additional requirements of controlling the crate-type that aren't already captured in that issue, it is probably best to just add a comment over there.

[dvc94ch]

In case you hadn't noticed, #4881 is a feature request, this is a bug report. The difference is that the one requests something to be added while the other requests something to be removed.