title: how to use tclap in cmake project
body: <p>I'm new to tclap and cmake</p>
  
  <ol>
  <li><p>Why does tclap need to be configured before installation? I though it just consisted of header files? </p></li>
  <li><p>How would I include the tclap library in a cmake project. Can't I just copy the header files into a lib directory or something (and modify CMakeLists as needed)? </p></li>
  </ol>
  
  <p>Im scratching my head at all this. By the way I found this <a href="https://github.com/lantiga/CLILibraries/tree/master/tclap" rel="noreferrer">library</a> that includes tclap in it and it looks like the authors are using cmake. Can I just copy the cmake relevant files and modify them slightly, maybe? Am I right in thinking that cmake initiates tclaps own configuration process in this case? </p>
  
  <p>Help me please.</p>