core/sys/cc.h

   1 /**
   2  * \file
   3  * Default definitions of C compiler quirk work-arounds.
   4  * \author Adam Dunkels <adam@dunkels.com>
   5  *
   6  * This file is used for making use of extra functionality of some C
   7  * compilers used for Contiki, and defining work-arounds for various
   8  * quirks and problems with some other C compilers.
   9  */
  10
  11 /*
  12  * Copyright (c) 2003, Adam Dunkels.
  13  * All rights reserved.
  14  *
  15  * Redistribution and use in source and binary forms, with or without
  16  * modification, are permitted provided that the following conditions
  17  * are met:
  18  * 1. Redistributions of source code must retain the above copyright
  19  *    notice, this list of conditions and the following disclaimer.
  20  * 2. Redistributions in binary form must reproduce the above
  21  *    copyright notice, this list of conditions and the following
  22  *    disclaimer in the documentation and/or other materials provided
  23  *    with the distribution.
  24  * 3. The name of the author may not be used to endorse or promote
  25  *    products derived from this software without specific prior
  26  *    written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  29  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  30  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  32  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  34  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  36  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  37  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  38  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  39  *
  40  * This file is part of the Contiki desktop OS
  41  *
  42  * $Id: cc.h,v 1.6 2008/07/02 08:35:29 adamdunkels Exp $
  43  *
  44  */
  45 #ifndef __CC_H__
  46 #define __CC_H__
  47
  48 #include "contiki-conf.h"
  49
  50 /**
  51  * Configure if the C compiler supports the "register" keyword for
  52  * function arguments.
  53  */
  54 #if CC_CONF_REGISTER_ARGS
  55 #define CC_REGISTER_ARG register
  56 #else /* CC_CONF_REGISTER_ARGS */
  57 #define CC_REGISTER_ARG
  58 #endif /* CC_CONF_REGISTER_ARGS */
  59
  60 /**
  61  * Configure if the C compiler supports the arguments for function
  62  * pointers.
  63  */
  64 #if CC_CONF_FUNCTION_POINTER_ARGS
  65 #define CC_FUNCTION_POINTER_ARGS 1
  66 #else /* CC_CONF_FUNCTION_POINTER_ARGS */
  67 #define CC_FUNCTION_POINTER_ARGS 0
  68 #endif /* CC_CONF_FUNCTION_POINTER_ARGS */
  69
  70 /**
  71  * Configure if the C compiler supports fastcall function
  72  * declarations.
  73  */
  74 #ifdef CC_CONF_FASTCALL
  75 #define CC_FASTCALL CC_CONF_FASTCALL
  76 #else /* CC_CONF_FASTCALL */
  77 #define CC_FASTCALL
  78 #endif /* CC_CONF_FASTCALL */
  79
  80 /**
  81  * Configure if the C compiler have problems with const function pointers
  82  */
  83 #ifdef CC_CONF_CONST_FUNCTION_BUG
  84 #define CC_CONST_FUNCTION
  85 #else /* CC_CONF_FASTCALL */
  86 #define CC_CONST_FUNCTION const
  87 #endif /* CC_CONF_FASTCALL */
  88
  89 /**
  90  * Configure work-around for unsigned char bugs with sdcc.
  91  */
  92 #if CC_CONF_UNSIGNED_CHAR_BUGS
  93 #define CC_UNSIGNED_CHAR_BUGS 1
  94 #else /* CC_CONF_UNSIGNED_CHAR_BUGS */
  95 #define CC_UNSIGNED_CHAR_BUGS 0
  96 #endif /* CC_CONF_UNSIGNED_CHAR_BUGS */
  97
  98 /**
  99  * Configure if C compiler supports double hash marks in C macros.
 100  */
 101 #if CC_CONF_DOUBLE_HASH
 102 #define CC_DOUBLE_HASH 1
 103 #else /* CC_CONF_DOUBLE_HASH */
 104 #define CC_DOUBLE_HASH 0
 105 #endif /* CC_CONF_DOUBLE_HASH */
 106
 107 #ifdef CC_CONF_INLINE
 108 #define CC_INLINE CC_CONF_INLINE
 109 #else /* CC_CONF_INLINE */
 110 #define CC_INLINE
 111 #endif /* CC_CONF_INLINE */
 112
 113 /**
 114  * Configure if the C compiler supports the assignment of struct value.
 115  */
 116 #ifdef CC_CONF_ASSIGN_AGGREGATE
 117 #define CC_ASSIGN_AGGREGATE(dest, src)  CC_CONF_ASSIGN_AGGREGATE(dest, src)
 118 #else /* CC_CONF_ASSIGN_AGGREGATE */
 119 #define CC_ASSIGN_AGGREGATE(dest, src)  *dest = *src
 120 #endif /* CC_CONF_ASSIGN_AGGREGATE */
 121
 122 #if CC_CONF_NO_VA_ARGS
 123 #define CC_NO_VA_ARGS CC_CONF_VA_ARGS
 124 #endif
 125
 126 #ifndef NULL
 127 #define NULL 0
 128 #endif /* NULL */
 129
 130 #define CC_CONCAT2(s1, s2) s1##s2
 131 /**
 132  * A C preprocessing macro for concatenating to
 133  * strings.
 134  *
 135  * We need use two macros (CC_CONCAT and CC_CONCAT2) in order to allow
 136  * concatenation of two #defined macros.
 137  */
 138 #define CC_CONCAT(s1, s2) CC_CONCAT2(s1, s2)
 139
 140 #endif /* __CC_H__ */