Cargo Features

[dependencies]
xxhrs = { version = "2.0.0", default-features = false, features = ["random_entropy"] }
default = random_entropy

The random_entropy feature is set by default whenever xxhrs is added without default-features = false somewhere in the dependency tree.

random_entropy default = getrandom

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.

getrandom random_entropy