If the build process fails, this may be due to a too old Java 2 version. See Where to get Java 2 for more info on getting the latest version.

Alternatively, if the error message says something about a class – or class definition – not being found, you may not have all the build libraries installed. Consult manual/lib/_readme_libs.txt and follow the instructions.

If anything else goes wrong and you can't get it right, ask for help on the firebird-docs mailing list. Please give a good description of your problem so we can help you better. If you aren't on the firebird-docs mailing list yet, visit https://lists.sourceforge.net/lists/listinfo/firebird-docs for information and subscription.