title: Compilation error: "stddef.h: No such file or directory"
body: <p>Whenever I try to compile this code it always ends up with this error:</p>
  
  <pre><code>    In file included from /usr/include/wchar.h:6:0,
               from /usr/lib/gcc/i686-pc-cygwin/4.9.2/include/c++/cwchar:44,
               from /usr/lib/gcc/i686-pc-cygwin/4.9.2/include/c++/bits/postypes.h:40,
               from /usr/lib/gcc/i686-pc-cygwin/4.9.2/include/c++/iosfwd:40,
               from /usr/lib/gcc/i686-pc-cygwin/4.9.2/include/c++/ios:38,
               from /usr/lib/gcc/i686-pc-cygwin/4.9.2/include/c++/ostream:38,
               from /usr/lib/gcc/i686-pc-cygwin/4.9.2/include/c++/iostream:39,
               from test.cpp:1:
      /usr/include/sys/reent.h:14:20: fatal error: stddef.h: No such file or directory
      #include &lt;stddef.h&gt;
                  ^
      compilation terminated.
  </code></pre>
  
  <p>The code I was trying to compile is:</p>
  
  <pre><code>#include &lt;iostream&gt;
  using namespace std;
  
  int main()
  {
      cout &lt;&lt; "Hello World! :D";
      return 0;
  }
  </code></pre>