[deliverable/binutils-gdb.git] / include / ansidecl.h

/* ANSI and traditional C compatability macros
   Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* ANSI and traditional C compatibility macros

   ANSI C is assumed if __STDC__ is #defined.

   Macro		ANSI C definition	Traditional C definition
   -----		---- - ----------	----------- - ----------
   ANSI_PROTOTYPES	1			not defined
   PTR			`void *'		`char *'
   PTRCONST		`void *const'		`char *'
   LONG_DOUBLE		`long double'		`double'
   const		not defined		`'
   volatile		not defined		`'
   signed		not defined		`'
   VA_START(ap, var)	va_start(ap, var)	va_start(ap)

   Note that it is safe to write "void foo();" indicating a function
   with no return value, in all K+R compilers we have been able to test.

   For declaring functions with prototypes, we also provide these:

   PARAMS ((prototype))
   -- for functions which take a fixed number of arguments.  Use this
   when declaring the function.  When defining the function, write a
   K+R style argument list.  For example:

	char *strcpy PARAMS ((char *dest, char *source));
	...
	char *
	strcpy (dest, source)
	     char *dest;
	     char *source;
	{ ... }


   VPARAMS ((prototype, ...))
   -- for functions which take a variable number of arguments.  Use
   PARAMS to declare the function, VPARAMS to define it.  For example:

	int printf PARAMS ((const char *format, ...));
	...
	int
	printf VPARAMS ((const char *format, ...))
	{
	   ...
	}

   For writing functions which take variable numbers of arguments, we
   also provide the VA_OPEN, VA_CLOSE, and VA_FIXEDARG macros.  These
   hide the differences between K+R <varargs.h> and C89 <stdarg.h> more
   thoroughly than the simple VA_START() macro mentioned above.

   VA_OPEN and VA_CLOSE are used *instead of* va_start and va_end.
   Immediately after VA_OPEN, put a sequence of VA_FIXEDARG calls
   corresponding to the list of fixed arguments.  Then use va_arg
   normally to get the variable arguments, or pass your va_list object
   around.  You do not declare the va_list yourself; VA_OPEN does it
   for you.

   Here is a complete example:

	int
	printf VPARAMS ((const char *format, ...))
	{
	   int result;

	   VA_OPEN (ap, format);
	   VA_FIXEDARG (ap, const char *, format);

	   result = vfprintf (stdout, format, ap);
	   VA_CLOSE (ap);

	   return result;
	}


   You can declare variables either before or after the VA_OPEN,
   VA_FIXEDARG sequence.  Also, VA_OPEN and VA_CLOSE are the beginning
   and end of a block.  They must appear at the same nesting level,
   and any variables declared after VA_OPEN go out of scope at
   VA_CLOSE.  Unfortunately, with a K+R compiler, that includes the
   argument list.  You can have multiple instances of VA_OPEN/VA_CLOSE
   pairs in a single function in case you need to traverse the
   argument list more than once.

   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.

   This header also defines a lot of obsolete macros:
   CONST, VOLATILE, SIGNED, PROTO, EXFUN, DEFUN, DEFUN_VOID,
   AND, DOTS, NOARGS.  Don't use them.  */

#ifndef	_ANSIDECL_H
#define _ANSIDECL_H	1

/* 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 */

#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(_WIN32) || (defined(__alpha) && defined(__cplusplus))
/* All known AIX compilers implement these things (but don't always
   define __STDC__).  The RISC/OS MIPS compiler defines these things
   in SVR4 mode, but does not define __STDC__.  */
/* eraxxon@alumni.rice.edu: The Compaq C++ compiler, unlike many other
   C++ compilers, does not define __STDC__, though it acts as if this
   was so. (Verified versions: 5.7, 6.2, 6.3, 6.5) */

#define ANSI_PROTOTYPES	1
#define PTR		void *
#define PTRCONST	void *const
#define LONG_DOUBLE	long double

/* PARAMS is often defined elsewhere (e.g. by libintl.h), so wrap it in
   a #ifndef.  */
#ifndef PARAMS
#define PARAMS(ARGS)		ARGS
#endif

#define VPARAMS(ARGS)		ARGS
#define VA_START(VA_LIST, VAR)	va_start(VA_LIST, VAR)

/* variadic function helper macros */
/* "struct Qdmy" swallows the semicolon after VA_OPEN/VA_FIXEDARG's
   use without inhibiting further decls and without declaring an
   actual variable.  */
#define VA_OPEN(AP, VAR)	{ va_list AP; va_start(AP, VAR); { struct Qdmy
#define VA_CLOSE(AP)		} va_end(AP); }
#define VA_FIXEDARG(AP, T, N)	struct Qdmy
 
