Fix the build on iOS and add CI coverage

Author: jakepetroules

.github/workflows/pull_request.yml

@@ -24,6 +24,9 @@ jobs:
       linux_static_sdk_build_command: SWIFTBUILD_STATIC_LINK=1 LLBUILD_STATIC_LINK=1 swift build
       enable_macos_checks: true
       macos_exclude_xcode_versions: "[{\"xcode_version\": \"16.2\"}]"
+      macos_build_command:
+        swift test &&
+        /usr/bin/xcrun xcodebuild -workspace . -scheme SwiftBuild-Package -destination generic/platform=iOS
   cmake-smoke-test:
     name: cmake-smoke-test
     uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main

Sources/SWBUtil/Process.swift

@@ -26,8 +26,8 @@ extension ProcessInfo {
 #endif
 
 #if (!canImport(Foundation.NSTask) || targetEnvironment(macCatalyst)) && canImport(Darwin)
-public final class Process {
-    public enum TerminationReason: Int {
+public final class Process: @unchecked Sendable {
+    public enum TerminationReason: Int, Sendable {
         case exit = 1
         case uncaughtSignal = 2
     }