Spurious clang warning about non-portable path with case-sensitive symlink
| Originator: | steven | ||
| Number: | rdar://38963247 | Date Originated: | 28 March 2018 |
| Status: | Open | Resolved: | |
| Product: | Developer Tools | Product Version: | |
| Classification: | Other Bug | Reproducible: | Always |
### Summary: When importing symlinked header files, clang sometimes seems to compare the imported path to the symlink target, rather than to the path of the symlink itself. It may then issue a spurious warning about a mismatch between the cases of the two paths, like this one: `Non-portable path to file '<protobuf/Any.pbobjc.h>'; specified path differs in case from file name on disk` There is additional discussion in https://github.com/google/protobuf/issues/3218. We have not been able to reproduce the issue with a simpler project than the attached, and suspect there is something in addition to the case mismatch necessary to trigger the warning. ### Steps to Reproduce: 1. Download and unzip the attached TestApp project 2. Run `pod install` from the unzipped directory and open TestApp.xcworkspace 3. Build the app for the iPhone X simulator ### Expected Results: The app builds without any warnings. ### Actual Results: The app builds with thirteen warnings similar to the one described above. ### Version/Build: macOS 10.13.3 (17D102) Xcode 9.2 (9C40b) CocoaPods 1.4.0 ### Attachments: https://github.com/google/protobuf/files/1854645/TestApp.Swift.with.Firestore.zip
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