-/* Copyright (C) 1992, 93, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2019 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ 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>
+# 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. */
-# if defined __cplusplus && __GNUC_MINOR__ >= 8
-# define __THROW throw ()
+ 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
-# define __THROW
+# 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
-# define __P(args) args __THROW
-/* This macro will be used for functions which might take C++ callback
- functions. */
-# define __PMT(args) args
-# define __DOTS , ...
#else /* Not GCC. */
-# define __inline /* No inline functions. */
-
-# if (defined __STDC__ && __STDC__) || defined __cplusplus
-
-# define __P(args) args
-# define __PMT(args) args
-# define __const const
-# define __signed signed
-# define __volatile volatile
-# define __DOTS , ...
+# if (defined __cplusplus \
+ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
+# define __inline inline
+# else
+# define __inline /* No inline functions. */
+# endif
-# else /* Not ANSI C or C++. */
+# define __THROW
+# define __THROWNL
+# define __NTH(fct) fct
-# define __P(args) () /* No prototypes. */
-# define __PMT(args) ()
-# define __const /* No ANSI C keywords. */
-# define __signed
-# define __volatile
-# define __DOTS
+#endif /* GCC. */
-# endif /* ANSI C or C++. */
+/* 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
-#endif /* GCC. */
+/* 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. */
-#if defined __STDC__ && __STDC__
-
-# define __CONCAT(x,y) x ## y
-# define __STRING(x) #x
+#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 *
-# define __long_double_t long double
-
-#else
-
-# define __CONCAT(x,y) x/**/y
-# define __STRING(x) "x"
-
-# define __ptr_t char *
-# define __long_double_t long double
-
-/* The BSD header files use the ANSI keywords unmodified (this means that
- old programs may lose if they use the new keywords as identifiers), but
- those names are not available under -traditional. We define them to
- their __ versions, which are taken care of above. */
-#ifdef __USE_BSD
-# define const __const
-# define signed __signed
-# define volatile __volatile
-#endif
-
-#endif /* __STDC__ */
+#define __ptr_t void *
/* C++ needs to know that types and declarations are C, not C++. */
# 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
+# 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
semantics, but it's the best we can do).
Example:
- int __REDIRECT(setpgrp, __P((__pid_t pid, __pid_t pgrp)), setpgid); */
+ 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 __attribute__(xyz)
# define __REDIRECT(name, proto, alias) name proto; \
_Pragma("let " #name " = " #alias)
*/
`__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
-# define __attribute__(xyz) /* Ignore. */
+/* 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 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 !defined __GNUC__ || __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
-
+#if !__GNUC_PREREQ (2,8)
# define __extension__ /* Ignore */
-
#endif
/* __restrict is known in EGCS 1.2 and above. */
-#if !defined __GNUC__ || __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 92)
+#if !__GNUC_PREREQ (2,92)
+# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
+# define __restrict restrict
+# else
+# define __restrict /* Ignore */
+# endif
+#endif
-# define __restrict /* Ignore */
+/* 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
+
+#ifdef __has_include
+# define __glibc_has_include(header) __has_include (header)
+#else
+# define __glibc_has_include(header) 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
+
+/* Undefine (also defined in libc-symbols.h). */
+#undef __attribute_copy__
+#if __GNUC_PREREQ (9, 0)
+/* Copies attributes from the declaration or type referenced by
+ the argument. */
+# define __attribute_copy__(arg) __attribute__ ((__copy__ (arg)))
+#else
+# define __attribute_copy__(arg)
+#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 */
projects / thirdparty / glibc.git / blobdiff