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1 /* Get common system includes and various definitions and declarations based
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2 on autoconf macros.
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3 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2009
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4 Free Software Foundation, Inc.
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify it under
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9 the terms of the GNU General Public License as published by the Free
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10 Software Foundation; either version 3, or (at your option) any later
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11 version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22
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23 #ifndef LIBCPP_SYSTEM_H
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24 #define LIBCPP_SYSTEM_H
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25
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26 /* We must include stdarg.h before stdio.h. */
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27 #include <stdarg.h>
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28
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29 #ifdef HAVE_STDDEF_H
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30 # include <stddef.h>
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31 #endif
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32
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33 #include <stdio.h>
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34
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35 /* Define a generic NULL if one hasn't already been defined. */
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36 #ifndef NULL
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37 #define NULL 0
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38 #endif
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39
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40 /* Use the unlocked open routines from libiberty. */
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41 #define fopen(PATH,MODE) fopen_unlocked(PATH,MODE)
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42 #define fdopen(FILDES,MODE) fdopen_unlocked(FILDES,MODE)
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43 #define freopen(PATH,MODE,STREAM) freopen_unlocked(PATH,MODE,STREAM)
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44
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45 /* The compiler is not a multi-threaded application and therefore we
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46 do not have to use the locking functions. In fact, using the locking
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47 functions can cause the compiler to be significantly slower under
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48 I/O bound conditions (such as -g -O0 on very large source files).
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49
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50 HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
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51 code is multi-thread safe by default. If it is set to 0, then do
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52 not worry about using the _unlocked functions.
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53
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54 fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
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55 extensions and need to be prototyped by hand (since we do not
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56 define _GNU_SOURCE). */
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57
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58 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
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59
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60 # ifdef HAVE_PUTC_UNLOCKED
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61 # undef putc
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62 # define putc(C, Stream) putc_unlocked (C, Stream)
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63 # endif
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64 # ifdef HAVE_PUTCHAR_UNLOCKED
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65 # undef putchar
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66 # define putchar(C) putchar_unlocked (C)
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67 # endif
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68 # ifdef HAVE_GETC_UNLOCKED
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69 # undef getc
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70 # define getc(Stream) getc_unlocked (Stream)
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71 # endif
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72 # ifdef HAVE_GETCHAR_UNLOCKED
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73 # undef getchar
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74 # define getchar() getchar_unlocked ()
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75 # endif
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76 # ifdef HAVE_FPUTC_UNLOCKED
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77 # undef fputc
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78 # define fputc(C, Stream) fputc_unlocked (C, Stream)
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79 # endif
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80
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81 # ifdef HAVE_CLEARERR_UNLOCKED
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82 # undef clearerr
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83 # define clearerr(Stream) clearerr_unlocked (Stream)
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84 # if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED
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85 extern void clearerr_unlocked (FILE *);
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86 # endif
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87 # endif
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88 # ifdef HAVE_FEOF_UNLOCKED
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89 # undef feof
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90 # define feof(Stream) feof_unlocked (Stream)
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91 # if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED
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92 extern int feof_unlocked (FILE *);
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93 # endif
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94 # endif
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95 # ifdef HAVE_FILENO_UNLOCKED
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96 # undef fileno
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97 # define fileno(Stream) fileno_unlocked (Stream)
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98 # if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED
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99 extern int fileno_unlocked (FILE *);
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100 # endif
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101 # endif
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102 # ifdef HAVE_FFLUSH_UNLOCKED
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103 # undef fflush
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104 # define fflush(Stream) fflush_unlocked (Stream)
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105 # if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED
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106 extern int fflush_unlocked (FILE *);
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107 # endif
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108 # endif
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109 # ifdef HAVE_FGETC_UNLOCKED
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110 # undef fgetc
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111 # define fgetc(Stream) fgetc_unlocked (Stream)
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112 # if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED
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113 extern int fgetc_unlocked (FILE *);
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114 # endif
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115 # endif
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116 # ifdef HAVE_FGETS_UNLOCKED
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117 # undef fgets
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118 # define fgets(S, n, Stream) fgets_unlocked (S, n, Stream)
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119 # if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED
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120 extern char *fgets_unlocked (char *, int, FILE *);
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121 # endif
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122 # endif
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123 # ifdef HAVE_FPUTS_UNLOCKED
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124 # undef fputs
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125 # define fputs(String, Stream) fputs_unlocked (String, Stream)
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126 # if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
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127 extern int fputs_unlocked (const char *, FILE *);
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128 # endif
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129 # endif
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130 # ifdef HAVE_FERROR_UNLOCKED
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131 # undef ferror
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132 # define ferror(Stream) ferror_unlocked (Stream)
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133 # if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED
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134 extern int ferror_unlocked (FILE *);
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135 # endif
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136 # endif
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137 # ifdef HAVE_FREAD_UNLOCKED
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138 # undef fread
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139 # define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream)
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140 # if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED
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141 extern size_t fread_unlocked (void *, size_t, size_t, FILE *);
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142 # endif
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143 # endif
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144 # ifdef HAVE_FWRITE_UNLOCKED
