catkin_package() include dir neither an absolute directory nor exists relative to workspace

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I am trying to convert camera1394 to catkin. My working repository is this master branch.

Perhaps foolishly, I am attempting this migration by hand, using only the documentation I can find on-line. That has not been easy or pleasant, but I wanted to see if I could do it.

When trying to build by itself on Precise in a catkin workspace based on Groovy, I get this failure:

$ catkin_make
Base path: /home/joq/ros/hydro
Source space: /home/joq/ros/hydro/src
Build space: /home/joq/ros/hydro/build
Devel space: /home/joq/ros/hydro/devel
Install space: /home/joq/ros/hydro/install
####
#### Running command: "cmake /home/joq/ros/hydro/src -DCATKIN_DEVEL_PREFIX=/home/joq/ros/hydro/devel -DCMAKE_INSTALL_PREFIX=/home/joq/ros/hydro/install" in "/home/joq/ros/hydro/build"
####
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Using CATKIN_DEVEL_PREFIX: /home/joq/ros/hydro/devel
-- Using CMAKE_PREFIX_PATH: /opt/ros/groovy
-- This workspace overlays: /opt/ros/groovy
-- Found PythonInterp: /usr/bin/python (found version "2.7.3")
-- Looking for include files CMAKE_HAVE_PTHREAD_H
-- Looking for include files CMAKE_HAVE_PTHREAD_H - found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE 
-- Found gtest sources under '/usr/src/gtest': gtests will be built
-- catkin 0.5.63
-- BUILD_SHARED_LIBS is on
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- ~~  traversing packages in topological order:
-- ~~  - camera1394
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- +++ processing catkin package: 'camera1394'
-- ==> add_subdirectory(camera1394)
-- Boost version: 1.46.1
-- Found the following Boost libraries:
--   thread
-- checking for module 'libdc1394-2'
--   found libdc1394-2, version 2.2.0
-- dynamic_reconfigure built cfg/Camera1394.cfg: Generating reconfiguration files for Camera1394 in camera1394
CMake Error at /opt/ros/groovy/share/catkin/cmake/catkin_package.cmake:266 (message):
  catkin_package() include dir '/home/joq/ros/hydro/devel/include' is neither
  an absolute directory nor exists relative to
  '/home/joq/ros/hydro/src/camera1394'
Call Stack (most recent call first):
  /opt/ros/groovy/share/catkin/cmake/catkin_package.cmake:78 (_catkin_package)
  camera1394/CMakeLists.txt:34 (catkin_package)


-- Configuring incomplete, errors occurred!
Invoking "cmake" failed

I don't know how to set this. The camera1394 package has no include/ subdirectory, since it exports no header files. I've tried many different ideas, but really have no clear concept what this message is complaining about.