title: compile error cygwin regex.h no such file or directory
body: <p>Hello I am trying to compile the following code TextRank (Mihalcea &amp; Tarau, 2004)
  <a href="http://www.utdallas.edu/~saidul/code.html" rel="nofollow">http://www.utdallas.edu/~saidul/code.html</a></p>
  
  <p>On cygwin. When i compile I get the following error: regex.h no such file or directory. How can i add regex.h to cygwin?
  And is it possible to compile on codeblock?</p>
  
  <p>These are the instructions to run it:</p>
  
  <h2>How to compile and run</h2>
  
  <p>After unzipping the code, open a shell, go to the code directory, and type the following command to compile the code.</p>
  
  <p>./compile.sh</p>
  
  <p>Once compiled, the code can be executed using the following command.</p>
  
  <p>./TextRank paramsTextRank.txt</p>