/* Copyright (C) 1992-2020 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <https://www.gnu.org/licenses/>.  */

#ifndef	_SYS_CDEFS_H

#define	_SYS_CDEFS_H	1

/* We are almost always included from features.h. */

#ifndef _FEATURES_H

# include <features.h>

#endif

/* The GNU libc does not support any K&R compilers or the traditional mode

   of ISO C compilers anymore.  Check for some of the combinations not

   anymore supported.  */

#if defined __GNUC__ && !defined __STDC__

# error "You need a ISO C conforming compiler to use the glibc headers"

#endif

/* Some user header file might have defined this before.  */

#undef	__P

#undef	__PMT

#ifdef __GNUC__

/* All functions, except those with callbacks or those that

   synchronize memory, are leaf functions.  */

# if __GNUC_PREREQ (4, 6) && !defined _LIBC

#  define __LEAF , __leaf__

#  define __LEAF_ATTR __attribute__ ((__leaf__))

# else

#  define __LEAF

#  define __LEAF_ATTR

# endif

/* GCC can always grok prototypes.  For C++ programs we add throw()

   to help it optimize the function calls.  But this works only with

   gcc 2.8.x and egcs.  For gcc 3.2 and up we even mark C functions

   as non-throwing using a function attribute since programs can use

   the -fexceptions options for C code as well.  */

# if !defined __cplusplus && __GNUC_PREREQ (3, 3)

#  define __THROW	__attribute__ ((__nothrow__ __LEAF))

#  define __THROWNL	__attribute__ ((__nothrow__))

#  define __NTH(fct)	__attribute__ ((__nothrow__ __LEAF)) fct

#  define __NTHNL(fct)  __attribute__ ((__nothrow__)) fct

# else

#  if defined __cplusplus && __GNUC_PREREQ (2,8)

#   define __THROW	throw ()

#   define __THROWNL	throw ()

#   define __NTH(fct)	__LEAF_ATTR fct throw ()

#   define __NTHNL(fct) fct throw ()

#  else

#   define __THROW

#   define __THROWNL

#   define __NTH(fct)	fct

#   define __NTHNL(fct) fct

#  endif

# endif

#else	/* Not GCC.  */

# if (defined __cplusplus						\

      || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))

#  define __inline	inline

# else

#  define __inline		/* No inline functions.  */

# endif

# define __THROW

# define __THROWNL

# define __NTH(fct)	fct

#endif	/* GCC.  */

/* Compilers that are not clang may object to

       #if defined __clang__ && __has_extension(...)

   even though they do not need to evaluate the right-hand side of the &&.  */

#if defined __clang__ && defined __has_extension

# define __glibc_clang_has_extension(ext) __has_extension (ext)

#else

# define __glibc_clang_has_extension(ext) 0

#endif

/* These two macros are not used in glibc anymore.  They are kept here

   only because some other projects expect the macros to be defined.  */

#define __P(args)	args

#define __PMT(args)	args

/* For these things, GCC behaves the ANSI way normally,

   and the non-ANSI way under -traditional.  */

#define __CONCAT(x,y)	x ## y

#define __STRING(x)	#x

/* This is not a typedef so `const __ptr_t' does the right thing.  */

#define __ptr_t void *

/* C++ needs to know that types and declarations are C, not C++.  */

#ifdef	__cplusplus

# define __BEGIN_DECLS	extern "C" {

# define __END_DECLS	}

#else

# define __BEGIN_DECLS

# define __END_DECLS

#endif

/* Fortify support.  */

#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)

#define __bos0(ptr) __builtin_object_size (ptr, 0)

#if __GNUC_PREREQ (4,3)

# define __warndecl(name, msg) \

  extern void name (void) __attribute__((__warning__ (msg)))

# define __warnattr(msg) __attribute__((__warning__ (msg)))

# define __errordecl(name, msg) \

  extern void name (void) __attribute__((__error__ (msg)))

#else

# define __warndecl(name, msg) extern void name (void)

# define __warnattr(msg)

# define __errordecl(name, msg) extern void name (void)

#endif

/* Support for flexible arrays.

