great work on XLW.
I just wanted to share a minor frustration with cross compilation (on Ubuntu 14.04)- some of the filename capitalisation is off.
The offending files are:
xlfFuncDesc.h (and a couple of others) included in XlFunctionRegistration.cpp
Also I had to manually edit the generic makefile rules, in order that '/' is not replaced by '\'.
Otherwise it was pretty smooth though, which is impressive!