gcc/system.h

   1 /* Get common system includes and various definitions and declarations based
   2    on autoconf macros.
   3    Copyright (C) 1998, 1999, 2000 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
  23 #ifndef __GCC_SYSTEM_H__
  24 #define __GCC_SYSTEM_H__
  25
  26 /* This is the location of the online document giving information how
  27    to report bugs. If you change this string, also check for strings
  28    not under control of the preprocessor.  */
  29 #define GCCBUGURL "<URL:http://www.gnu.org/software/gcc/bugs.html>"
  30
  31 /* We must include stdarg.h/varargs.h before stdio.h. */
  32 #ifdef ANSI_PROTOTYPES
  33 #include <stdarg.h>
  34 #else
  35 #include <varargs.h>
  36 #endif
  37
  38 #ifndef va_copy
  39 # ifdef __va_copy
  40 #   define va_copy(d,s)  __va_copy((d),(s))
  41 # else
  42 #   define va_copy(d,s)  ((d) = (s))
  43 # endif
  44 #endif
  45
  46 #include <stdio.h>
  47
  48 /* Define a generic NULL if one hasn't already been defined.  */
  49 #ifndef NULL
  50 #define NULL 0
  51 #endif
  52
  53 /* The compiler is not a multi-threaded application and therefore we
  54    do not have to use the locking functions.
  55
  56    NEED_DECLARATION_PUTC_UNLOCKED actually indicates whether or not
  57    the IO code is multi-thread safe by default.  If it is not declared,
  58    then do not worry about using the _unlocked functions.
  59
  60    fputs_unlocked is an extension and needs to be prototyped specially.  */
  61
  62 #if defined HAVE_PUTC_UNLOCKED && !defined NEED_DECLARATION_PUTC_UNLOCKED
  63 # undef putc
  64 # define putc(C, Stream) putc_unlocked (C, Stream)
  65 #endif
  66 #if defined HAVE_FPUTC_UNLOCKED && !defined NEED_DECLARATION_PUTC_UNLOCKED
  67 # undef fputc
  68 # define fputc(C, Stream) fputc_unlocked (C, Stream)
  69 #endif
  70 #if defined HAVE_FPUTS_UNLOCKED && !defined NEED_DECLARATION_PUTC_UNLOCKED
  71 # undef fputs
  72 # define fputs(String, Stream) fputs_unlocked (String, Stream)
  73 # ifdef NEED_DECLARATION_FPUTS_UNLOCKED
  74 extern int fputs_unlocked PARAMS ((const char *, FILE *));
  75 # endif
  76 #endif
  77
  78 #include <ctype.h>
  79
  80 /* Jim Meyering writes:
  81
  82    "... Some ctype macros are valid only for character codes that
  83    isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
  84    using /bin/cc or gcc but without giving an ansi option).  So, all
  85    ctype uses should be through macros like ISPRINT...  If
  86    STDC_HEADERS is defined, then autoconf has verified that the ctype
  87    macros don't need to be guarded with references to isascii. ...
  88    Defining isascii to 1 should let any compiler worth its salt
  89    eliminate the && through constant folding."
  90
  91    Bruno Haible adds:
  92
  93    "... Furthermore, isupper(c) etc. have an undefined result if c is
  94    outside the range -1 <= c <= 255. One is tempted to write isupper(c)
  95    with c being of type `char', but this is wrong if c is an 8-bit
  96    character >= 128 which gets sign-extended to a negative value.
  97    The macro ISUPPER protects against this as well."  */
  98
  99 #if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII)) || defined(HOST_EBCDIC)
 100 # define IN_CTYPE_DOMAIN(c) 1
 101 #else
 102 # define IN_CTYPE_DOMAIN(c) isascii(c)
 103 #endif
 104
 105 /* The ctype functions are often implemented as macros which do
 106    lookups in arrays using the parameter as the offset.  If the ctype
 107    function parameter is a char, then gcc will (appropriately) warn
 108    that a "subscript has type char".  Using a (signed) char as a subscript
 109    is bad because you may get negative offsets and thus it is not 8-bit
 110    safe.  The CTYPE_CONV macro ensures that the parameter is cast to an
 111    unsigned char when a char is passed in.  When an int is passed in, the
 112    parameter is left alone so we don't lose EOF.
