Hi Jörg, thanks for your introduction and your plan to port WebKit is a very noble one. I would like to help with this, but I can not before April next year. Are you aware of the Nirvana project on Berlios? <www.berlios.de>. You will probably find the code in the lemmon branch very interesting. As for the jamfile question, it appears you have copied the Haiku build system? > calling "jam -a" terminates with the following result: > > don't know how to make <build>settype > don't know how to make <build>mimeset > don't know how to make <build>setversion These are "build tools" for which the code is actually part of the Haiku source tree. You would need to copy the source of those, or modify the Jamrules (Ingo would know which one) so that it just uses a prebuilt version. Hope this helps, -Stephan