[newlib-cygwin.git] / include / ansidecl.h

/* Compiler compatibility macros
   Copyright (C) 1991-2024 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

/* For ease of writing code which uses GCC extensions but needs to be
   portable to other compilers, we provide the GCC_VERSION macro that
   simplifies testing __GNUC__ and __GNUC_MINOR__ together, and various
   wrappers around __attribute__.  Also, __extension__ will be #defined
   to nothing if it doesn't work.  See below.  */

#ifndef	_ANSIDECL_H
#define _ANSIDECL_H	1

#ifdef __cplusplus
extern "C" {
#endif

/* Every source file includes this file,
   so they will all get the switch for lint.  */
/* LINTLIBRARY */

/* Using MACRO(x,y) in cpp #if conditionals does not work with some
   older preprocessors.  Thus we can't define something like this:

#define HAVE_GCC_VERSION(MAJOR, MINOR) \
  (__GNUC__ > (MAJOR) || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR)))

and then test "#if HAVE_GCC_VERSION(2,7)".

So instead we use the macro below and test it against specific values.  */

/* This macro simplifies testing whether we are using gcc, and if it
   is of a particular minimum version. (Both major & minor numbers are
   significant.)  This macro will evaluate to 0 if we are not using
   gcc at all.  */
#ifndef GCC_VERSION
#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
#endif /* GCC_VERSION */

/* inline requires special treatment; it's in C99, and GCC >=2.7 supports
   it too, but it's not in C89.  */
#undef inline
#if (!defined(__cplusplus) && __STDC_VERSION__ >= 199901L) || defined(__cplusplus) || (defined(__SUNPRO_C) && defined(__C99FEATURES__))
/* it's a keyword */
#else
# if GCC_VERSION >= 2007
#  define inline __inline__   /* __inline__ prevents -pedantic warnings */
# else
#  define inline  /* nothing */
# endif
#endif

/* Define macros for some gcc attributes.  This permits us to use the
   macros freely, and know that they will come into play for the
   version of gcc in which they are supported.  */

#if (GCC_VERSION < 2007)
# define __attribute__(x)
#endif

/* Attribute __malloc__ on functions was valid as of gcc 2.96. */
#ifndef ATTRIBUTE_MALLOC
# if (GCC_VERSION >= 2096)
#  define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
# else
#  define ATTRIBUTE_MALLOC
# endif /* GNUC >= 2.96 */
#endif /* ATTRIBUTE_MALLOC */

/* Attributes on labels were valid as of gcc 2.93 and g++ 4.5.  For
   g++ an attribute on a label must be followed by a semicolon.  */
#ifndef ATTRIBUTE_UNUSED_LABEL
# ifndef __cplusplus
#  if GCC_VERSION >= 2093
#   define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
#  else
#   define ATTRIBUTE_UNUSED_LABEL
#  endif
# else
#  if GCC_VERSION >= 4005
#   define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED ;
#  else
#   define ATTRIBUTE_UNUSED_LABEL
#  endif
# endif
#endif

/* Similarly to ARG_UNUSED below.  Prior to GCC 3.4, the C++ frontend
   couldn't parse attributes placed after the identifier name, and now
   the entire compiler is built with C++.  */
#ifndef ATTRIBUTE_UNUSED
#if GCC_VERSION >= 3004
#  define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#else
#define ATTRIBUTE_UNUSED
#endif
#endif /* ATTRIBUTE_UNUSED */

/* Before GCC 3.4, the C++ frontend couldn't parse attributes placed after the
   identifier name.  */
#if ! defined(__cplusplus) || (GCC_VERSION >= 3004)
# define ARG_UNUSED(NAME) NAME ATTRIBUTE_UNUSED
#else /* !__cplusplus || GNUC >= 3.4 */
# define ARG_UNUSED(NAME) NAME
#endif /* !__cplusplus || GNUC >= 3.4 */

#ifndef ATTRIBUTE_NORETURN
#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
#endif /* ATTRIBUTE_NORETURN */

/* Attribute `nonnull' was valid as of gcc 3.3.  */
#ifndef ATTRIBUTE_NONNULL
# if (GCC_VERSION >= 3003)
#  define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m)))
# else
#  define ATTRIBUTE_NONNULL(m)
# endif /* GNUC >= 3.3 */
#endif /* ATTRIBUTE_NONNULL */

