smithay/anvil/build.rs

use std::env::var;

fn main() {
    if var("CARGO_FEATURE_LOGIND").ok().is_none() {
        println!("cargo:warning=You are compiling anvil without logind support.");
        println!("cargo:warning=This means that you'll likely need to run it as root if you want to launch it from a tty.");
        println!("cargo:warning=To enable logind support add `--feature logind` to your cargo invocation:");
        println!("cargo:warning=$ cd anvil; cargo run --feature logind");
    }
}