I created openembedded-essential package for Debian derived distributions which depend on all packages required by OpenEmbedded. It took me about 5 minutes to get first version working and 15 to get it polished. Resulting package depends on needed stuff and contain only own changelog.
Then I tried to create RPM version for all those Red Hat/Fedora/Mandriva derived distros… RPM HowTo is from 1999 year and RPM 4.4.1 refuse to work with spec from this HowTo. So I started to dig for other manuals — found one from 2002, then some others. But still no idea how to build RPM package which DOES NOT have sources and/or patches — just pure dependencies and own changelog.
How does RPM based maintainers do their job? Thats probably a good question…