gcc/system.h

   1 /* system.h - Get common system includes and various definitions and
   2    declarations based on autoconf macros.
   3    Copyright (C) 1998, 1999 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef __GCC_SYSTEM_H__
  23 #define __GCC_SYSTEM_H__
  24
  25 /* We must include stdarg.h/varargs.h before stdio.h. */
  26 #ifdef ANSI_PROTOTYPES
  27 #include <stdarg.h>
  28 #else
  29 #include <varargs.h>
  30 #endif
  31
  32 #include <stdio.h>
  33
  34 /* Define a generic NULL if one hasn't already been defined.  */
  35 #ifndef NULL
  36 #define NULL 0
  37 #endif
  38
  39 /* The compiler is not a multi-threaded application and therefore we
  40    do not have to use the locking functions.  */
  41 #ifdef HAVE_PUTC_UNLOCKED
  42 # undef putc
  43 # define putc(C, Stream) putc_unlocked (C, Stream)
  44 #endif
  45 #ifdef HAVE_FPUTC_UNLOCKED
  46 # undef fputc
  47 # define fputc(C, Stream) fputc_unlocked (C, Stream)
  48 #endif
  49 #ifdef HAVE_FPUTS_UNLOCKED
  50 # undef fputs
  51 # define fputs(String, Stream) fputs_unlocked (String, Stream)
  52 #endif
  53
  54 #include <ctype.h>
  55
  56 /* Jim Meyering writes:
  57
  58    "... Some ctype macros are valid only for character codes that
  59    isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
  60    using /bin/cc or gcc but without giving an ansi option).  So, all
  61    ctype uses should be through macros like ISPRINT...  If
  62    STDC_HEADERS is defined, then autoconf has verified that the ctype
  63    macros don't need to be guarded with references to isascii. ...
  64    Defining isascii to 1 should let any compiler worth its salt
  65    eliminate the && through constant folding."
  66
  67    Bruno Haible adds:
  68
  69    "... Furthermore, isupper(c) etc. have an undefined result if c is
  70    outside the range -1 <= c <= 255. One is tempted to write isupper(c)
  71    with c being of type `char', but this is wrong if c is an 8-bit
  72    character >= 128 which gets sign-extended to a negative value.
  73    The macro ISUPPER protects against this as well."  */
  74
  75 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
  76 # define IN_CTYPE_DOMAIN(c) 1
  77 #else
  78 # define IN_CTYPE_DOMAIN(c) isascii(c)
  79 #endif
  80
  81 #ifdef isblank
  82 # define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c))
  83 #else
  84 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
  85 #endif
  86 #ifdef isgraph
  87 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (c))
  88 #else
  89 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (c) && !isspace (c))
  90 #endif
  91
  92 #define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
  93 #define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c))
  94 #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
  95 #define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c))
  96 #define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))
  97 #define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (c))
  98 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
  99 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
 100 #define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c))
 101 #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
 102
 103 /* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
 104    - Its arg may be any int or unsigned int; it need not be an unsigned char.
 105    - It's guaranteed to evaluate its argument exactly once.
 106    - It's typically faster.
 107    Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
 108    only '0' through '9' are digits.  Prefer ISDIGIT to ISDIGIT_LOCALE unless
 109    it's important to use the locale's definition of `digit' even when the
 110    host does not conform to Posix.  */
 111 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
 112
 113
 114 #include <sys/types.h>
 115 #include <errno.h>
 116
 117 #ifndef errno
 118 extern int errno;
 119 #endif
 120
 121 #ifdef STRING_WITH_STRINGS
 122 # include <string.h>
 123 # include <strings.h>
 124 #else
 125 # ifdef HAVE_STRING_H
 126 #  include <string.h>
 127 # else
 128 #  ifdef HAVE_STRINGS_H
 129 #   include <strings.h>
 130 #  endif
 131 # endif
 132 #endif
 133
 134 #ifdef HAVE_STDLIB_H
 135 # include <stdlib.h>
 136 #endif
 137
 138 #ifdef HAVE_UNISTD_H
 139 # include <unistd.h>
 140 #endif
 141
 142 #ifdef HAVE_SYS_PARAM_H
 143 # include <sys/param.h>
 144 #endif
 145
 146 #if HAVE_LIMITS_H
 147 # include <limits.h>
 148 #endif
 149
 150 /* Find HOST_WIDEST_INT and set its bit size, type and print macros.
