title: How to make use of the GCC fixed-point types extension on ARM Cortex-M?
body: <p>I am using a ARM Cortex-M3, and a Cortex-M4. I want to make use of GCC's <a href="http://gcc.gnu.org/onlinedocs/gcc/Fixed_002dPoint.html#Fixed_002dPoint" rel="nofollow noreferrer">fixed-point type extension</a>. I am using the <em>summon-arm-toolchain</em>. The following line of code</p>
  
  <pre><code>_Fract f = 0.1;
  </code></pre>
  
  <p>throws the following compile error:</p>
  
  <pre><code>error: fixed-point types not supported for this target
  </code></pre>
  
  <p>Does GCC really not support the fixed-point types for Cortex-M3/M4, or am I missing something here?</p>