Cargo Features

[dependencies]
wasi-embedded-hal = { version = "0.2.0", default-features = false, features = ["use_std", "use_alloc"] }
default = use_std

The use_std feature is set by default whenever wasi-embedded-hal is added without default-features = false somewhere in the dependency tree.

use_std default = use_alloc
use_alloc use_std

wasi-embedded-hal has 3 features without comments.