Re: emacs26, ucs-normalize.el, Symbol’s function definition is void: regexp-opt-charset

[Paul Eggert]

On 2/13/19 7:37 PM, Eli Zaretskii wrote:
> > -(eval-when-compile (require 'cl-lib))
> > +(eval-when-compile
> > +  (require 'cl-lib)
> > +  (require 'regexp-opt))
> I think it would be better to add the 'require' in the same
> eval-when-compile form which calls regexp-opt-charset.

There's more than one such form. At some point it's easier to treat 
regexp-opt functions like cl-lib functions, i.e., available to any code 
within an eval-when-compile in that module.