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copied!<p>The following one is a way to achieve your goal. There are other, probably better ways (e.g. based on Visual Studio), but this one has worked for me. Additionally, it does not use <code>pip</code>.</p> <p>All operations are carried out on a command prompt.</p> <ol> <li>Install <a href="http://www.mingw.org/" rel="noreferrer">Mingw</a>, including MSYS and the Development Toolkit. This will give you a fairly complete Unix-like development environment.</li> <li>Ensure that Mingw binaries are in PATH environment variable. You need <code>MinGW\bin</code> and <code>MingGW\msys\1.0\bin</code>. </li> <li>Download <a href="http://www.mpir.org/" rel="noreferrer">MPIR</a> sources in a temporary directory. It is important you do <strong>not</strong> use 2.5.1 because of a bug that will break the build. 2.5.0 is fine.</li> <li>Build the MPIR library. This is fairly straightforward: execute <code>bash configure</code> followed by <code>make</code>.</li> <li><strong>HACK #1</strong> Copy <code>libmpir.a</code> from <code>mpir-2.5.0\.libs</code> into <code>C:\Python2.7.1\libs</code>. This is necessary because <code>distutils</code> is broken and I could not find a way to direct it to the correct library location.</li> <li><strong>HACK #2</strong> Edit <code>C:\Python2.7.1\Lib\distutils\cygwincompiler.py</code> and remove any occurrance of the string <code>-mno-cygwin</code>. The reason is explained <a href="http://www.secker.nl/2012/03/08/setup-python-2-7-2-and-mingw-on-windows-xp/" rel="noreferrer">here</a>.</li> <li>Download <a href="https://www.dlitz.net/software/pycrypto/" rel="noreferrer">PyCrypto</a> sources and unpack them in another temporary directory.</li> <li>Set <code>CPPFLAGS</code> environment variable to the MPIR directory, which contains <code>mpir.h</code>.</li> <li><p><strong>HACK 3</strong> Edit <code>setup.py</code> and add the following line in <code>build_extension</code> method: </p> <blockquote> <p>self.__add_compiler_option(os.environ['CPPFLAGS'])</p> </blockquote></li> <li><p>Run <code>bash configure</code>. You should see two lines saying:</p> <blockquote> <p>checking for __gmpz_init in -lgmp... no<br> checking for __gmpz_init in -lmpir... yes</p> </blockquote></li> <li>Execute <code>python setup.py build -c mingw32</code>. You should see no errors.</li> <li>Execute <code>python setup.py test</code> to verify that everything is fine.</li> <li>Execute <code>python setup.py install</code> to copy the files into your local Python repository.</li> <li>Alternatively, run <code>python setup.py bdist_wininst</code> to create an installer.</li> </ol> <p>I really hate all the various hacks, and I'd love to hear if they can be avoided.</p>

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