Undefined symbols for architecture arm64

[mihaicris-adoreme]

Description

I am getting an error in Xcode, when running tests, if I use swift-dependencies (which uses swift-concurrency-extras) at the linkage step

I am using OTHER_LDFLAGS -ld_classic

Do you support the classic linker?

Checklist

• 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

Link project to succeed.

Actual behavior

Undefined symbols for architecture arm64:
  "_$s17ConcurrencyExtras22withMainSerialExecutor9operationyyyKXE_tKF", referenced from:
      _$s16AdoreMeUnitTests019CheckoutAddressListD0C10invokeTestyyF in CheckoutAddressListTests.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Steps to reproduce

final class CheckoutAddressListTests: XCTestCase {
    override func invokeTest() {
        withMainSerialExecutor {
            super.invokeTest()
        }
    }

swift-concurrency-extras version information

1.1.0

Destination operating system

iOS 17.4

Xcode version information

15.3

Swift Compiler version information

swift-driver version: 1.90.11.1 Apple Swift version 5.10 (swiftlang-5.10.0.13 clang-1500.3.9.4)
Target: arm64-apple-macosx14.0

[stephencelis]

@mihaicris-adoreme Sorry, we must have missed this when it came in.

I don't think we do anything out of the ordinary here, except maybe withMainSerialExecutor relies on a Swift hook that is causing issues? That might make this a more general Swift bug with your linker settings and the hook we're using.

If you have a PR that addresses the issue we'd be open to merging it, or if you can at attach a project that reproduces the problem we'd take a look to see if we can figure out what's going on.

That said, I don't think we consider this a bug with the library given the less than traditional build settings, so I'm going to covert to a discussion for now.

[mihaicris-adoreme]

Issue no more reproduced.