title: Cmake can't find boost thread library
body: <p>I am trying to use boost thread for my project in a Ubuntu machine. I download boost 1.58.0 via apt-get in ubuntu and use Cmake for building the c++ project. </p>
  
  <p>In my CMakeLists.txt, I have</p>
  
  <pre><code>find_package(Boost 1.58.0 REQUIRED)
  include_directories( ${Boost_INCLUDE_DIR} )
  message(STATUS "Boost_INCLUDE_DIR: ${Boost_INCLUDE_DIR}")
  message(STATUS "Boost_LIBRARIES: ${Boost_LIBRARIES}")
  target_link_libraries( Sparse3D ${COLMAP_LIBRARIES} )
  </code></pre>
  
  <p>It turns out Cmake can't find the boost library</p>
  
  <pre><code>-- Boost_INCLUDE_DIR: /usr/include
  -- Boost_LIBRARIES: 
  </code></pre>
  
  <p>I then checked online and figured out that I may need to specify the library, and changed the CMakeLists.txt to</p>
  
  <pre><code>find_package(Boost 1.58.0 COMPONENTS system filesystem thread REQUIRED)
  </code></pre>
  
  <p>But CMake can't find boost_thread. Here is the CMake output:</p>
  
  <pre><code>-- Found Glew
  --   Includes : /usr/include
  --   Libraries : /usr/lib/x86_64-linux-gnu/libGLEW.so
  -- __cplusplus is 201103
  --   --&gt; Do not link with Boost.Thread
  -- Boost version: 1.58.0
  -- Boost include dirs: /usr/include
  -- Boost libraries:    
  CMake Error at /usr/share/cmake-3.5/Modules/FindBoost.cmake:1677 (message):
    Unable to find the requested Boost libraries.
  
    Boost version: 1.58.0
  
    Boost include path: /usr/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.
  Call Stack (most recent call first):
  CMakeLists.txt:20 (find_package)
  
  
  -- GLM_INCLUDE_DIR = /usr/local/include
  -- GLM included at /usr/local/include
  -- Boost_LIBRARIES: /usr/include
  -- Boost_LIBRARIES:
  </code></pre>
  
  <p>But libboost_thread.so.1.58.0 does exist in /usr/lib/x86_64-linux-gnu. 
  Thank you all in advance.</p>