#undef const
#undef volatile
#undef signed

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

/* These are obsolete.  Do not use.  */
#ifndef IN_GCC
#define CONST		const
#define VOLATILE	volatile
#define SIGNED		signed

#define PROTO(type, name, arglist)	type name arglist
#define EXFUN(name, proto)		name proto
#define DEFUN(name, arglist, args)	name(args)
#define DEFUN_VOID(name)		name(void)
#define AND		,
#define DOTS		, ...
#define NOARGS		void
#endif /* ! IN_GCC */

#else	/* Not ANSI C.  */

#undef  ANSI_PROTOTYPES
#define PTR		char *
#define PTRCONST	PTR
#define LONG_DOUBLE	double

#define PARAMS(args)		()
#define VPARAMS(args)		(va_alist) va_dcl
#define VA_START(va_list, var)	va_start(va_list)

#define VA_OPEN(AP, VAR)		{ va_list AP; va_start(AP); { struct Qdmy
#define VA_CLOSE(AP)			} va_end(AP); }
#define VA_FIXEDARG(AP, TYPE, NAME)	TYPE NAME = va_arg(AP, TYPE)

/* some systems define these in header files for non-ansi mode */
#undef const
#undef volatile
#undef signed
#undef inline
#define const
#define volatile
#define signed
#define inline

#ifndef IN_GCC
#define CONST
#define VOLATILE
#define SIGNED

#define PROTO(type, name, arglist)	type name ()
#define EXFUN(name, proto)		name()
#define DEFUN(name, arglist, args)	name arglist args;
#define DEFUN_VOID(name)		name()
#define AND		;
#define DOTS
#define NOARGS
#endif /* ! IN_GCC */

#endif	/* ANSI C.  */

/* 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. */
#ifndef ATTRIBUTE_UNUSED_LABEL
# if (GCC_VERSION >= 2093)
#  define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
# else
#  define ATTRIBUTE_UNUSED_LABEL
# endif /* GNUC >= 2.93 */
#endif /* ATTRIBUTE_UNUSED_LABEL */

#ifndef ATTRIBUTE_UNUSED
#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#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 `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_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 */

