gh-91731: Replace Py_BUILD_ASSERT() with static_assert() (#91730)

Python 3.11 now uses C11 standard which adds static_assert()
to <assert.h>.

* In pytime.c, replace Py_BUILD_ASSERT() with preprocessor checks on
  SIZEOF_TIME_T with #error.
* On macOS, py_mach_timebase_info() now accepts timebase members with
  the same size than _PyTime_t.
* py_get_monotonic_clock() now saturates GetTickCount64() to
  _PyTime_MAX: GetTickCount64() is unsigned, whereas _PyTime_t is
  signed.

1 files changed, 5 insertions, 2 deletions

diff --git a/Objects/longobject.c b/Objects/longobject.c
index 660824f..e805dac 100644
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -771,7 +771,10 @@ _PyLong_Sign(PyObject *vv)
 static int
 bit_length_digit(digit x)
 {
-    Py_BUILD_ASSERT(PyLong_SHIFT <= sizeof(unsigned long) * 8);
+    // digit can be larger than unsigned long, but only PyLong_SHIFT bits
+    // of it will be ever used.
+    static_assert(PyLong_SHIFT <= sizeof(unsigned long) * 8,
+                  "digit is larger than unsigned long");
     return _Py_bit_length((unsigned long)x);
 }
 
@@ -5647,7 +5650,7 @@ popcount_digit(digit d)
 {
     // digit can be larger than uint32_t, but only PyLong_SHIFT bits
     // of it will be ever used.
-    Py_BUILD_ASSERT(PyLong_SHIFT <= 32);
+    static_assert(PyLong_SHIFT <= 32, "digit is larger than uint32_t");
     return _Py_popcount32((uint32_t)d);
 }