-/* Copyright (C) 1992-2002, 2004, 2005, 2006, 2007, 2009, 2011, 2012
- 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
# 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. */
-# define __inline /* No inline functions. */
+# if (defined __cplusplus \
+ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
+# define __inline inline
+# else
+# define __inline /* No inline functions. */
+# endif
# define __THROW
# define __THROWNL
#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
/* This is not a typedef so `const __ptr_t' does the right thing. */
#define __ptr_t void *
-#define __long_double_t long double
/* C++ needs to know that types and declarations are C, not C++. */
#endif
-/* The standard library needs the functions from the ISO C90 standard
- in the std namespace. At the same time we want to be safe for
- future changes and we include the ISO C99 code in the non-standard
- namespace __c99. The C++ wrapper header take case of adding the
- definitions to the global namespace. */
-#if defined __cplusplus && defined _GLIBCPP_USE_NAMESPACES
-# define __BEGIN_NAMESPACE_STD namespace std {
-# define __END_NAMESPACE_STD }
-# define __USING_NAMESPACE_STD(name) using std::name;
-# define __BEGIN_NAMESPACE_C99 namespace __c99 {
-# define __END_NAMESPACE_C99 }
-# define __USING_NAMESPACE_C99(name) using __c99::name;
-#else
-/* For compatibility we do not add the declarations into any
- namespace. They will end up in the global namespace which is what
- old code expects. */
-# define __BEGIN_NAMESPACE_STD
-# define __END_NAMESPACE_STD
-# define __USING_NAMESPACE_STD(name)
-# define __BEGIN_NAMESPACE_C99
-# define __END_NAMESPACE_C99
-# define __USING_NAMESPACE_C99(name)
-#endif
-
-
-/* Support for bounded pointers. */
-#ifndef __BOUNDED_POINTERS__
-# define __bounded /* nothing */
-# define __unbounded /* nothing */
-# define __ptrvalue /* nothing */
-#endif
-
-
/* Fortify support. */
#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
#define __bos0(ptr) __builtin_object_size (ptr, 0)
-#define __fortify_function __extern_always_inline __attribute_artificial__
#if __GNUC_PREREQ (4,3)
# define __warndecl(name, msg) \
# define __errordecl(name, msg) extern void name (void)
#endif
-/* Support for flexible arrays. */
-#if __GNUC_PREREQ (2,97)
-/* GCC 2.97 supports C99 flexible array members. */
+/* 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
-# ifdef __GNUC__
-# define __flexarr [0]
-# else
-# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
-# define __flexarr []
-# else
/* Some other non-C99 compiler. Approximate with [1]. */
-# define __flexarr [1]
-# endif
-# endif
+# define __flexarr [1]
+# define __glibc_c99_flexarr_available 0
#endif
# 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. */
# define __attribute_noinline__ /* Ignore */
#endif
-/* gcc allows marking deprecated functions. */
+/* 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.
/* 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
#endif
/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
- inline semantics, unless -fgnu89-inline is used. */
-#if !defined __cplusplus || __GNUC_PREREQ (4,3)
+ 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 \
# 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)
/* __restrict is known in EGCS 1.2 and above. */
#if !__GNUC_PREREQ (2,92)
-# define __restrict /* Ignore */
+# 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
#endif
#if __GNUC__ >= 3
-# define __glibc_unlikely(cond) __builtin_expect((cond), 0)
+# 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_unlikely(cond) (cond)
+# 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
# 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