 151    It will be the largest integer mode supported by the host which may
 152    (or may not) be larger than HOST_WIDE_INT.  This must appear after
 153    <limits.h> since we only use `long long' if its bigger than a
 154    `long' and also if it is supported by macros in limits.h.  For old
 155    hosts which don't have a limits.h (and thus won't include it in
 156    stage2 cause we don't rerun configure) we assume gcc supports long
 157    long.)  Note, you won't get these defined if you don't include
 158    {ht}config.h before this file to set the HOST_BITS_PER_* macros. */
 159
 160 #ifndef HOST_WIDEST_INT
 161 # if defined (HOST_BITS_PER_LONG) && defined (HOST_BITS_PER_LONGLONG)
 162 #  if (HOST_BITS_PER_LONGLONG > HOST_BITS_PER_LONG) && (defined (LONG_LONG_MAX) || defined (LONGLONG_MAX) || defined (LLONG_MAX) || defined (__GNUC__))
 163 #   define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER_LONGLONG
 164 #   define HOST_WIDEST_INT long long
 165 #   define HOST_WIDEST_INT_PRINT_DEC "%lld"
 166 #   define HOST_WIDEST_INT_PRINT_UNSIGNED "%llu"
 167 #   define HOST_WIDEST_INT_PRINT_HEX "0x%llx"
 168 #  else
 169 #   define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER_LONG
 170 #   define HOST_WIDEST_INT long
 171 #   define HOST_WIDEST_INT_PRINT_DEC "%ld"
 172 #   define HOST_WIDEST_INT_PRINT_UNSIGNED "%lu"
 173 #   define HOST_WIDEST_INT_PRINT_HEX "0x%lx"
 174 #  endif /*(long long>long) && (LONG_LONG_MAX||LONGLONG_MAX||LLONG_MAX||GNUC)*/
 175 # endif /* defined(HOST_BITS_PER_LONG) && defined(HOST_BITS_PER_LONGLONG) */
 176 #endif /* ! HOST_WIDEST_INT */
 177
 178 #ifdef TIME_WITH_SYS_TIME
 179 # include <sys/time.h>
 180 # include <time.h>
 181 #else
 182 # if HAVE_SYS_TIME_H
 183 #  include <sys/time.h>
 184 # else
 185 #  ifdef HAVE_TIME_H
 186 #   include <time.h>
 187 #  endif
 188 # endif
 189 #endif
 190
 191 #ifdef HAVE_FCNTL_H
 192 # include <fcntl.h>
 193 #else
 194 # ifdef HAVE_SYS_FILE_H
 195 #  include <sys/file.h>
 196 # endif
 197 #endif
 198
 199 #ifndef SEEK_SET
 200 # define SEEK_SET 0
 201 # define SEEK_CUR 1
 202 # define SEEK_END 2
 203 #endif
 204 #ifndef F_OK
 205 # define F_OK 0
 206 # define X_OK 1
 207 # define W_OK 2
 208 # define R_OK 4
 209 #endif
 210 #ifndef O_RDONLY
 211 # define O_RDONLY 0
 212 #endif
 213 #ifndef O_WRONLY
 214 # define O_WRONLY 1
 215 #endif
 216
 217 /* Some systems define these in, e.g., param.h.  We undefine these names
 218    here to avoid the warnings.  We prefer to use our definitions since we
 219    know they are correct.  */
 220
 221 #undef MIN
 222 #undef MAX
 223 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 224 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 225
 226 #ifdef HAVE_SYS_WAIT_H
 227 #include <sys/wait.h>
 228 #endif
 229
 230 #ifndef WIFSIGNALED
 231 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 232 #endif
 233 #ifndef WTERMSIG
 234 #define WTERMSIG(S) ((S) & 0x7f)
 235 #endif
 236 #ifndef WIFEXITED
 237 #define WIFEXITED(S) (((S) & 0xff) == 0)
 238 #endif
 239 #ifndef WEXITSTATUS
 240 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 241 #endif
 242
 243
 244
 245 #ifndef bcopy
 246 # ifdef HAVE_BCOPY