 113 */
 114
 115 #define CTYPE_CONV(CH) \
 116   (sizeof(CH) == sizeof(unsigned char) ? (int)(unsigned char)(CH) : (int)(CH))
 117
 118
 119 /* WARNING!  The argument to the ctype replacement macros below is
 120    evaluated more than once so it must not have side effects!  */
 121
 122 #ifdef isblank
 123 # define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (CTYPE_CONV(c)))
 124 #else
 125 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
 126 #endif
 127 #ifdef isgraph
 128 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (CTYPE_CONV(c)))
 129 #else
 130 # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (CTYPE_CONV(c)) && !isspace (CTYPE_CONV(c)))
 131 #endif
 132
 133 #define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (CTYPE_CONV(c)))
 134 #define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (CTYPE_CONV(c)))
 135 #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (CTYPE_CONV(c)))
 136 #define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (CTYPE_CONV(c)))
 137 #define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (CTYPE_CONV(c)))
 138 #define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (CTYPE_CONV(c)))
 139 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (CTYPE_CONV(c)))
 140 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (CTYPE_CONV(c)))
 141 #define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (CTYPE_CONV(c)))
 142 #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (CTYPE_CONV(c)))
 143
 144 #if STDC_HEADERS
 145 # define TOLOWER(c) (tolower (CTYPE_CONV(c)))
 146 # define TOUPPER(c) (toupper (CTYPE_CONV(c)))
 147 #else
 148 # define TOLOWER(c) (ISUPPER (c) ? tolower (CTYPE_CONV(c)) : (c))
 149 # define TOUPPER(c) (ISLOWER (c) ? toupper (CTYPE_CONV(c)) : (c))
 150 #endif
 151
 152 /* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
 153    - Its arg may be any int or unsigned int; it need not be an unsigned char.
 154    - It's guaranteed to evaluate its argument exactly once.
 155    - It's typically faster.
 156    Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
 157    only '0' through '9' are digits.  Prefer ISDIGIT to ISDIGIT_LOCALE unless
 158    it's important to use the locale's definition of `digit' even when the
 159    host does not conform to Posix.  */
 160 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
 161
 162 /* Define a default escape character; its different for EBCDIC.  */
 163 #ifndef TARGET_ESC
 164 #define TARGET_ESC 033
 165 #endif
 166
 167 #include <sys/types.h>
 168
 169 #include <errno.h>
 170
 171 #ifndef errno
 172 extern int errno;
 173 #endif
 174
 175 #ifdef STRING_WITH_STRINGS
 176 # include <string.h>
 177 # include <strings.h>
 178 #else
 179 # ifdef HAVE_STRING_H
 180 #  include <string.h>
 181 # else
 182 #  ifdef HAVE_STRINGS_H
 183 #   include <strings.h>
 184 #  endif
 185 # endif
 186 #endif
 187
 188 #ifdef HAVE_STDLIB_H
 189 # include <stdlib.h>
 190 # ifdef USE_C_ALLOCA
 191 /* Note that systems that use glibc have a <stdlib.h> that includes
 192    <alloca.h> that defines alloca, so let USE_C_ALLOCA override this. */
 193 # undef alloca
 194 #endif
 195 #endif
 196
 197 #ifdef HAVE_UNISTD_H
 198 # include <unistd.h>
 199 #endif
 200
 201 #ifdef HAVE_SYS_PARAM_H
 202 # include <sys/param.h>
 203 #endif
 204
 205 #if HAVE_LIMITS_H
 206 # include <limits.h>
 207 #endif
 208
 209 /* Find HOST_WIDEST_INT and set its bit size, type and print macros.
