Cargo Features

[dependencies]
fs4 = { version = "0.11.1", default-features = false, features = ["sync", "async-std", "tokio", "smol", "fs-err", "fs-err-tokio"] }
default = sync

The sync feature is set by default whenever fs4 is added without default-features = false somewhere in the dependency tree.

sync default
async-std

Enables async-std

tokio

Enables tokio

smol

Enables smol

fs-err fs-err-tokio?

Enables io_safety of fs-err ^2

fs-err-tokio = fs-err

Enables tokio of fs-err ^2

fs4 has 7 features without comments.