in reply to Re^2: Installing Math::Pari module on Windows 2008
in thread Installing Math::Pari module on Windows 2008

MinGw is already installed on host ... Any idea how to overcome this?

Your version of MinGW/gcc is very old, and since the problem is with mingw64 headers, first thing I would try is install a newer MinGW/gcc -- whatever the mingw64 equivalent is of

mingw-get upgrade gcc-core-bin