Cannot debug Swift module/framework embedded in Objective-C app

Question

Alternative titles (to aid searching)

• Cannot debug Swift 2.3 framework linked to an Objective-C app in Xcode 8
• error in auto-import: f

Answer 1

I ran into this when building a framework with Carthage. Trying to debug would print the error, which referenced an Obj-C framework dependency.

I found this blog post which suggested adding a the following user-defined build setting to my project:

For Debug: REMOVE_HEADERS_FROM_EMBEDDED_BUNDLES = NO

For Release: REMOVE_HEADERS_FROM_EMBEDDED_BUNDLES = YES

This fixed the issue for me.