Xcode 8: Swift 2.3: Duplicate symbols when using SWIFT_VERSION=2.3
| Originator: | apsharp | ||
| Number: | rdar://26782485 | Date Originated: | 2016-06-13 |
| Status: | Open | Resolved: | |
| Product: | Xcode-beta | Product Version: | Xcode-beta (8S128d) |
| Classification: | Other Bug | Reproducible: | Always |
Summary: When compiling with Swift 2.3 in Xcode 8, two versions of libarclite are linked, causing duplicate symbol errors when linking. Steps to Reproduce: 1. Clone https://github.com/Quick/Nimble.git @ d8900634c5ae69bf0cdf24b97096fa599d9890d7 2. Enable the "Use Legacy Swift Language Version" build setting 3. Compile. Expected Results: Expected the project to successfully build. Actual Results: The framework seems to be linked with two versions of Objective-C runtime, in both XcodeDefault.xctoolchain and Swift_2.3.xctoolchain. This results in duplicate symbol errors. Version: Xcode-beta (8S128d) Notes: A workaround is to disable implicit linking of the Objective-C runtime and turn of ARC at the project level, then apply the -fobjc-arc compiler flag to any applicable Objective-C files: https://github.com/Quick/Nimble/pull/302
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