Can't link project with TCA due to undefined symbols related to swift-sharing dependency

[kyzmitch]

Description

Steps:

• add SPM of The Composable Arhitecture to xcode project
• add TCA to the main app build target
• add TCA to another framework in the project
• create catowseriOS/CottonViewModels/TopSitesViewModel/TopSitesReducer.swift file which uses ComposableArchitecture module
• compile

Result: Xcode output with linker errors:

Undefined symbols for architecture arm64:
Swift.Hashable in ConcurrencyExtras in Sharing.o
  "ConcurrencyExtras.AnyHashableSendable.init<A where A: Swift.Hashable, A: Swift.Sendable>(A) -> ConcurrencyExtras.AnyHashableSendable", referenced from:
one-time initialization function for fileSystem in Sharing.o
      static Sharing.FileStorage.inMemory(fileSystem: ConcurrencyExtras.LockIsolated<[Foundation.URL : Foundation.Data]>, scheduler: CombineSchedulers.AnyScheduler<(extension in Dispatch):__C.OS_dispatch_queue.SchedulerTimeType, (extension in Dispatch):__C.OS_dispatch_queue.SchedulerOptions>) -> Sharing.FileStorage in Sharing.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Project: pull request with affected branch kyzmitch/Cotton#93 where it uses TCA framework.

TCA version release: 1.17.1

Checklist

• I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

Xcode project linking step should finish without errors

Actual behavior

I see the errors above about Undefined symbols related to this swift-share lib while using TCA

Reproducing project

To reproduce you need to checkout git branch from the following PR kyzmitch/Cotton#93

Sharing version information

No response

Destination operating system

No response

Xcode version information

No response

Swift Compiler version information

swift-driver version: 1.115 Apple Swift version 6.0 (swiftlang-6.0.0.9.10 clang-1600.0.26.2)
Target: arm64-apple-macosx15.0

[mbrandonw]

Hi @kyzmitch, I am not able to build the project you linked to due to missing XCFrameworks:

Ideally you could provide a smaller, simpler project that demonstrates the problem you are having.

However, I can say that your mixture of static and dynamic libraries is most likely the problem. You probably need to create a single dynamic framework that depends on the static ComposableArchitecture library, and then depend on that dynamic framework in all of your targets (e.g. Cotton and CottonViewModels) rather than depending directly on ComposableArchitecture.

Since I don't believe this is an issue with the library I am going to convert it to a discussion. Please feel free to continue the conversation over there!

[kyzmitch]

Thank you very much, I remember similar approach with dynamic framework which I used for solving some other problem in the past, I will try that, thanks for the quick response.

[kyzmitch]

Just checked, it fixed the linker issues, thanks.