gcc/system.h

   1 /* Get common system includes and various definitions and declarations based
   2    on autoconf macros.
   3    Copyright (C) 1998-2015 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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21
  22 #ifndef GCC_SYSTEM_H
  23 #define GCC_SYSTEM_H
  24
  25 /* Define this so that inttypes.h defines the PRI?64 macros even
  26    when compiling with a C++ compiler.  Define it here so in the
  27    event inttypes.h gets pulled in by another header it is already
  28    defined.  */
  29 #define __STDC_FORMAT_MACROS
  30
  31 /* We must include stdarg.h before stdio.h.  */
  32 #include <stdarg.h>
  33
  34 #ifndef va_copy
  35 # ifdef __va_copy
  36 #   define va_copy(d,s)  __va_copy (d, s)
  37 # else
  38 #   define va_copy(d,s)  ((d) = (s))
  39 # endif
  40 #endif
  41
  42 #ifdef HAVE_STDDEF_H
  43 # include <stddef.h>
  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 /* Use the unlocked open routines from libiberty.  */
  54
  55 /* Some of these are #define on some systems, e.g. on AIX to redirect
  56    the names to 64bit capable functions for LARGE_FILES support. These
  57    redefs are pointless here so we can override them.  */
  58
  59 #undef fopen
  60 #undef freopen
  61
  62 #define fopen(PATH, MODE) fopen_unlocked (PATH, MODE)
  63 #define fdopen(FILDES, MODE) fdopen_unlocked (FILDES, MODE)
  64 #define freopen(PATH, MODE, STREAM) freopen_unlocked (PATH, MODE, STREAM)
  65
  66 /* The compiler is not a multi-threaded application and therefore we
  67    do not have to use the locking functions.  In fact, using the locking
  68    functions can cause the compiler to be significantly slower under
  69    I/O bound conditions (such as -g -O0 on very large source files).
  70
  71    HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
  72    code is multi-thread safe by default.  If it is set to 0, then do
  73    not worry about using the _unlocked functions.
  74
  75    fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
  76    extensions and need to be prototyped by hand (since we do not
  77    define _GNU_SOURCE).  */
  78
  79 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
  80
  81 # ifdef HAVE_PUTC_UNLOCKED
  82 #  undef putc
  83 #  define putc(C, Stream) putc_unlocked (C, Stream)
  84 # endif
  85 # ifdef HAVE_PUTCHAR_UNLOCKED
  86 #  undef putchar
  87 #  define putchar(C) putchar_unlocked (C)
  88 # endif
  89 # ifdef HAVE_GETC_UNLOCKED
  90 #  undef getc
  91 #  define getc(Stream) getc_unlocked (Stream)
  92 # endif
  93 # ifdef HAVE_GETCHAR_UNLOCKED
  94 #  undef getchar
  95 #  define getchar() getchar_unlocked ()
  96 # endif
  97 # ifdef HAVE_FPUTC_UNLOCKED
  98 #  undef fputc
  99 #  define fputc(C, Stream) fputc_unlocked (C, Stream)
 100 # endif
 101
 102 #ifdef __cplusplus
 103 extern "C" {
 104 #endif
 105
 106 # ifdef HAVE_CLEARERR_UNLOCKED
 107 #  undef clearerr
 108 #  define clearerr(Stream) clearerr_unlocked (Stream)
 109 #  if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED
 110 extern void clearerr_unlocked (FILE *);
 111 #  endif
 112 # endif
 113 # ifdef HAVE_FEOF_UNLOCKED
 114 #  undef feof
 115 #  define feof(Stream) feof_unlocked (Stream)
 116 #  if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED
 117 extern int feof_unlocked (FILE *);
 118 #  endif
 119 # endif
 120 # ifdef HAVE_FILENO_UNLOCKED
 121 #  undef fileno
 122 #  define fileno(Stream) fileno_unlocked (Stream)
 123 #  if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED
 124 extern int fileno_unlocked (FILE *);
 125 #  endif
 126 # endif
 127 # ifdef HAVE_FFLUSH_UNLOCKED
 128 #  undef fflush
 129 #  define fflush(Stream) fflush_unlocked (Stream)
 130 #  if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED
 131 extern int fflush_unlocked (FILE *);
 132 #  endif
 133 # endif
 134 # ifdef HAVE_FGETC_UNLOCKED
 135 #  undef fgetc
 136 #  define fgetc(Stream) fgetc_unlocked (Stream)
 137 #  if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED
 138 extern int fgetc_unlocked (FILE *);
 139 #  endif
 140 # endif
 141 # ifdef HAVE_FGETS_UNLOCKED
 142 #  undef fgets
 143 #  define fgets(S, n, Stream) fgets_unlocked (S, n, Stream)
 144 #  if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED
 145 extern char *fgets_unlocked (char *, int, FILE *);
 146 #  endif
 147 # endif
 148 # ifdef HAVE_FPUTS_UNLOCKED