 210    It will be the largest integer mode supported by the host which may
 211    (or may not) be larger than HOST_WIDE_INT.  This must appear after
 212    <limits.h> since we only use `long long' if its bigger than a
 213    `long' and also if it is supported by macros in limits.h.  For old
 214    hosts which don't have a limits.h (and thus won't include it in
 215    stage2 cause we don't rerun configure) we assume gcc supports long
 216    long.)  Note, you won't get these defined if you don't include
 217    {ht}config.h before this file to set the HOST_BITS_PER_* macros. */
 218
 219 #ifndef HOST_WIDEST_INT
 220 # if defined (HOST_BITS_PER_LONG) && defined (HOST_BITS_PER_LONGLONG)
 221 #  if (HOST_BITS_PER_LONGLONG > HOST_BITS_PER_LONG) && (defined (LONG_LONG_MAX) || defined (LONGLONG_MAX) || defined (LLONG_MAX) || defined (__GNUC__))
 222 #   define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER_LONGLONG
 223 #   define HOST_WIDEST_INT long long
 224 #   define HOST_WIDEST_INT_PRINT_DEC "%lld"
 225 #   define HOST_WIDEST_INT_PRINT_UNSIGNED "%llu"
 226 #   define HOST_WIDEST_INT_PRINT_HEX "0x%llx"
 227 #  else
 228 #   define HOST_BITS_PER_WIDEST_INT HOST_BITS_PER_LONG
 229 #   define HOST_WIDEST_INT long
 230 #   define HOST_WIDEST_INT_PRINT_DEC "%ld"
 231 #   define HOST_WIDEST_INT_PRINT_UNSIGNED "%lu"
 232 #   define HOST_WIDEST_INT_PRINT_HEX "0x%lx"
 233 #  endif /*(long long>long) && (LONG_LONG_MAX||LONGLONG_MAX||LLONG_MAX||GNUC)*/
 234 # endif /* defined(HOST_BITS_PER_LONG) && defined(HOST_BITS_PER_LONGLONG) */
 235 #endif /* ! HOST_WIDEST_INT */
 236
 237 #ifdef TIME_WITH_SYS_TIME
 238 # include <sys/time.h>
 239 # include <time.h>
 240 #else
 241 # if HAVE_SYS_TIME_H
 242 #  include <sys/time.h>
 243 # else
 244 #  ifdef HAVE_TIME_H
 245 #   include <time.h>
 246 #  endif
 247 # endif
 248 #endif
 249
 250 #ifdef HAVE_FCNTL_H
 251 # include <fcntl.h>
 252 #else
 253 # ifdef HAVE_SYS_FILE_H
 254 #  include <sys/file.h>
 255 # endif
 256 #endif
 257
 258 #ifndef SEEK_SET
 259 # define SEEK_SET 0
 260 # define SEEK_CUR 1
 261 # define SEEK_END 2
 262 #endif
 263 #ifndef F_OK
 264 # define F_OK 0
 265 # define X_OK 1
 266 # define W_OK 2
 267 # define R_OK 4
 268 #endif
 269 #ifndef O_RDONLY
 270 # define O_RDONLY 0
 271 #endif
 272 #ifndef O_WRONLY
 273 # define O_WRONLY 1
 274 #endif
 275
 276 /* Some systems define these in, e.g., param.h.  We undefine these names
 277    here to avoid the warnings.  We prefer to use our definitions since we
 278    know they are correct.  */
 279
 280 #undef MIN
 281 #undef MAX
 282 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 283 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 284
 285 /* Returns the least number N such that N * Y >= X.  */
 286 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 287
 288 #ifdef HAVE_SYS_WAIT_H
 289 #include <sys/wait.h>
 290 #endif
 291
 292 #ifndef WIFSIGNALED
 293 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 294 #endif
 295 #ifndef WTERMSIG
 296 #define WTERMSIG(S) ((S) & 0x7f)
 297 #endif
 298 #ifndef WIFEXITED
 299 #define WIFEXITED(S) (((S) & 0xff) == 0)
 300 #endif
 301 #ifndef WEXITSTATUS
 302 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 303 #endif
 304 #ifndef WSTOPSIG
 305 #define WSTOPSIG WEXITSTATUS
 306 #endif
 307
 308
 309
 310 #ifndef bcopy
 311 # ifdef HAVE_BCOPY
 312 #  ifdef NEED_DECLARATION_BCOPY
 313 extern void bcopy PARAMS ((const PTR, PTR, size_t));
 314 #  endif
 315 # else /* ! HAVE_BCOPY */
 316 #  define bcopy(src,dst,len) memmove((dst),(src),(len))
