use std::env::var;
fn main() {
let link_type = env_or_default("CARGO_BLAS_TYPE", "dylib");
let link_name = env_or_default("CARGO_BLAS", "blas");
println!("cargo:rustc-link-lib={}={}", link_type, link_name);
}
fn env_or_default(var_name: &str, default: &str) -> String {
match var(var_name) {
Ok(s) => s,
Err(_) => default.into(),
}
}