--- gcc/objc/objc.h	2018/04/24 18:10:16	1.1.1.2
+++ gcc/objc/objc.h	2018/04/24 18:20:11	1.1.1.4
@@ -30,26 +30,34 @@ the Free Software Foundation, 675 Mass A
 extern "C" {
 #endif
 
-#ifdef IN_GCC
-#include "gstddef.h"
-#else
-#include "stddef.h"
-#endif
+#include <stddef.h>
 
 /*
 ** Definition of the boolean type.  
 */
-typedef char  BOOL;
+typedef unsigned char  BOOL;
 #define YES   (BOOL)1
 #define NO    (BOOL)0
 
 /*
-** Definition of a selector.  Selectors are really of type unsigned int.
-** The runtime does this mapping from SEL's to names internally in the
-** sel_... operations.  You should never use the fact that it is actually
-** an integer, since other Objective-C implementations use other conventions.
+** Definition of a selector.  Selectors themselves are not unique, but
+** the sel_id is a unique identifier.
 */
-typedef void* SEL;
+typedef const struct objc_selector 
+{
+  void *sel_id;
+  const char *sel_types;
+} *SEL;
+
+inline static BOOL
+sel_eq (SEL s1, SEL s2)
+{
+  if (s1 == 0 || s2 == 0)
+    return s1 == s2;
+  else
+    return s1->sel_id == s2->sel_id;
+}
+
 
 /*
 ** ObjC uses this typedef for untyped instances.
@@ -123,61 +131,20 @@ typedef struct objc_protocol {
   struct objc_method_description_list *instance_methods, *class_methods; 
 } Protocol; 
 
-#else
-
+#else /* __OBJC__ */
 @class Protocol;
 #endif 
 
 typedef void* retval_t;		/* return value */
 typedef void(*apply_t)(void);	/* function pointer */
+typedef union {
+  char *arg_ptr;
+  char arg_regs[sizeof (char*)];
+} *arglist_t;			/* argument frame */
 
-#if defined(REG_ARGS) || defined(STACK_ARGS) 
-
-typedef struct {
-  char* arg_pointer;
-#ifdef STRUCT_RETURN
-  void* struct_return;
-#endif
-#ifdef REG_ARGS
-  void* regs[2];
-#endif
-} *arglist_t;
-
-#ifdef REG_ARGS
-#define __objc_frame_receiver(FRAME)  (FRAME)->regs[0]
-#define __objc_frame_selector(FRAME)  ((SEL)(FRAME)->regs[1])
-
-#else
-#define __objc_frame_receiver(FRAME) ((id*)(FRAME)->arg_pointer)[0]
-#define __objc_frame_selector(FRAME) ((SEL*)(FRAME)->arg_pointer)[1]
-#endif
-#else
-
-typedef void* arglist_t;
-
-#endif
-
-#if defined(__OBJC__) 
-
-#include "objc/sarray.h"
-
-static id nil_method(id rcv, SEL op, ...) { return rcv; }
-
-extern __inline__ IMP
-objc_msg_lookup(id receiver, SEL op)
-{
-  if(receiver)
-    return sarray_get(receiver->class_pointer->dtable, (size_t) op);
-  else
-    return nil_method;
-}
-
-#else
 
 IMP objc_msg_lookup(id receiver, SEL op);
 
-#endif
-
 #ifdef __cplusplus
 }
 #endif