gh-93202: Always use %zd printf formatter (#93201)

Python now always use the ``%zu`` and ``%zd`` printf formats to
format a size_t or Py_ssize_t number. Building Python 3.12 requires a
C11 compiler, so these printf formats are now always supported.

* PyObject_Print() and _PyObject_Dump() now use the printf %zd format
  to display an object reference count.
* Update PY_FORMAT_SIZE_T comment.
* Remove outdated notes about the %zd format in PyBytes_FromFormat()
  and PyUnicode_FromFormat() documentations.
* configure no longer checks for the %zd format and no longer defines
  PY_FORMAT_SIZE_T macro in pyconfig.h.
* pymacconfig.h no longer undefines PY_FORMAT_SIZE_T: macOS 10.4 is
  no longer supported. Python 3.12 now requires macOS 10.6 (Snow
  Leopard) or newer.

1 files changed, 0 insertions, 46 deletions

diff --git a/configure.ac b/configure.ac
index bef4904..a8d499d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6004,52 +6004,6 @@ then
 	LIBS="$LIBS -framework CoreFoundation"
 fi
 
-AC_CACHE_CHECK([for %zd printf() format support], ac_cv_have_size_t_format, [dnl
-AC_RUN_IFELSE([AC_LANG_SOURCE([[
-#include <stdio.h>
-#include <stddef.h>
-#include <string.h>
-
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-
-#ifdef HAVE_SSIZE_T
-typedef ssize_t Py_ssize_t;
-#elif SIZEOF_VOID_P == SIZEOF_LONG
-typedef long Py_ssize_t;
-#else
-typedef int Py_ssize_t;
-#endif
-
-int main()
-{
-    char buffer[256];
-
-    if(sprintf(buffer, "%zd", (size_t)123) < 0)
-       	return 1;
-
-    if (strcmp(buffer, "123"))
-	return 1;
-
-    if (sprintf(buffer, "%zd", (Py_ssize_t)-123) < 0)
-       	return 1;
-
-    if (strcmp(buffer, "-123"))
-	return 1;
-
-    return 0;
-}
-]])],
-  [ac_cv_have_size_t_format=yes],
-  [ac_cv_have_size_t_format=no],
-  [ac_cv_have_size_t_format="cross -- assuming yes"
-])])
-if test "$ac_cv_have_size_t_format" != no ; then
-  AC_DEFINE(PY_FORMAT_SIZE_T, "z",
-  [Define to printf format modifier for Py_ssize_t])
-fi
-
 AC_CHECK_TYPE(socklen_t,,
   AC_DEFINE(socklen_t,int,
             [Define to `int' if <sys/socket.h> does not define.]),[