vendor/parking_lot_core/build.rs

   1 extern crate rustc_version;
   2 use rustc_version::{version, Version};
   3
   4 fn main() {
   5     if version().unwrap() >= Version::parse("1.26.0").unwrap() {
   6         println!("cargo:rustc-cfg=has_localkey_try_with");
   7     }
   8 }