title: mingw gdb do not have layout command
body: <p>I am debuging a C++ program with gdb on windows using Mingw, But when I type <code>layout</code> command in gdb interactive command line:</p>
  
  <pre><code>(gdb) layout asm
  Undefined command: "layout".  Try "help".
  </code></pre>
  
  <p>the layout is not exists, how to fix that?</p>