/* Attribute `returns_nonnull' was valid as of gcc 4.9.  */
#ifndef ATTRIBUTE_RETURNS_NONNULL
# if (GCC_VERSION >= 4009)
#  define ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
# else
#  define ATTRIBUTE_RETURNS_NONNULL
# endif /* GNUC >= 4.9 */
#endif /* ATTRIBUTE_RETURNS_NONNULL */

/* Attribute `pure' was valid as of gcc 3.0.  */
#ifndef ATTRIBUTE_PURE
# if (GCC_VERSION >= 3000)
#  define ATTRIBUTE_PURE __attribute__ ((__pure__))
# else
#  define ATTRIBUTE_PURE
# endif /* GNUC >= 3.0 */
#endif /* ATTRIBUTE_PURE */

/* Use ATTRIBUTE_PRINTF when the format specifier must not be NULL.
   This was the case for the `printf' format attribute by itself
   before GCC 3.3, but as of 3.3 we need to add the `nonnull'
   attribute to retain this behavior.  */
#ifndef ATTRIBUTE_PRINTF
#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) ATTRIBUTE_NONNULL(m)
#define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2)
#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
#define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4)
#define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5)
#define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6)
#endif /* ATTRIBUTE_PRINTF */

/* Use ATTRIBUTE_FPTR_PRINTF when the format attribute is to be set on
   a function pointer.  Format attributes were allowed on function
   pointers as of gcc 3.1.  */
#ifndef ATTRIBUTE_FPTR_PRINTF
# if (GCC_VERSION >= 3001)
#  define ATTRIBUTE_FPTR_PRINTF(m, n) ATTRIBUTE_PRINTF(m, n)
# else
#  define ATTRIBUTE_FPTR_PRINTF(m, n)
# endif /* GNUC >= 3.1 */
# define ATTRIBUTE_FPTR_PRINTF_1 ATTRIBUTE_FPTR_PRINTF(1, 2)
# define ATTRIBUTE_FPTR_PRINTF_2 ATTRIBUTE_FPTR_PRINTF(2, 3)
# define ATTRIBUTE_FPTR_PRINTF_3 ATTRIBUTE_FPTR_PRINTF(3, 4)
# define ATTRIBUTE_FPTR_PRINTF_4 ATTRIBUTE_FPTR_PRINTF(4, 5)
# define ATTRIBUTE_FPTR_PRINTF_5 ATTRIBUTE_FPTR_PRINTF(5, 6)
#endif /* ATTRIBUTE_FPTR_PRINTF */

/* Use ATTRIBUTE_NULL_PRINTF when the format specifier may be NULL.  A
   NULL format specifier was allowed as of gcc 3.3.  */
#ifndef ATTRIBUTE_NULL_PRINTF
# if (GCC_VERSION >= 3003)
#  define ATTRIBUTE_NULL_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
# else
#  define ATTRIBUTE_NULL_PRINTF(m, n)
# endif /* GNUC >= 3.3 */
# define ATTRIBUTE_NULL_PRINTF_1 ATTRIBUTE_NULL_PRINTF(1, 2)
# define ATTRIBUTE_NULL_PRINTF_2 ATTRIBUTE_NULL_PRINTF(2, 3)
# define ATTRIBUTE_NULL_PRINTF_3 ATTRIBUTE_NULL_PRINTF(3, 4)
# define ATTRIBUTE_NULL_PRINTF_4 ATTRIBUTE_NULL_PRINTF(4, 5)
# define ATTRIBUTE_NULL_PRINTF_5 ATTRIBUTE_NULL_PRINTF(5, 6)
#endif /* ATTRIBUTE_NULL_PRINTF */

/* Attribute `sentinel' was valid as of gcc 3.5.  */
#ifndef ATTRIBUTE_SENTINEL
# if (GCC_VERSION >= 3005)
#  define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__))
# else
#  define ATTRIBUTE_SENTINEL
# endif /* GNUC >= 3.5 */
#endif /* ATTRIBUTE_SENTINEL */


#ifndef ATTRIBUTE_ALIGNED_ALIGNOF
# if (GCC_VERSION >= 3000)
#  define ATTRIBUTE_ALIGNED_ALIGNOF(m) __attribute__ ((__aligned__ (__alignof__ (m))))
# else
#  define ATTRIBUTE_ALIGNED_ALIGNOF(m)
# endif /* GNUC >= 3.0 */
#endif /* ATTRIBUTE_ALIGNED_ALIGNOF */

