title: CMake does not find boost_thread
body: <p>I am trying to install the OpenGM library. However, while using CMake, I get the following error:</p>
  
  <pre><code> CMake Error at /usr/local/share/cmake-3.6/Modules/FindBoost.cmake:1753 (message):
     Unable to find the requested Boost libraries.
  
     Boost version: 1.62.0
  
     Boost include path: /usr/local/include
  
     Could not find the following Boost libraries:
  
             boost_thread
  
     Some (but not all) of the required Boost libraries were found.  You may
     need to install these additional Boost libraries.  Alternatively, set
     BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT
     to the location of Boost.
  </code></pre>
  
  <p>However, when I do:</p>
  
  <pre><code>ls -l 
  </code></pre>
  
  <p>in</p>
  
  <pre><code>/usr/local/include
  </code></pre>
  
  <p>I get the following line:</p>
  
  <pre><code> lrwxr-xr-x   1 Florian  admin   36 13 oct 19:11 boost -&gt; ../Cellar/boost/1.62.0/include/boost
  </code></pre>
  
  <p>which suggests that it looks in the right directory.</p>
  
  <p>In:</p>
  
  <pre><code>/usr/local/lib
  </code></pre>
  
  <p>I have:</p>
  
  <pre><code>libboost_thread-mt.a            
  libboost_thread-mt.dylib
  </code></pre>
  
  <p>So, it seems that the boost_thread library does exist...</p>
  
  <p>Regarding the CMake configuration related to Boost, I have:</p>
  
  <pre><code> Boost_DIR                        Boost_DIR-NOTFOUND                           
   Boost_INCLUDE_DIR                /usr/local/include                           
   Boost_LIBRARY_DIR_DEBUG          /usr/local/lib                               
   Boost_LIBRARY_DIR_RELEASE        /usr/local/lib                               
   Boost_PYTHON_LIBRARY_DEBUG       /usr/local/lib/libboost_python.dylib         
   Boost_PYTHON_LIBRARY_RELEASE     /usr/local/lib/libboost_python.dylib
  </code></pre>
  
  <p>If it can help, I am under Mac OSX and Boost was installed through:</p>
  
  <pre><code>brew install boost --with-python
  brew install boost-python
  </code></pre>