Lib.rs

Cargo Features

[dependencies]
arpack-ng-sys = { version = "0.2.1", default-features = false, features = ["static", "system"] }

default = static

The static feature is set by default whenever arpack-ng-sys is added without default-features = false somewhere in the dependency tree.

static default = cmake

system = pkg-config

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

pkg-config build system?