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  • only in /asuswrt-rt-n18u-9.0.0.4.380.2695/release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/usr/include/sys/
1/* Copyright (C) 1992-2001, 2002, 2004, 2005, 2006, 2007
2   Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public
7   License as published by the Free Software Foundation; either
8   version 2.1 of the License, or (at your option) any later version.
9
10   The GNU C Library 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 GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, write to the Free
17   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18   02111-1307 USA.  */
19
20#ifndef	_SYS_CDEFS_H
21#define	_SYS_CDEFS_H	1
22
23/* We are almost always included from features.h. */
24#ifndef _FEATURES_H
25# include <features.h>
26#endif
27
28/* The GNU libc does not support any K&R compilers or the traditional mode
29   of ISO C compilers anymore.  Check for some of the combinations not
30   anymore supported.  */
31#if defined __GNUC__ && !defined __STDC__
32# error "You need a ISO C conforming compiler to use the glibc headers"
33#endif
34
35/* Some user header file might have defined this before.  */
36#undef	__P
37#undef	__PMT
38
39#ifdef __GNUC__
40
41/* GCC can always grok prototypes.  For C++ programs we add throw()
42   to help it optimize the function calls.  But this works only with
43   gcc 2.8.x and egcs.  For gcc 3.2 and up we even mark C functions
44   as non-throwing using a function attribute since programs can use
45   the -fexceptions options for C code as well.  */
46# if !defined __cplusplus && __GNUC_PREREQ (3, 3)
47#  define __THROW	__attribute__ ((__nothrow__))
48#  define __NTH(fct)	__attribute__ ((__nothrow__)) fct
49# else
50#  if defined __cplusplus && __GNUC_PREREQ (2,8)
51#   define __THROW	throw ()
52#   define __NTH(fct)	fct throw ()
53#  else
54#   define __THROW
55#   define __NTH(fct)	fct
56#  endif
57# endif
58
59#else	/* Not GCC.  */
60
61# define __inline		/* No inline functions.  */
62
63# define __THROW
64# define __NTH(fct)	fct
65
66# define __const	const
67# define __signed	signed
68# define __volatile	volatile
69
70#endif	/* GCC.  */
71
72/* These two macros are not used in glibc anymore.  They are kept here
73   only because some other projects expect the macros to be defined.  */
74#define __P(args)	args
75#define __PMT(args)	args
76
77/* For these things, GCC behaves the ANSI way normally,
78   and the non-ANSI way under -traditional.  */
79
80#define __CONCAT(x,y)	x ## y
81#define __STRING(x)	#x
82
83/* This is not a typedef so `const __ptr_t' does the right thing.  */
84#define __ptr_t void *
85#define __long_double_t  long double
86
87
88/* C++ needs to know that types and declarations are C, not C++.  */
89#ifdef	__cplusplus
90# define __BEGIN_DECLS	extern "C" {
91# define __END_DECLS	}
92#else
93# define __BEGIN_DECLS
94# define __END_DECLS
95#endif
96
97
98/* The standard library needs the functions from the ISO C90 standard
99   in the std namespace.  At the same time we want to be safe for
100   future changes and we include the ISO C99 code in the non-standard
101   namespace __c99.  The C++ wrapper header take case of adding the
102   definitions to the global namespace.  */
103#if defined __cplusplus && defined _GLIBCPP_USE_NAMESPACES
104# define __BEGIN_NAMESPACE_STD	namespace std {
105# define __END_NAMESPACE_STD	}
106# define __USING_NAMESPACE_STD(name) using std::name;
107# define __BEGIN_NAMESPACE_C99	namespace __c99 {
108# define __END_NAMESPACE_C99	}
109# define __USING_NAMESPACE_C99(name) using __c99::name;
110#else
111/* For compatibility we do not add the declarations into any
112   namespace.  They will end up in the global namespace which is what
113   old code expects.  */
114# define __BEGIN_NAMESPACE_STD
115# define __END_NAMESPACE_STD
116# define __USING_NAMESPACE_STD(name)
117# define __BEGIN_NAMESPACE_C99
118# define __END_NAMESPACE_C99
119# define __USING_NAMESPACE_C99(name)
120#endif
121
122
123/* Fortify support.  */
124#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
125#define __bos0(ptr) __builtin_object_size (ptr, 0)
126
127#if __GNUC_PREREQ (4,3)
128# define __warndecl(name, msg) \
129  extern void name (void) __attribute__((__warning__ (msg)))
130# define __warnattr(msg) __attribute__((__warning__ (msg)))
131# define __errordecl(name, msg) \
132  extern void name (void) __attribute__((__error__ (msg)))
133#else
134# define __warndecl(name, msg) extern void name (void)
135# define __warnattr(msg)
136# define __errordecl(name, msg) extern void name (void)
137#endif
138
139/* Support for flexible arrays.  */
140#if __GNUC_PREREQ (2,97)
141/* GCC 2.97 supports C99 flexible array members.  */
142# define __flexarr	[]
143#else
144# ifdef __GNUC__
145#  define __flexarr	[0]
146# else
147#  if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
148#   define __flexarr	[]
149#  else
150/* Some other non-C99 compiler.  Approximate with [1].  */
151#   define __flexarr	[1]
152#  endif
153# endif
154#endif
155
156
157/* __asm__ ("xyz") is used throughout the headers to rename functions
158   at the assembly language level.  This is wrapped by the __REDIRECT
159   macro, in order to support compilers that can do this some other
160   way.  When compilers don't support asm-names at all, we have to do
161   preprocessor tricks instead (which don't have exactly the right
162   semantics, but it's the best we can do).
