Adding rpath support

Author: eulegang

src/lib.rs

@@ -98,6 +98,7 @@ pub struct Library {
     pub frameworks: Vec<String>,
     pub framework_paths: Vec<PathBuf>,
     pub include_paths: Vec<PathBuf>,
+    pub rpaths: Vec<PathBuf>,
     pub defines: HashMap<String, Option<String>>,
     pub version: String,
     _priv: (),
@@ -557,6 +558,7 @@ impl Library {
             libs: Vec::new(),
             link_paths: Vec::new(),
             include_paths: Vec::new(),
+            rpaths: Vec::new(),
             frameworks: Vec::new(),
             framework_paths: Vec::new(),
             defines: HashMap::new(),
@@ -667,6 +669,13 @@ impl Library {
                         self.include_paths.push(PathBuf::from(inc));
                     }
                 }
+                "-rpath" => {
+                    if let Some(rpath) = iter.next() {
+                        let meta = format!("rustc-link-arg=-Wl,-rpath,{}", rpath);
+                        config.print_metadata(&meta);
+                        self.rpaths.push(PathBuf::from(rpath));
+                    }
+                }
                 _ => (),
             }
         }

tests/rpath.pc

@@ -0,0 +1,7 @@
+prefix=/usr/local
+
+Name: rpath
+Version: 4.2.0
+Description: RPath example library
+Libs: -L${prefix}/lib -Wl,-rpath,${prefix}/lib -lrpath
+Cflags: -I${prefix}/include

tests/test.rs

@@ -311,3 +311,11 @@ fn range_version_full() {
         .probe("escape")
         .unwrap();
 }
+
+#[test]
+fn rpath() {
+    let _g = LOCK.lock();
+    reset();
+    let lib = find("rpath").unwrap();
+    assert!(lib.rpaths.contains(&PathBuf::from("/usr/local/lib")));
+}