 247 #  ifdef NEED_DECLARATION_BCOPY
 248 extern void bcopy ();
 249 #  endif
 250 # else /* ! HAVE_BCOPY */
 251 #  define bcopy(src,dst,len) memmove((dst),(src),(len))
 252 # endif
 253 #endif
 254
 255 #ifndef bcmp
 256 # ifdef HAVE_BCMP
 257 #  ifdef NEED_DECLARATION_BCMP
 258 extern int bcmp ();
 259 #  endif
 260 # else /* ! HAVE_BCMP */
 261 #  define bcmp(left,right,len) memcmp ((left),(right),(len))
 262 # endif
 263 #endif
 264
 265 #ifndef bzero
 266 # ifdef HAVE_BZERO
 267 #  ifdef NEED_DECLARATION_BZERO
 268 extern void bzero ();
 269 #  endif
 270 # else /* ! HAVE_BZERO */
 271 #  define bzero(dst,len) memset ((dst),0,(len))
 272 # endif
 273 #endif
 274
 275 #ifndef index
 276 # ifdef HAVE_INDEX
 277 #  ifdef NEED_DECLARATION_INDEX
 278 extern char *index ();
 279 #  endif
 280 # else /* ! HAVE_INDEX */
 281 #  define index strchr
 282 # endif
 283 #endif
 284
 285 #ifndef rindex
 286 # ifdef HAVE_RINDEX
 287 #  ifdef NEED_DECLARATION_RINDEX
 288 extern char *rindex ();
 289 #  endif
 290 # else /* ! HAVE_RINDEX */
 291 #  define rindex strrchr
 292 # endif
 293 #endif
 294
 295 #ifdef NEED_DECLARATION_ATOF
 296 extern double atof ();
 297 #endif
 298
 299 #ifdef NEED_DECLARATION_ATOL
 300 extern long atol();
 301 #endif
 302
 303 #ifdef NEED_DECLARATION_FREE
 304 extern void free ();
 305 #endif
 306
 307 #ifdef NEED_DECLARATION_GETCWD
 308 extern char *getcwd ();
 309 #endif
 310
 311 #ifdef NEED_DECLARATION_GETENV
 312 extern char *getenv ();
 313 #endif
 314
 315 #ifdef NEED_DECLARATION_GETWD
 316 extern char *getwd ();
 317 #endif
 318
 319 #ifdef NEED_DECLARATION_SBRK
 320 extern char *sbrk ();
 321 #endif
 322
 323 #ifdef HAVE_STRERROR
 324 # ifdef NEED_DECLARATION_STRERROR
 325 #  ifndef strerror
 326 extern char *strerror ();
 327 #  endif
 328 # endif
 329 #else /* ! HAVE_STRERROR */
 330 extern int sys_nerr;
 331 extern char *sys_errlist[];
 332 #endif /* HAVE_STRERROR */
 333
 334 #ifdef HAVE_STRSIGNAL
 335 # ifdef NEED_DECLARATION_STRSIGNAL
 336 #  ifndef strsignal
 337 extern char * strsignal ();
 338 #  endif
 339 # endif
 340 #else /* ! HAVE_STRSIGNAL */
 341 # ifndef SYS_SIGLIST_DECLARED
 342 #  ifndef NO_SYS_SIGLIST
 343 extern char * sys_siglist[];
 344 #  endif
 345 # endif
 346 #endif /* HAVE_STRSIGNAL */
 347
 348 #ifdef HAVE_GETRLIMIT
 349 # ifdef NEED_DECLARATION_GETRLIMIT
 350 #  ifndef getrlimit
 351 extern int getrlimit ();
 352 #  endif
 353 # endif
 354 #endif
 355
 356 #ifdef HAVE_SETRLIMIT
 357 # ifdef NEED_DECLARATION_SETRLIMIT
 358 #  ifndef setrlimit
 359 extern int setrlimit ();
 360 #  endif
 361 # endif
 362 #endif
 363
 364 /* HAVE_VOLATILE only refers to the stage1 compiler.  We also check
 365    __STDC__ and assume gcc sets it and has volatile in stage >=2. */
 366 #if !defined(HAVE_VOLATILE) && !defined(__STDC__) && !defined(volatile)
 367 #define volatile
 368 #endif
 369
 370 /* Redefine abort to report an internal error w/o coredump, and reporting the
 371    location of the error in the source file.  */
 372 #ifndef abort
 373 #ifndef __STDC__
 374 #ifndef __GNUC__
 375 #ifndef USE_SYSTEM_ABORT
 376 #define USE_SYSTEM_ABORT
 377 #endif /* !USE_SYSTEM_ABORT */
