title: c library defines of int8_t
body: <p>From stdint.h the following</p>
  
  <pre><code>#ifndef int8_t
  
      typedef signed char int8_t;
      #define int8_t int8_t
      #define INT8_MIN (-128)
      #define INT8_MAX (127)
  
  #endif
  </code></pre>
  
  <p>What does the <code>#define int8_t int8_t</code> do or define ?</p>