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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [include/] [ansidecl.h] - Blame information for rev 298

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/* ANSI and traditional C compatability macros
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   Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001
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   Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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11
This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
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/* ANSI and traditional C compatibility macros
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   ANSI C is assumed if __STDC__ is #defined.
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24
   Macro                ANSI C definition       Traditional C definition
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   -----                ---- - ----------       ----------- - ----------
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   ANSI_PROTOTYPES      1                       not defined
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   PTR                  `void *'                `char *'
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   PTRCONST             `void *const'           `char *'
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   LONG_DOUBLE          `long double'           `double'
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   const                not defined             `'
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   volatile             not defined             `'
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   signed               not defined             `'
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   VA_START(ap, var)    va_start(ap, var)       va_start(ap)
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35
   Note that it is safe to write "void foo();" indicating a function
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   with no return value, in all K+R compilers we have been able to test.
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   For declaring functions with prototypes, we also provide these:
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   PARAMS ((prototype))
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   -- for functions which take a fixed number of arguments.  Use this
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   when declaring the function.  When defining the function, write a
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   K+R style argument list.  For example:
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        char *strcpy PARAMS ((char *dest, char *source));
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        ...
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        char *
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        strcpy (dest, source)
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             char *dest;
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             char *source;
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        { ... }
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   VPARAMS ((prototype, ...))
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   -- for functions which take a variable number of arguments.  Use
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   PARAMS to declare the function, VPARAMS to define it.  For example:
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        int printf PARAMS ((const char *format, ...));
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        ...
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        int
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        printf VPARAMS ((const char *format, ...))
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        {
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           ...
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        }
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   For writing functions which take variable numbers of arguments, we
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   also provide the VA_OPEN, VA_CLOSE, and VA_FIXEDARG macros.  These
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   hide the differences between K+R <varargs.h> and C89 <stdarg.h> more
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   thoroughly than the simple VA_START() macro mentioned above.
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   VA_OPEN and VA_CLOSE are used *instead of* va_start and va_end.
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   Immediately after VA_OPEN, put a sequence of VA_FIXEDARG calls
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   corresponding to the list of fixed arguments.  Then use va_arg
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   normally to get the variable arguments, or pass your va_list object
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   around.  You do not declare the va_list yourself; VA_OPEN does it
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   for you.
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   Here is a complete example:
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        int
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        printf VPARAMS ((const char *format, ...))
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        {
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           int result;
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           VA_OPEN (ap, format);
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           VA_FIXEDARG (ap, const char *, format);
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           result = vfprintf (stdout, format, ap);
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           VA_CLOSE (ap);
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           return result;
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        }
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   You can declare variables either before or after the VA_OPEN,
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   VA_FIXEDARG sequence.  Also, VA_OPEN and VA_CLOSE are the beginning
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   and end of a block.  They must appear at the same nesting level,
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   and any variables declared after VA_OPEN go out of scope at
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   VA_CLOSE.  Unfortunately, with a K+R compiler, that includes the
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   argument list.  You can have multiple instances of VA_OPEN/VA_CLOSE
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   pairs in a single function in case you need to traverse the
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   argument list more than once.
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104
   For ease of writing code which uses GCC extensions but needs to be
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   portable to other compilers, we provide the GCC_VERSION macro that
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   simplifies testing __GNUC__ and __GNUC_MINOR__ together, and various
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   wrappers around __attribute__.  Also, __extension__ will be #defined
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   to nothing if it doesn't work.  See below.
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110
   This header also defines a lot of obsolete macros:
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   CONST, VOLATILE, SIGNED, PROTO, EXFUN, DEFUN, DEFUN_VOID,
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   AND, DOTS, NOARGS.  Don't use them.  */
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#ifndef _ANSIDECL_H
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#define _ANSIDECL_H     1
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/* Every source file includes this file,
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   so they will all get the switch for lint.  */
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/* LINTLIBRARY */
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121
/* Using MACRO(x,y) in cpp #if conditionals does not work with some
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   older preprocessors.  Thus we can't define something like this:
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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)".
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129
So instead we use the macro below and test it against specific values.  */
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/* This macro simplifies testing whether we are using gcc, and if it
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   is of a particular minimum version. (Both major & minor numbers are
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   significant.)  This macro will evaluate to 0 if we are not using
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   gcc at all.  */
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#ifndef GCC_VERSION
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#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
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#endif /* GCC_VERSION */
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139
#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(_WIN32) || (defined(__alpha) && defined(__cplusplus))
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/* All known AIX compilers implement these things (but don't always
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   define __STDC__).  The RISC/OS MIPS compiler defines these things
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   in SVR4 mode, but does not define __STDC__.  */
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/* eraxxon@alumni.rice.edu: The Compaq C++ compiler, unlike many other
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   C++ compilers, does not define __STDC__, though it acts as if this
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   was so. (Verified versions: 5.7, 6.2, 6.3, 6.5) */
146
 
