Cargo Features

[dependencies]
libsvm-sys2 = { version = "4.0.0", default-features = false, features = ["codegen", "link"] }
default = link

The link feature is set by default whenever libsvm-sys2 is added without default-features = false somewhere in the dependency tree.

codegen = 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.

bindgen build codegen?

Enables bindgen ^0.59.2