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145 # undef fwrite
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146 # define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
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147 # if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
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148 extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *);
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149 # endif
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150 # endif
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151 # ifdef HAVE_FPRINTF_UNLOCKED
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152 # undef fprintf
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153 /* We can't use a function-like macro here because we don't know if
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154 we have varargs macros. */
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155 # define fprintf fprintf_unlocked
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156 # if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
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157 extern int fprintf_unlocked (FILE *, const char *, ...);
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158 # endif
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159 # endif
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160
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161 #endif
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162
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163 /* ??? Glibc's fwrite/fread_unlocked macros cause
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164 "warning: signed and unsigned type in conditional expression". */
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165 #undef fread_unlocked
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166 #undef fwrite_unlocked
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167
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168 #include <sys/types.h>
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169 #include <errno.h>
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170
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171 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
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172 extern int errno;
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173 #endif
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174
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175 /* Some of glibc's string inlines cause warnings. Plus we'd rather
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176 rely on (and therefore test) GCC's string builtins. */
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177 #define __NO_STRING_INLINES
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178
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179 #ifdef STRING_WITH_STRINGS
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180 # include <string.h>
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181 # include <strings.h>
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182 #else
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183 # ifdef HAVE_STRING_H
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184 # include <string.h>
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185 # else
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186 # ifdef HAVE_STRINGS_H
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187 # include <strings.h>
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188 # endif
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189 # endif
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190 #endif
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191
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192 #ifdef HAVE_STDLIB_H
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193 # include <stdlib.h>
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194 #endif
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195
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196 #ifdef HAVE_UNISTD_H
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197 # include <unistd.h>
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198 #endif
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199
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200 #if HAVE_LIMITS_H
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201 # include <limits.h>
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202 #endif
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203
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204 /* Infrastructure for defining missing _MAX and _MIN macros. Note that
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205 macros defined with these cannot be used in #if. */
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206
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207 /* The extra casts work around common compiler bugs. */
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208 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
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209 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
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210 It is necessary at least when t == time_t. */
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211 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
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212 ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
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213 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
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214
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215 /* Use that infrastructure to provide a few constants. */
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216 #ifndef UCHAR_MAX
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217 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
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218 #endif
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219
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220 #ifdef TIME_WITH_SYS_TIME
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221 # include <sys/time.h>
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222 # include <time.h>
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223 #else
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224 # if HAVE_SYS_TIME_H
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225 # include <sys/time.h>
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226 # else
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227 # ifdef HAVE_TIME_H
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228 # include <time.h>
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229 # endif
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230 # endif
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231 #endif
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232
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233 #ifdef HAVE_FCNTL_H
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234 # include <fcntl.h>
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235 #else
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236 # ifdef HAVE_SYS_FILE_H
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237 # include <sys/file.h>
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238 # endif
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239 #endif
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240
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241 #ifdef HAVE_LOCALE_H
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242 # include <locale.h>
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243 #endif
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244
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245 #ifdef HAVE_LANGINFO_CODESET
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246 # include <langinfo.h>
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247 #endif
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248
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249 #ifndef HAVE_SETLOCALE
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250 # define setlocale(category, locale) (locale)
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251 #endif
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252
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253 #ifdef ENABLE_NLS
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254 #include <libintl.h>
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255 #else
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256 /* Stubs. */
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257 # undef dgettext
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258 # define dgettext(package, msgid) (msgid)
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259 #endif
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260
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261 #ifndef _
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262 # define _(msgid) dgettext (PACKAGE, msgid)
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263 #endif
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264
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265 #ifndef N_
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266 # define N_(msgid) msgid
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267 #endif
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268
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269 /* Some systems define these in, e.g., param.h. We undefine these names
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270 here to avoid the warnings. We prefer to use our definitions since we
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271 know they are correct. */
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272
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273 #undef MIN
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274 #undef MAX
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275 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
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276 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
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277
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278 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1. If they
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279 are defined to 0 then we must provide the relevant declaration
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280 here. These checks will be in the undefined state while configure
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281 is running so be careful to test "defined (HAVE_DECL_*)". */
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282
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283 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
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284 extern void abort (void);
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285 #endif