147
#define ANSI_PROTOTYPES 1
148
#define PTR             void *
149
#define PTRCONST        void *const
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#define LONG_DOUBLE     long double
151
 
152
/* PARAMS is often defined elsewhere (e.g. by libintl.h), so wrap it in
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   a #ifndef.  */
154
#ifndef PARAMS
155
#define PARAMS(ARGS)            ARGS
156
#endif
157
 
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
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   use without inhibiting further decls and without declaring an
164
   actual variable.  */
165
#define VA_OPEN(AP, VAR)        { va_list AP; va_start(AP, VAR); { struct Qdmy
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#define VA_CLOSE(AP)            } va_end(AP); }
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
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   it too, but it's not in C89.  */
175
#undef inline
176
#if __STDC_VERSION__ > 199901L
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/* it's a keyword */
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#else
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# if GCC_VERSION >= 2007
180
#  define inline __inline__   /* __inline__ prevents -pedantic warnings */
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# else
182
#  define inline  /* nothing */
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# endif
184
#endif
185
 
186
/* These are obsolete.  Do not use.  */
187
#ifndef IN_GCC
188
#define CONST           const
189
#define VOLATILE        volatile
190
#define SIGNED          signed
191
 
192
#define PROTO(type, name, arglist)      type name arglist
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#define EXFUN(name, proto)              name proto
194
#define DEFUN(name, arglist, args)      name(args)
195
#define DEFUN_VOID(name)                name(void)
196
#define AND             ,
197
#define DOTS            , ...
198
#define NOARGS          void
199
#endif /* ! IN_GCC */
200
 
201
#else   /* Not ANSI C.  */
202
 
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
 
212
#define VA_OPEN(AP, VAR)                { va_list AP; va_start(AP); { struct Qdmy
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#define VA_CLOSE(AP)                    } va_end(AP); }
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#define VA_FIXEDARG(AP, TYPE, NAME)     TYPE NAME = va_arg(AP, TYPE)
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216
/* some systems define these in header files for non-ansi mode */
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#undef const
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#undef volatile
219
#undef signed
220
#undef inline
221
#define const
222
#define volatile
223
#define signed
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#define inline
225
 
226
#ifndef IN_GCC
227
#define CONST
228
#define VOLATILE
229
#define SIGNED
230
 
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()
235
#define AND             ;
236
#define DOTS
237
#define NOARGS
238
#endif /* ! IN_GCC */
239
 
240
#endif  /* ANSI C.  */
241
 
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
 
246
#if (GCC_VERSION < 2007)
247
# define __attribute__(x)
248
#endif
249
 
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__))
254
# else
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 (!defined (__cplusplus) && GCC_VERSION >= 2093)
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#  define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
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# else
264
#  define ATTRIBUTE_UNUSED_LABEL
265
# endif /* !__cplusplus && GNUC >= 2.93 */
266
#endif /* ATTRIBUTE_UNUSED_LABEL */
267
 
268
#ifndef ATTRIBUTE_UNUSED
269
#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
270
#endif /* ATTRIBUTE_UNUSED */
271
 