/* Useful for structures whose layout must match some binary specification
   regardless of the alignment and padding qualities of the compiler.  */
#ifndef ATTRIBUTE_PACKED
# define ATTRIBUTE_PACKED __attribute__ ((packed))
#endif

/* Attribute `hot' and `cold' was valid as of gcc 4.3.  */
#ifndef ATTRIBUTE_COLD
# if (GCC_VERSION >= 4003)
#  define ATTRIBUTE_COLD __attribute__ ((__cold__))
# else
#  define ATTRIBUTE_COLD
# endif /* GNUC >= 4.3 */
#endif /* ATTRIBUTE_COLD */
#ifndef ATTRIBUTE_HOT
# if (GCC_VERSION >= 4003)
#  define ATTRIBUTE_HOT __attribute__ ((__hot__))
# else
#  define ATTRIBUTE_HOT
# endif /* GNUC >= 4.3 */
#endif /* ATTRIBUTE_HOT */

/* Attribute 'no_sanitize_undefined' was valid as of gcc 4.9.  */
#ifndef ATTRIBUTE_NO_SANITIZE_UNDEFINED
# if (GCC_VERSION >= 4009)
#  define ATTRIBUTE_NO_SANITIZE_UNDEFINED __attribute__ ((no_sanitize_undefined))
# else
#  define ATTRIBUTE_NO_SANITIZE_UNDEFINED
# endif /* GNUC >= 4.9 */
#endif /* ATTRIBUTE_NO_SANITIZE_UNDEFINED */

/* Attribute 'nonstring' was valid as of gcc 8.  */
#ifndef ATTRIBUTE_NONSTRING
# if GCC_VERSION >= 8000
#  define ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
# else
#  define ATTRIBUTE_NONSTRING
# endif
#endif

/* Attribute `alloc_size' was valid as of gcc 4.3.  */
#ifndef ATTRIBUTE_RESULT_SIZE_1
# if (GCC_VERSION >= 4003)
#  define ATTRIBUTE_RESULT_SIZE_1 __attribute__ ((alloc_size (1)))
# else
#  define ATTRIBUTE_RESULT_SIZE_1
#endif
#endif

#ifndef ATTRIBUTE_RESULT_SIZE_2
# if (GCC_VERSION >= 4003)
#  define ATTRIBUTE_RESULT_SIZE_2 __attribute__ ((alloc_size (2)))
# else
#  define ATTRIBUTE_RESULT_SIZE_2
#endif
#endif

#ifndef ATTRIBUTE_RESULT_SIZE_1_2
# if (GCC_VERSION >= 4003)
#  define ATTRIBUTE_RESULT_SIZE_1_2 __attribute__ ((alloc_size (1, 2)))
# else
#  define ATTRIBUTE_RESULT_SIZE_1_2
#endif
#endif

/* Attribute `warn_unused_result' was valid as of gcc 3.3.  */
#ifndef ATTRIBUTE_WARN_UNUSED_RESULT
# if GCC_VERSION >= 3003
#  define ATTRIBUTE_WARN_UNUSED_RESULT __attribute__ ((__warn_unused_result__))
# else
#  define ATTRIBUTE_WARN_UNUSED_RESULT
# endif
#endif

/* We use __extension__ in some places to suppress -pedantic warnings
   about GCC extensions.  This feature didn't work properly before
   gcc 2.8.  */
#if GCC_VERSION < 2008
#define __extension__
#endif

/* This is used to declare a const variable which should be visible
   outside of the current compilation unit.  Use it as
     EXPORTED_CONST int i = 1;
   This is because the semantics of const are different in C and C++.
   "extern const" is permitted in C but it looks strange, and gcc
   warns about it when -Wc++-compat is not used.  */
#ifdef __cplusplus
#define EXPORTED_CONST extern const
#else
#define EXPORTED_CONST const
#endif

/* Be conservative and only use enum bitfields with C++ or GCC.
   FIXME: provide a complete autoconf test for buggy enum bitfields.  */

#ifdef __cplusplus
#define ENUM_BITFIELD(TYPE) enum TYPE
#elif (GCC_VERSION > 2000)
#define ENUM_BITFIELD(TYPE) __extension__ enum TYPE
#else
#define ENUM_BITFIELD(TYPE) unsigned int
#endif

#if defined(__cplusplus) && __cpp_constexpr >= 200704
#define CONSTEXPR constexpr
#else
#define CONSTEXPR
#endif

