Cargo Features

[dependencies]
static_leak = { version = "0.1.0", default-features = false, features = ["std", "async-std", "spin"] }
default = std

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

std default
async-std

Enables async-std

spin

Enables spin

static_leak has 4 features without comments.