Missing /dev/io on rpi3 running 12-stable

[bob prohaska]

On Wed, May 20, 2020 at 07:09:11PM +0200, Mika??l Urankar wrote:
> Le mer. 20 mai 2020 ?? 18:46, bob prohaska <fbsd at www.zefox.net> a ??crit :
> >
> > Is there supposed to be a /dev/io by default in FreeBSD on a Pi3?
> > Attempts to start X under 12.1-STABLE r361271 GENERIC fail with
> > a report of "failed to open /dev/io". There is indeed no /dev/io,
> > but there's also no /dev/io on a pi2 running 12-stable.
> >
> > Nor does there seem to be  a kernel module with matching name....
> >
> > Thanks for reading!
> >
> > bob prohaska
> 
> I haven't looked closely but it seems the error is in
> x11-servers/xorg-server/files/configure.ac, AC_DEFINE(USE_DEV_IO)
> 

Alas, the remedy does not suggest itself, at least not to me....

Can somebody offer a hint?

Thanks for writing!

bob prohaska