title: Can't install pycrypto on windows virtualenv
body: <p>I am trying to install pycrypto on my Windows machine. I have mingw installed and distutils is using it. The error here is what I am getting:</p>
  
  <pre><code>In file included from C:\Python27\include/pyconfig.h:68:0,
  
  from C:\Python27\include/Python.h:8,
  
  from src/winrand.c:33:
  
  c:\mingw\bin../lib/gcc/mingw32/4.7.2/../../../../include/io.h:301:1: error: unknown type name 'off64_t'
  
  c:\mingw\bin../lib/gcc/mingw32/4.7.2/../../../../include/io.h:301:36: error: unknown type name 'off64_t'
  
  c:\mingw\bin../lib/gcc/mingw32/4.7.2/../../../../include/io.h:302:1: error: unknown type name 'off64_t'
  
  c:\mingw\bin../lib/gcc/mingw32/4.7.2/../../../../include/io.h:302:39: error: unknown type name 'off64_t'
  
  src/winrand.c:38:0: warning: "_WIN32_WINNT" redefined [enabled by default]
  
  In file included from c:\mingw\bin../lib/gcc/mingw32/4.7.2/../../../../include/_mingw.h:35:0,
  
  from c:\mingw\bin../lib/gcc/mingw32/4.7.2/../../../../include/io.h:27,
  
  from C:\Python27\include/pyconfig.h:68,
  
  from C:\Python27\include/Python.h:8,
  
  from src/winrand.c:33:
  
  c:\mingw\bin../lib/gcc/mingw32/4.7.2/../../../../include/sdkddkver.h:154:0: note: this is the location of the previous definition
  
  error: command 'gcc' failed with exit status 1
  </code></pre>
  
  <p>Edit: I found this, but I am not sure how to fix pip install with it.
  <a href="http://ac-archive.sourceforge.net/largefile/largefiles_win32.print.html" rel="nofollow">http://ac-archive.sourceforge.net/largefile/largefiles_win32.print.html</a></p>