Since nvidia currently does not provide any OpenCl examples, I'm hosting the latest OpenCl examples from Cuda version 4.2.9 here.
And it just the files download from http://streamcomputing.eu/downloads/?Nvidia_OpenCL_SDK_4_2_Linux.zip
Copy the Nvidia lib files to shared/lib and
links files like
ln -s /usr/lib64/libglut.so.3 /usr/lib64/libglut.so
...
Then make