Merge pull request #61919 from artemcm/InheritExtraClangStateForInterfaceSubInvocation

Inherit parent's extra Clang arguments when creating an interface build sub-invocation.

include/swift/Frontend/FrontendOptions.h

@@ -345,6 +345,11 @@ public:
   /// are errors. The resulting serialized AST may include errors types and
   /// skip nodes entirely, depending on the errors involved.
   bool AllowModuleWithCompilerErrors = false;
+  
+  /// Whether or not the compiler must be strict in ensuring that implicit downstream
+  /// module dependency build tasks must inherit the parent compiler invocation's context,
+  /// such as `-Xcc` flags, etc.
+  bool StrictImplicitModuleContext = false;
 
   /// Downgrade all errors emitted in the module interface verification phase
   /// to warnings.

include/swift/Frontend/ModuleInterfaceLoader.h

@@ -300,6 +300,7 @@ struct ModuleInterfaceLoaderOptions {
   bool disableImplicitSwiftModule = false;
   bool disableBuildingInterface = false;
   bool downgradeInterfaceVerificationError = false;
+  bool strictImplicitModuleContext = false;
   std::string mainExecutablePath;
   ModuleInterfaceLoaderOptions(const FrontendOptions &Opts):
     remarkOnRebuildFromInterface(Opts.RemarkOnRebuildFromModuleInterface),
@@ -307,6 +308,7 @@ struct ModuleInterfaceLoaderOptions {
     disableImplicitSwiftModule(Opts.DisableImplicitModules),
     disableBuildingInterface(Opts.DisableBuildingInterface),
     downgradeInterfaceVerificationError(Opts.DowngradeInterfaceVerificationError),
+    strictImplicitModuleContext(Opts.StrictImplicitModuleContext),
     mainExecutablePath(Opts.MainExecutablePath)
   {
     switch (Opts.RequestedAction) {
@@ -479,7 +481,8 @@ private:
   }
   void
   inheritOptionsForBuildingInterface(const SearchPathOptions &SearchPathOpts,
-                                     const LangOptions &LangOpts, bool suppressRemarks,
+                                     const LangOptions &LangOpts,
+                                     bool suppressRemarks,
                                      RequireOSSAModules_t requireOSSAModules);
   bool extractSwiftInterfaceVersionAndArgs(CompilerInvocation &subInvocation,
                                            SmallVectorImpl<const char *> &SubArgs,