title: PCL Point-Cloud-Library cmake install error - OpenMP
body: <p>this is my first post so please be gentle!</p>
  
  <p>I'm getting what appear to be cmake errors when trying to configure an install of pcl 1.7 in OSX 10.8.5. The error which appears 18 times is:</p>
  
  <pre><code>Performing Test OpenMP_FLAG_DETECTED - Failed
  </code></pre>
  
  <p>and then after the 18 failed searches for OpenMP:</p>
  
  <pre><code>Could NOT find OpenMP (missing:  OpenMP_C_FLAGS OpenMP_CXX_FLAGS) 
  Not found OpenMP
  </code></pre>
  
  <p>I'm also getting a red error (using cmake GUI) stating:</p>
  
  <pre><code>CMake Error at cmake/Modules/FindEigen.cmake:25 (file):
    file Internal CMake error when trying to open file:
    /Library/Frameworks/Eigen.framework/Eigen/src/Core/util/Macros.h for
    reading.
  Call Stack (most recent call first):
    CMakeLists.txt:238 (find_package)
  </code></pre>
  
  <p>But then followed in black by:</p>
  
  <pre><code>Found Eigen: /Library/Frameworks/Eigen.framework  
  Eigen found (include: /Library/Frameworks/Eigen.framework, version: ..)
  </code></pre>
  
  <p>so perhaps this isn't the issue (also there are no references to Eigen in the CMakeError.log.</p>
  
  <p>Any help diagnosing or fixing the problem would be greatly appreciated.</p>
  
  <p>Thanks,
  Mark</p>