namespace Alert {
/// show an alert message
-void alert(string const & s1, string const & s2 = string(),
- string const & s3 = string());
+void alert(string const & title, string const & s1 = string(),
+ string const & s2 = string());
/// show an alert message and strerror(errno)
void err_alert(string const & s1, string const & s2 = string());