From 1e9595e1169a31b518d72c9c64e990a20faec869 Mon Sep 17 00:00:00 2001
From: pierzchalski <e.a.pierzchalski@gmail.com>
Date: Mon, 4 Apr 2016 19:44:38 +1000
Subject: [PATCH] Change build_helper to modify suffix of cc

This should help avoid issues when using tools like ccache.
---
 src/build_helper/lib.rs | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/build_helper/lib.rs b/src/build_helper/lib.rs
index 092a1cabc74..87e93afcf09 100644
--- a/src/build_helper/lib.rs
+++ b/src/build_helper/lib.rs
@@ -43,10 +43,16 @@ pub fn cc2ar(cc: &Path, target: &str) -> PathBuf {
     if target.contains("musl") || target.contains("msvc") {
         PathBuf::from("ar")
     } else {
+        let parent = cc.parent().unwrap();
         let file = cc.file_name().unwrap().to_str().unwrap();
-        cc.parent().unwrap().join(file.replace("gcc", "ar")
-                                      .replace("cc", "ar")
-                                      .replace("clang", "ar"))
+        for suffix in &["gcc", "cc", "clang"] {
+            if let Some(idx) = file.rfind(suffix) {
+                let mut file = file[..idx].to_owned();
+                file.push_str(suffix);
+                return parent.join(&file);
+            }
+        }
+        parent.join(file)
     }
 }