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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [sys/] [cdefs.h] - Blame information for rev 207

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1 207 jeremybenn
/* Copyright (C) 1992-2001, 2002, 2004, 2005, 2006, 2007
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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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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library 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 GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, write to the Free
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   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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   02111-1307 USA.  */
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#ifndef _SYS_CDEFS_H
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#define _SYS_CDEFS_H    1
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/* We are almost always included from features.h. */
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#ifndef _FEATURES_H
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# include <features.h>
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#endif
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/* The GNU libc does not support any K&R compilers or the traditional mode
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   of ISO C compilers anymore.  Check for some of the combinations not
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   anymore supported.  */
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#if defined __GNUC__ && !defined __STDC__
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# error "You need a ISO C conforming compiler to use the glibc headers"
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#endif
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/* Some user header file might have defined this before.  */
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#undef  __P
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#undef  __PMT
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#ifdef __GNUC__
40
 
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/* GCC can always grok prototypes.  For C++ programs we add throw()
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   to help it optimize the function calls.  But this works only with
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   gcc 2.8.x and egcs.  For gcc 3.2 and up we even mark C functions
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   as non-throwing using a function attribute since programs can use
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   the -fexceptions options for C code as well.  */
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# if !defined __cplusplus && __GNUC_PREREQ (3, 3)
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#  define __THROW       __attribute__ ((__nothrow__))
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#  define __NTH(fct)    __attribute__ ((__nothrow__)) fct
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# else
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#  if defined __cplusplus && __GNUC_PREREQ (2,8)
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#   define __THROW      throw ()
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#   define __NTH(fct)   fct throw ()
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#  else
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#   define __THROW
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#   define __NTH(fct)   fct
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#  endif
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# endif
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#else   /* Not GCC.  */
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# define __inline               /* No inline functions.  */
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# define __THROW
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# define __NTH(fct)     fct
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# define __const        const
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# define __signed       signed
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# define __volatile     volatile
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#endif  /* GCC.  */
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/* These two macros are not used in glibc anymore.  They are kept here
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   only because some other projects expect the macros to be defined.  */
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#define __P(args)       args
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#define __PMT(args)     args
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/* For these things, GCC behaves the ANSI way normally,
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   and the non-ANSI way under -traditional.  */
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#define __CONCAT(x,y)   x ## y
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#define __STRING(x)     #x
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/* This is not a typedef so `const __ptr_t' does the right thing.  */
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#define __ptr_t void *
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#define __long_double_t  long double
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/* C++ needs to know that types and declarations are C, not C++.  */
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#ifdef  __cplusplus
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# define __BEGIN_DECLS  extern "C" {
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# define __END_DECLS    }
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#else
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# define __BEGIN_DECLS
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# define __END_DECLS
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#endif
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/* The standard library needs the functions from the ISO C90 standard
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   in the std namespace.  At the same time we want to be safe for
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   future changes and we include the ISO C99 code in the non-standard
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   namespace __c99.  The C++ wrapper header take case of adding the
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   definitions to the global namespace.  */
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#if defined __cplusplus && defined _GLIBCPP_USE_NAMESPACES
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# define __BEGIN_NAMESPACE_STD  namespace std {
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# define __END_NAMESPACE_STD    }
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# define __USING_NAMESPACE_STD(name) using std::name;
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# define __BEGIN_NAMESPACE_C99  namespace __c99 {
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# define __END_NAMESPACE_C99    }
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# define __USING_NAMESPACE_C99(name) using __c99::name;
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#else
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/* For compatibility we do not add the declarations into any
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   namespace.  They will end up in the global namespace which is what
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   old code expects.  */
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# define __BEGIN_NAMESPACE_STD
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# define __END_NAMESPACE_STD
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# define __USING_NAMESPACE_STD(name)
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# define __BEGIN_NAMESPACE_C99
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# define __END_NAMESPACE_C99
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# define __USING_NAMESPACE_C99(name)
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#endif
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/* Support for bounded pointers.  */
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#ifndef __BOUNDED_POINTERS__
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# define __bounded      /* nothing */
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# define __unbounded    /* nothing */
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# define __ptrvalue     /* nothing */
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#endif
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130
 
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/* Fortify support.  */
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#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
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#define __bos0(ptr) __builtin_object_size (ptr, 0)
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#define __warndecl(name, msg) extern void name (void)
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136
 
