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, 2002, 2003 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 /* We must include stdarg.h before stdio.h.  */
  27 #include <stdarg.h>
  28
  29 #ifndef va_copy
  30 # ifdef __va_copy
  31 #   define va_copy(d,s)  __va_copy((d),(s))
  32 # else
  33 #   define va_copy(d,s)  ((d) = (s))
  34 # endif
  35 #endif
  36
  37 #ifdef HAVE_STDDEF_H
  38 # include <stddef.h>
  39 #endif
  40
  41 #include <stdio.h>
  42
  43 /* Define a generic NULL if one hasn't already been defined.  */
  44 #ifndef NULL
  45 #define NULL 0
  46 #endif
  47
  48 /* The compiler is not a multi-threaded application and therefore we
  49    do not have to use the locking functions.  In fact, using the locking
  50    functions can cause the compiler to be significantly slower under
  51    I/O bound conditions (such as -g -O0 on very large source files).
  52
  53    HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
  54    code is multi-thread safe by default.  If it is set to 0, then do
  55    not worry about using the _unlocked functions.
  56
  57    fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
  58    extensions and need to be prototyped by hand (since we do not
  59    define _GNU_SOURCE).  */
  60
  61 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
  62
  63 # ifdef HAVE_PUTC_UNLOCKED
  64 #  undef putc
  65 #  define putc(C, Stream) putc_unlocked (C, Stream)
  66 # endif
  67 # ifdef HAVE_FPUTC_UNLOCKED
  68 #  undef fputc
  69 #  define fputc(C, Stream) fputc_unlocked (C, Stream)
  70 # endif
  71
  72 # ifdef HAVE_FPUTS_UNLOCKED
  73 #  undef fputs
  74 #  define fputs(String, Stream) fputs_unlocked (String, Stream)
  75 #  if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
  76 extern int fputs_unlocked (const char *, FILE *);
  77 #  endif
  78 # endif
  79 # ifdef HAVE_FWRITE_UNLOCKED
  80 #  undef fwrite
  81 #  define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
  82 #  if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
  83 extern int fwrite_unlocked (const void *, size_t, size_t, FILE *);
  84 #  endif
  85 # endif
  86 # ifdef HAVE_FPRINTF_UNLOCKED
  87 #  undef fprintf
  88 /* We can't use a function-like macro here because we don't know if
  89    we have varargs macros.  */
  90 #  define fprintf fprintf_unlocked
  91 #  if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
  92 extern int fprintf_unlocked (FILE *, const char *, ...);
  93 #  endif
  94 # endif
  95
  96 #endif
  97
  98 /* ??? Glibc's fwrite/fread_unlocked macros cause
  99    "warning: signed and unsigned type in conditional expression".  */
 100 #undef fread_unlocked
 101 #undef fwrite_unlocked
 102
 103 /* There are an extraordinary number of issues with <ctype.h>.
 104    The last straw is that it varies with the locale.  Use libiberty's
 105    replacement instead.  */
 106 #include <safe-ctype.h>
 107
 108 #include <sys/types.h>
 109
 110 #include <errno.h>
 111
 112 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 113 extern int errno;
 114 #endif
 115
 116 /* Some of glibc's string inlines cause warnings.  Plus we'd rather
 117    rely on (and therefore test) GCC's string builtins.  */
 118 #define __NO_STRING_INLINES
 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 /* We use this identifier later and it appears in some vendor param.h's.  */
 163 # undef PREFETCH
 164 #endif
 165
 166 #if HAVE_LIMITS_H
 167 # include <limits.h>
 168 #endif
 169
 170 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT.  */
 171 #include "hwint.h"
 172
 173 /* A macro to determine whether a VALUE lies inclusively within a
 174    certain range without evaluating the VALUE more than once.  This
 175    macro won't warn if the VALUE is unsigned and the LOWER bound is
 176    zero, as it would e.g. with "VALUE >= 0 && ...".  Note the LOWER
 177    bound *is* evaluated twice, and LOWER must not be greater than
 178    UPPER.  However the bounds themselves can be either positive or
 179    negative.  */
 180 #define IN_RANGE(VALUE, LOWER, UPPER) \
 181   ((unsigned HOST_WIDE_INT) ((VALUE) - (LOWER)) <= ((UPPER) - (LOWER)))
 182
 183 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 184    macros defined with these cannot be used in #if.  */
