"There is no portable way to check whether the parameter is a string constant" Well, the compiler should warn you if you try to pass a (char const ＊) to a func

"There is no portable way to check whether the parameter is a string constant" Well, the compiler should warn you if you try to pass a (char const ＊) to a function expecting a (char ＊). Use -Wwrite-strings to make string literals have type (char const[]) rather than (char[]).