gcc/system.h

   1 /* Get common system includes and various definitions and declarations based
   2    on autoconf macros.
   3    Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 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 #ifdef HAVE_STDDEF_H
  47 # include <stddef.h>
  48 #endif
  49
  50 #include <stdio.h>
  51
  52 /* Define a generic NULL if one hasn't already been defined.  */
  53 #ifndef NULL
  54 #define NULL 0
  55 #endif
  56
  57 /* The compiler is not a multi-threaded application and therefore we
  58    do not have to use the locking functions.  In fact, using the locking
  59    functions can cause the compiler to be significantly slower under
  60    I/O bound conditions (such as -g -O0 on very large source files).
  61
  62    HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
  63    code is multi-thread safe by default.  If it is set to 0, then do
  64    not worry about using the _unlocked functions.
  65
  66    fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
  67    extensions and need to be prototyped by hand (since we do not
  68    define _GNU_SOURCE).  */
  69
  70 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
  71
  72 # ifdef HAVE_PUTC_UNLOCKED
  73 #  undef putc
  74 #  define putc(C, Stream) putc_unlocked (C, Stream)
  75 # endif
  76 # ifdef HAVE_FPUTC_UNLOCKED
  77 #  undef fputc
  78 #  define fputc(C, Stream) fputc_unlocked (C, Stream)
  79 # endif
  80
  81 # ifdef HAVE_FPUTS_UNLOCKED
  82 #  undef fputs
  83 #  define fputs(String, Stream) fputs_unlocked (String, Stream)
  84 #  if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
  85 extern int fputs_unlocked PARAMS ((const char *, FILE *));
  86 #  endif
  87 # endif
  88 # ifdef HAVE_FWRITE_UNLOCKED
  89 #  undef fwrite
  90 #  define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
  91 #  if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
  92 extern int fwrite_unlocked PARAMS ((const PTR, size_t, size_t, FILE *));
  93 #  endif
  94 # endif
  95 # ifdef HAVE_FPRINTF_UNLOCKED
  96 #  undef fprintf
  97 /* We can't use a function-like macro here because we don't know if
  98    we have varargs macros.  */
  99 #  define fprintf fprintf_unlocked
 100 #  if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
 101 extern int fprintf_unlocked PARAMS ((FILE *, const char *, ...));
 102 #  endif
 103 # endif
 104
 105 #endif
 106
 107 /* There are an extraordinary number of issues with <ctype.h>.
 108    The last straw is that it varies with the locale.  Use libiberty's
 109    replacement instead.  */
 110 #include <safe-ctype.h>
 111
 112 #include <sys/types.h>
 113
 114 #include <errno.h>
 115
 116 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 117 extern int errno;
 118 #endif
 119
 120 #ifdef STRING_WITH_STRINGS
 121 # include <string.h>
 122 # include <strings.h>
 123 #else
 124 # ifdef HAVE_STRING_H
 125 #  include <string.h>
 126 # else
 127 #  ifdef HAVE_STRINGS_H
 128 #   include <strings.h>
 129 #  endif
 130 # endif
 131 #endif
 132
 133 #ifdef HAVE_STDLIB_H
 134 # include <stdlib.h>
 135 #endif
 136
 137 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
 138    FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
 139    or 0 and 1 if those macros are not defined.  */
 140 #ifndef SUCCESS_EXIT_CODE
 141 # ifdef EXIT_SUCCESS
 142 #  define SUCCESS_EXIT_CODE EXIT_SUCCESS
 143 # else
 144 #  define SUCCESS_EXIT_CODE 0
 145 # endif
 146 #endif
 147
 148 #ifndef FATAL_EXIT_CODE
 149 # ifdef EXIT_FAILURE
 150 #  define FATAL_EXIT_CODE EXIT_FAILURE
 151 # else
 152 #  define FATAL_EXIT_CODE 1
 153 # endif
 154 #endif
 155
 156 #ifdef HAVE_UNISTD_H
 157 # include <unistd.h>
 158 #endif
 159
 160 #ifdef HAVE_SYS_PARAM_H
 161 # include <sys/param.h>
 162 #endif
 163
 164 #if HAVE_LIMITS_H
 165 # include <limits.h>
 166 #endif
 167
 168 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT.  */
 169 #include "hwint.h"
 170
 171 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 172    macros defined with these cannot be used in #if.  */
 173
 174 /* The extra casts work around common compiler bugs.  */
 175 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 176 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 177    It is necessary at least when t == time_t.  */
 178 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 179                              ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
