Fix definition of INTPTR_{MIN,MAX} in stdint.h

newlib/libc/include/stdint.h

 /*
  * Copyright (c) 2004, 2005 by
  * Ralf Corsepius, Ulm/Germany. All rights reserved.
  *
  * Permission to use, copy, modify, and distribute this software
  * is freely granted, provided that this notice is preserved.
  */
 
 #ifndef _STDINT_H
 #define _STDINT_H
@@ skipping 172 matching lines @@
   typedef __UINTMAX_TYPE__ uintmax_t;
 #elif __have_longlong64
   typedef unsigned long long uintmax_t;
 #else
   typedef unsigned long uintmax_t;
 #endif
 
 typedef __intptr_t intptr_t;
 typedef __uintptr_t uintptr_t;
 
-#ifdef __INTPTR_TYPE__
+#if defined(__INTPTR_TYPE__) && defined(__INTPTR_MAX__) && defined(__UINTPTR_MAX__)
 #define INTPTR_MIN (-__INTPTR_MAX__ - 1)
 #define INTPTR_MAX __INTPTR_MAX__
 #define UINTPTR_MAX __UINTPTR_MAX__
 #elif defined(__PTRDIFF_TYPE__)
 #define INTPTR_MAX PTRDIFF_MAX
 #define INTPTR_MIN PTRDIFF_MIN
 #ifdef __UINTPTR_MAX__
 #define UINTPTR_MAX __UINTPTR_MAX__
 #else
 #define UINTPTR_MAX (2UL * PTRDIFF_MAX + 1)
@@ skipping 323 matching lines @@
 #define UINTMAX_C(x)    x##ULL
 #endif
 #endif
 
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* _STDINT_H */