Merge pull request #76465 from artemcm/InheritTargetSDKInfoOnExplicitSwiftDep

[Dependency Scanning] Inherit target SDK name and version for textual interface build recipes

Author: artemcm

lib/Frontend/ModuleInterfaceLoader.cpp

@@ -1670,6 +1670,19 @@ void InterfaceSubContextDelegateImpl::inheritOptionsForBuildingInterface(
     GenericArgs.push_back(triple);
   }
 
+  // Inherit the target SDK name and version
+  if (!LangOpts.SDKName.empty()) {
+    genericSubInvocation.getLangOptions().SDKName = LangOpts.SDKName;
+    GenericArgs.push_back("-target-sdk-name");
+    GenericArgs.push_back(ArgSaver.save(LangOpts.SDKName));
+  }
+  if (LangOpts.SDKVersion.has_value()) {
+    genericSubInvocation.getLangOptions().SDKVersion = LangOpts.SDKVersion;
+    GenericArgs.push_back("-target-sdk-version");
+    GenericArgs.push_back(ArgSaver.save(LangOpts.SDKVersion.value()
+                                                .getAsString()));
+  }
+
   // Inherit the Swift language version
   genericSubInvocation.getLangOptions().EffectiveLanguageVersion =
     LangOpts.EffectiveLanguageVersion;

test/ScanDependencies/include-target-sdk-in-interface-recipe.swift

@@ -0,0 +1,12 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-swift-frontend -scan-dependencies -module-load-mode prefer-interface %s -o %t/deps.json -target-sdk-version 15.0 -target-sdk-name macosx15.0.test_name
+
+// Check the contents of the JSON output
+// RUN: %validate-json %t/deps.json | %FileCheck %s
+
+func foo() { print(1) }
+
+// CHECK: "-target-sdk-name",
+// CHECK-NEXT: "macosx15.0.test_name"
+// CHECK: "-target-sdk-version",
+// CHECK-NEXT: "15.0"