Add Swift Configuration

[czechboy0]

Pull Request Description

Add Swift Configuration to the compat suite.

Acceptance Criteria

To be accepted into the Swift source compatibility test suite, a project must:

• be an Xcode or swift package manager project
• support building on either Linux or macOS
• target Linux, macOS, or iOS/tvOS/watchOS device
• be contained in a publicly accessible git repository
• maintain a project branch that builds against Swift 4.0 and passes any unit tests
• have maintainers who will commit to resolve issues in a timely manner
• be compatible with the latest GM/Beta versions of Xcode and swiftpm
• add value not already included in the suite
• be licensed with one of the following permissive licenses:
  • BSD
  • MIT
  • Apache License, version 2.0
  • Eclipse Public License
  • Mozilla Public License (MPL) 1.1
  • MPL 2.0
  • CDDL
• pass ./project_precommit_check script run

Ensure project meets all listed requirements before submitting a pull request.

[justice-adams-apple]

@swift-ci test

[justice-adams-apple]

Seeing a build failure for the project it seems

swift-configuration/.build/checkouts/swift-system/Sources/System/MachPort.swift:65:43: error: reference to var 'mach_task_self_' is not concurrency-safe because it involves shared mutable state
 63 | 
 64 |         let secret = mach_port_context_t(arc4random())
 65 |         _machPrecondition(mach_port_guard(mach_task_self_, name, secret, 0))
    |                                           `- error: reference to var 'mach_task_self_' is not concurrency-safe because it involves shared mutable state
 66 |         self._context = secret
 67 |       }

[czechboy0]

That's in swift-system it appears - what would you recommend here?

[justice-adams-apple]

@swift-ci test

[justice-adams-apple]

@czechboy0 We'll likely need to fix the dependency project (swift-system), in this case since we're building with swift 6 looks like we would probably need to add
@preconcurrency to

import Darwin.Mach

https://github.com/apple/swift-system/blob/1.6.3/Sources/System/MachPort.swift#L12C1-L12C19

That or we change the swift build version of this project to 5 for the time being

[czechboy0]

@parkera would it make sense to add swift-syntax to the compat suite first?