How to Build/Update Cygwin GCC?

I'm new to Stack Overflow and Cygwin. My problem is that how do you build/update Cygwin's GCC? I see a very obsolete version of gcc from the Cygwin setup.exe. Yes, I am on windows. Windows 7 to be exact.

So, how can I build/update Cygwin's GCC? I'd rather use Cygwin than MinGW+MSYS because I like things all in one, rather than things all over the place.

Thanks. (A step by step would be appreciated as I do not know anything about building a program from source)

Also, what would I need from Cygwin to build/update Cygwin's gcc? Do I install the gcc from Cygwin first? Or do I just get the necessities from Cygwin and then build gcc using Cygwin and install gcc?

Sorry, but I do not 开发者_StackOverflow中文版excel at these types of subjects.

You can volunteer to help the maintainer, I guess. See Why is the Cygwin package of XYZ so out of date? in the Cygwin FAQ.