The [perlpod](https://perldoc.perl.org/perlpod) documentation says you can `L<link to something>` but it does not indicate the proper way to reference a Perl-core function (or if it does, it wasn't obvious to me).

Specifically, I want to link to what is shown by `perldoc -f wantarray`. What is the proper way to `L<...>` link to it so it will take you to the `wantarray` documentation when you click on the link from MetaCPAN and other POD viewers that follow links?

(Note that `wantarray` is just a built-in Perl function like `print` or `open`.)