--- Libc/Libc-763.13/include/inttypes.h
+++ Libc/Libc-583/include/inttypes.h
@@ -28,8 +28,11 @@
  * and their ilk.
  */
 
-#if !defined(_INTTYPES_H_)
-#define _INTTYPES_H_
+/* "C++ implementations should define these macros only when
+ *  __STDC_FORMAT_MACROS is defined before <inttypes.h> is included."
+ */
+#if (!defined(__cplusplus) || defined(__STDC_FORMAT_MACROS)) && !defined(__STDC_FORMAT_MACROS_DEFINED)
+#define __STDC_FORMAT_MACROS_DEFINED
 
 #  undef __PRI_8_LENGTH_MODIFIER__
 #  undef __PRI_64_LENGTH_MODIFIER__
@@ -242,6 +245,11 @@
 #  define SCNuMAX       __SCN_MAX_LENGTH_MODIFIER__ "u"
 #  define SCNxMAX       __SCN_MAX_LENGTH_MODIFIER__ "x"
 
+#endif /* if C++, then __STDC_FORMAT_MACROS enables the above macros */
+
+#if !defined(_INTTYPES_H_)
+#define _INTTYPES_H_
+
 #include <sys/cdefs.h>		/* For __BEGIN_DECLS and __END_DECLS */
 #include <_types.h>		/* For __darwin_wchar_t */
 #include <stdint.h>