/* 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

#endif	/* ansidecl.h	*/
Commit	Line	Data
252b5132	1	/* ANSI and traditional C compatability macros
562c4c36	2	Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001
4f1d9bd8	3	Free Software Foundation, Inc.
252b5132 RH	4	This file is part of the GNU C Library.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	19
	20	/* ANSI and traditional C compatibility macros
	21
	22	ANSI C is assumed if __STDC__ is #defined.
	23
562c4c36 DD	24	Macro ANSI C definition Traditional C definition
	25	----- ---- - ---------- ----------- - ----------
	26	ANSI_PROTOTYPES 1 not defined
	27	PTR `void ' `char '
	28	PTRCONST `void const' `char '
	29	LONG_DOUBLE `long double' `double'
	30	const not defined `'
	31	volatile not defined `'
	32	signed not defined `'
	33	VA_START(ap, var) va_start(ap, var) va_start(ap)
	34
	35	Note that it is safe to write "void foo();" indicating a function
	36	with no return value, in all K+R compilers we have been able to test.
	37
	38	For declaring functions with prototypes, we also provide these:
	39
	40	PARAMS ((prototype))
	41	-- for functions which take a fixed number of arguments. Use this
	42	when declaring the function. When defining the function, write a
	43	K+R style argument list. For example:
	44
	45	char strcpy PARAMS ((char dest, char *source));
	46	...
	47	char *
	48	strcpy (dest, source)
	49	char *dest;
	50	char *source;
	51	{ ... }
	52
	53
	54	VPARAMS ((prototype, ...))
	55	-- for functions which take a variable number of arguments. Use
	56	PARAMS to declare the function, VPARAMS to define it. For example:
	57
	58	int printf PARAMS ((const char *format, ...));
	59	...
	60	int
	61	printf VPARAMS ((const char *format, ...))
	62	{
	63	...
	64	}
	65
	66	For writing functions which take variable numbers of arguments, we
	67	also provide the VA_OPEN, VA_CLOSE, and VA_FIXEDARG macros. These
	68	hide the differences between K+R <varargs.h> and C89 <stdarg.h> more
	69	thoroughly than the simple VA_START() macro mentioned above.
	70
	71	VA_OPEN and VA_CLOSE are used instead of va_start and va_end.
	72	Immediately after VA_OPEN, put a sequence of VA_FIXEDARG calls
	73	corresponding to the list of fixed arguments. Then use va_arg
	74	normally to get the variable arguments, or pass your va_list object
	75	around. You do not declare the va_list yourself; VA_OPEN does it
	76	for you.
	77
	78	Here is a complete example:
	79
	80	int
	81	printf VPARAMS ((const char *format, ...))
	82	{
	83	int result;
	84
	85	VA_OPEN (ap, format);
	86	VA_FIXEDARG (ap, const char *, format);
	87
88	result = vfprintf (stdout, format, ap);
89	VA_CLOSE (ap);
90
91	return result;
92	}
93
94
95	You can declare variables either before or after the VA_OPEN,
f2e55dc2 DD	96	VA_FIXEDARG sequence. Also, VA_OPEN and VA_CLOSE are the beginning
	97	and end of a block. They must appear at the same nesting level,
	98	and any variables declared after VA_OPEN go out of scope at
	99	VA_CLOSE. Unfortunately, with a K+R compiler, that includes the
	100	argument list. You can have multiple instances of VA_OPEN/VA_CLOSE
	101	pairs in a single function in case you need to traverse the
	102	argument list more than once.
562c4c36 DD	103
	104	For ease of writing code which uses GCC extensions but needs to be
	105	portable to other compilers, we provide the GCC_VERSION macro that
	106	simplifies testing __GNUC__ and __GNUC_MINOR__ together, and various
	107	wrappers around __attribute__. Also, __extension__ will be #defined
	108	to nothing if it doesn't work. See below.
	109
	110	This header also defines a lot of obsolete macros:
	111	CONST, VOLATILE, SIGNED, PROTO, EXFUN, DEFUN, DEFUN_VOID,
	112	AND, DOTS, NOARGS. Don't use them. */
252b5132 RH	113
252b5132 RH	114	#ifndef _ANSIDECL_H
562c4c36	115	#define _ANSIDECL_H 1
252b5132 RH	116
	117	/* Every source file includes this file,
	118	so they will all get the switch for lint. */
	119	/* LINTLIBRARY */
	120
562c4c36 DD	121	/* Using MACRO(x,y) in cpp #if conditionals does not work with some
	122	older preprocessors. Thus we can't define something like this:
	123
	124	#define HAVE_GCC_VERSION(MAJOR, MINOR) \
	125	(__GNUC__ > (MAJOR) \|\| (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR)))
	126
