title: "Mixed declaration and code" warning, is it worth addressing?
body: <p>I've recently enabled <code>-pedantic</code> option on gcc and now I've got about two or three pages of "ISO C90 forbids mixed declaration and code" warnings.</p>
  
  <p>My goal with this project is to be able to deploy it on any <em>mainstream</em> system with a c compiler, so I realize it wouldn't be wise to assume that C99 will be supported everywhere, but is it even worth my time to address these warnings?</p>
  
  <p>Are there still systems out there with c compilers that don't support mixed declaration and code?</p>