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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. /*
  62.  * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
  63.  * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
  64.  * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
  65.  * mode -- there must be no spaces between its arguments, and for nested
  66.  * __CONCAT's, all the __CONCAT's must be at the left.  __CONCAT can also
  67.  * concatenate double-quoted strings produced by the __STRING macro, but
  68.  * this only works with ANSI C.
  69.  *
  70.  * __XSTRING is like __STRING, but it expands any macros in its argument
  71.  * first.  It is only available with ANSI C.
  72.  */
  73. #define __CONCAT1(x,y)  x ## y
  74. #define __CONCAT(x,y)   __CONCAT1(x,y)
  75. #define __STRING(x)     #x              /* stringify without expanding x */
  76. #define __XSTRING(x)    __STRING(x)     /* expand x, then stringify */
  77.  
  78. #ifdef __GNUC__
  79. # define __ASMNAME(cname)  __XSTRING (__USER_LABEL_PREFIX__) cname
  80. #endif
  81.  
  82. #define __ptr_t void *
  83. #define __long_double_t  long double
  84.  
  85. #define __attribute_malloc__
  86. #define __attribute_pure__
  87. #define __attribute_format_strfmon__(a,b)
  88. #define __flexarr      [0]
  89.  
  90. #ifdef  __cplusplus
  91. # define __BEGIN_DECLS  extern "C" {
  92. # define __END_DECLS    }
  93. #else
  94. # define __BEGIN_DECLS
  95. # define __END_DECLS
  96. #endif
  97.  
  98. #ifndef __BOUNDED_POINTERS__
  99. # define __bounded      /* nothing */
  100. # define __unbounded    /* nothing */
  101. # define __ptrvalue     /* nothing */
  102. #endif
  103.  
  104. #ifdef __GNUC__
  105. #define __strong_reference(sym,aliassym)        \
  106.         extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
  107. #ifdef __ELF__
  108. #ifdef __STDC__
  109. #define __weak_reference(sym,alias)     \
  110.         __asm__(".weak " #alias);       \
  111.         __asm__(".equ "  #alias ", " #sym)
  112. #define __warn_references(sym,msg)      \
  113.         __asm__(".section .gnu.warning." #sym); \
  114.         __asm__(".asciz \"" msg "\"");  \
  115.         __asm__(".previous")
  116. #else
  117. #define __weak_reference(sym,alias)     \
  118.         __asm__(".weak alias");         \
  119.         __asm__(".equ alias, sym")
  120. #define __warn_references(sym,msg)      \
  121.         __asm__(".section .gnu.warning.sym"); \
  122.         __asm__(".asciz \"msg\"");      \
  123.         __asm__(".previous")
  124. #endif  /* __STDC__ */
  125. #else   /* !__ELF__ */
  126. #ifdef __STDC__
  127. #define __weak_reference(sym,alias)     \
  128.         __asm__(".stabs \"_" #alias "\",11,0,0,0");     \
  129.         __asm__(".stabs \"_" #sym "\",1,0,0,0")
  130. #define __warn_references(sym,msg)      \
  131.         __asm__(".stabs \"" msg "\",30,0,0,0");         \
  132.         __asm__(".stabs \"_" #sym "\",1,0,0,0")
  133. #else
  134. #define __weak_reference(sym,alias)     \
  135.         __asm__(".stabs \"_/**/alias\",11,0,0,0");      \
  136.         __asm__(".stabs \"_/**/sym\",1,0,0,0")
  137. #define __warn_references(sym,msg)      \
  138.         __asm__(".stabs msg,30,0,0,0");                 \
  139.         __asm__(".stabs \"_/**/sym\",1,0,0,0")
  140. #endif  /* __STDC__ */
  141. #endif  /* __ELF__ */
  142. #endif  /* __GNUC__ */
  143.  
  144. #endif /* _SYS_CDEFS_H */
  145.