 185
 186 /* The extra casts work around common compiler bugs.  */
 187 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 188 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 189    It is necessary at least when t == time_t.  */
 190 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 191                              ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
 192 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 193
 194 /* Use that infrastructure to provide a few constants.  */
 195 #ifndef UCHAR_MAX
 196 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 197 #endif
 198
 199 #ifdef TIME_WITH_SYS_TIME
 200 # include <sys/time.h>
 201 # include <time.h>
 202 #else
 203 # if HAVE_SYS_TIME_H
 204 #  include <sys/time.h>
 205 # else
 206 #  ifdef HAVE_TIME_H
 207 #   include <time.h>
 208 #  endif
 209 # endif
 210 #endif
 211
 212 #ifdef HAVE_FCNTL_H
 213 # include <fcntl.h>
 214 #else
 215 # ifdef HAVE_SYS_FILE_H
 216 #  include <sys/file.h>
 217 # endif
 218 #endif
 219
 220 #ifndef SEEK_SET
 221 # define SEEK_SET 0
 222 # define SEEK_CUR 1
 223 # define SEEK_END 2
 224 #endif
 225 #ifndef F_OK
 226 # define F_OK 0
 227 # define X_OK 1
 228 # define W_OK 2
 229 # define R_OK 4
 230 #endif
 231 #ifndef O_RDONLY
 232 # define O_RDONLY 0
 233 #endif
 234 #ifndef O_WRONLY
 235 # define O_WRONLY 1
 236 #endif
 237
 238 /* Some systems define these in, e.g., param.h.  We undefine these names
 239    here to avoid the warnings.  We prefer to use our definitions since we
 240    know they are correct.  */
 241
 242 #undef MIN
 243 #undef MAX
 244 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 245 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 246
 247 /* Returns the least number N such that N * Y >= X.  */
 248 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 249
 250 #ifdef HAVE_SYS_WAIT_H
 251 #include <sys/wait.h>
 252 #endif
 253
 254 #ifndef WIFSIGNALED
 255 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 256 #endif
 257 #ifndef WTERMSIG
 258 #define WTERMSIG(S) ((S) & 0x7f)
 259 #endif
 260 #ifndef WIFEXITED
 261 #define WIFEXITED(S) (((S) & 0xff) == 0)
 262 #endif
 263 #ifndef WEXITSTATUS
 264 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 265 #endif
 266 #ifndef WSTOPSIG
 267 #define WSTOPSIG WEXITSTATUS
 268 #endif
 269 #ifndef WCOREDUMP
 270 #define WCOREDUMP(S) ((S) & WCOREFLG)
 271 #endif
 272 #ifndef WCOREFLG
 273 #define WCOREFLG 0200
 274 #endif
 275
 276 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 277    are defined to 0 then we must provide the relevant declaration
 278    here.  These checks will be in the undefined state while configure
 279    is running so be careful to test "defined (HAVE_DECL_*)".  */
 280
 281 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 282 extern double atof (const char *);
 283 #endif
 284
 285 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 286 extern long atol (const char *);
 287 #endif
 288
 289 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 290 extern void free (void *);
 291 #endif
 292
 293 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 294 extern char *getcwd (char *, size_t);
 295 #endif
 296
 297 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 298 extern char *getenv (const char *);
 299 #endif
 300
 301 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 302 extern int getopt (int, char * const *, const char *);
 303 #endif
 304
 305 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 306 extern char *getwd (char *);
 307 #endif
 308
 309 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 310 extern void *sbrk (int);
 311 #endif
 312
 313 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 314 extern char *strstr (const char *, const char *);
 315 #endif
 316
 317 #ifdef HAVE_MALLOC_H
 318 #include <malloc.h>
 319 #endif
 320
 321 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 322 extern void *malloc (size_t);
 323 #endif
 324
 325 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 326 extern void *calloc (size_t, size_t);
 327 #endif
 328
 329 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 330 extern void *realloc (void *, size_t);
 331 #endif
 332
