Cargo Features

[dependencies]
hash-roll = { version = "0.3.0", default-features = false, features = ["mii", "zstd"] }
default = bup, buzhash, fastcdc, gear, gzip, mii, pigz, ram, zpaq, zstd

These default features are set whenever hash-roll is added without default-features = false somewhere in the dependency tree.

bup buzhash fastcdc gear gzip mii default
pigz ram zpaq zstd default

hash-roll has 3 features without comments.