Here is a list of pkgs and their requirement that they also provide.
http://skvidal.fedorapeople.org/misc/provides-what-required-rawhide.txt
Now, it would be handy if rpm filtered these out automagically at build
time, and that's something to think about. If you notice if any of your
packages do something like this manually, please stop it.
here's the script I used to generate the output:
http://skvidal.fedorapeople.org/misc/provides-what-they-require.py
-sv