   Headers that should use flexible arrays only if they're "real"

   (e.g. only if they won't affect sizeof()) should test

   #if __glibc_c99_flexarr_available.  */

#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L && !defined __HP_cc

# define __flexarr	[]

# define __glibc_c99_flexarr_available 1

#elif __GNUC_PREREQ (2,97)

/* GCC 2.97 supports C99 flexible array members as an extension,

   even when in C89 mode or compiling C++ (any version).  */

# define __flexarr	[]

# define __glibc_c99_flexarr_available 1

#elif defined __GNUC__

/* Pre-2.97 GCC did not support C99 flexible arrays but did have

   an equivalent extension with slightly different notation.  */

# define __flexarr	[0]

# define __glibc_c99_flexarr_available 1

#else

/* Some other non-C99 compiler.  Approximate with [1].  */

# define __flexarr	[1]

# define __glibc_c99_flexarr_available 0

#endif

/* __asm__ ("xyz") is used throughout the headers to rename functions

   at the assembly language level.  This is wrapped by the __REDIRECT

   macro, in order to support compilers that can do this some other

   way.  When compilers don't support asm-names at all, we have to do

   preprocessor tricks instead (which don't have exactly the right

   semantics, but it's the best we can do).

   Example:

   int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid); */

#if defined __GNUC__ && __GNUC__ >= 2

# define __REDIRECT(name, proto, alias) name proto __asm__ (__ASMNAME (#alias))

# ifdef __cplusplus

#  define __REDIRECT_NTH(name, proto, alias) \

     name proto __THROW __asm__ (__ASMNAME (#alias))

#  define __REDIRECT_NTHNL(name, proto, alias) \

     name proto __THROWNL __asm__ (__ASMNAME (#alias))

# else

#  define __REDIRECT_NTH(name, proto, alias) \

     name proto __asm__ (__ASMNAME (#alias)) __THROW

#  define __REDIRECT_NTHNL(name, proto, alias) \

     name proto __asm__ (__ASMNAME (#alias)) __THROWNL

# endif

# define __ASMNAME(cname)  __ASMNAME2 (__USER_LABEL_PREFIX__, cname)

# define __ASMNAME2(prefix, cname) __STRING (prefix) cname

/*

#elif __SOME_OTHER_COMPILER__

# define __REDIRECT(name, proto, alias) name proto; \

	_Pragma("let " #name " = " #alias)

*/

#endif

/* GCC has various useful declarations that can be made with the

   `__attribute__' syntax.  All of the ways we use this do fine if

   they are omitted for compilers that don't understand it. */

#if !defined __GNUC__ || __GNUC__ < 2

# define __attribute__(xyz)	/* Ignore */

#endif

/* At some point during the gcc 2.96 development the `malloc' attribute

   for functions was introduced.  We don't want to use it unconditionally

   (although this would be possible) since it generates warnings.  */

#if __GNUC_PREREQ (2,96)

# define __attribute_malloc__ __attribute__ ((__malloc__))

#else

# define __attribute_malloc__ /* Ignore */

#endif

/* Tell the compiler which arguments to an allocation function

   indicate the size of the allocation.  */

#if __GNUC_PREREQ (4, 3)

# define __attribute_alloc_size__(params) \

  __attribute__ ((__alloc_size__ params))

#else

# define __attribute_alloc_size__(params) /* Ignore.  */

#endif

/* At some point during the gcc 2.96 development the `pure' attribute

   for functions was introduced.  We don't want to use it unconditionally

   (although this would be possible) since it generates warnings.  */

#if __GNUC_PREREQ (2,96)

# define __attribute_pure__ __attribute__ ((__pure__))

#else

# define __attribute_pure__ /* Ignore */

#endif

/* This declaration tells the compiler that the value is constant.  */

#if __GNUC_PREREQ (2,5)

