link: false

I was having an issue with my project where adding a new Swift package dependency led to a variety of duplicated symbol errors. My current theory is that it's because my project depends on a framework that my new dependency also depends on - causing the symbol conflict:

App -> A
|
- > B -> A

Adding link: false to my .yml file resolved this:

dependencies:
  - package: B
     link: false

I'm curious what's going on here.

Start with the dependency entry in the project's .yml specification and compare generated Xcode project output with and without link: false. Reproduce the App -> A and B -> A dependency graph in a small project, then inspect the generated links and duplicated-symbol errors; done means the linking behavior is explained and any required XcodeGen change or documentation is identified.