source: branches/ffigen-apple-gcc-5646/ffigen4/source/gcc-5646-objc-act.diff@ 73

--- objc/objc-act.c.orig        2009-09-15 07:41:17.000000000 -0600
+++ objc/objc-act.c     2009-09-15 07:44:55.000000000 -0600
@@ -972,7 +972,10 @@
      do not output any debug info. for class type as yet. */
   gcc_assert (TREE_CODE (objc_interface_context) == CLASS_INTERFACE_TYPE);
   save_default_debug_hooks = debug_hooks;
-  debug_hooks = &do_nothing_debug_hooks;
+  if (!flag_syntax_only) 
+    debug_hooks = &do_nothing_debug_hooks;
+
+
   /* APPLE LOCAL end radar 4666559 */
   objc_ivar_chain
     = continue_class (objc_interface_context);
@@ -16938,6 +16941,20 @@
           }
         /* APPLE LOCAL end radar 4965989 */
     }
+  if (flag_syntax_only) {
+    switch (TREE_CODE (class)) {
+    case CLASS_INTERFACE_TYPE:
+      ffi_rest_of_objc_class_compilation (class);
+      break;
+    case CATEGORY_INTERFACE_TYPE:
+      ffi_rest_of_objc_category_compilation (class);
+      break;
+    case PROTOCOL_INTERFACE_TYPE:
+      ffi_rest_of_objc_protocol_compilation (class);
+      break;
+    }
+  }
+
   /* APPLE LOCAL end objc new property */
 }