Path get_user_data_dir(const std::string &appname);
/// Returns a directory containing system-wide configuration
-Path get_sys_conf_dir(const Path &argv0);
+Path get_sys_conf_dir(const std::string &argv0);
/// Returns a directory containing immutable system-wide data
-Path get_sys_data_dir(const Path &argv0, const std::string &appname);
+Path get_sys_data_dir(const std::string &argv0, const std::string &appname);
+
+/// Returns a directory containing system-wide architecture-specific files
+Path get_sys_lib_dir(const std::string &argv0, const std::string &appname);
/// Changes the current working directory
void chdir(const Path &);