title: Including STXXL library in the MakeFile
body: <p>I was trying to install STXXL library to a custom path following <a href="https://stackoverflow.com/a/34312041/937153">this</a> answer supplying prefix to <code>cmake</code> this way:</p>
  
  <p><code>cmake -DCMAKE_INSTALL_PREFIX=/usr . &amp;&amp; make all install</code> </p>
  
  <p>When I run the tests, they seems to be working fine. But I want to include STXXL in a different MakeFile and compile that project. In that MakeFile there a line </p>
  
  <p><code>STXXL_CONFIG     = /opt/stxxl/stxxl.mk</code></p>
  
  <p>I believe the configuration file <code>stxxl.mk</code> comes from the old <code>make</code> based installation (I couldn't locate it in my system either). I was wondering how I can modify this file to include STXXL library and get the custom project compiled. </p>
  
  <p>Without modifying the above statement in <code>MakeFile</code>, I am getting the error: </p>
  
  <p><code>undefined reference to 'stxxl::get_next_seed()' collect2: error: ld returned 1 exit status</code></p>
  
  <p>It goes without saying that I don't have root access and unfortunately, neither a good background with MakeFiles. This is not a duplicate of <a href="https://stackoverflow.com/q/9558648/937153">Makefile with STXXL</a></p>