I am uploading to: http://home.apache.org/~jim/AOO-builds/ <http://home.apache.org/~jim/AOO-builds/>
4.2.0-dev builds for Linux64 and Windows... After that will come Linux32 and macOS (assuming it builds... I've had issues before). These are based on HEAD of trunk, ~r1816311. The Linux builds are built on CentOS 6.9.