>> The new feature should be present in SVN revision 1174561
>> or higher.  It
>> will detect when libcarddav or libcaldav are not present
>> and automatically
>> deactivate the affected resource(s).
>
> Not sure whether I understand correctly. I removed the libcaldav package
> and rebuilt kdepim. I have libical installed because I understood that the
> package is a requirement.
>
> FTBFS. Log attached.
>

Yes, you understood correctly.  See these lines in the build log:
> checking if caldav resource is allowed... yes
> checking for libcaldav... not found
> checking if carddav resource is allowed... yes
> checking for libcarddav... not found

Those mean that the carddav and caldav resources are disabled.

The build is failing at a point unrelated to libcarddav and libcaldav; let
me see what I can do to fix it.

Tim