 317 # endif
 318 #endif
 319
 320 #ifndef bcmp
 321 # ifdef HAVE_BCMP
 322 #  ifdef NEED_DECLARATION_BCMP
 323 extern int bcmp PARAMS ((const PTR, const PTR, size_t));
 324 #  endif
 325 # else /* ! HAVE_BCMP */
 326 #  define bcmp(left,right,len) memcmp ((left),(right),(len))
 327 # endif
 328 #endif
 329
 330 #ifndef bzero
 331 # ifdef HAVE_BZERO
 332 #  ifdef NEED_DECLARATION_BZERO
 333 extern void bzero PARAMS ((PTR, size_t));
 334 #  endif
 335 # else /* ! HAVE_BZERO */
 336 #  define bzero(dst,len) memset ((dst),0,(len))
 337 # endif
 338 #endif
 339
 340 #ifndef index
 341 # ifdef HAVE_INDEX
 342 #  ifdef NEED_DECLARATION_INDEX
 343 extern char *index PARAMS ((const char *, int));
 344 #  endif
 345 # else /* ! HAVE_INDEX */
 346 #  define index strchr
 347 # endif
 348 #endif
 349
 350 #ifndef rindex
 351 # ifdef HAVE_RINDEX
 352 #  ifdef NEED_DECLARATION_RINDEX
 353 extern char *rindex PARAMS ((const char *, int));
 354 #  endif
 355 # else /* ! HAVE_RINDEX */
 356 #  define rindex strrchr
 357 # endif
 358 #endif
 359
 360 #ifdef NEED_DECLARATION_ATOF
 361 extern double atof PARAMS ((const char *));
 362 #endif
 363
 364 #ifdef NEED_DECLARATION_ATOL
 365 extern long atol PARAMS ((const char *));
 366 #endif
 367
 368 #ifdef NEED_DECLARATION_FREE
 369 extern void free PARAMS ((PTR));
 370 #endif
 371
 372 #ifdef NEED_DECLARATION_GETCWD
 373 extern char *getcwd PARAMS ((char *, size_t));
 374 #endif
 375
 376 #ifdef NEED_DECLARATION_GETENV
 377 extern char *getenv PARAMS ((const char *));
 378 #endif
 379
 380 #ifdef NEED_DECLARATION_GETWD
 381 extern char *getwd PARAMS ((char *));
 382 #endif
 383
 384 #ifdef NEED_DECLARATION_SBRK
 385 extern PTR sbrk PARAMS ((int));
 386 #endif
 387
 388 #ifdef NEED_DECLARATION_STRSTR
 389 extern char *strstr PARAMS ((const char *, const char *));
 390 #endif
 391
 392 #ifdef HAVE_MALLOC_H
 393 #include <malloc.h>
 394 #endif
 395
 396 #ifdef NEED_DECLARATION_MALLOC
 397 extern PTR malloc PARAMS ((size_t));
 398 #endif
 399
 400 #ifdef NEED_DECLARATION_CALLOC
 401 extern PTR calloc PARAMS ((size_t, size_t));
 402 #endif
 403
 404 #ifdef NEED_DECLARATION_REALLOC
 405 extern PTR realloc PARAMS ((PTR, size_t));
 406 #endif
 407
 408 /* If the system doesn't provide strsignal, we get it defined in
 409    libiberty but no declaration is supplied. */
 410 #ifdef NEED_DECLARATION_STRSIGNAL
 411 # ifndef strsignal
 412 extern const char *strsignal PARAMS ((int));
 413 # endif
 414 #endif
 415
 416 #ifdef HAVE_GETRLIMIT
 417 # ifdef NEED_DECLARATION_GETRLIMIT
 418 #  ifndef getrlimit
 419 #   ifdef ANSI_PROTOTYPES
 420 struct rlimit;
 421 #   endif
 422 extern int getrlimit PARAMS ((int, struct rlimit *));
 423 #  endif
 424 # endif
 425 #endif
 426
 427 #ifdef HAVE_SETRLIMIT
 428 # ifdef NEED_DECLARATION_SETRLIMIT
 429 #  ifndef setrlimit
 430 #   ifdef ANSI_PROTOTYPES
 431 struct rlimit;
 432 #   endif
 433 extern int setrlimit PARAMS ((int, const struct rlimit *));
 434 #  endif
 435 # endif
 436 #endif
 437
 438 /* HAVE_VOLATILE only refers to the stage1 compiler.  We also check
 439    __STDC__ and assume gcc sets it and has volatile in stage >=2. */
 440 #if !defined(HAVE_VOLATILE) && !defined(__STDC__) && !defined(volatile)
 441 #define volatile
 442 #endif
 443
 444 #ifdef NEED_DECLARATION_ABORT
 445 extern void abort PARAMS ((void));
 446 #endif
 447
 448 /* Define a STRINGIFY macro that's right for ANSI or traditional C.
 449    Note: if the argument passed to STRINGIFY is itself a macro, eg
 450    #define foo bar, STRINGIFY(foo) will produce "foo", not "bar".