/* A macro to disable the copy constructor and assignment operator.
   When building with C++11 and above, the methods are explicitly
   deleted, causing a compile-time error if something tries to copy.
   For C++03, this just declares the methods, causing a link-time
   error if the methods end up called (assuming you don't
   define them).  For C++03, for best results, place the macro
   under the private: access specifier, like this,

   class name_lookup
   {
     private:
       DISABLE_COPY_AND_ASSIGN (name_lookup);
   };

   so that most attempts at copy are caught at compile-time.  */

#if defined(__cplusplus) && __cplusplus >= 201103
#define DISABLE_COPY_AND_ASSIGN(TYPE)		\
  TYPE (const TYPE&) = delete;			\
  void operator= (const TYPE &) = delete
  #else
#define DISABLE_COPY_AND_ASSIGN(TYPE)		\
  TYPE (const TYPE&);				\
  void operator= (const TYPE &)
#endif /* __cplusplus >= 201103 */

#ifdef __cplusplus
}
#endif

#endif	/* ansidecl.h	*/
Commit	Line	Data
	1	/* Compiler compatibility macros
	2	Copyright (C) 1991-2024 Free Software Foundation, Inc.
	3	This file is part of the GNU C Library.
	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation; either version 2 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; if not, write to the Free Software
	17	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
	18
	19	/* For ease of writing code which uses GCC extensions but needs to be
	20	portable to other compilers, we provide the GCC_VERSION macro that
	21	simplifies testing __GNUC__ and __GNUC_MINOR__ together, and various
	22	wrappers around __attribute__. Also, __extension__ will be #defined
	23	to nothing if it doesn't work. See below. */
	24
	25	#ifndef _ANSIDECL_H
	26	#define _ANSIDECL_H 1
	27
	28	#ifdef __cplusplus
	29	extern "C" {
	30	#endif
	31
	32	/* Every source file includes this file,
	33	so they will all get the switch for lint. */
	34	/* LINTLIBRARY */
	35
	36	/* Using MACRO(x,y) in cpp #if conditionals does not work with some
	37	older preprocessors. Thus we can't define something like this:
	38
	39	#define HAVE_GCC_VERSION(MAJOR, MINOR) \
	40	(__GNUC__ > (MAJOR) \|\| (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR)))
	41
	42	and then test "#if HAVE_GCC_VERSION(2,7)".
	43
	44	So instead we use the macro below and test it against specific values. */
	45
	46	/* This macro simplifies testing whether we are using gcc, and if it
	47	is of a particular minimum version. (Both major & minor numbers are
	48	significant.) This macro will evaluate to 0 if we are not using
	49	gcc at all. */
	50	#ifndef GCC_VERSION
	51	#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
	52	#endif /* GCC_VERSION */
	53
	54	/* inline requires special treatment; it's in C99, and GCC >=2.7 supports
	55	it too, but it's not in C89. */
	56	#undef inline
	57	#if (!defined(__cplusplus) && __STDC_VERSION__ >= 199901L) \|\| defined(__cplusplus) \|\| (defined(__SUNPRO_C) && defined(__C99FEATURES__))
	58	/* it's a keyword */
	59	#else
	60	# if GCC_VERSION >= 2007
	61	# define inline __inline__ /* __inline__ prevents -pedantic warnings */
	62	# else
	63	# define inline /* nothing */
	64	# endif
	65	#endif
	66
	67	/* Define macros for some gcc attributes. This permits us to use the
	68	macros freely, and know that they will come into play for the
	69	version of gcc in which they are supported. */
	70
	71	#if (GCC_VERSION < 2007)
	72	# define __attribute__(x)