 180 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 181
 182 /* Use that infrastructure to provide a few constants.  */
 183 #ifndef UCHAR_MAX
 184 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 185 #endif
 186
 187 #ifdef TIME_WITH_SYS_TIME
 188 # include <sys/time.h>
 189 # include <time.h>
 190 #else
 191 # if HAVE_SYS_TIME_H
 192 #  include <sys/time.h>
 193 # else
 194 #  ifdef HAVE_TIME_H
 195 #   include <time.h>
 196 #  endif
 197 # endif
 198 #endif
 199
 200 #ifdef HAVE_FCNTL_H
 201 # include <fcntl.h>
 202 #else
 203 # ifdef HAVE_SYS_FILE_H
 204 #  include <sys/file.h>
 205 # endif
 206 #endif
 207
 208 #ifndef SEEK_SET
 209 # define SEEK_SET 0
 210 # define SEEK_CUR 1
 211 # define SEEK_END 2
 212 #endif
 213 #ifndef F_OK
 214 # define F_OK 0
 215 # define X_OK 1
 216 # define W_OK 2
 217 # define R_OK 4
 218 #endif
 219 #ifndef O_RDONLY
 220 # define O_RDONLY 0
 221 #endif
 222 #ifndef O_WRONLY
 223 # define O_WRONLY 1
 224 #endif
 225
 226 /* Some systems define these in, e.g., param.h.  We undefine these names
 227    here to avoid the warnings.  We prefer to use our definitions since we
 228    know they are correct.  */
 229
 230 #undef MIN
 231 #undef MAX
 232 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 233 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 234
 235 /* Returns the least number N such that N * Y >= X.  */
 236 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 237
 238 #ifdef HAVE_SYS_WAIT_H
 239 #include <sys/wait.h>
 240 #endif
 241
 242 #ifndef WIFSIGNALED
 243 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 244 #endif
 245 #ifndef WTERMSIG
 246 #define WTERMSIG(S) ((S) & 0x7f)
 247 #endif
 248 #ifndef WIFEXITED
 249 #define WIFEXITED(S) (((S) & 0xff) == 0)
 250 #endif
 251 #ifndef WEXITSTATUS
 252 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 253 #endif
 254 #ifndef WSTOPSIG
 255 #define WSTOPSIG WEXITSTATUS
 256 #endif
 257
 258 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 259    are defined to 0 then we must provide the relevant declaration
 260    here.  These checks will be in the undefined state while configure
 261    is running so be careful to test "defined (HAVE_DECL_*)".  */
 262
 263 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 264 extern double atof PARAMS ((const char *));
 265 #endif
 266
 267 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 268 extern long atol PARAMS ((const char *));
 269 #endif
 270
 271 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 272 extern void free PARAMS ((PTR));
 273 #endif
 274
 275 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 276 extern char *getcwd PARAMS ((char *, size_t));
 277 #endif
 278
 279 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 280 extern char *getenv PARAMS ((const char *));
 281 #endif
 282
 283 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 284 extern int getopt PARAMS ((int, char * const *, const char *));
 285 #endif
 286
 287 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 288 extern char *getwd PARAMS ((char *));
 289 #endif
 290
 291 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 292 extern PTR sbrk PARAMS ((int));
 293 #endif
 294
 295 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 296 extern char *strstr PARAMS ((const char *, const char *));
 297 #endif
 298
 299 #ifdef HAVE_MALLOC_H
 300 #include <malloc.h>
 301 #endif
 302
 303 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 304 extern PTR malloc PARAMS ((size_t));
 305 #endif
 306
 307 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 308 extern PTR calloc PARAMS ((size_t, size_t));
 309 #endif
 310
 311 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 312 extern PTR realloc PARAMS ((PTR, size_t));
 313 #endif
 314
 315 /* If the system doesn't provide strsignal, we get it defined in
 316    libiberty but no declaration is supplied.  */
 317 #ifndef HAVE_STRSIGNAL
 318 # ifndef strsignal
 319 extern const char *strsignal PARAMS ((int));
 320 # endif
 321 #endif
 322
 323 #ifdef HAVE_GETRLIMIT
 324 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 325 #  ifndef getrlimit
 326 #   ifdef ANSI_PROTOTYPES
 327 struct rlimit;
 328 #   endif
 329 extern int getrlimit PARAMS ((int, struct rlimit *));
 330 #  endif
 331 # endif
 332 #endif
 333
 334 #ifdef HAVE_SETRLIMIT
 335 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 336 #  ifndef setrlimit
