8.0 kernel fails to build if some USB drivers are trimmed out; error in /sys/conf/files

[Scot Hetzel]

On 11/26/09, Jeremy Chadwick <freebsd at jdc.parodius.com> wrote:
>  I don't think parenthesis are the core of the problem, given that there
>  are many other devices in /sys/conf/files which utilise said method.
>
There are only 2 places in the /sys/conf/files which use this method,
and both of them are for usb drivers:

# USB ethernet drivers
#
dev/usb/net/if_aue.c            optional aue
dev/usb/net/if_axe.c            optional axe
dev/usb/net/if_cdce.c           optional cdce
dev/usb/net/if_cue.c            optional cue
dev/usb/net/if_kue.c            optional kue
dev/usb/net/if_rue.c            optional rue
dev/usb/net/if_udav.c           optional udav
dev/usb/net/usb_ethernet.c \
        optional (aue | axe | cdce | cue | kue | rue | udav)
:
# USB serial and parallel port drivers
#
dev/usb/serial/u3g.c            optional u3g
dev/usb/serial/uark.c           optional uark
dev/usb/serial/ubsa.c           optional ubsa
dev/usb/serial/ubser.c          optional ubser
dev/usb/serial/uchcom.c         optional uchcom
dev/usb/serial/ucycom.c         optional ucycom
dev/usb/serial/ufoma.c          optional ufoma
dev/usb/serial/uftdi.c          optional uftdi
dev/usb/serial/ugensa.c         optional ugensa
dev/usb/serial/uipaq.c          optional uipaq
dev/usb/serial/ulpt.c           optional ulpt
dev/usb/serial/umct.c           optional umct
dev/usb/serial/umodem.c         optional umodem
dev/usb/serial/umoscom.c        optional umoscom
dev/usb/serial/uplcom.c         optional uplcom
dev/usb/serial/uslcom.c         optional uslcom
dev/usb/serial/uvisor.c         optional uvisor
dev/usb/serial/uvscom.c         optional uvscom
dev/usb/serial/usb_serial.c     optional ucom | \
        (u3g | uark | ubsa | ubser | uchcom | ucycom | ufoma | uftdi |
ugensa | uipaq | ulpt | umct | umodem | umoscom | uplcom | uslcom |
uvisor | uvscom)

It would be interesting if this also breaks for compiling 'USB serial
and parallel port drivers' into the kernel.

Scot