Get rid of __STDC_FORMAT_MACROS, __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS

This went into glibc 2.18, and posttypes.h from gcc >= 12.0 no longer defines them.

See https://sourceware.org/bugzilla/show_bug.cgi?id=15366

Author: th-otto

include/inttypes.h

@@ -29,10 +29,6 @@
 #include <stdint.h>
 
 
-/* The ISO C 9X standard specifies that these macros must only be
-   defined if explicitly requested.  */
-#if !defined __cplusplus || defined __STDC_FORMAT_MACROS
-
 /* Macros for printing format specifiers.  */
 
 /* Decimal notation.  */
@@ -479,8 +475,6 @@
 # define SCNxPTR	"x"
 #endif
 
-#endif	/* C++ && format macros */
-
 
 __BEGIN_DECLS
 

include/stdint.h

@@ -156,10 +156,6 @@ typedef unsigned long int uintmax_t;
 #endif
 
 
-/* The ISO C 9X standard specifies that in C++ implementations these
-   macros should only be defined if explicitly requested.  */
-#if !defined __cplusplus || defined __STDC_LIMIT_MACROS
-
 /* Limits of integral types.  */
 
 /* Minimum of signed integral types.  */
@@ -337,12 +333,6 @@ typedef unsigned long int uintmax_t;
 # define WINT_MIN               (__WINT_MIN__)
 # define WINT_MAX               (__WINT_MAX__)
 
-#endif  /* C++ && limit macros */
-
-
-/* The ISO C 9X standard specifies that in C++ implementations these
-   should only be defined if explicitly requested.  */
-#if !defined __cplusplus || defined __STDC_CONSTANT_MACROS
 
 /* Signed.  */
 # define INT8_C(c)      c
@@ -377,6 +367,4 @@ typedef unsigned long int uintmax_t;
 # define UINTMAC_C(c) c ## UL
 #endif
 
-#endif  /* C++ && constant macros */
-
 #endif /* stdint.h */