# define __attribute_const__ __attribute__ ((__const__))

#else

# define __attribute_const__ /* Ignore */

#endif

/* At some point during the gcc 3.1 development the `used' attribute

   for functions was introduced.  We don't want to use it unconditionally

   (although this would be possible) since it generates warnings.  */

#if __GNUC_PREREQ (3,1)

# define __attribute_used__ __attribute__ ((__used__))

# define __attribute_noinline__ __attribute__ ((__noinline__))

#else

# define __attribute_used__ __attribute__ ((__unused__))

# define __attribute_noinline__ /* Ignore */

#endif

/* Since version 3.2, gcc allows marking deprecated functions.  */

#if __GNUC_PREREQ (3,2)

# define __attribute_deprecated__ __attribute__ ((__deprecated__))

#else

# define __attribute_deprecated__ /* Ignore */

#endif

/* Since version 4.5, gcc also allows one to specify the message printed

   when a deprecated function is used.  clang claims to be gcc 4.2, but

   may also support this feature.  */

#if __GNUC_PREREQ (4,5) || \

    __glibc_clang_has_extension (__attribute_deprecated_with_message__)

# define __attribute_deprecated_msg__(msg) \

	 __attribute__ ((__deprecated__ (msg)))

#else

# define __attribute_deprecated_msg__(msg) __attribute_deprecated__

#endif

/* At some point during the gcc 2.8 development the `format_arg' attribute

   for functions was introduced.  We don't want to use it unconditionally

   (although this would be possible) since it generates warnings.

   If several `format_arg' attributes are given for the same function, in

   gcc-3.0 and older, all but the last one are ignored.  In newer gccs,

   all designated arguments are considered.  */

#if __GNUC_PREREQ (2,8)

# define __attribute_format_arg__(x) __attribute__ ((__format_arg__ (x)))

#else

# define __attribute_format_arg__(x) /* Ignore */

#endif

/* At some point during the gcc 2.97 development the `strfmon' format

   attribute for functions was introduced.  We don't want to use it

   unconditionally (although this would be possible) since it

   generates warnings.  */

#if __GNUC_PREREQ (2,97)

# define __attribute_format_strfmon__(a,b) \

  __attribute__ ((__format__ (__strfmon__, a, b)))

#else

# define __attribute_format_strfmon__(a,b) /* Ignore */

#endif

/* The nonnull function attribute marks pointer parameters that

   must not be NULL.  Do not define __nonnull if it is already defined,

   for portability when this file is used in Gnulib.  */

#ifndef __nonnull

# if __GNUC_PREREQ (3,3)

#  define __nonnull(params) __attribute__ ((__nonnull__ params))

# else

#  define __nonnull(params)

# endif

#endif

/* If fortification mode, we warn about unused results of certain

   function calls which can lead to problems.  */

#if __GNUC_PREREQ (3,4)

# define __attribute_warn_unused_result__ \

   __attribute__ ((__warn_unused_result__))

# if defined __USE_FORTIFY_LEVEL && __USE_FORTIFY_LEVEL > 0

#  define __wur __attribute_warn_unused_result__

# endif

#else

# define __attribute_warn_unused_result__ /* empty */

#endif

#ifndef __wur

# define __wur /* Ignore */

#endif

/* Forces a function to be always inlined.  */

#if __GNUC_PREREQ (3,2)

/* The Linux kernel defines __always_inline in stddef.h (283d7573), and

   it conflicts with this definition.  Therefore undefine it first to

   allow either header to be included first.  */

# undef __always_inline

# define __always_inline __inline __attribute__ ((__always_inline__))

#else

# undef __always_inline

# define __always_inline __inline

#endif

/* Associate error messages with the source location of the call site rather

   than with the source location inside the function.  */

#if __GNUC_PREREQ (4,3)

