[DNM] Diagnostic prints for CI debugging

Author: artemcm

Sources/SwiftDriver/Toolchains/DarwinToolchain.swift

@@ -406,6 +406,7 @@ public final class DarwinToolchain: Toolchain {
     // If not specified otherwise, we should use the same triple as -target
     if !driver.parsedOptions.hasArgument(.disableClangTarget) &&
         driver.isFrontendArgSupported(.clangTarget) {
+      print("Frontend Supports '-clang-target'")
       // The common target triple for all Clang dependencies of this compilation,
       // both direct and transitive is computed as:
       // 1. An explicitly-specified `-clang-target` argument to this driver invocation
@@ -423,6 +424,9 @@ public final class DarwinToolchain: Toolchain {
 
       commandLine.appendFlag(.clangTarget)
       commandLine.appendFlag(clangTargetTriple)
+      print("Adding '-clang-target \(clangTargetTriple)'")
+    } else {
+      print("Frontend Does not support '-clang-target'")
     }
   }
 }

Tests/SwiftDriverTests/SwiftDriverTests.swift

@@ -3634,6 +3634,7 @@ final class SwiftDriverTests: XCTestCase {
     XCTAssertEqual(plannedJobs.count, 2)
     XCTAssertTrue(plannedJobs[0].commandLine.contains(.flag("-target")))
     XCTAssertTrue(plannedJobs[0].commandLine.contains(.flag("-clang-target")))
+    print(plannedJobs[0].commandLine.joinedUnresolvedArguments)
 #endif
   }