The toplevel `CMakeLists.txt` currently includes the dependency `libxmlmm` "by hand" (see [lines 26ff](https://github.com/xR3b0rn/dbcppp/blob/59ee9e862f29f14de705f9b0ac3263e63e701db4/CMakeLists.txt#L26-L49)). Consider including the dependency via its CMake integration (e.g. some call to `add_subdirectory`).