# define __attribute_artificial__ __attribute__ ((__artificial__))

#else

# define __attribute_artificial__ /* Ignore */

#endif

/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99

   inline semantics, unless -fgnu89-inline is used.  Using __GNUC_STDC_INLINE__

   or __GNUC_GNU_INLINE is not a good enough check for gcc because gcc versions

   older than 4.3 may define these macros and still not guarantee GNU inlining

   semantics.

   clang++ identifies itself as gcc-4.2, but has support for GNU inlining

   semantics, that can be checked for by using the __GNUC_STDC_INLINE_ and

   __GNUC_GNU_INLINE__ macro definitions.  */

#if (!defined __cplusplus || __GNUC_PREREQ (4,3) \

     || (defined __clang__ && (defined __GNUC_STDC_INLINE__ \

			       || defined __GNUC_GNU_INLINE__)))

# if defined __GNUC_STDC_INLINE__ || defined __cplusplus

#  define __extern_inline extern __inline __attribute__ ((__gnu_inline__))

#  define __extern_always_inline \

  extern __always_inline __attribute__ ((__gnu_inline__))

# else

#  define __extern_inline extern __inline

#  define __extern_always_inline extern __always_inline

# endif

#endif

#ifdef __extern_always_inline

# define __fortify_function __extern_always_inline __attribute_artificial__

#endif

/* GCC 4.3 and above allow passing all anonymous arguments of an

   __extern_always_inline function to some other vararg function.  */

#if __GNUC_PREREQ (4,3)

# define __va_arg_pack() __builtin_va_arg_pack ()

# define __va_arg_pack_len() __builtin_va_arg_pack_len ()

#endif

/* It is possible to compile containing GCC extensions even if GCC is

   run in pedantic mode if the uses are carefully marked using the

   `__extension__' keyword.  But this is not generally available before

   version 2.8.  */

#if !__GNUC_PREREQ (2,8)

# define __extension__		/* Ignore */

#endif

/* __restrict is known in EGCS 1.2 and above. */

#if !__GNUC_PREREQ (2,92)

# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L

#  define __restrict	restrict

# else

#  define __restrict	/* Ignore */

# endif

#endif

/* ISO C99 also allows to declare arrays as non-overlapping.  The syntax is

     array_name[restrict]

   GCC 3.1 supports this.  */

#if __GNUC_PREREQ (3,1) && !defined __GNUG__

# define __restrict_arr	__restrict

#else

# ifdef __GNUC__

#  define __restrict_arr	/* Not supported in old GCC.  */

# else

#  if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L

#   define __restrict_arr	restrict

#  else

/* Some other non-C99 compiler.  */

#   define __restrict_arr	/* Not supported.  */

#  endif

# endif

#endif

#if __GNUC__ >= 3

# define __glibc_unlikely(cond)	__builtin_expect ((cond), 0)

# define __glibc_likely(cond)	__builtin_expect ((cond), 1)

#else

# define __glibc_unlikely(cond)	(cond)

# define __glibc_likely(cond)	(cond)

#endif

#ifdef __has_attribute

# define __glibc_has_attribute(attr)	__has_attribute (attr)

#else

# define __glibc_has_attribute(attr)	0

#endif

#if (!defined _Noreturn \

     && (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112 \

     &&  !__GNUC_PREREQ (4,7))

# if __GNUC_PREREQ (2,8)

#  define _Noreturn __attribute__ ((__noreturn__))

# else

#  define _Noreturn

# endif

#endif

#if __GNUC_PREREQ (8, 0)

/* Describes a char array whose address can safely be passed as the first

   argument to strncpy and strncat, as the char array is not necessarily

   a NUL-terminated string.  */

# define __attribute_nonstring__ __attribute__ ((__nonstring__))

#else

# define __attribute_nonstring__

#endif

#if (!defined _Static_assert && !defined __cplusplus \

     && (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112 \

     && (!__GNUC_PREREQ (4, 6) || defined __STRICT_ANSI__))

