title: How do you add libraries to Eclipse CDT? (No such file or directory)
body: <p>I'm having some issues adding header libraries. </p>
  
  <p>I right click on my project, and click <strong>Properties-> C/C++ General-> Paths and Symbols</strong>.</p>
  
  <p>In the <strong>Includes</strong> tab: <strong>Languages-> GNU C++</strong></p>
  
  <p>I click on <strong>Add... -> File system</strong> then add the folder called boost_1_52_0, or any other folder.</p>
  
  <p>When I use Eclipse's intellisense, it finds the  that I desire, however it fails on building.</p>
  
  <pre><code>fatal error: boost/random/...: No such file or directory
  </code></pre>
  
  <p>Not sure why this is happening.</p>
  
  <p>Any help just getting off the ground would be appreciated.</p>
  
  <pre><code>22:34:02 **** Incremental Build of configuration Default for project TestProj****
  make all 
  g++ -O2 -g -Wall -fmessage-length=0    -c -o TestProj.o TestProj.cpp
  TestProj.cpp:5:52: fatal error: boost/random/random_number_generator.hpp: No such file     or directory
  &lt;builtin&gt;: recipe for target `TestProj.o' failed
  compilation terminated.
  make: *** [TestProj.o] Error 1
  </code></pre>
  
  <p>Apparently it isn't as easy as adding a folder to the directory to the interfaces eclipse provides. I am in awe.</p>
  
  <p>Regards,
  Dane</p>