To build gmp
download gmp source http://gmplib.org/#DOWNLOAD
- unzip it
download port by Brian Gladman http://fp.gladman.plus.com/computing/gmp4win.htm
- place the port inside the unziped gmp source folder, replacing all the files with the same name, thus merging the folders
- open build.vc9
- open gmp.sln, ignore the warnings and errors
- hit f5
- there should be a gmp.dll in .../build.vc9/dll/Win32/Debug/ and a gmp.lib in .../build.vc9/lib/Win32/Debug/
Issues: No know issues exists.