Cargo Features

[dependencies]
chromaprint_sys = { version = "1.0.1", default-features = false, features = ["dynamic", "static"] }
default = dynamic

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

dynamic default = metadeps
static = cmake

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.

cmake build static?
metadeps build dynamic