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
 
280
#ifndef ATTRIBUTE_NORETURN
281
#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
282
#endif /* ATTRIBUTE_NORETURN */
283
 
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
 
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
 
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.  */
306
#ifndef ATTRIBUTE_PRINTF
307
#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) ATTRIBUTE_NONNULL(m)
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
 
315
/* Use ATTRIBUTE_FPTR_PRINTF when the format attribute is to be set on
316
   a function pointer.  Format attributes were allowed on function
317
   pointers as of gcc 3.1.  */
318
#ifndef ATTRIBUTE_FPTR_PRINTF
319
# if (GCC_VERSION >= 3001)
320
#  define ATTRIBUTE_FPTR_PRINTF(m, n) ATTRIBUTE_PRINTF(m, n)
321
# else
322
#  define ATTRIBUTE_FPTR_PRINTF(m, n)
323
# endif /* GNUC >= 3.1 */
324
# define ATTRIBUTE_FPTR_PRINTF_1 ATTRIBUTE_FPTR_PRINTF(1, 2)
325
# define ATTRIBUTE_FPTR_PRINTF_2 ATTRIBUTE_FPTR_PRINTF(2, 3)
326
# define ATTRIBUTE_FPTR_PRINTF_3 ATTRIBUTE_FPTR_PRINTF(3, 4)
327
# define ATTRIBUTE_FPTR_PRINTF_4 ATTRIBUTE_FPTR_PRINTF(4, 5)
328
# define ATTRIBUTE_FPTR_PRINTF_5 ATTRIBUTE_FPTR_PRINTF(5, 6)
329
#endif /* ATTRIBUTE_FPTR_PRINTF */
330
 
331
/* Use ATTRIBUTE_NULL_PRINTF when the format specifier may be NULL.  A
332
   NULL format specifier was allowed as of gcc 3.3.  */
333
#ifndef ATTRIBUTE_NULL_PRINTF
334
# if (GCC_VERSION >= 3003)
335
#  define ATTRIBUTE_NULL_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
336
# else
337
#  define ATTRIBUTE_NULL_PRINTF(m, n)
338
# endif /* GNUC >= 3.3 */
339
# define ATTRIBUTE_NULL_PRINTF_1 ATTRIBUTE_NULL_PRINTF(1, 2)
340
# define ATTRIBUTE_NULL_PRINTF_2 ATTRIBUTE_NULL_PRINTF(2, 3)
341
# define ATTRIBUTE_NULL_PRINTF_3 ATTRIBUTE_NULL_PRINTF(3, 4)
342
# define ATTRIBUTE_NULL_PRINTF_4 ATTRIBUTE_NULL_PRINTF(4, 5)
343
# define ATTRIBUTE_NULL_PRINTF_5 ATTRIBUTE_NULL_PRINTF(5, 6)
344
#endif /* ATTRIBUTE_NULL_PRINTF */
345
 
346
/* Attribute `sentinel' was valid as of gcc 3.5.  */
347
#ifndef ATTRIBUTE_SENTINEL
348
# if (GCC_VERSION >= 3005)
349
#  define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__))
350
# else
351
#  define ATTRIBUTE_SENTINEL
352
# endif /* GNUC >= 3.5 */
353
#endif /* ATTRIBUTE_SENTINEL */
354
 
355
 
356
#ifndef ATTRIBUTE_ALIGNED_ALIGNOF
357
# if (GCC_VERSION >= 3000)
358
#  define ATTRIBUTE_ALIGNED_ALIGNOF(m) __attribute__ ((__aligned__ (__alignof__ (m))))
359
# else
360
#  define ATTRIBUTE_ALIGNED_ALIGNOF(m)
361
# endif /* GNUC >= 3.0 */
362
#endif /* ATTRIBUTE_ALIGNED_ALIGNOF */
363
 
364
/* We use __extension__ in some places to suppress -pedantic warnings
365
   about GCC extensions.  This feature didn't work properly before
366
   gcc 2.8.  */
367
#if GCC_VERSION < 2008
368
#define __extension__
369
#endif
370
 
371
#endif  /* ansidecl.h   */

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