A small tip outside my expertise, enjoy.
For building GMP (GNU Multiple Precision Arithmetic Library, http://gmplib.org) under Windows you can follow theses easy step;
– Get latest GMP [1].
– Create a folder to store your GMP’s library (example C:\gmp)
– Get [MinGW][2].
– Do a full install of MinGW. (+-400m)
– Run msys.bat from C:\MinGW\msys\1.0 if you installed in the default directory.
– Run ./configure --prefix=/c/GMP --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 -disable-static --enable-shared. Please note there I didn’t used --enable-cxx as the c++ module does not seem to compile well with the new GMP’s library. (It reference inttypes.h that mingw can’t find)
– Run make
– Run make install
-Run dumpbin /exports libgmp-10.dll >libgmp-10.exports
-Edit the file libgmp-10.exports to leave there only the function name.
-Run lib /def:libgmp-10.def /out:libgmp-10.lib
and voila, you are done.
You will have a .h and a .lib library that you can link to Visual Studio like a .lib.
[1]: http://gmplib.org
[2]: http://sourceforge.net/projects/ming
Phil’s Blog | IT to the core ! 
There is no msys folder in MinGw download you provided.
LikeLike
I am a novice in this field, therefore I`m completely lost. it would be nice if you create a video tutorial about how to install the gmp library in windows 64 bits.
LikeLike