I have tagged and set a "release" of the updates applied.  

Win32 static binaries are available at the link below.  
There is also a download available of the GUI that tries to link to existing .dlls in on for Windows systems.  

Build Environment Used:
Linux jessie 3.16.0-4-586 #1 Debian 3.16.7-ckt7-1 (2015-03-01) i686 GNU/Linux
i686-w64-mingw32-gcc v4.9.1 (GCC)
OpenSSL v1.0.1m
Boost v1.53
QT v4.8.6
BerkeleyDB v4.8.30.NC
miniupnpc v1.9.20150206
libpng v1.6.16
libqrencode v2014.09.23
zlib-1.2.8

BACKUP YOUR WALLET.  I AM NOT RESPONSIBLE FOR WALLET ISSUES.  

I've tested this with blockchain download and transferring coins back and forth between the old v0.6.3.3 client, and the v0.8.7.3 build that's running on my seed node.  I have not performed any mining tests through this build.  

BACKUP BEFORE UPGRADING.  I CANNOT STRESS THIS ENOUGH... YOU NEVER KNOW WHAT MAY HAPPEN...

https://github.com/thecarnie/XencoinCommunity/releases/tag/v0.6.3.4

Additional Notes:
No Mac/OSX tests have been performed (a volunteer will have to verify the build process and produce clients - I will add them to the repo when available)
No building on Windows via Mingw-w64 have been tested.  This is a cross-compile build from a Linux box. 

There may need to be adjustments to the makefiles for platform builds.

If you have fixes, please submit a pull request.  I don't have millions of hours to support builds - nor financial resources to keep the seed node going indefinitely - but I will contribute whatever I can for as long as I can.