problem with linking kernel in 5.1 release by adding device umodem

[Lowell Gilbert]

Roman Neuhauser <neuhauser at bellavista.cz> writes:

> # utzkul at gmx.li / 2003-07-05 17:56:02 +0200:
> > linking kernel
> > umodem.o: In function `umodem_attach':
> > umodem.o(.text+0x4aa): undefined reference to `ucom_attach'
> > umodem.o: In function `umodem_intr':
> > umodem.o(.text+0x75d): undefined reference to `ucom_status_change'
> > umodem.o: In function `umodem_detach':
> > umodem.o(.text+0xcfd): undefined reference to `ucom_detach'
> > umodem.o(.data+0x70): undefined reference to `ucom_devclass'
> > *** Error code 1
> > 
> > if i exclude the device umodem it works fine but i need it!!!!
> 
>     don't ignore the instructions and it'll work.

I'm not sure where the instructions are supposed to come from.  On
4.x, the LINT file tells you that you need "device usb" for all USB
support, but there is no LINT on 5.x.  As a 4.x user trying to give
advice to 5.x users, where can I point people to for those instructions?