Could not resolve keysym, clarification

Are the warnings

The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Could not resolve keysym XF86BrightnessAuto

(and dozens more) supposed to go away, once we correctly rebuild xkbcomp, libX11 after xorgproto? if so, is there other stuff that needs rebuild? is one supposed to use 2021.4 or 2021.4.99.2 at the moment?

I have in mind xorg/app/xkbcomp@c8cfca25 @whot

Thanks.

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