	127	and then test "#if HAVE_GCC_VERSION(2,7)".
	128
	129	So instead we use the macro below and test it against specific values. */
	130
	131	/* This macro simplifies testing whether we are using gcc, and if it
	132	is of a particular minimum version. (Both major & minor numbers are
	133	significant.) This macro will evaluate to 0 if we are not using
	134	gcc at all. */
	135	#ifndef GCC_VERSION
	136	#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
	137	#endif /* GCC_VERSION */
252b5132	138
995a8435	139	#if defined (__STDC__) \|\| defined (_AIX) \|\| (defined (__mips) && defined (_SYSTYPE_SVR4)) \|\| defined(_WIN32) \|\| (defined(__alpha) && defined(__cplusplus))
252b5132 RH	140	/* All known AIX compilers implement these things (but don't always
	141	define __STDC__). The RISC/OS MIPS compiler defines these things
	142	in SVR4 mode, but does not define __STDC__. */
995a8435 DD	143	/* eraxxon@alumni.rice.edu: The Compaq C++ compiler, unlike many other
	144	C++ compilers, does not define __STDC__, though it acts as if this
	145	was so. (Verified versions: 5.7, 6.2, 6.3, 6.5) */
252b5132	146
562c4c36 DD	147	#define ANSI_PROTOTYPES 1
	148	#define PTR void *
	149	#define PTRCONST void *const
	150	#define LONG_DOUBLE long double
	151
8adce22d DD	152	/* PARAMS is often defined elsewhere (e.g. by libintl.h), so wrap it in
	153	a #ifndef. */
	154	#ifndef PARAMS
562c4c36	155	#define PARAMS(ARGS) ARGS
8adce22d DD	156	#endif
8adce22d DD	157
562c4c36 DD	158	#define VPARAMS(ARGS) ARGS
	159	#define VA_START(VA_LIST, VAR) va_start(VA_LIST, VAR)
	160
	161	/* variadic function helper macros */
	162	/* "struct Qdmy" swallows the semicolon after VA_OPEN/VA_FIXEDARG's
	163	use without inhibiting further decls and without declaring an
	164	actual variable. */
8a423cb3 DD	165	#define VA_OPEN(AP, VAR) { va_list AP; va_start(AP, VAR); { struct Qdmy
8a423cb3 DD	166	#define VA_CLOSE(AP) } va_end(AP); }
562c4c36 DD	167	#define VA_FIXEDARG(AP, T, N) struct Qdmy
	168
	169	#undef const
	170	#undef volatile
	171	#undef signed
	172
	173	/* inline requires special treatment; it's in C99, and GCC >=2.7 supports
	174	it too, but it's not in C89. */
	175	#undef inline
	176	#if __STDC_VERSION__ > 199901L
	177	/* it's a keyword */
	178	#else
	179	# if GCC_VERSION >= 2007
	180	# define inline __inline__ /* __inline__ prevents -pedantic warnings */
	181	# else
	182	# define inline /* nothing */
	183	# endif
	184	#endif
252b5132 RH	185
	186	/* These are obsolete. Do not use. */
	187	#ifndef IN_GCC
562c4c36 DD	188	#define CONST const
	189	#define VOLATILE volatile
	190	#define SIGNED signed
	191
252b5132 RH	192	#define PROTO(type, name, arglist) type name arglist
	193	#define EXFUN(name, proto) name proto
	194	#define DEFUN(name, arglist, args) name(args)
	195	#define DEFUN_VOID(name) name(void)
562c4c36 DD	196	#define AND ,
	197	#define DOTS , ...
	198	#define NOARGS void
252b5132 RH	199	#endif /* ! IN_GCC */
	200
	201	#else /* Not ANSI C. */
	202
562c4c36 DD	203	#undef ANSI_PROTOTYPES
	204	#define PTR char *
	205	#define PTRCONST PTR
	206	#define LONG_DOUBLE double
	207
	208	#define PARAMS(args) ()
	209	#define VPARAMS(args) (va_alist) va_dcl
	210	#define VA_START(va_list, var) va_start(va_list)
	211
8a423cb3 DD	212	#define VA_OPEN(AP, VAR) { va_list AP; va_start(AP); { struct Qdmy
8a423cb3 DD	213	#define VA_CLOSE(AP) } va_end(AP); }
562c4c36 DD	214	#define VA_FIXEDARG(AP, TYPE, NAME) TYPE NAME = va_arg(AP, TYPE)
	215
	216	/* some systems define these in header files for non-ansi mode */
	217	#undef const
	218	#undef volatile
	219	#undef signed
	220	#undef inline
	221	#define const
	222	#define volatile
	223	#define signed
	224	#define inline
252b5132	225
252b5132 RH	226	#ifndef IN_GCC
252b5132 RH	227	#define CONST
562c4c36 DD	228	#define VOLATILE
	229	#define SIGNED
	230
252b5132 RH	231	#define PROTO(type, name, arglist) type name ()
	232	#define EXFUN(name, proto) name()
	233	#define DEFUN(name, arglist, args) name arglist args;
	234	#define DEFUN_VOID(name) name()
562c4c36 DD	235	#define AND ;
	236	#define DOTS
	237	#define NOARGS
252b5132 RH	238	#endif /* ! IN_GCC */
	239
	240	#endif /* ANSI C. */
	241
893e9593 ILT	242	/* Define macros for some gcc attributes. This permits us to use the
	243	macros freely, and know that they will come into play for the
