title: How to find definition of structure when reading c program on linux?
body: <p>I am reading source code of <code>xl2tpd</code>, and face lots of problems when reading this code. For example I cannot find where the structure <code>lac</code> is defined. How do I find the definition of this structure? </p>
  
  <p>I have used ctags and vim to read this code, but failed to find the structure. I googled and could not find the structure. Is there any method that can make the code reading process more comfortable? That is, I can jump to definition of most variables, functions and structures?</p>