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  1. /* libc/sys/linux/sys/cdefs.h - Helper macros for K&R vs. ANSI C compat. */
  2.  
  3. /* Written 2000 by Werner Almesberger */
  4.  
  5. /*
  6.  * Copyright (c) 1991, 1993
  7.  *      The Regents of the University of California.  All rights reserved.
  8.  *
  9.  * This code is derived from software contributed to Berkeley by
  10.  * Berkeley Software Design, Inc.
  11.  *
  12.  * Redistribution and use in source and binary forms, with or without
  13.  * modification, are permitted provided that the following conditions
  14.  * are met:
  15.  * 1. Redistributions of source code must retain the above copyright
  16.  *    notice, this list of conditions and the following disclaimer.
  17.  * 2. Redistributions in binary form must reproduce the above copyright
  18.  *    notice, this list of conditions and the following disclaimer in the
  19.  *    documentation and/or other materials provided with the distribution.
  20.  * 3. All advertising materials mentioning features or use of this software
  21.  *    must display the following acknowledgement:
  22.  *      This product includes software developed by the University of
  23.  *      California, Berkeley and its contributors.
  24.  * 4. Neither the name of the University nor the names of its contributors
  25.  *    may be used to endorse or promote products derived from this software
  26.  *    without specific prior written permission.
  27.  *
  28.  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38.  * SUCH DAMAGE.
  39.  *
  40.  *      @(#)cdefs.h     8.8 (Berkeley) 1/9/95
  41.  * $FreeBSD: src/sys/sys/cdefs.h,v 1.54 2002/05/11 03:58:24 alfred Exp $
  42.  */
  43.  
  44. #ifndef _SYS_CDEFS_H
  45. #define _SYS_CDEFS_H
  46.  
  47. #define __FBSDID(x) /* nothing */
  48. /*
  49.  * Note: the goal here is not compatibility to K&R C. Since we know that we
  50.  * have GCC which understands ANSI C perfectly well, we make use of this.
  51.  */
  52.  
  53. #define __P(args)       args
  54. #define __PMT(args)     args
  55. #define __const         const
  56. #define __signed        signed
  57. #define __volatile      volatile
  58. #define __DOTS          , ...
  59. #define __THROW
  60.  
  61. #define __ptr_t void *
  62. #define __long_double_t  long double
  63.  
  64. #define __attribute_malloc__
  65. #define __attribute_pure__
  66. #define __attribute_format_strfmon__(a,b)
  67. #define __flexarr      [0]
  68.  
  69. #ifdef  __cplusplus
  70. # define __BEGIN_DECLS  extern "C" {
  71. # define __END_DECLS    }
  72. #else
  73. # define __BEGIN_DECLS
  74. # define __END_DECLS
  75. #endif
  76.  
  77. #ifndef __BOUNDED_POINTERS__
  78. # define __bounded      /* nothing */
  79. # define __unbounded    /* nothing */
  80. # define __ptrvalue     /* nothing */
  81. #endif
  82.  
  83. #ifdef __GNUC__
  84. #define __strong_reference(sym,aliassym)        \
  85.         extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
  86. #ifdef __ELF__
  87. #ifdef __STDC__
  88. #define __weak_reference(sym,alias)     \
  89.         __asm__(".weak " #alias);       \
  90.         __asm__(".equ "  #alias ", " #sym)
  91. #define __warn_references(sym,msg)      \
  92.         __asm__(".section .gnu.warning." #sym); \
  93.         __asm__(".asciz \"" msg "\"");  \
  94.         __asm__(".previous")
  95. #else
  96. #define __weak_reference(sym,alias)     \
  97.         __asm__(".weak alias");         \
  98.         __asm__(".equ alias, sym")
  99. #define __warn_references(sym,msg)      \
  100.         __asm__(".section .gnu.warning.sym"); \
  101.         __asm__(".asciz \"msg\"");      \
  102.         __asm__(".previous")
  103. #endif  /* __STDC__ */
  104. #else   /* !__ELF__ */
  105. #ifdef __STDC__
  106. #define __weak_reference(sym,alias)     \
  107.         __asm__(".stabs \"_" #alias "\",11,0,0,0");     \
  108.         __asm__(".stabs \"_" #sym "\",1,0,0,0")
  109. #define __warn_references(sym,msg)      \
  110.         __asm__(".stabs \"" msg "\",30,0,0,0");         \
  111.         __asm__(".stabs \"_" #sym "\",1,0,0,0")
  112. #else
  113. #define __weak_reference(sym,alias)     \
  114.         __asm__(".stabs \"_/**/alias\",11,0,0,0");      \
  115.         __asm__(".stabs \"_/**/sym\",1,0,0,0")
  116. #define __warn_references(sym,msg)      \
  117.         __asm__(".stabs msg,30,0,0,0");                 \
  118.         __asm__(".stabs \"_/**/sym\",1,0,0,0")
  119. #endif  /* __STDC__ */
  120. #endif  /* __ELF__ */
  121. #endif  /* __GNUC__ */
  122.  
  123. #endif /* _SYS_CDEFS_H */
  124.