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/* Support for flexible arrays.  */
138
#if __GNUC_PREREQ (2,97)
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/* GCC 2.97 supports C99 flexible array members.  */
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# define __flexarr      []
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#else
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# ifdef __GNUC__
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#  define __flexarr     [0]
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# else
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#  if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
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#   define __flexarr    []
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#  else
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/* Some other non-C99 compiler.  Approximate with [1].  */
149
#   define __flexarr    [1]
150
#  endif
151
# endif
152
#endif
153
 
154
 
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/* __asm__ ("xyz") is used throughout the headers to rename functions
156
   at the assembly language level.  This is wrapped by the __REDIRECT
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   macro, in order to support compilers that can do this some other
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   way.  When compilers don't support asm-names at all, we have to do
159
   preprocessor tricks instead (which don't have exactly the right
160
   semantics, but it's the best we can do).
161
 
162
   Example:
163
   int __REDIRECT(setpgrp, (__pid_t pid, __pid_t pgrp), setpgid); */
164
 
165
#if defined __GNUC__ && __GNUC__ >= 2
166
 
167
# define __REDIRECT(name, proto, alias) name proto __asm__ (__ASMNAME (#alias))
168
# ifdef __cplusplus
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#  define __REDIRECT_NTH(name, proto, alias) \
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     name proto __THROW __asm__ (__ASMNAME (#alias))
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# else
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#  define __REDIRECT_NTH(name, proto, alias) \
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     name proto __asm__ (__ASMNAME (#alias)) __THROW
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# endif
175
# define __ASMNAME(cname)  __ASMNAME2 (__USER_LABEL_PREFIX__, cname)
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# define __ASMNAME2(prefix, cname) __STRING (prefix) cname
177
 
178
/*
179
#elif __SOME_OTHER_COMPILER__
180
 
181
# define __REDIRECT(name, proto, alias) name proto; \
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        _Pragma("let " #name " = " #alias)
183
*/
184
#endif
185
 
186
/* GCC has various useful declarations that can be made with the
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   `__attribute__' syntax.  All of the ways we use this do fine if
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   they are omitted for compilers that don't understand it. */
189
#if !defined __GNUC__ || __GNUC__ < 2
190
# define __attribute__(xyz)     /* Ignore */
191
#endif
192
 
193
/* At some point during the gcc 2.96 development the `malloc' attribute
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   for functions was introduced.  We don't want to use it unconditionally
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   (although this would be possible) since it generates warnings.  */
196
#if __GNUC_PREREQ (2,96)
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# define __attribute_malloc__ __attribute__ ((__malloc__))
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#else
199
# define __attribute_malloc__ /* Ignore */
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#endif
201
 
202
/* At some point during the gcc 2.96 development the `pure' attribute
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   for functions was introduced.  We don't want to use it unconditionally
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   (although this would be possible) since it generates warnings.  */
205
#if __GNUC_PREREQ (2,96)
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# define __attribute_pure__ __attribute__ ((__pure__))
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#else
208
# define __attribute_pure__ /* Ignore */
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#endif
210
 
211
/* At some point during the gcc 3.1 development the `used' attribute
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   for functions was introduced.  We don't want to use it unconditionally
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   (although this would be possible) since it generates warnings.  */
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#if __GNUC_PREREQ (3,1)
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# define __attribute_used__ __attribute__ ((__used__))
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# define __attribute_noinline__ __attribute__ ((__noinline__))
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#else
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# define __attribute_used__ __attribute__ ((__unused__))
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# define __attribute_noinline__ /* Ignore */
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#endif
221
 
222
/* gcc allows marking deprecated functions.  */
223
#if __GNUC_PREREQ (3,2)
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# define __attribute_deprecated__ __attribute__ ((__deprecated__))
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#else
226
# define __attribute_deprecated__ /* Ignore */
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#endif
228
 
229
/* At some point during the gcc 2.8 development the `format_arg' attribute
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   for functions was introduced.  We don't want to use it unconditionally
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   (although this would be possible) since it generates warnings.
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   If several `format_arg' attributes are given for the same function, in
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   gcc-3.0 and older, all but the last one are ignored.  In newer gccs,
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   all designated arguments are considered.  */
235
#if __GNUC_PREREQ (2,8)
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# define __attribute_format_arg__(x) __attribute__ ((__format_arg__ (x)))
237
#else
238
# define __attribute_format_arg__(x) /* Ignore */
239
#endif
240
 
241
/* At some point during the gcc 2.97 development the `strfmon' format
242
   attribute for functions was introduced.  We don't want to use it
243
   unconditionally (although this would be possible) since it
244
   generates warnings.  */
245
#if __GNUC_PREREQ (2,97)
246
# define __attribute_format_strfmon__(a,b) \
247
  __attribute__ ((__format__ (__strfmon__, a, b)))
248
#else
249
# define __attribute_format_strfmon__(a,b) /* Ignore */
250
#endif
251
 