	73	#endif
	74
	75	/* Attribute __malloc__ on functions was valid as of gcc 2.96. */
	76	#ifndef ATTRIBUTE_MALLOC
	77	# if (GCC_VERSION >= 2096)
	78	# define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
	79	# else
	80	# define ATTRIBUTE_MALLOC
	81	# endif /* GNUC >= 2.96 */
	82	#endif /* ATTRIBUTE_MALLOC */
	83
	84	/* Attributes on labels were valid as of gcc 2.93 and g++ 4.5. For
	85	g++ an attribute on a label must be followed by a semicolon. */
	86	#ifndef ATTRIBUTE_UNUSED_LABEL
	87	# ifndef __cplusplus
	88	# if GCC_VERSION >= 2093
	89	# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
	90	# else
	91	# define ATTRIBUTE_UNUSED_LABEL
	92	# endif
	93	# else
	94	# if GCC_VERSION >= 4005
	95	# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED ;
	96	# else
	97	# define ATTRIBUTE_UNUSED_LABEL
	98	# endif
	99	# endif
	100	#endif
	101
	102	/* Similarly to ARG_UNUSED below. Prior to GCC 3.4, the C++ frontend
	103	couldn't parse attributes placed after the identifier name, and now
	104	the entire compiler is built with C++. */
	105	#ifndef ATTRIBUTE_UNUSED
	106	#if GCC_VERSION >= 3004
	107	# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
	108	#else
	109	#define ATTRIBUTE_UNUSED
	110	#endif
	111	#endif /* ATTRIBUTE_UNUSED */
	112
	113	/* Before GCC 3.4, the C++ frontend couldn't parse attributes placed after the
	114	identifier name. */
	115	#if ! defined(__cplusplus) \|\| (GCC_VERSION >= 3004)
	116	# define ARG_UNUSED(NAME) NAME ATTRIBUTE_UNUSED
	117	#else /* !__cplusplus \|\| GNUC >= 3.4 */
	118	# define ARG_UNUSED(NAME) NAME
	119	#endif /* !__cplusplus \|\| GNUC >= 3.4 */
	120
	121	#ifndef ATTRIBUTE_NORETURN
	122	#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
	123	#endif /* ATTRIBUTE_NORETURN */
	124
	125	/* Attribute `nonnull' was valid as of gcc 3.3. */
	126	#ifndef ATTRIBUTE_NONNULL
	127	# if (GCC_VERSION >= 3003)
	128	# define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m)))
	129	# else
	130	# define ATTRIBUTE_NONNULL(m)
	131	# endif /* GNUC >= 3.3 */
	132	#endif /* ATTRIBUTE_NONNULL */
	133
	134	/* Attribute `returns_nonnull' was valid as of gcc 4.9. */
	135	#ifndef ATTRIBUTE_RETURNS_NONNULL
	136	# if (GCC_VERSION >= 4009)
	137	# define ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
	138	# else
	139	# define ATTRIBUTE_RETURNS_NONNULL
	140	# endif /* GNUC >= 4.9 */
	141	#endif /* ATTRIBUTE_RETURNS_NONNULL */
	142
	143	/* Attribute `pure' was valid as of gcc 3.0. */
	144	#ifndef ATTRIBUTE_PURE
	145	# if (GCC_VERSION >= 3000)
	146	# define ATTRIBUTE_PURE __attribute__ ((__pure__))
	147	# else
	148	# define ATTRIBUTE_PURE
	149	# endif /* GNUC >= 3.0 */
	150	#endif /* ATTRIBUTE_PURE */
	151
	152	/* Use ATTRIBUTE_PRINTF when the format specifier must not be NULL.
	153	This was the case for the `printf' format attribute by itself
	154	before GCC 3.3, but as of 3.3 we need to add the `nonnull'
	155	attribute to retain this behavior. */
	156	#ifndef ATTRIBUTE_PRINTF
	157	#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) ATTRIBUTE_NONNULL(m)
	158	#define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2)
	159	#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
	160	#define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4)
	161	#define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5)
	162	#define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6)
	163	#endif /* ATTRIBUTE_PRINTF */
	164
