Cargo Features

webrtc-audio-processing-sys has no features set by default.

[dependencies]
webrtc-audio-processing-sys = { version = "0.4.0", features = ["derive_serde", "bundled"] }
derive_serde = serde
bundled

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.

serde derive_serde?