title: strcpy_s not working with gcc
body: <p>I have a C++11 project, and I added some <code>strcpy_s</code> method calls.
  This works on windows, but when compiling on gcc, there is an error
  stating that <code>strcpy_s</code> symbol is not found.</p>
  
  <p>I did add the line</p>
  
  <p><code>#define __STDC_WANT_LIB_EXT1__ 1</code></p>
  
  <p>to the code, to no avail.</p>