Welcome to the libart source tree! This code is being developed in a "free software for sale" model. Thus, it's available under a free software license (LGPL for this module), but I'm also requesting that for all changes to the code the copyright gets assigned back to me. So if you want to contribute, please do, but contact me about getting the copyright assigned. Otherwise, I will have to back your changes out. Thanks! Raph Levien