 149 #  undef fputs
 150 #  define fputs(String, Stream) fputs_unlocked (String, Stream)
 151 #  if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
 152 extern int fputs_unlocked (const char *, FILE *);
 153 #  endif
 154 # endif
 155 # ifdef HAVE_FERROR_UNLOCKED
 156 #  undef ferror
 157 #  define ferror(Stream) ferror_unlocked (Stream)
 158 #  if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED
 159 extern int ferror_unlocked (FILE *);
 160 #  endif
 161 # endif
 162 # ifdef HAVE_FREAD_UNLOCKED
 163 #  undef fread
 164 #  define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream)
 165 #  if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED
 166 extern size_t fread_unlocked (void *, size_t, size_t, FILE *);
 167 #  endif
 168 # endif
 169 # ifdef HAVE_FWRITE_UNLOCKED
 170 #  undef fwrite
 171 #  define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
 172 #  if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
 173 extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *);
 174 #  endif
 175 # endif
 176 # ifdef HAVE_FPRINTF_UNLOCKED
 177 #  undef fprintf
 178 /* We can't use a function-like macro here because we don't know if
 179    we have varargs macros.  */
 180 #  define fprintf fprintf_unlocked
 181 #  if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
 182 extern int fprintf_unlocked (FILE *, const char *, ...);
 183 #  endif
 184 # endif
 185
 186 #ifdef __cplusplus
 187 }
 188 #endif
 189
 190 #endif
 191
 192 /* ??? Glibc's fwrite/fread_unlocked macros cause
 193    "warning: signed and unsigned type in conditional expression".  */
 194 #undef fread_unlocked
 195 #undef fwrite_unlocked
 196
 197 /* Include <string> before "safe-ctype.h" to avoid GCC poisoning
 198    the ctype macros through safe-ctype.h */
 199
 200 #ifdef __cplusplus
 201 # include <string>
 202 #endif
 203
 204 /* There are an extraordinary number of issues with <ctype.h>.
 205    The last straw is that it varies with the locale.  Use libiberty's
 206    replacement instead.  */
 207 #include "safe-ctype.h"
 208
 209 #include <sys/types.h>
 210
 211 #include <errno.h>
 212
 213 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 214 extern int errno;
 215 #endif
 216
 217 #ifdef __cplusplus
 218 # include <algorithm>
 219 # include <cstring>
 220 # include <utility>
 221 #endif
 222
 223 /* Some of glibc's string inlines cause warnings.  Plus we'd rather
 224    rely on (and therefore test) GCC's string builtins.  */
 225 #define __NO_STRING_INLINES
 226
 227 #ifdef STRING_WITH_STRINGS
 228 # include <string.h>
 229 # include <strings.h>
 230 #else
 231 # ifdef HAVE_STRING_H
 232 #  include <string.h>
 233 # else
 234 #  ifdef HAVE_STRINGS_H
 235 #   include <strings.h>
 236 #  endif
 237 # endif
 238 #endif
 239
 240 #ifdef HAVE_STDLIB_H
 241 # include <stdlib.h>
 242 #endif
 243
 244 /* When compiling C++ we need to include <cstdlib> as well as <stdlib.h> so
 245    that it is processed before we poison "malloc"; otherwise, if a source
 246    file uses a standard library header that includes <cstdlib>, we will get
 247    an error about 'using std::malloc'.  */
 248 #ifdef __cplusplus
 249 #include <cstdlib>
 250 #endif
 251
 252 /* Undef vec_free from AIX stdlib.h header which conflicts with vec.h.  */
 253 #undef vec_free
 254
 255 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
 256    FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
 257    or 0 and 1 if those macros are not defined.  */
 258 #ifndef SUCCESS_EXIT_CODE
 259 # ifdef EXIT_SUCCESS
 260 #  define SUCCESS_EXIT_CODE EXIT_SUCCESS
 261 # else
 262 #  define SUCCESS_EXIT_CODE 0
 263 # endif
 264 #endif
 265
 266 #ifndef FATAL_EXIT_CODE
 267 # ifdef EXIT_FAILURE
 268 #  define FATAL_EXIT_CODE EXIT_FAILURE
 269 # else
 270 #  define FATAL_EXIT_CODE 1
 271 # endif
 272 #endif
 273
 274 #define ICE_EXIT_CODE 4
 275
 276 #ifdef HAVE_UNISTD_H
 277 # include <unistd.h>
 278 #endif
 279
 280 #ifdef HAVE_SYS_PARAM_H
 281 # include <sys/param.h>
 282 /* We use these identifiers later and they appear in some vendor param.h's.  */
 283 # undef PREFETCH
 284 # undef m_slot
 285 #endif
 286
 287 #if HAVE_LIMITS_H
 288 # include <limits.h>
 289 #endif
 290
 291 /* A macro to determine whether a VALUE lies inclusively within a
 292    certain range without evaluating the VALUE more than once.  This
 293    macro won't warn if the VALUE is unsigned and the LOWER bound is