163
164   Example:
165   int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid); */
166
167#if defined __GNUC__ && __GNUC__ >= 2
168
169# define __REDIRECT(name, proto, alias) name proto __asm__ (__ASMNAME (#alias))
170# ifdef __cplusplus
171#  define __REDIRECT_NTH(name, proto, alias) \
172     name proto __THROW __asm__ (__ASMNAME (#alias))
173# else
174#  define __REDIRECT_NTH(name, proto, alias) \
175     name proto __asm__ (__ASMNAME (#alias)) __THROW
176# endif
177# define __ASMNAME(cname)  __ASMNAME2 (__USER_LABEL_PREFIX__, cname)
178# define __ASMNAME2(prefix, cname) __STRING (prefix) cname
179
180/*
181#elif __SOME_OTHER_COMPILER__
182
183# define __REDIRECT(name, proto, alias) name proto; \
184	_Pragma("let " #name " = " #alias)
185*/
186#endif
187
188/* GCC has various useful declarations that can be made with the
189   `__attribute__' syntax.  All of the ways we use this do fine if
190   they are omitted for compilers that don't understand it. */
191#if !defined __GNUC__ || __GNUC__ < 2
192# define __attribute__(xyz)	/* Ignore */
193#endif
194
195/* We make this a no-op unless it can be used as both a variable and
196   a type attribute.  gcc 2.8 is known to support both.  */
197#if __GNUC_PREREQ (2,8)
198# define __attribute_aligned__(size) __attribute__ ((__aligned__ (size)))
199#else
200# define __attribute_aligned__(size) /* Ignore */
201#endif
202
203/* At some point during the gcc 2.96 development the `malloc' attribute
204   for functions was introduced.  We don't want to use it unconditionally
205   (although this would be possible) since it generates warnings.  */
206#if __GNUC_PREREQ (2,96)
207# define __attribute_malloc__ __attribute__ ((__malloc__))
208#else
209# define __attribute_malloc__ /* Ignore */
210#endif
211
212/* At some point during the gcc 2.96 development the `pure' attribute
213   for functions was introduced.  We don't want to use it unconditionally
214   (although this would be possible) since it generates warnings.  */
215#if __GNUC_PREREQ (2,96)
216# define __attribute_pure__ __attribute__ ((__pure__))
217#else
218# define __attribute_pure__ /* Ignore */
219#endif
220
221/* At some point during the gcc 3.1 development the `used' attribute
222   for functions was introduced.  We don't want to use it unconditionally
223   (although this would be possible) since it generates warnings.  */
224#if __GNUC_PREREQ (3,1)
225# define __attribute_used__ __attribute__ ((__used__))
226# define __attribute_noinline__ __attribute__ ((__noinline__))
227#else
228# define __attribute_used__ __attribute__ ((__unused__))
229# define __attribute_noinline__ /* Ignore */
230#endif
231
232/* gcc allows marking deprecated functions.  */
233#if __GNUC_PREREQ (3,2) && !defined(__UCLIBC_HIDE_DEPRECATED__)
234# define __attribute_deprecated__ __attribute__ ((__deprecated__))
235#else
236# define __attribute_deprecated__ /* Ignore */
237#endif
238
239/* At some point during the gcc 2.8 development the `format_arg' attribute
240   for functions was introduced.  We don't want to use it unconditionally
241   (although this would be possible) since it generates warnings.
