title: CMake Warning: Cannot generate a safe linker search path for target
body: <p>While running CMake for a pcl project I got a warning message:</p>
  
  <pre><code>-- Configuring done
  CMake Warning at CMakeLists.txt:12 (add_executable):
    Cannot generate a safe linker search path for target
    handgenerator_output_to_pcd because files in some directories may conflict
    with libraries in implicit directories:
  
      link library [libboost_system.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
        /usr/local/lib
      link library [libboost_filesystem.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
        /usr/local/lib
      link library [libboost_thread.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
        /usr/local/lib
      link library [libboost_date_time.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
        /usr/local/lib
      link library [libboost_iostreams.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
        /usr/local/lib
      link library [libboost_serialization.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
        /usr/local/lib
      link library [libboost_chrono.so] in /usr/lib/x86_64-linux-gnu may be hidden by files in:
        /usr/local/lib
  
    Some of these libraries may not be found correctly.
  
  -- Generating done
  </code></pre>
  
  <p>How do I resolve this?</p>