I searched online didn't find anything.
David
This option is useful if your Xcode project references targets in a different Xcode project. Enabling this option allows the Xcode project file format to store the information that refers to the other Xcode project in a minimized form. For some types of projects, enabling this setting will help you reduce source control merge conflicts within the Xcode project file.
— Ed Ford, DTS Engineer
Where is this checkbox ?
Select a project in the project navigator, select a project or target and select the file inspector tab. It is in the project documentation section.
I found where it was recommended to resolve an issue, but the engineer didn't go into what it does
Sorta odd that we have this option, but no documentation on it, and no one (except Apple engineers) know what it does.
I had seen that post - it was the only link I found to the exact text of the title.
This option is useful if your Xcode project references targets in a different Xcode project. Enabling this option allows the Xcode project file format to store the information that refers to the other Xcode project in a minimized form. For some types of projects, enabling this setting will help you reduce source control merge conflicts within the Xcode project file.
— Ed Ford, DTS Engineer