Merge pull request #27 from brson/next

Replace StaticMutex. Fixes #26

Author: alexcrichton

Cargo.toml

@@ -11,3 +11,6 @@ A library to run the pkg-config system tool at build time in order to be used in
 Cargo build scripts.
 """
 keywords = ["build-dependencies"]
+
+[dev-dependencies]
+lazy_static = "0.2"

tests/test.rs

@@ -1,13 +1,15 @@
-#![feature(static_mutex)]
-
 extern crate pkg_config;
+#[macro_use]
+extern crate lazy_static;
 
 use pkg_config::Error;
 use std::env;
-use std::sync::{StaticMutex, MUTEX_INIT};
+use std::sync::Mutex;
 use std::path::PathBuf;
 
-static LOCK: StaticMutex = MUTEX_INIT;
+lazy_static! {
+    static ref LOCK: Mutex<()> = Mutex::new(());
+}
 
 fn reset() {
     for (k, _) in env::vars() {