Xcode: How to add the built product from one project to another in the same workspace?

Question

Say I have 2 projects in an Xcode 4 workspace. Project A is the final product which requires the utility app built from project B. The goal is to have the build process of A automatically build project B if necessary, then copy the built app into the resource folder of product A's app bundle.

Xcode 4's documentation is really lacking in this regard. I tried adding the built B.app into project A with Add Files to "project A"... command. It does copy the app bundle but it doesn't check for a dependency. That is, it does not automatically build project B when it's updated.

Any pointer to find the right documentation is also much appreciated.

Edited: I am looking to accomplish the first 2 benefits mentioned in this doc, that are:

• One project can use the products of another project while building.

• If one project depends on the products of another in the same workspace, Xcode can detect this and automatically build the projects in the correct sequence.

I know the plain old project way of adding a project to another one as a sub-project so I can set the target dependencies. But from the wording of the workspace doc, there's seems to be an easier and automatic way. But I am not able to find the steps to do either of the two features.

Answer 1

Add project B as "Target dependency" in project A's "Build phases" tab in the target screen. (The screen that you get when you click on the top level project node)

Update:
It seems that a project can only define the output of another project as dependency if the second project is a subproject of the first:

If your Workspace has the following structure, defining dependencies is not possible: