Possible to have short flag without a long flag?

[markdingo]

I'm probably missing something obvious, but how do I use pflag so that the only valid option is the short variant? That is, if I want just "-h" rather than something like "-h" and "--help"?

If I use:

flag.BoolVar(&help, "h", false, "Give help")

then Parse() requires --h

If I use:

flag.BoolVarP(&help, "", "h", false, "Give help")

then Parse() requires "-h" and the odd "--" whereas I was hoping an empty long-opt would have deactivated that variant.

I'm pretty sure that Posix/GNU do not insist on both variants of an option, but I've been wrong before.