source: arduino-1-6-7/trunk/fuentes/arduino-ide-amd64/hardware/tools/avr/include/libiberty/ansidecl.h @ 4837

Last change on this file since 4837 was 4837, checked in by daduve, 2 years ago

Adding new version

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1/* ANSI and traditional C compatability macros
2   Copyright (C) 1991-2015 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5This program is free software; you can redistribute it and/or modify
6it under the terms of the GNU General Public License as published by
7the Free Software Foundation; either version 2 of the License, or
8(at your option) any later version.
9
10This program is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with this program; if not, write to the Free Software
17Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
18
19/* ANSI and traditional C compatibility macros
20
21   ANSI C is assumed if __STDC__ is #defined.
22
23   Macro                ANSI C definition       Traditional C definition
24   -----                ---- - ----------       ----------- - ----------
25   PTR                  `void *'                `char *'
26   const                not defined             `'
27   volatile             not defined             `'
28   signed               not defined             `'
29
30   For ease of writing code which uses GCC extensions but needs to be
31   portable to other compilers, we provide the GCC_VERSION macro that
32   simplifies testing __GNUC__ and __GNUC_MINOR__ together, and various
33   wrappers around __attribute__.  Also, __extension__ will be #defined
34   to nothing if it doesn't work.  See below.  */
35
36#ifndef _ANSIDECL_H
37#define _ANSIDECL_H     1
38
39#ifdef __cplusplus
40extern "C" {
41#endif
42
43/* Every source file includes this file,
44   so they will all get the switch for lint.  */
45/* LINTLIBRARY */
46
47/* Using MACRO(x,y) in cpp #if conditionals does not work with some
48   older preprocessors.  Thus we can't define something like this:
49
50#define HAVE_GCC_VERSION(MAJOR, MINOR) \
51  (__GNUC__ > (MAJOR) || (__GNUC__ == (MAJOR) && __GNUC_MINOR__ >= (MINOR)))
52
53and then test "#if HAVE_GCC_VERSION(2,7)".
54
55So instead we use the macro below and test it against specific values.  */
56
57/* This macro simplifies testing whether we are using gcc, and if it
58   is of a particular minimum version. (Both major & minor numbers are
59   significant.)  This macro will evaluate to 0 if we are not using
60   gcc at all.  */
61#ifndef GCC_VERSION
62#define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
63#endif /* GCC_VERSION */
64
65#if defined (__STDC__) || defined(__cplusplus) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(_WIN32)
66/* All known AIX compilers implement these things (but don't always
67   define __STDC__).  The RISC/OS MIPS compiler defines these things
68   in SVR4 mode, but does not define __STDC__.  */
69/* eraxxon@alumni.rice.edu: The Compaq C++ compiler, unlike many other
70   C++ compilers, does not define __STDC__, though it acts as if this
71   was so. (Verified versions: 5.7, 6.2, 6.3, 6.5) */
72
73#define PTR             void *
74
75#undef const
76#undef volatile
77#undef signed
78
79/* inline requires special treatment; it's in C99, and GCC >=2.7 supports
80   it too, but it's not in C89.  */
81#undef inline
82#if __STDC_VERSION__ >= 199901L || defined(__cplusplus) || (defined(__SUNPRO_C) && defined(__C99FEATURES__))
83/* it's a keyword */
84#else
85# if GCC_VERSION >= 2007
86#  define inline __inline__   /* __inline__ prevents -pedantic warnings */
87# else
88#  define inline  /* nothing */
89# endif
90#endif
91
92#else   /* Not ANSI C.  */
93
94#define PTR             char *
95
96/* some systems define these in header files for non-ansi mode */
97#undef const
98#undef volatile
99#undef signed
100#undef inline
101#define const
102#define volatile
103#define signed
104#define inline
105
106#endif  /* ANSI C.  */
107
108/* Define macros for some gcc attributes.  This permits us to use the
