This weekend I gave a try at porting VirtualBox to Haiku (why not ?). It doesn't fully build yet but here is the current patch for the record, and for comments on things (not) to do. http://revolf.free.fr/beos/patches/kbuild-haiku-port-003.diff http://revolf.free.fr/beos/patches/virtualbox-haiku-port-001.diff François.