# define _Static_assert(expr, diagnostic) \

    extern int (*__Static_assert_function (void)) \

      [!!sizeof (struct { int __error_if_negative: (expr) ? 2 : -1; })]

#endif

/* The #ifndef lets Gnulib avoid including these on non-glibc

   platforms, where the includes typically do not exist.  */

#ifndef __WORDSIZE

# include <bits/wordsize.h>

# include <bits/long-double.h>

#endif

#if defined __LONG_DOUBLE_MATH_OPTIONAL && defined __NO_LONG_DOUBLE_MATH

# define __LDBL_COMPAT 1

# ifdef __REDIRECT

#  define __LDBL_REDIR1(name, proto, alias) __REDIRECT (name, proto, alias)

#  define __LDBL_REDIR(name, proto) \

  __LDBL_REDIR1 (name, proto, __nldbl_##name)

#  define __LDBL_REDIR1_NTH(name, proto, alias) __REDIRECT_NTH (name, proto, alias)

#  define __LDBL_REDIR_NTH(name, proto) \

  __LDBL_REDIR1_NTH (name, proto, __nldbl_##name)

#  define __LDBL_REDIR1_DECL(name, alias) \

  extern __typeof (name) name __asm (__ASMNAME (#alias));

#  define __LDBL_REDIR_DECL(name) \

  extern __typeof (name) name __asm (__ASMNAME ("__nldbl_" #name));

#  define __REDIRECT_LDBL(name, proto, alias) \

  __LDBL_REDIR1 (name, proto, __nldbl_##alias)

#  define __REDIRECT_NTH_LDBL(name, proto, alias) \

  __LDBL_REDIR1_NTH (name, proto, __nldbl_##alias)

# endif

#endif

#if !defined __LDBL_COMPAT || !defined __REDIRECT

# define __LDBL_REDIR1(name, proto, alias) name proto

# define __LDBL_REDIR(name, proto) name proto

# define __LDBL_REDIR1_NTH(name, proto, alias) name proto __THROW

# define __LDBL_REDIR_NTH(name, proto) name proto __THROW

# define __LDBL_REDIR_DECL(name)

# ifdef __REDIRECT

#  define __REDIRECT_LDBL(name, proto, alias) __REDIRECT (name, proto, alias)

#  define __REDIRECT_NTH_LDBL(name, proto, alias) \

  __REDIRECT_NTH (name, proto, alias)

# endif

#endif

/* __glibc_macro_warning (MESSAGE) issues warning MESSAGE.  This is

   intended for use in preprocessor macros.

   Note: MESSAGE must be a _single_ string; concatenation of string

   literals is not supported.  */

#if __GNUC_PREREQ (4,8) || __glibc_clang_prereq (3,5)

# define __glibc_macro_warning1(message) _Pragma (#message)

# define __glibc_macro_warning(message) \

  __glibc_macro_warning1 (GCC warning message)

#else

# define __glibc_macro_warning(msg)

#endif

/* Generic selection (ISO C11) is a C-only feature, available in GCC

   since version 4.9.  Previous versions do not provide generic

   selection, even though they might set __STDC_VERSION__ to 201112L,

   when in -std=c11 mode.  Thus, we must check for !defined __GNUC__

   when testing __STDC_VERSION__ for generic selection support.

   On the other hand, Clang also defines __GNUC__, so a clang-specific

   check is required to enable the use of generic selection.  */

#if !defined __cplusplus \

    && (__GNUC_PREREQ (4, 9) \

	|| __glibc_clang_has_extension (c_generic_selections) \

	|| (!defined __GNUC__ && defined __STDC_VERSION__ \

	    && __STDC_VERSION__ >= 201112L))

# define __HAVE_GENERIC_SELECTION 1

#else

# define __HAVE_GENERIC_SELECTION 0

#endif

#endif	 /* sys/cdefs.h */