Open Radar

 
Summary:
When developing a Swift framework, when importing the -Swift.h bridging header file in the framework umbrella header file:

• If I change from building for a simulator to device or vice versa, the umbrella header file will throw an error that the -Swift.h bridging header file is not found.

• If I clean the build folder, the -Swift.h bridging header file is never found. 

After cleaning the build folder, I must remove the -Swift.h bridging header file import in the framework umbrella header file, then build and add the import back for Xcode to resume building with the -Swift.h bridging header import file.

Steps to Reproduce:
1. Create a new framework project and choose Swift as the language
2. In the umbrella header file of the new project, add an import for the -Swift.h bridging header file
3. Hit build. Xcode builds successfully.
4. Change the active scheme to target a simulator (if it was targeting a device), or a device (if it was targeting a simulator).
5. Hit build. Xcode build will fail. The error will be *-Swift.h file not found.
6. Change the active scheme back to how it was in step 3.
7. Hit build and Xcode builds successfully.
8. Now clean the build folder (Product > press alt > Clean Build Folder).
9. Try to build the project for both a simulator and a device. Xcode will never build successfully. 
10. In the framework umbrella header file, comment out or remove the import of the -Swift.h bridging header file.
11. Hit Build. Xcode builds successfully.
12. Undo step 11 (add back the import)
13. Build. Xcode builds successfully.
14. Redo step 4....

Expected Results:
The -Swift.h bridging header file is generated automatically and dynamically by Xcode. I expect this file to be built optimally and always be available when I build my project.

Actual Results:
Xcode doesn't seem to generate the -Swift.h bridging header file for different architectures even when changing from simulator target to device. Additionally if the build folder is cleaned or removed, Xcode doesn't seem to realise that the -Swift.h bridging header file needs to be regenerated until the next time the project is built successfully (which means that in a normal use case it won't ever build successfully because the umbrella header file is importing the -Swift.h bridging header file).

Version:
Xcode 6.1 (6A1052d)