This was one patch Rylie made on top of a third-party upstream project that appears to be unmaintained as well. I have moved on, no longer use this, and have no capacity to meaningfully maintain it.
Unmaintained
txmpp is a C++ XMPP library created from the non-XEP-0166 portions of libjingle with various bits removed and tweaked.
The motivating factor for "creating" txmpp was the lack of permissively licenced alternatives.
If you don't mind a library with a copyleft license you might also try gloox.
scons --with-examples
See the src/examples directory.
This work is licensed under the New BSD License (see the LICENSE file).