242   If several `format_arg' attributes are given for the same function, in
243   gcc-3.0 and older, all but the last one are ignored.  In newer gccs,
244   all designated arguments are considered.  */
245#if __GNUC_PREREQ (2,8)
246# define __attribute_format_arg__(x) __attribute__ ((__format_arg__ (x)))
247#else
248# define __attribute_format_arg__(x) /* Ignore */
249#endif
250
251/* At some point during the gcc 2.97 development the `strfmon' format
252   attribute for functions was introduced.  We don't want to use it
253   unconditionally (although this would be possible) since it
254   generates warnings.  */
255#if __GNUC_PREREQ (2,97)
256# define __attribute_format_strfmon__(a,b) \
257  __attribute__ ((__format__ (__strfmon__, a, b)))
258#else
259# define __attribute_format_strfmon__(a,b) /* Ignore */
260#endif
261
262/* The nonull function attribute allows to mark pointer parameters which
263   must not be NULL.  */
264#if __GNUC_PREREQ (3,3)
265# define __nonnull(params) __attribute__ ((__nonnull__ params))
266#else
267# define __nonnull(params)
268#endif
269
270/* If fortification mode, we warn about unused results of certain
271   function calls which can lead to problems.  */
272#if __GNUC_PREREQ (3,4)
273# define __attribute_warn_unused_result__ \
274   __attribute__ ((__warn_unused_result__))
275# if __USE_FORTIFY_LEVEL > 0
276#  define __wur __attribute_warn_unused_result__
277# endif
278#else
279# define __attribute_warn_unused_result__ /* empty */
280#endif
281#ifndef __wur
282# define __wur /* Ignore */
283#endif
284
285/* Forces a function to be always inlined.  */
286#if __GNUC_PREREQ (3,2)
287# define __always_inline __inline __attribute__ ((__always_inline__))
288#else
289# define __always_inline __inline
290#endif
291
292/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
293   inline semantics, unless -fgnu89-inline is used.
294   For -std=gnu99, forcing gnu_inline attribute does not change behavior,
295   but may silence spurious warnings (such as in GCC 4.2).  */
296#if !defined __cplusplus || __GNUC_PREREQ (4,3)
297# if defined __GNUC_STDC_INLINE__ || defined __GNUC_GNU_INLINE__ || defined __cplusplus
298#  define __extern_inline extern __inline __attribute__ ((__gnu_inline__))
299#  if __GNUC_PREREQ (4,3)
300#   define __extern_always_inline \
301  extern __always_inline __attribute__ ((__gnu_inline__, __artificial__))
302#  else
303#   define __extern_always_inline \
304  extern __always_inline __attribute__ ((__gnu_inline__))
305#  endif
306# else
307#  define __extern_inline extern __inline
308#  define __extern_always_inline extern __always_inline
309# endif
310#endif
311
312/* GCC 4.3 and above allow passing all anonymous arguments of an
313   __extern_always_inline function to some other vararg function.  */
314#if __GNUC_PREREQ (4,3)
315# define __va_arg_pack() __builtin_va_arg_pack ()
316# define __va_arg_pack_len() __builtin_va_arg_pack_len ()
317#endif
318
319/* It is possible to compile containing GCC extensions even if GCC is
320   run in pedantic mode if the uses are carefully marked using the
321   `__extension__' keyword.  But this is not generally available before
322   version 2.8.  */
323#if !__GNUC_PREREQ (2,8)
324# define __extension__		/* Ignore */
325#endif
326
327/* __restrict is known in EGCS 1.2 and above. */
328#if !__GNUC_PREREQ (2,92)
329# define __restrict	/* Ignore */
330#endif
331
332/* ISO C99 also allows to declare arrays as non-overlapping.  The syntax is
333     array_name[restrict]
334   GCC 3.1 supports this.  */
335#if __GNUC_PREREQ (3,1) && !defined __GNUG__
336# define __restrict_arr	__restrict
337#else
338# ifdef __GNUC__
339#  define __restrict_arr	/* Not supported in old GCC.  */
340# else
341#  if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
342#   define __restrict_arr	restrict
343#  else
344/* Some other non-C99 compiler.  */
345#   define __restrict_arr	/* Not supported.  */
346#  endif
347# endif
348#endif
349
350#endif	 /* sys/cdefs.h */
351