开发最新的Linux上游（内核，Gnome等）软件包有哪些好的Linux发行版（和方法）？

The people who really know the answer to this question are those who develop for programs or libraries which are included in Linux distributions, and which depend on other libraries which are included in Linux distributions. Them just telling me what they do in terms of the development environment I'm describing would be helpful.The people who really know the answer to this q