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libc++'s stddef.h includes an existing definition of max_align_t for C++11, but it is only defined for C++, not for C. In addition, GCC and clang both define an alternate version of max_align_t that uses a union of multiple types rather than a plain long double as in libc++. This adds a __max_align_t to <sys/_types.h> that matches the GCC and clang definition that is mapped to max_align_t in <stddef.h>. PR: 210890 Reviewed by: dim MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D8194
76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)stddef.h 8.1 (Berkeley) 6/2/93
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*
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* $FreeBSD$
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*/
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#ifndef _STDDEF_H_
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#define _STDDEF_H_
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#include <sys/cdefs.h>
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#include <sys/_null.h>
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#include <sys/_types.h>
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#ifndef _PTRDIFF_T_DECLARED
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typedef __ptrdiff_t ptrdiff_t;
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#define _PTRDIFF_T_DECLARED
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#endif
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#if __BSD_VISIBLE
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#ifndef _RUNE_T_DECLARED
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typedef __rune_t rune_t;
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#define _RUNE_T_DECLARED
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#endif
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#endif
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#ifndef _SIZE_T_DECLARED
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typedef __size_t size_t;
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#define _SIZE_T_DECLARED
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#endif
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#ifndef __cplusplus
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#ifndef _WCHAR_T_DECLARED
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typedef ___wchar_t wchar_t;
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#define _WCHAR_T_DECLARED
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#endif
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#endif
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#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L
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#ifndef __CLANG_MAX_ALIGN_T_DEFINED
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typedef __max_align_t max_align_t;
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#define __CLANG_MAX_ALIGN_T_DEFINED
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#define __GCC_MAX_ALIGN_T
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#endif
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#endif
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#define offsetof(type, member) __offsetof(type, member)
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#endif /* _STDDEF_H_ */
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