This is XQilla, a C++ implementation of XQuery and XPath 2.0 based on Xerces-C.

Build Instructions
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1. Download a source distribution of Xerces-C 3.1.1
2. Build Xerces-C

cd xerces-c-3.1.1/
./configure
make

4. Build XQilla

cd xqilla/
./configure --with-xerces=`pwd`/../xerces-c-3.1.1/
make