Added workaround for Invalid cross-device link error

src/usages_clang.cpp

@@ -737,7 +737,12 @@ void Usages::Clang::write_cache(const boost::filesystem::path &path, const Clang
       stream.close();
       boost::filesystem::rename(tmp_file, full_cache_path, ec);
       if(ec) {
-        boost::filesystem::copy_file(tmp_file, full_cache_path, boost::filesystem::copy_options::overwrite_existing);
+        boost::filesystem::copy_file(tmp_file, full_cache_path, boost::filesystem::copy_options::overwrite_existing, ec);
+        if(ec) { // Workaround for Invalid cross-device link error
+          std::ifstream from(tmp_file.string(), std::ios::binary);
+          std::ofstream to(full_cache_path.string(), std::ios::binary);
+          to << from.rdbuf();
+        }
         boost::filesystem::remove(tmp_file, ec);
       }
     }