Rxswift: [Xcode 11.3.1] "Could not find module 'RxSwift' for target 'arm64-apple-ios';"

[takuoka]

My iOS App Project was no ploblem with RxSwift for 2~3 month untill today's morning,
but My Project have broken since I excuted carthage update once...

I spent half of day, but It haven't solved.

Process & Error

carthage update RxSwift --platform iOS

↓

:warning: "Incompatible Swift version - framework was built with 5.0.1 (swiftlang-1001.0.82.4 clang-1001.0.46.5) and the local version is 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15)."

Falling back to building from the source

↓

✔ Carthage Build is finished.

↓

Build Error on Xcode Project.

❌ Could not find module 'RxSwift' for target 'arm64-apple-ios'; found: i386, i386-apple-watchos-simulator, arm64_32-apple-watchos, armv7k, armv7k-apple-watchos, arm, arm64_32

---

Expected outcome:

No Problem of Xcode Build.

What actually happens:

:warning: "Incompatible Swift version - framework was built with 5.0.1 (swiftlang-1001.0.82.4 clang-1001.0.46.5) and the local version is 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15)."

❌ Could not find module 'RxSwift' for target 'arm64-apple-ios'; found: i386, i386-apple-watchos-simulator, arm64_32-apple-watchos, armv7k, armv7k-apple-watchos, arm, arm64_32

Information

RxSwift/RxCocoa/RxBlocking/RxTest version/commit

5.0.1

Platform/Environment

• [x] iOS
• [ ] macOS
• [ ] tvOS
• [ ] watchOS
• [ ] playgrounds

Xcode version:

Version 11.3.1 (11C504)

I have multiple versions of Xcode installed:
(so we can know if this is a potential cause of your issue)

• [ ] yes (which ones)
• [x] no

Level of RxSwift knowledge:
(this is so we can understand your level of knowledge
and formulate the response in an appropriate manner)

• [ ] just starting
• [ ] I have a small code base
• [x] I have a significant code base

[takuoka]

And I confirmed 'arm64-apple-ios' module of RxSwift.

[freak4pc]

Hey - I don't know enough about Carthage and this doesn't seem to happen to me. Can you attach a project reproducing the issue?

If you have a PR to solve this, I'd be happy to accept as well.

[takuoka]

This is sample project to reproduce the issue.
https://github.com/entotsu/Sample

[freak4pc]

Your project has a bunch of non-compiling dependency and Realm code, so I can't do much with it. Here's a test I made with Carthage based on the instructions in the Carthage project, including a test target, and everything seems fine:

RxCarthage.zip

Please test and let me know.

[takuoka]

@freak4pc Thank you.
I made a simple project of RxSwift with Carthage, and It's no problem too. 👌

[takuoka]

I found the reason of this problem.
I don't know why but Framework Search Path had WatchOS's path.
I removed it, and build error was solved! 👌