 378 #endif /* !__GNUC__ */
 379 #endif /* !__STDC__ */
 380
 381 #ifdef USE_SYSTEM_ABORT
 382 # ifdef NEED_DECLARATION_ABORT
 383 extern void abort ();
 384 # endif
 385 #else
 386 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
 387 #define abort()                                                         \
 388 (fprintf (stderr,                                                       \
 389           "%s:%d: Internal compiler error\n", __FILE__, __LINE__),      \
 390  exit (FATAL_EXIT_CODE))
 391
 392 #else
 393 #define abort()                                                         \
 394 (fprintf (stderr,                                                       \
 395           "%s:%d: Internal compiler error in function %s\n"             \
 396           "Please submit a full bug report to `egcs-bugs@egcs.cygnus.com'.\n"  \
 397           "See <URL:http://egcs.cygnus.com/faq.html#bugreport> for details.\n", \
 398           __FILE__, __LINE__, __PRETTY_FUNCTION__),                     \
 399  exit (FATAL_EXIT_CODE))
 400
 401 #endif /* recent gcc */
 402 #endif /* USE_SYSTEM_ABORT */
 403 #endif /* !abort */
 404
 405
 406 /* Define a STRINGIFY macro that's right for ANSI or traditional C.
 407    HAVE_CPP_STRINGIFY only refers to the stage1 compiler.  Assume that
 408    (non-traditional) gcc used in stage2 or later has this feature.
 409
 410    Note: if the argument passed to STRINGIFY is itself a macro, eg
 411    #define foo bar, STRINGIFY(foo) will produce "foo", not "bar".
 412    Although the __STDC__ case could be made to expand this via a layer
 413    of indirection, the traditional C case can not do so.  Therefore
 414    this behavior is not supported. */
 415 #ifndef STRINGIFY
 416 # if defined(HAVE_CPP_STRINGIFY) || (defined(__GNUC__) && defined(__STDC__))
 417 #  define STRINGIFY(STRING) #STRING
 418 # else
 419 #  define STRINGIFY(STRING) "STRING"
 420 # endif
 421 #endif /* ! STRINGIFY */
 422
 423 #if HAVE_SYS_STAT_H
 424 # include <sys/stat.h>
 425 #endif
 426
 427 /* Test if something is a normal file.  */
 428 #ifndef S_ISREG
 429 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 430 #endif
 431
 432 /* Test if something is a directory.  */
 433 #ifndef S_ISDIR
 434 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 435 #endif
 436
 437 /* Test if something is a character special file.  */
 438 #ifndef S_ISCHR
 439 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 440 #endif
 441
 442 /* Test if something is a socket.  */
 443 #ifndef S_ISSOCK
 444 # ifdef S_IFSOCK
 445 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 446 # else
 447 #   define S_ISSOCK(m) 0
 448 # endif
 449 #endif
 450
 451 /* Test if something is a FIFO.  */
 452 #ifndef S_ISFIFO
 453 # ifdef S_IFIFO
 454 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 455 # else
 456 #  define S_ISFIFO(m) 0
 457 # endif
 458 #endif
 459
 460 /* Approximate O_NONBLOCK.  */
 461 #ifndef O_NONBLOCK
 462 #define O_NONBLOCK O_NDELAY
 463 #endif
 464
 465 /* Approximate O_NOCTTY.  */
 466 #ifndef O_NOCTTY
 467 #define O_NOCTTY 0
 468 #endif
 469
 470 /* Get libiberty declarations. */
 471 #include "libiberty.h"
 472
 473 #endif /* __GCC_SYSTEM_H__ */