Errors while installing openni_launch package for ROS Hydro in OS X 10.8

gistfile1.txt

Base path: /Users/Siva/openni_ws
Source space: /Users/Siva/openni_ws/src
Build space: /Users/Siva/openni_ws/build
Devel space: /Users/Siva/openni_ws/devel
Install space: /Users/Siva/openni_ws/install
####
#### Running command: "cmake /Users/Siva/openni_ws/src -DCATKIN_DEVEL_PREFIX=/Users/Siva/openni_ws/devel -DCMAKE_INSTALL_PREFIX=/Users/Siva/openni_ws/install" in "/Users/Siva/openni_ws/build"
####
-- Using CATKIN_DEVEL_PREFIX: /Users/Siva/openni_ws/devel
-- Using CMAKE_PREFIX_PATH: /Users/Siva/ros_catkin_ws/install_isolated
-- This workspace overlays: /Users/Siva/ros_catkin_ws/install_isolated
-- Using PYTHON_EXECUTABLE: /usr/bin/python
-- Python version: 2.7
-- Using default Python package layout
-- Using CATKIN_ENABLE_TESTING: ON
-- Call enable_testing()
-- Using CATKIN_TEST_RESULTS_DIR: /Users/Siva/openni_ws/build/test_results
-- Found gtest: gtests will be built
-- catkin 0.5.86
-- BUILD_SHARED_LIBS is on
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- ~~  traversing 3 packages in topological order:
-- ~~  - openni_camera
-- ~~  - openni_launch
-- ~~  - rgbd_launch
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- +++ processing catkin package: 'openni_camera'
-- ==> add_subdirectory(openni_camera)
-- Boost version: 1.55.0
-- Found the following Boost libraries:
--   system
--   filesystem
--   thread
-- checking for module 'libopenni'
--   package 'libopenni' not found
CMake Error at /usr/local/Cellar/cmake/2.8.12.2/share/cmake/Modules/FindPkgConfig.cmake:279 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/local/Cellar/cmake/2.8.12.2/share/cmake/Modules/FindPkgConfig.cmake:333 (_pkg_check_modules_internal)
  openni_camera/CMakeLists.txt:8 (pkg_check_modules)


-- +++ processing catkin package: 'openni_launch'
-- ==> add_subdirectory(openni_launch)
-- +++ processing catkin package: 'rgbd_launch'
-- ==> add_subdirectory(rgbd_launch)
-- Configuring incomplete, errors occurred!
See also "/Users/Siva/openni_ws/build/CMakeFiles/CMakeOutput.log".
Invoking "cmake" failed