252
/* The nonull function attribute allows to mark pointer parameters which
253
   must not be NULL.  */
254
#if __GNUC_PREREQ (3,3)
255
# define __nonnull(params) __attribute__ ((__nonnull__ params))
256
#else
257
# define __nonnull(params)
258
#endif
259
 
260
/* If fortification mode, we warn about unused results of certain
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   function calls which can lead to problems.  */
262
#if __GNUC_PREREQ (3,4)
263
# define __attribute_warn_unused_result__ \
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   __attribute__ ((__warn_unused_result__))
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# if __USE_FORTIFY_LEVEL > 0
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#  define __wur __attribute_warn_unused_result__
267
# endif
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#else
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# define __attribute_warn_unused_result__ /* empty */
270
#endif
271
#ifndef __wur
272
# define __wur /* Ignore */
273
#endif
274
 
275
/* Forces a function to be always inlined.  */
276
#if __GNUC_PREREQ (3,2)
277
# define __always_inline __inline __attribute__ ((__always_inline__))
278
#else
279
# define __always_inline __inline
280
#endif
281
 
282
/* GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
283
   inline semantics, unless -fgnu89-inline is used.  */
284
#ifdef __GNUC_STDC_INLINE__
285
# define __extern_inline extern __inline __attribute__ ((__gnu_inline__))
286
# define __extern_always_inline \
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  extern __always_inline __attribute__ ((__gnu_inline__))
288
#else
289
# define __extern_inline extern __inline
290
# define __extern_always_inline extern __always_inline
291
#endif
292
 
293
/* It is possible to compile containing GCC extensions even if GCC is
294
   run in pedantic mode if the uses are carefully marked using the
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   `__extension__' keyword.  But this is not generally available before
296
   version 2.8.  */
297
#if !__GNUC_PREREQ (2,8)
298
# define __extension__          /* Ignore */
299
#endif
300
 
301
/* __restrict is known in EGCS 1.2 and above. */
302
#if !__GNUC_PREREQ (2,92)
303
# define __restrict     /* Ignore */
304
#endif
305
 
306
/* ISO C99 also allows to declare arrays as non-overlapping.  The syntax is
307
     array_name[restrict]
308
   GCC 3.1 supports this.  */
309
#if __GNUC_PREREQ (3,1) && !defined __GNUG__
310
# define __restrict_arr __restrict
311
#else
312
# ifdef __GNUC__
313
#  define __restrict_arr        /* Not supported in old GCC.  */
314
# else
315
#  if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
316
#   define __restrict_arr       restrict
317
#  else
318
/* Some other non-C99 compiler.  */
319
#   define __restrict_arr       /* Not supported.  */
320
#  endif
321
# endif
322
#endif
323
 
324
#include <bits/wordsize.h>
325
 
326
#if defined __LONG_DOUBLE_MATH_OPTIONAL && defined __NO_LONG_DOUBLE_MATH
327
# define __LDBL_COMPAT 1
328
# ifdef __REDIRECT
329
#  define __LDBL_REDIR1(name, proto, alias) __REDIRECT (name, proto, alias)
330
#  define __LDBL_REDIR(name, proto) \
331
  __LDBL_REDIR1 (name, proto, __nldbl_##name)
332
#  define __LDBL_REDIR1_NTH(name, proto, alias) __REDIRECT_NTH (name, proto, alias)
333
#  define __LDBL_REDIR_NTH(name, proto) \
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  __LDBL_REDIR1_NTH (name, proto, __nldbl_##name)
335
#  define __LDBL_REDIR1_DECL(name, alias) \
336
  extern __typeof (name) name __asm (__ASMNAME (#alias));
337
#  define __LDBL_REDIR_DECL(name) \
338
  extern __typeof (name) name __asm (__ASMNAME ("__nldbl_" #name));
339
# endif
340
#endif
341
#if !defined __LDBL_COMPAT || !defined __REDIRECT
342
# define __LDBL_REDIR1(name, proto, alias) name proto
343
# define __LDBL_REDIR(name, proto) name proto
344
# define __LDBL_REDIR1_NTH(name, proto, alias) name proto __THROW
345
# define __LDBL_REDIR_NTH(name, proto) name proto __THROW
346
# define __LDBL_REDIR_DECL(name)
347
#endif
348
 
349
#endif   /* sys/cdefs.h */

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