Working with conditional compilation distinct from cargo features

[cameron1024]

When writing miri tests, it's common to have certain bits of code annotated with #[cfg(miri)].

If these attributes were using cargo features (like #[cfg(feature = "miri")]), I could get RA to turn this feature on with the cargo.features config parameter. However, I'm not sure what the equivalent config key is for plain --cfg features.

Apologies if this has been asked before, I had a look through old issues but could only find questions relating to #[cfg(feature = "...")]. Thanks 😁