GPG on cygwin

[jdhenman]

I want to build GPG 2.0.22 for use on Cygwin.

But, GPG now requires:
  #1 Support for the GNU Portable Threads Library (Pth).
  # 		  ftp://ftp.gnu.org/gnu/pth/

and the following libraries: (current cygwin lib which do exist are too old)
   #  libgpg-error  ftp://ftp.gnupg.org/gcrypt/libgpg-error >= VERS 1.11 is required.
   #  libassuan     ftp://ftp.gnupg.org/gcrypt/libassuan    >= VERS 2.0.0 (API 2)
   #  libksba       ftp://ftp.gnupg.org/gcrypt/libksba      >= VERS 1.0.7 API 1 

Does anyone know if any of the above packages can not be built easily for Cygwin?
( I.e., by someone without Cygwin & MS Windows internal knowledge.) 

Thanks

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