You need to write an SDK that is closed source, but you'd like to use dependencies. Due to the limitations of the process runtime, you can only have one version of a dependency in an app. If your closed-source SDK happens to include the same dependencies as another then your SDK consumers are not going to have a good time.
CocoaPods Packager is apod command that takes a Podspec and generates the resulting framework or static library foryou. It has techniques for embedding its dependencies safely and uses a Podspec as the source of truth for all your settings.
To find out more, check outcocoapods/cocoapods-packager.