As the old build service is down and cannot be restored, I set up a new Wiki page:
Discussion follows here.
I myself search for mingw build service and Mac-OS-X. FYI mingw is the windows counterpart of gcc. Ubuntu has a cross-compiler for mingw so Windows builds can be created on Ubuntu as well. Mac-OS-X is based on BSD, maybe there also is a possibility to cross-build a Mac binary. Any hints are very much welcome. Thanks in advance and Regards,