Re: ia64 r260914 GENERIC kernel: /usr/src/sys/dev/vt/vt_core.c:261: undefined reference to kbd_get_keyboard and so on

>From jhb_at_freebsd.org Fri Feb 28 20:57:59 2014
>
>On Friday, February 28, 2014 9:23:28 am Anton Shterenlikht wrote:
>> ia64 r260914 GENERIC kernel contains:
>> 
>> device          kbdmux          # keyboard multiplexer
>> device          vt              # Virtual terminals
>> device          vt_vga          # VGA terminal device
>> 
>> Trying to build it, I get:
>
>Try this:
>
>Index: conf/files.ia64
>===================================================================
>--- conf/files.ia64     (revision 262614)
>+++ conf/files.ia64     (working copy)
>_at__at_ -52,7 +52,7 _at__at_
> dev/fb/vga.c                   optional        vga
> dev/hwpmc/hwpmc_ia64.c         optional        hwpmc
> dev/io/iodev.c                 optional        io
>-dev/kbd/kbd.c                  optional        atkbd | sc | ukbd
>+dev/kbd/kbd.c                  optional        atkbd | sc | ukbd | vt
> dev/syscons/scterm-teken.c     optional        sc
> dev/syscons/scvgarndr.c                optional        sc vga
> dev/syscons/scvtb.c            optional        sc
>

yes, I can build and install kernel with patch.
On reboot, the booting information is no longer
shown on serial console, just:

Booting [/boot/kernel/kernel]...               
Entering /boot/kernel/kernel at 0x9ffc000000010500...

FreeBSD/ia64 (mech-as221.men.bris.ac.uk) (ttyu1)

login: 

This is probably the default vt behaviour?
I need to be able to see thing progressing
in the serial console. How can I do this?
Or do I need to disable vt for this?

Anyway, I can find neither vt nor vt_vga
man pages on r260914 system. Is this expected?

Many thanks

Anton