109   macros freely, and know that they will come into play for the
110   version of gcc in which they are supported.  */
111
112#if (GCC_VERSION < 2007)
113# define __attribute__(x)
114#endif
115
116/* Attribute __malloc__ on functions was valid as of gcc 2.96. */
117#ifndef ATTRIBUTE_MALLOC
118# if (GCC_VERSION >= 2096)
119#  define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
120# else
121#  define ATTRIBUTE_MALLOC
122# endif /* GNUC >= 2.96 */
123#endif /* ATTRIBUTE_MALLOC */
124
125/* Attributes on labels were valid as of gcc 2.93 and g++ 4.5.  For
126   g++ an attribute on a label must be followed by a semicolon.  */
127#ifndef ATTRIBUTE_UNUSED_LABEL
128# ifndef __cplusplus
129#  if GCC_VERSION >= 2093
130#   define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED
131#  else
132#   define ATTRIBUTE_UNUSED_LABEL
133#  endif
134# else
135#  if GCC_VERSION >= 4005
136#   define ATTRIBUTE_UNUSED_LABEL ATTRIBUTE_UNUSED ;
137#  else
138#   define ATTRIBUTE_UNUSED_LABEL
139#  endif
140# endif
141#endif
142
143/* Similarly to ARG_UNUSED below.  Prior to GCC 3.4, the C++ frontend
144   couldn't parse attributes placed after the identifier name, and now
145   the entire compiler is built with C++.  */
146#ifndef ATTRIBUTE_UNUSED
147#if GCC_VERSION >= 3004
148#  define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
149#else
150#define ATTRIBUTE_UNUSED
151#endif
152#endif /* ATTRIBUTE_UNUSED */
153
154/* Before GCC 3.4, the C++ frontend couldn't parse attributes placed after the
155   identifier name.  */
156#if ! defined(__cplusplus) || (GCC_VERSION >= 3004)
157# define ARG_UNUSED(NAME) NAME ATTRIBUTE_UNUSED
158#else /* !__cplusplus || GNUC >= 3.4 */
159# define ARG_UNUSED(NAME) NAME
160#endif /* !__cplusplus || GNUC >= 3.4 */
161
162#ifndef ATTRIBUTE_NORETURN
163#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
164#endif /* ATTRIBUTE_NORETURN */
165
166/* Attribute `nonnull' was valid as of gcc 3.3.  */
167#ifndef ATTRIBUTE_NONNULL
168# if (GCC_VERSION >= 3003)
169#  define ATTRIBUTE_NONNULL(m) __attribute__ ((__nonnull__ (m)))
170# else
171#  define ATTRIBUTE_NONNULL(m)
172# endif /* GNUC >= 3.3 */
173#endif /* ATTRIBUTE_NONNULL */
174
175/* Attribute `returns_nonnull' was valid as of gcc 4.9.  */
176#ifndef ATTRIBUTE_RETURNS_NONNULL
177# if (GCC_VERSION >= 4009)
178#  define ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
179# else
180#  define ATTRIBUTE_RETURNS_NONNULL
181# endif /* GNUC >= 4.9 */
182#endif /* ATTRIBUTE_RETURNS_NONNULL */
183
184/* Attribute `pure' was valid as of gcc 3.0.  */
185#ifndef ATTRIBUTE_PURE
186# if (GCC_VERSION >= 3000)
187#  define ATTRIBUTE_PURE __attribute__ ((__pure__))
188# else
189#  define ATTRIBUTE_PURE
190# endif /* GNUC >= 3.0 */
191#endif /* ATTRIBUTE_PURE */
192
193/* Use ATTRIBUTE_PRINTF when the format specifier must not be NULL.
194   This was the case for the `printf' format attribute by itself
195   before GCC 3.3, but as of 3.3 we need to add the `nonnull'
196   attribute to retain this behavior.  */
197#ifndef ATTRIBUTE_PRINTF
198#define ATTRIBUTE_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n))) ATTRIBUTE_NONNULL(m)
199#define ATTRIBUTE_PRINTF_1 ATTRIBUTE_PRINTF(1, 2)
200#define ATTRIBUTE_PRINTF_2 ATTRIBUTE_PRINTF(2, 3)
201#define ATTRIBUTE_PRINTF_3 ATTRIBUTE_PRINTF(3, 4)
202#define ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF(4, 5)
203#define ATTRIBUTE_PRINTF_5 ATTRIBUTE_PRINTF(5, 6)
204#endif /* ATTRIBUTE_PRINTF */
205
206/* Use ATTRIBUTE_FPTR_PRINTF when the format attribute is to be set on
207   a function pointer.  Format attributes were allowed on function
208   pointers as of gcc 3.1.  */
209#ifndef ATTRIBUTE_FPTR_PRINTF
210# if (GCC_VERSION >= 3001)
211#  define ATTRIBUTE_FPTR_PRINTF(m, n) ATTRIBUTE_PRINTF(m, n)
212# else
213#  define ATTRIBUTE_FPTR_PRINTF(m, n)
214# endif /* GNUC >= 3.1 */
215# define ATTRIBUTE_FPTR_PRINTF_1 ATTRIBUTE_FPTR_PRINTF(1, 2)
216# define ATTRIBUTE_FPTR_PRINTF_2 ATTRIBUTE_FPTR_PRINTF(2, 3)
