Cargo Features

pq-sys has no features set by default.

[dependencies]
pq-sys = { version = "0.5.0", features = ["bundled", "buildtime_bindgen", "pkg-config"] }
bundled = pq-src
buildtime_bindgen build

Enables bindgen

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.

pq-src bundled?
pkg-config build implicit feature