Porting

Hello CRUX community, I'm having trouble understanding the porting guidelines. Specifically the listing of dependencies. What i don't understand is the second bullet point of this guideline. Could i have some more examples and dose it only apply for deps in core or do I apply it to all runtime deps? Even if they are in opt etc...? core' contains essential packages for a CRUX system, and our scripts and ports expect the programs provided by 'core' to be installed; this means that build dependencies provided by core are not listed in the dependency header run-time dependencies from core which aren't dynamically linked in are not to be listed, either Thanks, Mitchell