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Edit File : cdefs.h \| Size : 20.20 KB
/* Copyright (C) 1992-2018 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 <http://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) / Use __builtin_dynamic_object_size at _FORTIFY_SOURCE=3 when available. / #if __USE_FORTIFY_LEVEL == 3 && (__glibc_clang_prereq (9, 0) \ \|\| __GNUC_PREREQ (12, 0)) # define __glibc_objsize0(__o) __builtin_dynamic_object_size (__o, 0) # define __glibc_objsize(__o) __builtin_dynamic_object_size (__o, 1) #else # define __glibc_objsize0(__o) __bos0 (__o) # define __glibc_objsize(__o) __bos (__o) #endif #if __USE_FORTIFY_LEVEL > 0 / Compile time conditions to choose between the regular, _chk and _chk_warn variants. These conditions should get evaluated to constant and optimized away. / #define __glibc_safe_len_cond(__l, __s, __osz) ((__l) <= (__osz) / (__s)) #define __glibc_unsigned_or_positive(__l) \ ((__typeof (__l)) 0 < (__typeof (__l)) -1 \ \|\| (__builtin_constant_p (__l) && (__l) > 0)) / Length is known to be safe at compile time if the __L * __S <= __OBJSZ condition can be folded to a constant and if it is true, or unknown (-1) / #define __glibc_safe_or_unknown_len(__l, __s, __osz) \ ((__builtin_constant_p (__osz) && (__osz) == (__SIZE_TYPE__) -1) \ \|\| (__glibc_unsigned_or_positive (__l) \ && __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), \ (__s), (__osz))) \ && __glibc_safe_len_cond ((__SIZE_TYPE__) (__l), (__s), (__osz)))) / Conversely, we know at compile time that the length is unsafe if the __L * __S <= __OBJSZ condition can be folded to a constant and if it is false. / #define __glibc_unsafe_len(__l, __s, __osz) \ (__glibc_unsigned_or_positive (__l) \ && __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), \ __s, __osz)) \ && !__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), __s, __osz)) / Fortify function f. __f_alias, __f_chk and __f_chk_warn must be declared. / #define __glibc_fortify(f, __l, __s, __osz, ...) \ (__glibc_safe_or_unknown_len (__l, __s, __osz) \ ? __ ## f ## _alias (__VA_ARGS__) \ : (__glibc_unsafe_len (__l, __s, __osz) \ ? __ ## f ## _chk_warn (__VA_ARGS__, __osz) \ : __ ## f ## _chk (__VA_ARGS__, __osz))) / Fortify function f, where object size argument passed to f is the number of elements and not total size. / #define __glibc_fortify_n(f, __l, __s, __osz, ...) \ (__glibc_safe_or_unknown_len (__l, __s, __osz) \ ? __ ## f ## _alias (__VA_ARGS__) \ : (__glibc_unsafe_len (__l, __s, __osz) \ ? __ ## f ## _chk_warn (__VA_ARGS__, (__osz) / (__s)) \ : __ ## f ## _chk (__VA_ARGS__, (__osz) / (__s)))) #endif #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 # 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 nonull function attribute allows to mark pointer parameters which must not be NULL. / #if __GNUC_PREREQ (3,3) # define __nonnull(params) __attribute__ ((__nonnull__ params)) #else # define __nonnull(params) #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 __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 fot 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 #include <bits/wordsize.h> #include <bits/long-double.h> #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 */ Back

Edit File : cdefs.h | Size : 20.20 KB

/* Copyright (C) 1992-2018 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
   <http://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)

/* Use __builtin_dynamic_object_size at _FORTIFY_SOURCE=3 when available.  */
#if __USE_FORTIFY_LEVEL == 3 && (__glibc_clang_prereq (9, 0)		      \
				 || __GNUC_PREREQ (12, 0))
# define __glibc_objsize0(__o) __builtin_dynamic_object_size (__o, 0)
# define __glibc_objsize(__o) __builtin_dynamic_object_size (__o, 1)
#else
# define __glibc_objsize0(__o) __bos0 (__o)
# define __glibc_objsize(__o) __bos (__o)
#endif

#if __USE_FORTIFY_LEVEL > 0
/* Compile time conditions to choose between the regular, _chk and _chk_warn
   variants.  These conditions should get evaluated to constant and optimized
   away.  */

#define __glibc_safe_len_cond(__l, __s, __osz) ((__l) <= (__osz) / (__s))
#define __glibc_unsigned_or_positive(__l) \
  ((__typeof (__l)) 0 < (__typeof (__l)) -1				      \
   || (__builtin_constant_p (__l) && (__l) > 0))

/* Length is known to be safe at compile time if the __L * __S <= __OBJSZ
   condition can be folded to a constant and if it is true, or unknown (-1) */
#define __glibc_safe_or_unknown_len(__l, __s, __osz) \
  ((__builtin_constant_p (__osz) && (__osz) == (__SIZE_TYPE__) -1)	      \
   || (__glibc_unsigned_or_positive (__l)				      \
       && __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), \
						       (__s), (__osz)))	      \
       && __glibc_safe_len_cond ((__SIZE_TYPE__) (__l), (__s), (__osz))))

/* Conversely, we know at compile time that the length is unsafe if the
   __L * __S <= __OBJSZ condition can be folded to a constant and if it is
   false.  */
#define __glibc_unsafe_len(__l, __s, __osz) \
  (__glibc_unsigned_or_positive (__l)					      \
   && __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l),     \
						   __s, __osz))		      \
   && !__glibc_safe_len_cond ((__SIZE_TYPE__) (__l), __s, __osz))

/* Fortify function f.  __f_alias, __f_chk and __f_chk_warn must be
   declared.  */

#define __glibc_fortify(f, __l, __s, __osz, ...) \
  (__glibc_safe_or_unknown_len (__l, __s, __osz)			      \
   ? __ ## f ## _alias (__VA_ARGS__)					      \
   : (__glibc_unsafe_len (__l, __s, __osz)				      \
      ? __ ## f ## _chk_warn (__VA_ARGS__, __osz)			      \
      : __ ## f ## _chk (__VA_ARGS__, __osz)))

/* Fortify function f, where object size argument passed to f is the number of
   elements and not total size.  */

#define __glibc_fortify_n(f, __l, __s, __osz, ...) \
  (__glibc_safe_or_unknown_len (__l, __s, __osz)			      \
   ? __ ## f ## _alias (__VA_ARGS__)					      \
   : (__glibc_unsafe_len (__l, __s, __osz)				      \
      ? __ ## f ## _chk_warn (__VA_ARGS__, (__osz) / (__s))		      \
      : __ ## f ## _chk (__VA_ARGS__, (__osz) / (__s))))
#endif

#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
# 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 nonull function attribute allows to mark pointer parameters which
   must not be NULL.  */
#if __GNUC_PREREQ (3,3)
# define __nonnull(params) __attribute__ ((__nonnull__ params))
#else
# define __nonnull(params)
#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 __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 fot 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

#include <bits/wordsize.h>
#include <bits/long-double.h>

#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 */

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