PyCrypto builds neither with MSVC nor MinGW

Case Van Horsen casevh at
Wed Feb 8 13:31:34 CET 2012

On Wed, Feb 8, 2012 at 4:24 AM, Alec Taylor <alec.taylor6 at> wrote:
> Thanks, but to get it to work with pip, wouldn't I need to add it to
> PATH? - Or can I just add those library args to pip?
I don't think so. pyCrypto probably builds a single DLL so the MPIR library is
statically linked into that DLL. Only the innvocation of should need
to refer to the MPIR library locations.  I don't use pip so I'm not sure how to
get pip to install the resulting DLL, etc.
> On Wed, Feb 8, 2012 at 9:48 PM, Case Van Horsen <casevh at> wrote:
>> On Tue, Feb 7, 2012 at 9:37 PM, Alec Taylor <alec.taylor6 at> wrote:
>>> Thanks all for your replies.
>>> I have now installed MSVC8 and YASM.
>> I assume you installed Visual Studio. I've omitted the commands to use
>> the SDK compiler below.
>>> I was able to successfully run configure.bat and make.bat (including
>>> make.bat check).
>>> However, I'm unsure what to do about install, since there is no
>>> install arg. Do I copy it across to my VC\bin folder, or does it need
>>> it's own place in PATH + system variables?
>> The following is just a guess.
>> I copy the files to a convenient location and then specify that
>> location to Below is an excerpt from my build process.
>> mkdir c:\src\lib
>> mkdir c:\src\include
>> xcopy /Y mpir.h c:\src\include\*.*
>> xcopy /Y win\mpir.lib c:\src\lib\*.*
>> python build_ext -Ic:\src\include -Lc:\src\lib install
>>> I am asking because I don't know where it is looking for the MPIR library.
>>> Thanks for all suggestions,
>>> Alec Taylor

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