Configuration of pcl with cmake

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I am new to pcl and cmake..

So here am stuck in installation of pcl in linux_ubuntun14.04 ..

I had downloaded the pcl_master.zip from github. Besides I had also installed pcl through terminal sudo apt-get pcllibaries....

While trying an example it showing the following error..

CMake Error at CMakeLists.txt:5 (find_package):
  By not providing "FindPCL.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "PCL", but
  CMake did not find one.
  Could not find a package configuration file provided by "PCL" (requested
  version 1.2) with any of the following names:
    PCLConfig.cmake
    pcl-config.cmake
  Add the installation prefix of "PCL" to CMAKE_PREFIX_PATH or set "PCL_DIR"
  to a directory containing one of the above files.  If "PCL" provides a
  separate development package or SDK, be sure it has been installed.
-- Configuring incomplete, errors occurred!
See also "/home/iamlantern/Desktop/pcl_install/pcl-pcl-
1.7.2/examples/Proj/hdc/CMakeFiles/CMakeOutput.log".

Thanks for your patience and happy to follow your great suggestions....