Build GMP on 64bit Windows

Question

I have followed the instruction on the \"GMP Install Instruction for Windows Platform\". I could build a 32bit version of GMP which can be used for Visual Studio.

Answer 1

How I built dynamic dll gmp-6.1.2 for windows so that the dll can be linked for a visual studio project.

Setup Environment

• Install 7-Zip
• Install Cygwin, add the following packages to the default installation
  • gcc-core
  • gcc-g++
  • libgcc
  • m4
  • make
  • cmake
  • bash
• Add the following Environment Variable to the User PATH: C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Tools\MSVC\14.15.26726\bin\Hostx64\x64
  • This is so you can use the lib command. Your lib.exe may be located elsewhere.

Build GMP

• Download the tar.bz2 version from https://gmplib.org/#DOWNLOAD and extract the gmp-6.1.2 folder with 7-zip.
• Launch bash.exe from C:\cygwin64\bin.
• Change directory to the unzipped gmp-6.1.2 folder. Ex: cd "A:\Code\gmp-6.1.2"
• Execute ./configure --disable-static --enable-shared
• Execute make
  • This will create cyggmp-10.dll under A:\Code\gmp-6.1.2\.libs\
• Execute make check
• Execute cd ./libs
• Execute lib /machine:i386 /def:cyggmp-10.dll
  • This will generate cyggmp-10.exp and cyggmp-10.lib under A:\Code\gmp-6.1.2\.libs\ for use with visual studio

You now have everything needed to call gmp from C# code.