1/*===---- __stddef_null.h - Definition of NULL -----------------------------===
 2 *
 3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 4 * See https://llvm.org/LICENSE.txt for license information.
 5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 6 *
 7 *===-----------------------------------------------------------------------===
 8 */
 9
10#if !defined(NULL) || !__building_module(_Builtin_stddef)
11
12/* linux/stddef.h will define NULL to 0. glibc (and other) headers then define
13 * __need_NULL and rely on stddef.h to redefine NULL to the correct value again.
14 * Modules don't support redefining macros like that, but support that pattern
15 * in the non-modules case.
16 */
17#undef NULL
18
19#ifdef __cplusplus
20#if !defined(__MINGW32__) && !defined(_MSC_VER)
21#define NULL __null
22#else
23#define NULL 0
24#endif
25#else
26#define NULL ((void*)0)
27#endif
28
29#endif