217# define ATTRIBUTE_FPTR_PRINTF_3 ATTRIBUTE_FPTR_PRINTF(3, 4)
218# define ATTRIBUTE_FPTR_PRINTF_4 ATTRIBUTE_FPTR_PRINTF(4, 5)
219# define ATTRIBUTE_FPTR_PRINTF_5 ATTRIBUTE_FPTR_PRINTF(5, 6)
220#endif /* ATTRIBUTE_FPTR_PRINTF */
221
222/* Use ATTRIBUTE_NULL_PRINTF when the format specifier may be NULL.  A
223   NULL format specifier was allowed as of gcc 3.3.  */
224#ifndef ATTRIBUTE_NULL_PRINTF
225# if (GCC_VERSION >= 3003)
226#  define ATTRIBUTE_NULL_PRINTF(m, n) __attribute__ ((__format__ (__printf__, m, n)))
227# else
228#  define ATTRIBUTE_NULL_PRINTF(m, n)
229# endif /* GNUC >= 3.3 */
230# define ATTRIBUTE_NULL_PRINTF_1 ATTRIBUTE_NULL_PRINTF(1, 2)
231# define ATTRIBUTE_NULL_PRINTF_2 ATTRIBUTE_NULL_PRINTF(2, 3)
232# define ATTRIBUTE_NULL_PRINTF_3 ATTRIBUTE_NULL_PRINTF(3, 4)
233# define ATTRIBUTE_NULL_PRINTF_4 ATTRIBUTE_NULL_PRINTF(4, 5)
234# define ATTRIBUTE_NULL_PRINTF_5 ATTRIBUTE_NULL_PRINTF(5, 6)
235#endif /* ATTRIBUTE_NULL_PRINTF */
236
237/* Attribute `sentinel' was valid as of gcc 3.5.  */
238#ifndef ATTRIBUTE_SENTINEL
239# if (GCC_VERSION >= 3005)
240#  define ATTRIBUTE_SENTINEL __attribute__ ((__sentinel__))
241# else
242#  define ATTRIBUTE_SENTINEL
243# endif /* GNUC >= 3.5 */
244#endif /* ATTRIBUTE_SENTINEL */
245
246
247#ifndef ATTRIBUTE_ALIGNED_ALIGNOF
248# if (GCC_VERSION >= 3000)
249#  define ATTRIBUTE_ALIGNED_ALIGNOF(m) __attribute__ ((__aligned__ (__alignof__ (m))))
250# else
251#  define ATTRIBUTE_ALIGNED_ALIGNOF(m)
252# endif /* GNUC >= 3.0 */
253#endif /* ATTRIBUTE_ALIGNED_ALIGNOF */
254
255/* Useful for structures whose layout must much some binary specification
256   regardless of the alignment and padding qualities of the compiler.  */
257#ifndef ATTRIBUTE_PACKED
258# define ATTRIBUTE_PACKED __attribute__ ((packed))
259#endif
260
261/* Attribute `hot' and `cold' was valid as of gcc 4.3.  */
262#ifndef ATTRIBUTE_COLD
263# if (GCC_VERSION >= 4003)
264#  define ATTRIBUTE_COLD __attribute__ ((__cold__))
265# else
266#  define ATTRIBUTE_COLD
267# endif /* GNUC >= 4.3 */
268#endif /* ATTRIBUTE_COLD */
269#ifndef ATTRIBUTE_HOT
270# if (GCC_VERSION >= 4003)
271#  define ATTRIBUTE_HOT __attribute__ ((__hot__))
272# else
273#  define ATTRIBUTE_HOT
274# endif /* GNUC >= 4.3 */
275#endif /* ATTRIBUTE_HOT */
276
277/* Attribute 'no_sanitize_undefined' was valid as of gcc 4.9.  */
278#ifndef ATTRIBUTE_NO_SANITIZE_UNDEFINED
279# if (GCC_VERSION >= 4009)
280#  define ATTRIBUTE_NO_SANITIZE_UNDEFINED __attribute__ ((no_sanitize_undefined))
281# else
282#  define ATTRIBUTE_NO_SANITIZE_UNDEFINED
283# endif /* GNUC >= 4.9 */
284#endif /* ATTRIBUTE_NO_SANITIZE_UNDEFINED */
285
286/* We use __extension__ in some places to suppress -pedantic warnings
287   about GCC extensions.  This feature didn't work properly before
288   gcc 2.8.  */
289#if GCC_VERSION < 2008
290#define __extension__
291#endif
292
293/* This is used to declare a const variable which should be visible
294   outside of the current compilation unit.  Use it as
295     EXPORTED_CONST int i = 1;
296   This is because the semantics of const are different in C and C++.
297   "extern const" is permitted in C but it looks strange, and gcc
298   warns about it when -Wc++-compat is not used.  */
299#ifdef __cplusplus
300#define EXPORTED_CONST extern const
301#else
302#define EXPORTED_CONST const
303#endif
304
305/* Be conservative and only use enum bitfields with C++ or GCC.
306   FIXME: provide a complete autoconf test for buggy enum bitfields.  */
307
308#ifdef __cplusplus
309#define ENUM_BITFIELD(TYPE) enum TYPE
310#elif (GCC_VERSION > 2000)
311#define ENUM_BITFIELD(TYPE) __extension__ enum TYPE
312#else
313#define ENUM_BITFIELD(TYPE) unsigned int
314#endif
315
316    /* This is used to mark a class or virtual function as final.  */
317#if __cplusplus >= 201103L
318#define GCC_FINAL final
319#elif GCC_VERSION >= 4007
320#define GCC_FINAL __final
321#else
322#define GCC_FINAL
323#endif
324
325#ifdef __cplusplus
326}
327#endif
328
329#endif  /* ansidecl.h   */
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