 337 #   ifdef ANSI_PROTOTYPES
 338 struct rlimit;
 339 #   endif
 340 extern int setrlimit PARAMS ((int, const struct rlimit *));
 341 #  endif
 342 # endif
 343 #endif
 344
 345 /* HAVE_VOLATILE only refers to the stage1 compiler.  We also check
 346    __STDC__ and assume gcc sets it and has volatile in stage >=2.  */
 347 #if !defined(HAVE_VOLATILE) && !defined(__STDC__) && !defined(volatile)
 348 #define volatile
 349 #endif
 350
 351 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 352 extern void abort PARAMS ((void));
 353 #endif
 354
 355 /* 1 if we have C99 designated initializers.  */
 356 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 357 #define HAVE_DESIGNATED_INITIALIZERS \
 358   ((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L))
 359 #endif
 360
 361 /* 1 if we have _Bool.  */
 362 #ifndef HAVE__BOOL
 363 # define HAVE__BOOL \
 364    ((GCC_VERSION >= 3000) || (__STDC_VERSION__ >= 199901L))
 365 #endif
 366
 367
 368 #if HAVE_SYS_STAT_H
 369 # include <sys/stat.h>
 370 #endif
 371
 372 /* Test if something is a normal file.  */
 373 #ifndef S_ISREG
 374 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 375 #endif
 376
 377 /* Test if something is a directory.  */
 378 #ifndef S_ISDIR
 379 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 380 #endif
 381
 382 /* Test if something is a character special file.  */
 383 #ifndef S_ISCHR
 384 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 385 #endif
 386
 387 /* Test if something is a block special file.  */
 388 #ifndef S_ISBLK
 389 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 390 #endif
 391
 392 /* Test if something is a socket.  */
 393 #ifndef S_ISSOCK
 394 # ifdef S_IFSOCK
 395 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 396 # else
 397 #   define S_ISSOCK(m) 0
 398 # endif
 399 #endif
 400
 401 /* Test if something is a FIFO.  */
 402 #ifndef S_ISFIFO
 403 # ifdef S_IFIFO
 404 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 405 # else
 406 #  define S_ISFIFO(m) 0
 407 # endif
 408 #endif
 409
 410 /* Approximate O_NONBLOCK.  */
 411 #ifndef O_NONBLOCK
 412 #define O_NONBLOCK O_NDELAY
 413 #endif
 414
 415 /* Approximate O_NOCTTY.  */
 416 #ifndef O_NOCTTY
 417 #define O_NOCTTY 0
 418 #endif
 419
 420 /* Define well known filenos if the system does not define them.  */
 421 #ifndef STDIN_FILENO
 422 # define STDIN_FILENO   0
 423 #endif
 424 #ifndef STDOUT_FILENO
 425 # define STDOUT_FILENO  1
 426 #endif
 427 #ifndef STDERR_FILENO
 428 # define STDERR_FILENO  2
 429 #endif
 430
 431 /* Some systems have mkdir that takes a single argument.  */
 432 #ifdef MKDIR_TAKES_ONE_ARG
 433 # define mkdir(a,b) mkdir(a)
 434 #endif
 435
 436 /* Provide a way to print an address via printf.  */
 437 #ifndef HOST_PTR_PRINTF
 438 # ifdef HAVE_PRINTF_PTR
 439 #  define HOST_PTR_PRINTF "%p"
 440 # else
 441 #  define HOST_PTR_PRINTF \
 442     (sizeof (int) == sizeof (char *) ? "%x" \
 443      : sizeof (long) == sizeof (char *) ? "%lx" : "%llx")
 444 # endif
 445 #endif /* ! HOST_PTR_PRINTF */
 446
 447 /* By default, colon separates directories in a path.  */
 448 #ifndef PATH_SEPARATOR
 449 #define PATH_SEPARATOR ':'
 450 #endif
 451
 452 #ifndef DIR_SEPARATOR
 453 #define DIR_SEPARATOR '/'
 454 #endif
 455
 456 /* Define IS_DIR_SEPARATOR.  */
 457 #ifndef DIR_SEPARATOR_2
 458 # define IS_DIR_SEPARATOR(CH) ((CH) == DIR_SEPARATOR)
 459 #else /* DIR_SEPARATOR_2 */
 460 # define IS_DIR_SEPARATOR(CH) \
 461         (((CH) == DIR_SEPARATOR) || ((CH) == DIR_SEPARATOR_2))
 462 #endif /* DIR_SEPARATOR_2 */
 463
 464 /* Say how to test for an absolute pathname.  On Unix systems, this is if
 465    it starts with a leading slash or a '$', the latter meaning the value of
 466    an environment variable is to be used.  On machien with DOS-based
 467    file systems, it is also absolute if it starts with a drive identifier.  */
 468 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 469 #define IS_ABSOLUTE_PATHNAME(STR) \
 470   (IS_DIR_SEPARATOR ((STR)[0]) || (STR)[0] == '$' \
 471    || ((STR)[0] != '\0' && (STR)[1] == ':' && IS_DIR_SEPARATOR ((STR)[2])))
 472 #else
 473 #define IS_ABSOLUTE_PATHNAME(STR) \
 474   (IS_DIR_SEPARATOR ((STR)[0]) || (STR)[0] == '$')
 475 #endif
 476
 477 /* Get libiberty declarations.  */
 478 #include "libiberty.h"
 479 #include "symcat.h"
 480
 481 /* Provide a default for the HOST_BIT_BUCKET.