	165	/* Use ATTRIBUTE_FPTR_PRINTF when the format attribute is to be set on
	166	a function pointer. Format attributes were allowed on function
	167	pointers as of gcc 3.1. */
	168	#ifndef ATTRIBUTE_FPTR_PRINTF
	169	# if (GCC_VERSION >= 3001)
	170	# define ATTRIBUTE_FPTR_PRINTF(m, n) ATTRIBUTE_PRINTF(m, n)
	171	# else
	172	# define ATTRIBUTE_FPTR_PRINTF(m, n)
	173	# endif /* GNUC >= 3.1 */
	174	# define ATTRIBUTE_FPTR_PRINTF_1 ATTRIBUTE_FPTR_PRINTF(1, 2)
	175	# define ATTRIBUTE_FPTR_PRINTF_2 ATTRIBUTE_FPTR_PRINTF(2, 3)
	176	# define ATTRIBUTE_FPTR_PRINTF_3 ATTRIBUTE_FPTR_PRINTF(3, 4)
	177	# define ATTRIBUTE_FPTR_PRINTF_4 ATTRIBUTE_FPTR_PRINTF(4, 5)
	178	# define ATTRIBUTE_FPTR_PRINTF_5 ATTRIBUTE_FPTR_PRINTF(5, 6)
	179	#endif /* ATTRIBUTE_FPTR_PRINTF */
	180
	181	/* Use ATTRIBUTE_NULL_PRINTF when the format specifier may be NULL. A
	182	NULL format specifier was allowed as of gcc 3.3. */
	183	#ifndef ATTRIBUTE_NULL_PRINTF
	184	# if (GCC_VERSION >= 3003)
	185	# define ATTRIBUTE_NULL_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
	186	# else
	187	# define ATTRIBUTE_NULL_PRINTF(m, n)
	188	# endif /* GNUC >= 3.3 */
	189	# define ATTRIBUTE_NULL_PRINTF_1 ATTRIBUTE_NULL_PRINTF(1, 2)
	190	# define ATTRIBUTE_NULL_PRINTF_2 ATTRIBUTE_NULL_PRINTF(2, 3)
	191	# define ATTRIBUTE_NULL_PRINTF_3 ATTRIBUTE_NULL_PRINTF(3, 4)
	192	# define ATTRIBUTE_NULL_PRINTF_4 ATTRIBUTE_NULL_PRINTF(4, 5)
	193	# define ATTRIBUTE_NULL_PRINTF_5 ATTRIBUTE_NULL_PRINTF(5, 6)
	194	#endif /* ATTRIBUTE_NULL_PRINTF */
	195
	196	/* Attribute `sentinel' was valid as of gcc 3.5. */
	197	#ifndef ATTRIBUTE_SENTINEL
	198	# if (GCC_VERSION >= 3005)
	199	# define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__))
	200	# else
	201	# define ATTRIBUTE_SENTINEL
	202	# endif /* GNUC >= 3.5 */
	203	#endif /* ATTRIBUTE_SENTINEL */
	204
	205
	206	#ifndef ATTRIBUTE_ALIGNED_ALIGNOF
	207	# if (GCC_VERSION >= 3000)
	208	# define ATTRIBUTE_ALIGNED_ALIGNOF(m) __attribute__ ((__aligned__ (__alignof__ (m))))
	209	# else
	210	# define ATTRIBUTE_ALIGNED_ALIGNOF(m)
	211	# endif /* GNUC >= 3.0 */
	212	#endif /* ATTRIBUTE_ALIGNED_ALIGNOF */
	213
	214	/* Useful for structures whose layout must match some binary specification
	215	regardless of the alignment and padding qualities of the compiler. */
	216	#ifndef ATTRIBUTE_PACKED
	217	# define ATTRIBUTE_PACKED __attribute__ ((packed))
	218	#endif
	219
	220	/* Attribute `hot' and `cold' was valid as of gcc 4.3. */
	221	#ifndef ATTRIBUTE_COLD
	222	# if (GCC_VERSION >= 4003)
	223	# define ATTRIBUTE_COLD __attribute__ ((__cold__))
	224	# else
	225	# define ATTRIBUTE_COLD
	226	# endif /* GNUC >= 4.3 */
	227	#endif /* ATTRIBUTE_COLD */
	228	#ifndef ATTRIBUTE_HOT
	229	# if (GCC_VERSION >= 4003)
	230	# define ATTRIBUTE_HOT __attribute__ ((__hot__))
	231	# else
	232	# define ATTRIBUTE_HOT
	233	# endif /* GNUC >= 4.3 */
	234	#endif /* ATTRIBUTE_HOT */
	235
	236	/* Attribute 'no_sanitize_undefined' was valid as of gcc 4.9. */
	237	#ifndef ATTRIBUTE_NO_SANITIZE_UNDEFINED
	238	# if (GCC_VERSION >= 4009)
	239	# define ATTRIBUTE_NO_SANITIZE_UNDEFINED __attribute__ ((no_sanitize_undefined))
	240	# else
	241	# define ATTRIBUTE_NO_SANITIZE_UNDEFINED
	242	# endif /* GNUC >= 4.9 */
	243	#endif /* ATTRIBUTE_NO_SANITIZE_UNDEFINED */
	244
	245	/* Attribute 'nonstring' was valid as of gcc 8. */
	246	#ifndef ATTRIBUTE_NONSTRING
	247	# if GCC_VERSION >= 8000
	248	# define ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
