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

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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* Remove outdated notes about the %zd format in PyBytes_FromFormat()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.
This commit is contained in:
Victor Stinner 2022-05-25 14:21:36 +02:00 • committed by GitHub
parent 9485a0dbdd
commit 71d8775fee
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 11 additions and 168 deletions
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46
configure.ac
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@ -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.]),[