title: swprintf and vswprintf not declared?
body: <p>I am trying to compile Botan on Windows with MinGW, and am receiving the following error during compilation:</p>
  
  <pre><code>c:\qt\2010.04\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/cwchar:159: error:
  '::swprintf' has not been declared
  c:\qt\2010.04\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/cwchar:166: error:
  '::vswprintf' has not been declared
  </code></pre>
  
  <p>Why are swprintf and vswprintf not declared, and how can I fix this?</p>