 333 /* If the system doesn't provide strsignal, we get it defined in
 334    libiberty but no declaration is supplied.  */
 335 #if !defined (HAVE_STRSIGNAL) \
 336     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 337 # ifndef strsignal
 338 extern const char *strsignal (int);
 339 # endif
 340 #endif
 341
 342 #ifdef HAVE_GETRLIMIT
 343 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 344 #  ifndef getrlimit
 345 struct rlimit;
 346 extern int getrlimit (int, struct rlimit *);
 347 #  endif
 348 # endif
 349 #endif
 350
 351 #ifdef HAVE_SETRLIMIT
 352 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 353 #  ifndef setrlimit
 354 struct rlimit;
 355 extern int setrlimit (int, const struct rlimit *);
 356 #  endif
 357 # endif
 358 #endif
 359
 360 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 361 extern void abort (void);
 362 #endif
 363
 364 /* 1 if we have C99 designated initializers.  */
 365 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 366 #define HAVE_DESIGNATED_INITIALIZERS \
 367   ((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L))
 368 #endif
 369
 370 /* 1 if we have _Bool.  */
 371 #ifndef HAVE__BOOL
 372 # define HAVE__BOOL \
 373    ((GCC_VERSION >= 3000) || (__STDC_VERSION__ >= 199901L))
 374 #endif
 375
 376
 377 #if HAVE_SYS_STAT_H
 378 # include <sys/stat.h>
 379 #endif
 380
 381 /* Test if something is a normal file.  */
 382 #ifndef S_ISREG
 383 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 384 #endif
 385
 386 /* Test if something is a directory.  */
 387 #ifndef S_ISDIR
 388 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 389 #endif
 390
 391 /* Test if something is a character special file.  */
 392 #ifndef S_ISCHR
 393 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 394 #endif
 395
 396 /* Test if something is a block special file.  */
 397 #ifndef S_ISBLK
 398 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 399 #endif
 400
 401 /* Test if something is a socket.  */
 402 #ifndef S_ISSOCK
 403 # ifdef S_IFSOCK
 404 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 405 # else
 406 #   define S_ISSOCK(m) 0
 407 # endif
 408 #endif
 409
 410 /* Test if something is a FIFO.  */
 411 #ifndef S_ISFIFO
 412 # ifdef S_IFIFO
 413 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 414 # else
 415 #  define S_ISFIFO(m) 0
 416 # endif
 417 #endif
 418
 419 /* Approximate O_NONBLOCK.  */
 420 #ifndef O_NONBLOCK
 421 #define O_NONBLOCK O_NDELAY
 422 #endif
 423
 424 /* Approximate O_NOCTTY.  */
 425 #ifndef O_NOCTTY
 426 #define O_NOCTTY 0
 427 #endif
 428
 429 /* Define well known filenos if the system does not define them.  */
 430 #ifndef STDIN_FILENO
 431 # define STDIN_FILENO   0
 432 #endif
 433 #ifndef STDOUT_FILENO
 434 # define STDOUT_FILENO  1
 435 #endif
 436 #ifndef STDERR_FILENO
 437 # define STDERR_FILENO  2
 438 #endif
 439
 440 /* Some systems have mkdir that takes a single argument.  */
 441 #ifdef MKDIR_TAKES_ONE_ARG
 442 # define mkdir(a,b) mkdir(a)
 443 #endif
 444
 445 /* Provide a way to print an address via printf.  */
 446 #ifndef HOST_PTR_PRINTF
 447 # ifdef HAVE_PRINTF_PTR
 448 #  define HOST_PTR_PRINTF "%p"
 449 # elif SIZEOF_INT == SIZEOF_VOID_P
 450 #  define HOST_PTR_PRINTF "%x"
 451 # elif SIZEOF_LONG == SIZEOF_VOID_P
 452 #  define HOST_PTR_PRINTF "%lx"
 453 # else
 454 #  define HOST_PTR_PRINTF "%llx"
 455 # endif
 456 #endif /* ! HOST_PTR_PRINTF */
 457
 458 /* By default, colon separates directories in a path.  */
 459 #ifndef PATH_SEPARATOR
 460 #define PATH_SEPARATOR ':'
 461 #endif
 462
 463 /* Filename handling macros.  */
 464 #include "filenames.h"
 465
 466 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 467 #ifndef DIR_SEPARATOR
 468 # define DIR_SEPARATOR '/'
 469 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 470 #  define DIR_SEPARATOR_2 '\\'
 471 # endif
 472 #endif
 473
 474 /* Get libiberty declarations.  */
 475 #include "libiberty.h"
 476
 477 /* Provide a default for the HOST_BIT_BUCKET.
 478    This suffices for POSIX-like hosts.  */
 479
 480 #ifndef HOST_BIT_BUCKET
 481 #define HOST_BIT_BUCKET "/dev/null"
 482 #endif
 483
 484 /* Be conservative and only use enum bitfields with GCC.  Likewise for
 485    char bitfields.
