Only run ranlib when necessary

src/archive.rs

@@ -220,6 +220,7 @@ impl<'a> ArchiveBuilder<'a> for ArArchiveBuilder<'a> {
         // Finalize archive
         std::mem::drop(builder);
 
+        if self.update_symbols {
             // Run ranlib to be able to link the archive
             let status = std::process::Command::new("ranlib")
                 .arg(self.config.dst)
@@ -230,6 +231,7 @@ impl<'a> ArchiveBuilder<'a> for ArArchiveBuilder<'a> {
                 self.config.sess.fatal(&format!("Ranlib exited with code {:?}", status.code()));
             }
         }
+    }
 }
 
 impl<'a> ArArchiveBuilder<'a> {