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gh-133256: Add _Py_NONSTRING macro (#133257)

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Fix GCC 15 compiler warnings such as:

    Modules/fcntlmodule.c:27:36: warning: initializer-string for
    array of 'char' truncates NUL terminator but destination lacks
    'nonstring' attribute (9 chars into 8 available)
    [-Wunterminated-string-initialization]
    static const char guard[GUARDSZ] = "\x00\xfa\x69\xc4\x67\xa3\x6c\x58";
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Victor Stinner 2025-05-01 17:55:49 +02:00 • committed by GitHub
parent ad2f0884b1
commit e26bafd107
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3 changed files with 17 additions and 2 deletions
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15
Include/pyport.h
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@ -685,4 +685,19 @@ extern "C" {
#endif
// _Py_NONSTRING: The nonstring variable attribute specifies that an object or
// member declaration with type array of char, signed char, or unsigned char,
// or pointer to such a type is intended to store character arrays that do not
// necessarily contain a terminating NUL.
//
// Usage:
//
// char name [8] _Py_NONSTRING;
#if _Py__has_attribute(nonstring)
# define _Py_NONSTRING __attribute__((nonstring))
#else
# define _Py_NONSTRING
#endif
#endif /* Py_PYPORT_H */