Cargo Features
classicube-sys has no features set by default.
[dependencies]
classicube-sys = { version = "4.0.0+classicube.1.3.7", features = ["no_std"] }
Features from optional dependencies
In crates that don't use the dep:
syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.