First, you need to check Qt contribution model

Additional to that we have a few other simple contribution rules:

• the contribution should use ONLY original clone (even if Linus in person comes and says something else don't do it !), we don't have necessary man power to check hundreds of commits. If the clone needs to be synchronized with upstream Qt, please open an issues and we'll do it, for you !
• the contribution should be complete work!
• the contribution should NEVER break existing frozen ABI/API !
• the contribution should follow Qt and [Necessitas licensing policy]