Hi, The external Firebird 3.0 now builds on Windows. https://gerrit.libreoffice.org/27642/ Although I got an error when compiling the firebird driver: error C1083: Cannot open include file: 'ibase.h': No such file or directory. After I make it work, I'm going to continue with Mac OS. Probably it is the easier one. Regards, Tamás Bunth