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286
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287 #if HAVE_SYS_STAT_H
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288 # include <sys/stat.h>
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289 #endif
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290
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291 /* Test if something is a normal file. */
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292 #ifndef S_ISREG
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293 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
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294 #endif
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295
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296 /* Test if something is a directory. */
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297 #ifndef S_ISDIR
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298 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
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299 #endif
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300
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301 /* Test if something is a character special file. */
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302 #ifndef S_ISCHR
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303 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
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304 #endif
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305
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306 /* Test if something is a block special file. */
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307 #ifndef S_ISBLK
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308 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
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309 #endif
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310
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311 /* Test if something is a socket. */
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312 #ifndef S_ISSOCK
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313 # ifdef S_IFSOCK
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314 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
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315 # else
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316 # define S_ISSOCK(m) 0
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317 # endif
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318 #endif
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319
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320 /* Test if something is a FIFO. */
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321 #ifndef S_ISFIFO
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322 # ifdef S_IFIFO
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323 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
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324 # else
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325 # define S_ISFIFO(m) 0
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326 # endif
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327 #endif
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328
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329 /* Approximate O_NOCTTY and O_BINARY. */
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330 #ifndef O_NOCTTY
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331 #define O_NOCTTY 0
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332 #endif
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333 #ifndef O_BINARY
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334 # define O_BINARY 0
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335 #endif
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336
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337 /* Filename handling macros. */
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338 #include "filenames.h"
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339
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340 /* Get libiberty declarations. */
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341 #include "libiberty.h"
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342 #include "safe-ctype.h"
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343
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344 /* 1 if we have C99 designated initializers.
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345
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346 ??? C99 designated initializers are not supported by most C++
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347 compilers, including G++. -- gdr, 2005-05-18 */
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348 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
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349 #define HAVE_DESIGNATED_INITIALIZERS \
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350 ((!defined(__cplusplus) && (GCC_VERSION >= 2007)) \
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351 || (__STDC_VERSION__ >= 199901L))
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352 #endif
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353
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354 /* Be conservative and only use enum bitfields with GCC.
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355 FIXME: provide a complete autoconf test for buggy enum bitfields. */
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356
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357 #if (GCC_VERSION > 2000)
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358 #define ENUM_BITFIELD(TYPE) __extension__ enum TYPE
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359 #else
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360 #define ENUM_BITFIELD(TYPE) unsigned int
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361 #endif
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362
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363 #ifndef offsetof
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364 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
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365 #endif
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366
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367 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
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368 the most likely value of A is B. This feature was added at some point
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369 between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */
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370 #if (GCC_VERSION < 3000)
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371 #define __builtin_expect(a, b) (a)
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372 #endif
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373
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374 /* Provide a fake boolean type. We make no attempt to use the
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375 C99 _Bool, as it may not be available in the bootstrap compiler,
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376 and even if it is, it is liable to be buggy.
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377 This must be after all inclusion of system headers, as some of
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378 them will mess us up. */
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379 #undef bool
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380 #undef true
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381 #undef false
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382 #undef TRUE
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383 #undef FALSE
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384
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385 #ifndef __cplusplus
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386 #define bool unsigned char
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387 #endif
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388 #define true 1
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389 #define false 0
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390
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391 /* Some compilers do not allow the use of unsigned char in bitfields. */
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392 #define BOOL_BITFIELD unsigned int
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393
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394 /* Poison identifiers we do not want to use. */
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395 #if (GCC_VERSION >= 3000)
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396 #undef calloc
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397 #undef strdup
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398 #undef malloc
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399 #undef realloc
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400 #pragma GCC poison calloc strdup
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401 #pragma GCC poison malloc realloc
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402
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403 /* Libiberty macros that are no longer used in GCC. */
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404 #undef ANSI_PROTOTYPES
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405 #undef PTR_CONST
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406 #undef LONG_DOUBLE
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407 #undef VPARAMS
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408 #undef VA_OPEN
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409 #undef VA_FIXEDARG
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410 #undef VA_CLOSE
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411 #undef VA_START
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412 #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
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413 VA_FIXEDARG VA_CLOSE VA_START
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414
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415 /* Note: not all uses of the `index' token (e.g. variable names and
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416 structure members) have been eliminated. */
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417 #undef bcopy
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418 #undef bzero
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419 #undef bcmp
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420 #undef rindex
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421 #pragma GCC poison bcopy bzero bcmp rindex
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422
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423 #endif /* GCC >= 3.0 */
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424 #endif /* ! LIBCPP_SYSTEM_H */
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