	249	# else
	250	# define ATTRIBUTE_NONSTRING
	251	# endif
	252	#endif
	253
	254	/* Attribute `alloc_size' was valid as of gcc 4.3. */
	255	#ifndef ATTRIBUTE_RESULT_SIZE_1
	256	# if (GCC_VERSION >= 4003)
	257	# define ATTRIBUTE_RESULT_SIZE_1 __attribute__ ((alloc_size (1)))
	258	# else
	259	# define ATTRIBUTE_RESULT_SIZE_1
	260	#endif
	261	#endif
	262
	263	#ifndef ATTRIBUTE_RESULT_SIZE_2
	264	# if (GCC_VERSION >= 4003)
	265	# define ATTRIBUTE_RESULT_SIZE_2 __attribute__ ((alloc_size (2)))
	266	# else
	267	# define ATTRIBUTE_RESULT_SIZE_2
	268	#endif
	269	#endif
	270
	271	#ifndef ATTRIBUTE_RESULT_SIZE_1_2
	272	# if (GCC_VERSION >= 4003)
	273	# define ATTRIBUTE_RESULT_SIZE_1_2 __attribute__ ((alloc_size (1, 2)))
	274	# else
	275	# define ATTRIBUTE_RESULT_SIZE_1_2
	276	#endif
	277	#endif
	278
	279	/* Attribute `warn_unused_result' was valid as of gcc 3.3. */
	280	#ifndef ATTRIBUTE_WARN_UNUSED_RESULT
	281	# if GCC_VERSION >= 3003
	282	# define ATTRIBUTE_WARN_UNUSED_RESULT __attribute__ ((__warn_unused_result__))
	283	# else
	284	# define ATTRIBUTE_WARN_UNUSED_RESULT
	285	# endif
	286	#endif
	287
	288	/* We use __extension__ in some places to suppress -pedantic warnings
	289	about GCC extensions. This feature didn't work properly before
	290	gcc 2.8. */
	291	#if GCC_VERSION < 2008
	292	#define __extension__
	293	#endif
	294
	295	/* This is used to declare a const variable which should be visible
	296	outside of the current compilation unit. Use it as
	297	EXPORTED_CONST int i = 1;
	298	This is because the semantics of const are different in C and C++.
	299	"extern const" is permitted in C but it looks strange, and gcc
	300	warns about it when -Wc++-compat is not used. */
	301	#ifdef __cplusplus
	302	#define EXPORTED_CONST extern const
	303	#else
	304	#define EXPORTED_CONST const
	305	#endif
	306
	307	/* Be conservative and only use enum bitfields with C++ or GCC.
	308	FIXME: provide a complete autoconf test for buggy enum bitfields. */
	309
	310	#ifdef __cplusplus
	311	#define ENUM_BITFIELD(TYPE) enum TYPE
	312	#elif (GCC_VERSION > 2000)
	313	#define ENUM_BITFIELD(TYPE) __extension__ enum TYPE
	314	#else
	315	#define ENUM_BITFIELD(TYPE) unsigned int
	316	#endif
	317
	318	#if defined(__cplusplus) && __cpp_constexpr >= 200704
	319	#define CONSTEXPR constexpr
	320	#else
	321	#define CONSTEXPR
	322	#endif
	323
	324	/* A macro to disable the copy constructor and assignment operator.
	325	When building with C++11 and above, the methods are explicitly
	326	deleted, causing a compile-time error if something tries to copy.
	327	For C++03, this just declares the methods, causing a link-time
	328	error if the methods end up called (assuming you don't
	329	define them). For C++03, for best results, place the macro
	330	under the private: access specifier, like this,
	331
	332	class name_lookup
	333	{
	334	private:
	335	DISABLE_COPY_AND_ASSIGN (name_lookup);
	336	};
	337
	338	so that most attempts at copy are caught at compile-time. */
	339
	340	#if defined(__cplusplus) && __cplusplus >= 201103
	341	#define DISABLE_COPY_AND_ASSIGN(TYPE) \
	342	TYPE (const TYPE&) = delete; \
	343	void operator= (const TYPE &) = delete
	344	#else
	345	#define DISABLE_COPY_AND_ASSIGN(TYPE) \
	346	TYPE (const TYPE&); \
	347	void operator= (const TYPE &)
	348	#endif /* __cplusplus >= 201103 */
	349
	350	#ifdef __cplusplus
	351	}
	352	#endif
	353
	354	#endif /* ansidecl.h */