Hallo, dies ist ein Test.

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/*
 * Copyright (c) 1988, 2017, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef _STDDEF_H
#define	_STDDEF_H

#include <sys/isa_defs.h>
#include <iso/stddef_iso.h>

/*
 * Allow global visibility for symbols defined in
 * C++ "std" namespace in <iso/stddef_iso.h>.
 */
#if __cplusplus >= 199711L
using std::ptrdiff_t;
using std::size_t;
#endif

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * wchar_t is a built-in type in standard C++ and as such is not
 * defined here when using standard C++. However, the GNU compiler
 * fixincludes utility nonetheless creates its own version of this
 * header for use by gcc and g++. In that version it adds a redundant
 * guard for __cplusplus. To avoid the creation of a gcc/g++ specific
 * header we need to include the following magic comment:
 *
 * we must use the C++ compiler's type
 *
 * The above comment should not be removed or changed until GNU
 * gcc/fixinc/inclhack.def is updated to bypass this header.
 */
#if !defined(__cplusplus) || (__cplusplus < 199711L && !defined(__GNUG__))
#ifndef _WCHAR_T
#define	_WCHAR_T
#if defined(_LP64)
typedef int	wchar_t;
#else
typedef long    wchar_t;
#endif
#endif  /* !_WCHAR_T */
#endif	/* !defined(__cplusplus) ... */

/* C11 max_align_t atomic support */
#if (__STDC_VERSION__ - 0 >= 201112L) || (__cplusplus >= 201103L)

#ifndef _MAX_ALIGN_T
#define	_MAX_ALIGN_T

/* GCC, Clang and llvm need alignment attributes */
#if defined(__GNUC__) || defined(__clang__) || defined(__llvm__)
#define	_ALIGNMENT(x) __attribute__((__aligned__(__alignof__(x))))
#endif	/* defined(__GNUC__) ... */

#if (__STDC_NO_ATOMICS__ - 0 == 1) || defined(__cplusplus)
#define	__ATOMIC
#else
#define	__ATOMIC _Atomic
#endif	/* __STDC_NO_ATOMICS__  ... */

#if (__STDC_NO_COMPLEX__ - 0 == 1) || defined(__cplusplus)
#define	__COMPLEX
#else
#define	__COMPLEX _Complex
#endif	/* __STDC_NO_COMPLEX__ ... */

typedef struct {
#if defined(__clang__) || defined(__llvm__)
	long long __clang_max_align_nonce1 _ALIGNMENT(long long);
	long double __clang_max_align_nonce2 _ALIGNMENT(long double);
#elif defined(__GNUC__)
	long long __max_align_ll _ALIGNMENT(long long);
	long double __max_align_ld _ALIGNMENT(long double);
#else
	__ATOMIC long long __max_align_ll;
	__ATOMIC long double __max_align_ld;

#if defined(__i386) || defined(__amd64)
	__ATOMIC double __COMPLEX  __max_align_d;
#endif	/* defined(__i386) || defined(__amd64) */
#endif	/* defined(__clang__) || defined(__llvm__) */
} max_align_t;
#endif	/* _MAX_ALIGN_T */

#ifdef	__ATOMIC
#undef	__ATOMIC
#endif
#ifdef	__COMPLEX
#undef	__COMPLEX
#endif
#ifdef	_ALIGNMENT
#undef	_ALIGNMENT
#endif
#endif	/* (__STDC_VERSION__ - 0 >= 201112L) || (__cplusplus >= 201103L) */

#ifdef	__cplusplus
}
#endif
#endif	/* _STDDEF_H */