Merge pull request #1050 from swiftlang/jgrynspan/revert-1035

Revert "Ensure `Locked+Platform.swift` is not stripped when statically linking. (#1035)"

Author: grynspan

Sources/Testing/Support/Locked+Platform.swift

@@ -94,14 +94,3 @@ typealias DefaultLock = Never
 #warning("Platform-specific implementation missing: locking unavailable")
 typealias DefaultLock = Never
 #endif
-
-#if SWT_NO_DYNAMIC_LINKING
-/// A function which, when called by another file, ensures that the file in
-/// which ``DefaultLock`` is declared is linked.
-///
-/// When static linking is used, the linker may opt to strip some or all of the
-/// symbols (including protocol conformance metadata) declared in this file.
-/// ``LockedWith`` calls this function in ``LockedWith/init(rawValue:)`` to work
-/// around that issue.
-func linkLockImplementations() {}
-#endif

Sources/Testing/Support/Locked.swift

@@ -66,10 +66,6 @@ struct LockedWith<L, T>: RawRepresentable where L: Lockable {
   private nonisolated(unsafe) var _storage: ManagedBuffer<T, L>
 
   init(rawValue: T) {
-#if SWT_NO_DYNAMIC_LINKING
-    linkLockImplementations()
-#endif
-
     _storage = _Storage.create(minimumCapacity: 1, makingHeaderWith: { _ in rawValue })
     _storage.withUnsafeMutablePointerToElements { lock in
       L.initializeLock(at: lock)