 482    This suffices for POSIX-like hosts.  */
 483
 484 #ifndef HOST_BIT_BUCKET
 485 #define HOST_BIT_BUCKET "/dev/null"
 486 #endif
 487
 488 /* Be conservative and only use enum bitfields with GCC.
 489    FIXME: provide a complete autoconf test for buggy enum bitfields.  */
 490
 491 #if (GCC_VERSION > 2000)
 492 #define ENUM_BITFIELD(TYPE) enum TYPE
 493 #else
 494 #define ENUM_BITFIELD(TYPE) unsigned int
 495 #endif
 496
 497 #ifndef offsetof
 498 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *)0)->MEMBER)
 499 #endif
 500
 501 /* Traditional C cannot initialize union members of structs.  Provide
 502    a macro which expands appropriately to handle it.  This only works
 503    if you intend to initalize the union member to zero since it relies
 504    on default initialization to zero in the traditional C case.  */
 505 #ifdef __STDC__
 506 #define UNION_INIT_ZERO , {0}
 507 #else
 508 #define UNION_INIT_ZERO
 509 #endif
 510
 511 /* Various error reporting routines want to use __FUNCTION__.  */
 512 #if (GCC_VERSION < 2007)
 513 #ifndef __FUNCTION__
 514 #define __FUNCTION__ "?"
 515 #endif /* ! __FUNCTION__ */
 516 #endif
 517
 518 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 519    the most likely value of A is B.  This feature was added at some point
 520    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 521 #if (GCC_VERSION < 3000)
 522 #define __builtin_expect(a, b) (a)
 523 #endif
 524
 525 /* Provide some sort of boolean type.  We use stdbool.h if it's
 526   available.  This must be after all inclusion of system headers,
 527   as some of them will mess us up.  */
 528 #undef bool
 529 #undef true
 530 #undef false
 531 #undef TRUE
 532 #undef FALSE
 533
 534 #ifdef HAVE_STDBOOL_H
 535 # include <stdbool.h>
 536 #else
 537 # if !HAVE__BOOL
 538 typedef char _Bool;
 539 # endif
 540 # define bool _Bool
 541 # define true 1
 542 # define false 0
 543 #endif
 544
 545 #define TRUE true
 546 #define FALSE false
 547
 548 /* Provide three core typedefs used by everything, if we are compiling
 549    GCC.  These used to be found in rtl.h and tree.h, but this is no
 550    longer practical.  */
 551 #ifdef IN_GCC
 552 struct rtx_def;
 553 struct rtvec_def;
 554 union tree_node;
 555 typedef struct rtx_def *rtx;
 556 typedef struct rtvec_def *rtvec;
 557 typedef union tree_node *tree;
 558 #endif
 559
 560 /* As the last action in this file, we poison the identifiers that
 561    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 562    preprocessor won't trip on poisoned identifiers that arrive from
 563    the expansion of macros.  E.g. #define strrchr rindex, won't error
 564    if rindex is poisoned after this directive is issued and later on
 565    strrchr is called.
 566
 567    Note: We define bypass macros for the few cases where we really
 568    want to use the libc memory allocation routines.  Otherwise we
 569    insist you use the "x" versions from libiberty.  */
 570
 571 #define really_call_malloc malloc
 572 #define really_call_calloc calloc
 573 #define really_call_realloc realloc
 574
 575 #if (GCC_VERSION >= 3000)
 576
 577 /* Note autoconf checks for prototype declarations and includes
 578    system.h while doing so.  Only poison these tokens if actually
 579    compiling gcc, so that the autoconf declaration tests for malloc
 580    etc don't spuriously fail.  */
 581 #ifdef IN_GCC
 582 #undef malloc
 583 #undef realloc
 584 #undef calloc
 585 #undef strdup
 586  #pragma GCC poison malloc realloc calloc strdup
 587
 588 /* Old target macros that have moved to the target hooks structure.  */
 589  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 590         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 591         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 592         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 593         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 594         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 595         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 596         MD_INIT_BUILTINS MD_EXPAND_BUILTIN
 597 #endif /* IN_GCC */
 598
 599 /* Note: not all uses of the `index' token (e.g. variable names and
 600    structure members) have been eliminated.  */
 601 #undef bcopy
 602 #undef bzero
 603 #undef bcmp
 604 #undef rindex
 605  #pragma GCC poison bcopy bzero bcmp rindex
 606
 607 #endif /* GCC >= 3.0 */
 608
 609 #endif /* ! GCC_SYSTEM_H */