fbsdcompat/sys/cdefs.h

   1 /*
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Berkeley Software Design, Inc.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)cdefs.h     8.8 (Berkeley) 1/9/95
  37  * $FreeBSD: /repoman/r/ncvs/src/sys/sys/cdefs.h,v 1.68 2002/10/21 20:50:30 mike Exp $
  38  */
  39
  40 #ifndef _SYS_CDEFS_H_
  41
  42 /*
  43  * Compiler-dependent macros to help declare dead (non-returning) and
  44  * pure (no side effects) functions, and unused variables.  They are
  45  * null except for versions of gcc that are known to support the features
  46  * properly (old versions of gcc-2 supported the dead and pure features
  47  * in a different (wrong) way).  If we do not provide an implementation
  48  * for a given compiler, let the compile fail if it is told to use
  49  * a feature that we cannot live without.
  50  */
  51 #ifdef lint
  52 #define __packed
  53 #define __aligned(x)
  54 #define __section(x)
  55 #else
  56 #define __packed        __attribute__((__packed__))
  57 #define __aligned(x)    __attribute__((__aligned__(x)))
  58 #define __section(x)    __attribute__((__section__(x)))
  59 #endif
  60
  61 #if !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
  62 #define __LONG_LONG_SUPPORTED
  63 #endif
  64
  65 /*
  66  * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
  67  * require it.
  68  */
  69 #define __offsetof(type, field) ((size_t)(&((type *)0)->field))
  70
  71 #define __strong_reference(sym,aliassym)        \
  72         extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
  73 #define __weak_reference(sym,alias)
  74 #define __warn_references(sym,msg)
  75
  76 #ifndef __RCSID_SOURCE
  77 #ifndef NO__RCSID_SOURCE
  78 #define __RCSID_SOURCE(s)       __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
  79 #else
  80 #define __RCSID_SOURCE(s)
  81 #endif
  82 #endif
  83
  84 #ifndef __DECONST
  85 #define __DECONST(type, var)    ((type)(uintptr_t)(const void *)(var))
  86 #endif
  87
  88 #ifndef __DEVOLATILE
  89 #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var))
  90 #endif
  91
  92 #ifndef __DEQUALIFY
  93 #define __DEQUALIFY(type, var)  ((type)(uintptr_t)(const volatile void *)(var))
  94 #endif
  95
  96 /*
  97  * Now include the Apple version of sys/cdefs.h
  98  */
  99
 100 #include_next <sys/cdefs.h>
 101
 102 /*
 103  * Use FreeBSD version of __CONCAT
 104  */
 105 #if defined(__STDC__) || defined(__cplusplus)
 106 #undef __CONCAT1
 107 #undef __CONCAT
 108 #define __CONCAT1(x,y)  x ## y
 109 #define __CONCAT(x,y)   __CONCAT1(x,y)
 110 #endif
 111
 112 /*
 113  * Deal with all versions of POSIX.  The ordering relative to the tests above is
 114  * important.
 115  */
 116 #ifdef _POSIX_C_SOURCE
 117 #if _POSIX_C_SOURCE >= 200112
 118 #define __POSIX_VISIBLE         200112
 119 #define __ISO_C_VISIBLE         1999
 120 #elif _POSIX_C_SOURCE >= 199506
 121 #define __POSIX_VISIBLE         199506
 122 #define __ISO_C_VISIBLE         1990
 123 #elif _POSIX_C_SOURCE >= 199309
 124 #define __POSIX_VISIBLE         199309
 125 #define __ISO_C_VISIBLE         1990
 126 #elif _POSIX_C_SOURCE >= 199209
 127 #define __POSIX_VISIBLE         199209
 128 #define __ISO_C_VISIBLE         1990
 129 #elif _POSIX_C_SOURCE >= 199009
 130 #define __POSIX_VISIBLE         199009
 131 #define __ISO_C_VISIBLE         1990
 132 #else
 133 #define __POSIX_VISIBLE         198808
 134 #define __ISO_C_VISIBLE         0
 135 #endif /* _POSIX_C_SOURCE */
 136 #else
 137 /*-
 138  * Deal with _ANSI_SOURCE:
 139  * If it is defined, and no other compilation environment is explicitly
 140  * requested, then define our internal feature-test macros to zero.  This
 141  * makes no difference to the preprocessor (undefined symbols in preprocessing
 142  * expressions are defined to have value zero), but makes it more convenient for
 143  * a test program to print out the values.
 144  *
 145  * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
 146  * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
 147  * environment (and in fact we will never get here).
 148  */
 149 #if defined(_ANSI_SOURCE)       /* Hide almost everything. */
 150 #define __POSIX_VISIBLE         0
 151 #define __XSI_VISIBLE           0
 152 #define __BSD_VISIBLE           0
 153 #define __ISO_C_VISIBLE         1990
 154 #elif defined(_C99_SOURCE)      /* Localism to specify strict C99 env. */
 155 #define __POSIX_VISIBLE         0
 156 #define __XSI_VISIBLE           0
 157 #define __BSD_VISIBLE           0
 158 #define __ISO_C_VISIBLE         1999
 159 #else                           /* Default environment: show everything. */
 160 #define __POSIX_VISIBLE         200112
 161 #define __XSI_VISIBLE           600
 162 #define __BSD_VISIBLE           1
 163 #define __ISO_C_VISIBLE         1999
 164 #endif
 165 #endif
 166
 167 #endif /* !_SYS_CDEFS_H_ */