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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* Remove outdated notes about the %zd format in PyBytes_FromFormat()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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9
Objects/object.c
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@ -274,11 +274,8 @@ PyObject_Print(PyObject *op, FILE *fp, int flags)
}
else {
if (Py_REFCNT(op) <= 0) {
/* XXX(twouters) cast refcount to long until %zd is
universally available */
Py_BEGIN_ALLOW_THREADS
fprintf(fp, "<refcnt %ld at %p>",
(long)Py_REFCNT(op), (void *)op);
fprintf(fp, "<refcnt %zd at %p>", Py_REFCNT(op), (void *)op);
Py_END_ALLOW_THREADS
}
else {
@ -371,9 +368,7 @@ _PyObject_Dump(PyObject* op)
/* first, write fields which are the least likely to crash */
fprintf(stderr, "object address : %p\n", (void *)op);
/* XXX(twouters) cast refcount to long until %zd is
universally available */
fprintf(stderr, "object refcount : %ld\n", (long)Py_REFCNT(op));
fprintf(stderr, "object refcount : %zd\n", Py_REFCNT(op));
fflush(stderr);
PyTypeObject *type = Py_TYPE(op);