Cargo Features

ferrous-serialport = { version = "4.0.2", default-features = false, features = ["libudev"] }
default = libudev

The libudev feature is set by default whenever ferrous-serialport is added without default-features = false somewhere in the dependency tree.

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.

libudev linux not musl default

Enables libudev ^0.2.0