bug#29713: 26.0; Provide completion for `make-frame-on-display'

[Basil L. Contovounesios]

Juri Linkov <juri@linkov.net> writes:

>> Maybe fall back to previous implementation replaced by x-display-list
>> in 0746a9e275d, i.e.
>>
>>   (if (fboundp 'x-display-list)
>>       (x-display-list)
>>     (delete-dups
>>      (mapcar (lambda (frame)
>>                (frame-parameter frame 'display))
>>              (frame-list))))
>
> Or maybe better to fall back to 'make-frame'?
> I.e. don't signal an error, don't ask a question,
> just create a new frame on the current display.
>
> So on --without-x builds, make-frame-on-display
> could be like an alias to make-frame.

I have no strong preference between this option or just signalling an
error in the interactive spec.  What do others think?

Thanks,

-- 
Basil