	244	version of gcc in which they are supported. */
	245
4597ba0f	246	#if (GCC_VERSION < 2007)
893e9593 ILT	247	# define __attribute__(x)
	248	#endif
	249
4597ba0f ILT	250	/* Attribute __malloc__ on functions was valid as of gcc 2.96. */
	251	#ifndef ATTRIBUTE_MALLOC
	252	# if (GCC_VERSION >= 2096)
	253	# define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
893e9593	254	# else
4597ba0f ILT	255	# define ATTRIBUTE_MALLOC
	256	# endif /* GNUC >= 2.96 */
	257	#endif /* ATTRIBUTE_MALLOC */
	258
	259	/* Attributes on labels were valid as of gcc 2.93. */
	260	#ifndef ATTRIBUTE_UNUSED_LABEL
	261	# if (GCC_VERSION >= 2093)
893e9593	262	# define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
4597ba0f ILT	263	# else
	264	# define ATTRIBUTE_UNUSED_LABEL
	265	# endif /* GNUC >= 2.93 */
893e9593 ILT	266	#endif /* ATTRIBUTE_UNUSED_LABEL */
	267
	268	#ifndef ATTRIBUTE_UNUSED
	269	#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
	270	#endif /* ATTRIBUTE_UNUSED */
	271
d5b4094f DD	272	/* Before GCC 3.4, the C++ frontend couldn't parse attributes placed after the
	273	identifier name. */
	274	#if ! defined(__cplusplus) \|\| (GCC_VERSION >= 3004)
	275	# define ARG_UNUSED(NAME) NAME ATTRIBUTE_UNUSED
	276	#else /* !__cplusplus \|\| GNUC >= 3.4 */
	277	# define ARG_UNUSED(NAME) NAME
	278	#endif /* !__cplusplus \|\| GNUC >= 3.4 */
	279
893e9593 ILT	280	#ifndef ATTRIBUTE_NORETURN
	281	#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
	282	#endif /* ATTRIBUTE_NORETURN */
	283
bf8db3d4 DD	284	/* Attribute `nonnull' was valid as of gcc 3.3. */
	285	#ifndef ATTRIBUTE_NONNULL
	286	# if (GCC_VERSION >= 3003)
	287	# define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m)))
	288	# else
	289	# define ATTRIBUTE_NONNULL(m)
	290	# endif /* GNUC >= 3.3 */
	291	#endif /* ATTRIBUTE_NONNULL */
	292
a35b6b04 DD	293	/* Attribute `pure' was valid as of gcc 3.0. */
	294	#ifndef ATTRIBUTE_PURE
	295	# if (GCC_VERSION >= 3000)
	296	# define ATTRIBUTE_PURE __attribute__ ((__pure__))
	297	# else
	298	# define ATTRIBUTE_PURE
	299	# endif /* GNUC >= 3.0 */
	300	#endif /* ATTRIBUTE_PURE */
	301
bf8db3d4 DD	302	/* Use ATTRIBUTE_PRINTF when the format specifier must not be NULL.
	303	This was the case for the `printf' format attribute by itself
	304	before GCC 3.3, but as of 3.3 we need to add the `nonnull'
	305	attribute to retain this behavior. */
893e9593	306	#ifndef ATTRIBUTE_PRINTF
bf8db3d4	307	#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) ATTRIBUTE_NONNULL(m)
893e9593 ILT	308	#define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2)
	309	#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
	310	#define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4)
	311	#define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5)
	312	#define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6)
	313	#endif /* ATTRIBUTE_PRINTF */
	314
bf8db3d4 DD	315	/* Use ATTRIBUTE_NULL_PRINTF when the format specifier may be NULL. A
	316	NULL format specifier was allowed as of gcc 3.3. */
	317	#ifndef ATTRIBUTE_NULL_PRINTF
	318	# if (GCC_VERSION >= 3003)
	319	# define ATTRIBUTE_NULL_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
	320	# else
	321	# define ATTRIBUTE_NULL_PRINTF(m, n)
	322	# endif /* GNUC >= 3.3 */
	323	# define ATTRIBUTE_NULL_PRINTF_1 ATTRIBUTE_NULL_PRINTF(1, 2)
	324	# define ATTRIBUTE_NULL_PRINTF_2 ATTRIBUTE_NULL_PRINTF(2, 3)
	325	# define ATTRIBUTE_NULL_PRINTF_3 ATTRIBUTE_NULL_PRINTF(3, 4)
	326	# define ATTRIBUTE_NULL_PRINTF_4 ATTRIBUTE_NULL_PRINTF(4, 5)
	327	# define ATTRIBUTE_NULL_PRINTF_5 ATTRIBUTE_NULL_PRINTF(5, 6)
	328	#endif /* ATTRIBUTE_NULL_PRINTF */
	329
a5ecc6a5 DD	330	/* Attribute `sentinel' was valid as of gcc 3.5. */
	331	#ifndef ATTRIBUTE_SENTINEL
	332	# if (GCC_VERSION >= 3005)
	333	# define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__))
	334	# else
	335	# define ATTRIBUTE_SENTINEL
	336	# endif /* GNUC >= 3.5 */
	337	#endif /* ATTRIBUTE_SENTINEL */
	338
f1d95f4b L	339	/* We use __extension__ in some places to suppress -pedantic warnings
	340	about GCC extensions. This feature didn't work properly before
	341	gcc 2.8. */
	342	#if GCC_VERSION < 2008
	343	#define __extension__
	344	#endif
	345
252b5132	346	#endif /* ansidecl.h */