Cargo Features

[dependencies]
icns = { version = "0.3.1", default-features = false, features = ["pngio"] }
default = pngio

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

pngio default = png

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.

png pngio

Enables png ^0.16