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[3.12] gh-105059: Use GCC/clang extension for PyObject union (GH-107232) #107236

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Merged
merged 1 commit into from
Jul 25, 2023
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[3.12] gh-105059: Use GCC/clang extension for PyObject union (GH-107232) #107236

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5 changes: 5 additions & 0 deletions Include/object.h
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Original file line number Diff line number Diff line change
Expand Up @@ -165,6 +165,11 @@ check by comparing the reference count field to the immortality reference count.
*/
struct _object {
_PyObject_HEAD_EXTRA
#if (defined(__GNUC__) || defined(__clang__)) \
&& !(defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L)
// On C99 and older, anonymous union is a GCC and clang extension
__extension__
#endif
union {
Py_ssize_t ob_refcnt;
#if SIZEOF_VOID_P > 4
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