title: In what library is strcat_s?
body: <p>I tried including <code>string.h</code> and <code>stdlib.h</code>, but still get undefined reference compile errors.</p>
  
  <p>This leads me to conclude that it is in a different library that I didn't include. Where is it?</p>
  
  <p>I am using gcc compiler - the code is written in Windows, but is going to be compiled and run on a unix server.</p>