 486    FIXME: provide a complete autoconf test for buggy enum bitfields.  */
 487
 488 #if (GCC_VERSION > 2000)
 489 #define ENUM_BITFIELD(TYPE) enum TYPE
 490 #define CHAR_BITFIELD unsigned char
 491 #else
 492 #define ENUM_BITFIELD(TYPE) unsigned int
 493 #define CHAR_BITFIELD unsigned int
 494 #endif
 495
 496 #ifndef offsetof
 497 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 498 #endif
 499
 500 /* Various error reporting routines want to use __FUNCTION__.  */
 501 #if (GCC_VERSION < 2007)
 502 #ifndef __FUNCTION__
 503 #define __FUNCTION__ "?"
 504 #endif /* ! __FUNCTION__ */
 505 #endif
 506
 507 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 508    the most likely value of A is B.  This feature was added at some point
 509    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 510 #if (GCC_VERSION < 3000)
 511 #define __builtin_expect(a, b) (a)
 512 #endif
 513
 514 /* Provide some sort of boolean type.  We use stdbool.h if it's
 515   available.  This must be after all inclusion of system headers,
 516   as some of them will mess us up.  */
 517 #undef bool
 518 #undef true
 519 #undef false
 520 #undef TRUE
 521 #undef FALSE
 522
 523 #ifdef HAVE_STDBOOL_H
 524 # include <stdbool.h>
 525 #else
 526 # if !HAVE__BOOL
 527 typedef char _Bool;
 528 # endif
 529 # define bool _Bool
 530 # define true 1
 531 # define false 0
 532 #endif
 533
 534 #define TRUE true
 535 #define FALSE false
 536
 537 /* As the last action in this file, we poison the identifiers that
 538    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 539    preprocessor won't trip on poisoned identifiers that arrive from
 540    the expansion of macros.  E.g. #define strrchr rindex, won't error
 541    if rindex is poisoned after this directive is issued and later on
 542    strrchr is called.
 543
 544    Note: We define bypass macros for the few cases where we really
 545    want to use the libc memory allocation routines.  Otherwise we
 546    insist you use the "x" versions from libiberty.  */
 547
 548 #define really_call_malloc malloc
 549 #define really_call_calloc calloc
 550 #define really_call_realloc realloc
 551
 552 #if defined(FLEX_SCANNER) || defined(YYBISON)
 553 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 554    really_call_* cannot be used in a .l or .y file.  */
 555 #define malloc xmalloc
 556 #define realloc xrealloc
 557 #endif
 558
 559 #if (GCC_VERSION >= 3000)
 560
 561 /* Note autoconf checks for prototype declarations and includes
 562    system.h while doing so.  Only poison these tokens if actually
 563    compiling gcc, so that the autoconf declaration tests for malloc
 564    etc don't spuriously fail.  */
 565 #ifdef IN_GCC
 566 #undef calloc
 567 #undef strdup
 568  #pragma GCC poison calloc strdup
 569
 570 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 571 #undef malloc
 572 #undef realloc
 573  #pragma GCC poison malloc realloc
 574 #endif
 575
 576 /* Old target macros that have moved to the target hooks structure.  */
 577  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 578         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 579         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 580         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 581         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 582         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 583         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 584         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 585         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 586         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 587         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 588         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 589         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 590         ASM_SIMPLIFY_DWARF_ADDR
 591
 592 /* Other obsolete target macros, or macros that used to be in target
 593    headers and were not used, and may be obsolete or may never have
 594    been used.  */
 595  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 596         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 597         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 598         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 599         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 600         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 601         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 602         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 603         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 604         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 605         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 606         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP                \
 607         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL ASM_OUTPUT_INTERNAL_LABEL \
 608         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 609         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 610         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 611         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 612         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 613         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 614         LIBGCC_NEEDS_DOUBLE
 615
 616 /* Hooks that are no longer used.  */
 617  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 618         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES
 619
 620 /* Libiberty macros that are no longer used in GCC.  */
 621 #undef ANSI_PROTOTYPES
 622 #undef PTR_CONST
 623 #undef LONG_DOUBLE
 624 #undef VPARAMS
 625 #undef VA_OPEN
 626 #undef VA_FIXEDARG
 627 #undef VA_CLOSE
 628 #undef VA_START
 629  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 630   VA_FIXEDARG VA_CLOSE VA_START
 631 #endif /* IN_GCC */
 632
 633 /* Note: not all uses of the `index' token (e.g. variable names and
 634    structure members) have been eliminated.  */
 635 #undef bcopy
 636 #undef bzero
 637 #undef bcmp
 638 #undef rindex
 639  #pragma GCC poison bcopy bzero bcmp rindex
 640
 641 #endif /* GCC >= 3.0 */
 642
 643 #endif /* ! GCC_SYSTEM_H */