catkin can't find PCLConfig.cmake

edit

So I did the standard catkin_create_pkg with PCL as a dependency and I'm getting this with catkin_make:

CMake Error at /opt/ros/hydro/share/catkin/cmake/catkinConfig.cmake:72 (find_package):
  Could not find a configuration file for package PCL.

  Set PCL_DIR to the directory containing a CMake configuration file for PCL.
  The file will have one of the following names:

    PCLConfig.cmake
    pcl-config.cmake

Call Sta-name>ck (most recent call first):
  <proj/CMakeLists.txt:8 (find_package)


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

Just doing some basic file searching, I believe that all of the cmake config files are in /opt/ros/hydro/share - is that correct?

If so - here are a couple of directories that seem relevant:

ls -l /opt/ros/hydro/share/pcl
total 4
-rw-r--r-- 1 root root 1480 Jul 23 18:43 package.xml

ls -l /opt/ros/hydro/share/pcl-1.7/
total 32
-rw-r--r-- 1 root root 27024 Aug 23 15:37 PCLConfig.cmake
-rw-r--r-- 1 root root   431 Aug 23 15:37 PCLConfigVersion.cmake

What should I do to catkin to make it realize these files are in front of its face?

Alternatively - how do I do the short term thing and night PCL_DIR? I tried this at one point above the find_packages line in my CMakeLists.txt :

set(pcl_DIR "/opt/ros/hydro/share/pcl-1.7/")

but it didn't do anything :(

Thanks for any help!