 451    Although the __STDC__ case could be made to expand this via a layer
 452    of indirection, the traditional C case can not do so.  Therefore
 453    this behavior is not supported. */
 454 #ifndef STRINGIFY
 455 # ifdef HAVE_STRINGIZE
 456 #  define STRINGIFY(STRING) #STRING
 457 # else
 458 #  define STRINGIFY(STRING) "STRING"
 459 # endif
 460 #endif /* ! STRINGIFY */
 461
 462 #if HAVE_SYS_STAT_H
 463 # include <sys/stat.h>
 464 #endif
 465
 466 /* Test if something is a normal file.  */
 467 #ifndef S_ISREG
 468 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 469 #endif
 470
 471 /* Test if something is a directory.  */
 472 #ifndef S_ISDIR
 473 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 474 #endif
 475
 476 /* Test if something is a character special file.  */
 477 #ifndef S_ISCHR
 478 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 479 #endif
 480
 481 /* Test if something is a block special file.  */
 482 #ifndef S_ISBLK
 483 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 484 #endif
 485
 486 /* Test if something is a socket.  */
 487 #ifndef S_ISSOCK
 488 # ifdef S_IFSOCK
 489 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 490 # else
 491 #   define S_ISSOCK(m) 0
 492 # endif
 493 #endif
 494
 495 /* Test if something is a FIFO.  */
 496 #ifndef S_ISFIFO
 497 # ifdef S_IFIFO
 498 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 499 # else
 500 #  define S_ISFIFO(m) 0
 501 # endif
 502 #endif
 503
 504 /* Approximate O_NONBLOCK.  */
 505 #ifndef O_NONBLOCK
 506 #define O_NONBLOCK O_NDELAY
 507 #endif
 508
 509 /* Approximate O_NOCTTY.  */
 510 #ifndef O_NOCTTY
 511 #define O_NOCTTY 0
 512 #endif
 513
 514 /* Define well known filenos if the system does not define them.  */
 515 #ifndef STDIN_FILENO
 516 # define STDIN_FILENO   0
 517 #endif
 518 #ifndef STDOUT_FILENO
 519 # define STDOUT_FILENO  1
 520 #endif
 521 #ifndef STDERR_FILENO
 522 # define STDERR_FILENO  2
 523 #endif
 524
 525 /* Some systems have mkdir that takes a single argument. */
 526 #ifdef MKDIR_TAKES_ONE_ARG
 527 # define mkdir(a,b) mkdir(a)
 528 #endif
 529
 530 /* Provide a way to print an address via printf.  */
 531 #ifndef HOST_PTR_PRINTF
 532 # ifdef HAVE_PRINTF_PTR
 533 #  define HOST_PTR_PRINTF "%p"
 534 # else
 535 #  define HOST_PTR_PRINTF \
 536     (sizeof (int) == sizeof (char *) ? "%x" \
 537      : sizeof (long) == sizeof (char *) ? "%lx" : "%llx")
 538 # endif
 539 #endif /* ! HOST_PTR_PRINTF */
 540
 541 /* By default, colon separates directories in a path.  */
 542 #ifndef PATH_SEPARATOR
 543 #define PATH_SEPARATOR ':'
 544 #endif
 545
 546 #ifndef DIR_SEPARATOR
 547 #define DIR_SEPARATOR '/'
 548 #endif
 549
 550 /* Define IS_DIR_SEPARATOR.  */
 551 #ifndef DIR_SEPARATOR_2
 552 # define IS_DIR_SEPARATOR(ch) ((ch) == DIR_SEPARATOR)
 553 #else /* DIR_SEPARATOR_2 */
 554 # define IS_DIR_SEPARATOR(ch) \
 555         (((ch) == DIR_SEPARATOR) || ((ch) == DIR_SEPARATOR_2))
 556 #endif /* DIR_SEPARATOR_2 */
 557
 558 /* Get libiberty declarations. */
 559 #include "libiberty.h"
 560
 561 /* Make sure that ONLY_INT_FIELDS has an integral value.  */
 562 #ifdef ONLY_INT_FIELDS
 563 #undef ONLY_INT_FIELDS
 564 #define ONLY_INT_FIELDS 1
 565 #else
 566 #define ONLY_INT_FIELDS 0
 567 #endif
 568
 569 /* Enumerated bitfields are safe to use unless we've been explictly told
 570    otherwise or if they are signed. */
 571
 572 #define USE_ENUM_BITFIELDS (__GNUC__ || (!ONLY_INT_FIELDS && ENUM_BITFIELDS_ARE_UNSIGNED))
 573
 574 #if USE_ENUM_BITFIELDS
 575 #define ENUM_BITFIELD(TYPE) enum TYPE
 576 #else
 577 #define ENUM_BITFIELD(TYPE) unsigned int
 578 #endif
 579
 580
 581 #endif /* __GCC_SYSTEM_H__ */