f50d3582b4
On Apple platforms, some of the stddef.h types are also declared in system headers. In particular NULL has a conflicting declaration in <sys/_types/_null.h>. When that's in a different module from <__stddef_null.h>, redeclaration errors can occur. Make the \_\_stddef_ headers be non-modular in -fbuiltin-headers-in-system-modules and restore them back to not respecting their header guards. Still define the header guards though. __stddef_max_align_t.h was in _Builtin_stddef_max_align_t prior to the addition of _Builtin_stddef, and it needs to stay in a module because struct's can't be type merged. __stddef_wint_t.h didn't used to have a module, but leave it in it current module since it doesn't really belong to stddef.h.
30 lines
875 B
C
30 lines
875 B
C
/*===---- __stddef_null.h - Definition of NULL -----------------------------===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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*===-----------------------------------------------------------------------===
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*/
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#if !defined(NULL) || !__building_module(_Builtin_stddef)
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/* linux/stddef.h will define NULL to 0. glibc (and other) headers then define
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* __need_NULL and rely on stddef.h to redefine NULL to the correct value again.
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* Modules don't support redefining macros like that, but support that pattern
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* in the non-modules case.
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*/
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#undef NULL
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#ifdef __cplusplus
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#if !defined(__MINGW32__) && !defined(_MSC_VER)
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#define NULL __null
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#else
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#define NULL 0
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#endif
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#else
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#define NULL ((void*)0)
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#endif
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#endif
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