freebsd-src/include/stddef.h
Robert Clausecker fc88be257e
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Revert "stddef.h: add unreachable() for C23 compliance"
Seems like a number of ports are *really* unhappy with this new
macro.  These ports will have to be fixed and the patch reworked
to perhaps not affect C++ (see D54041).  A general discussion on
how we expose new language features may also need to take place.

Reported by:	many people
Approved by:	markj (mentor)

This reverts commit b381d09802.
2025-12-05 00:25:10 +01:00

76 lines
2.5 KiB
C++

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _STDDEF_H_
#define _STDDEF_H_
#include <sys/_null.h>
#include <sys/_types.h>
#include <sys/_visible.h>
#ifndef _PTRDIFF_T_DECLARED
typedef __ptrdiff_t ptrdiff_t;
#define _PTRDIFF_T_DECLARED
#endif
#ifndef _SIZE_T_DECLARED
typedef __size_t size_t;
#define _SIZE_T_DECLARED
#endif
#ifndef __cplusplus
#ifndef _WCHAR_T_DECLARED
typedef ___wchar_t wchar_t;
#define _WCHAR_T_DECLARED
#endif
#endif
#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
#ifndef __CLANG_MAX_ALIGN_T_DEFINED
typedef __max_align_t max_align_t;
#define __CLANG_MAX_ALIGN_T_DEFINED
#define _GCC_MAX_ALIGN_T
#endif
#endif
#ifndef offsetof
#define offsetof(type, field) __builtin_offsetof(type, field)
#endif
#if __EXT1_VISIBLE
/* ISO/IEC 9899:2011 K.3.3.2 */
#ifndef _RSIZE_T_DEFINED
#define _RSIZE_T_DEFINED
typedef size_t rsize_t;
#endif
#endif /* __EXT1_VISIBLE */
#endif /* _STDDEF_H_ */