 294    zero, as it would e.g. with "VALUE >= 0 && ...".  Note the LOWER
 295    bound *is* evaluated twice, and LOWER must not be greater than
 296    UPPER.  However the bounds themselves can be either positive or
 297    negative.  */
 298 #define IN_RANGE(VALUE, LOWER, UPPER) \
 299   ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
 300    <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
 301
 302 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 303    macros defined with these cannot be used in #if.  */
 304
 305 /* The extra casts work around common compiler bugs.  */
 306 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 307 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 308    It is necessary at least when t == time_t.  */
 309 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 310                             ? (t) 1 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
 311 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 312
 313 /* Use that infrastructure to provide a few constants.  */
 314 #ifndef UCHAR_MAX
 315 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 316 #endif
 317
 318 #ifdef TIME_WITH_SYS_TIME
 319 # include <sys/time.h>
 320 # include <time.h>
 321 #else
 322 # if HAVE_SYS_TIME_H
 323 #  include <sys/time.h>
 324 # else
 325 #  ifdef HAVE_TIME_H
 326 #   include <time.h>
 327 #  endif
 328 # endif
 329 #endif
 330
 331 #ifdef HAVE_FCNTL_H
 332 # include <fcntl.h>
 333 #else
 334 # ifdef HAVE_SYS_FILE_H
 335 #  include <sys/file.h>
 336 # endif
 337 #endif
 338
 339 #ifndef SEEK_SET
 340 # define SEEK_SET 0
 341 # define SEEK_CUR 1
 342 # define SEEK_END 2
 343 #endif
 344 #ifndef F_OK
 345 # define F_OK 0
 346 # define X_OK 1
 347 # define W_OK 2
 348 # define R_OK 4
 349 #endif
 350 #ifndef O_RDONLY
 351 # define O_RDONLY 0
 352 #endif
 353 #ifndef O_WRONLY
 354 # define O_WRONLY 1
 355 #endif
 356 #ifndef O_BINARY
 357 # define O_BINARY 0
 358 #endif
 359
 360 /* Some systems define these in, e.g., param.h.  We undefine these names
 361    here to avoid the warnings.  We prefer to use our definitions since we
 362    know they are correct.  */
 363
 364 #undef MIN
 365 #undef MAX
 366 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 367 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 368
 369 /* Returns the least number N such that N * Y >= X.  */
 370 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 371
 372 #ifdef HAVE_SYS_WAIT_H
 373 #include <sys/wait.h>
 374 #endif
 375
 376 #ifndef WIFSIGNALED
 377 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 378 #endif
 379 #ifndef WTERMSIG
 380 #define WTERMSIG(S) ((S) & 0x7f)
 381 #endif
 382 #ifndef WIFEXITED
 383 #define WIFEXITED(S) (((S) & 0xff) == 0)
 384 #endif
 385 #ifndef WEXITSTATUS
 386 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 387 #endif
 388 #ifndef WSTOPSIG
 389 #define WSTOPSIG WEXITSTATUS
 390 #endif
 391 #ifndef WCOREDUMP
 392 #define WCOREDUMP(S) ((S) & WCOREFLG)
 393 #endif
 394 #ifndef WCOREFLG
 395 #define WCOREFLG 0200
 396 #endif
 397
 398 #include <signal.h>
 399 #if !defined (SIGCHLD) && defined (SIGCLD)
 400 # define SIGCHLD SIGCLD
 401 #endif
 402
 403 #ifdef HAVE_SYS_MMAN_H
 404 # include <sys/mman.h>
 405 #endif
 406
 407 #ifndef MAP_FAILED
 408 # define MAP_FAILED ((void *)-1)
 409 #endif
 410
 411 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
 412 # define MAP_ANONYMOUS MAP_ANON
 413 #endif
 414
 415 #ifdef HAVE_SYS_RESOURCE_H
 416 # include <sys/resource.h>
 417 #endif
 418
 419 #ifdef HAVE_SYS_TIMES_H
 420 # include <sys/times.h>
 421 #endif
 422
 423 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 424    are defined to 0 then we must provide the relevant declaration
 425    here.  These checks will be in the undefined state while configure
 426    is running so be careful to test "defined (HAVE_DECL_*)".  */
 427
 428 #ifdef __cplusplus
 429 extern "C" {
 430 #endif
 431
 432 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 433 extern double atof (const char *);
 434 #endif
 435
 436 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 437 extern long atol (const char *);
 438 #endif
 439
 440 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 441 extern void free (void *);
 442 #endif
 443
 444 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 445 extern char *getcwd (char *, size_t);
 446 #endif
 447
 448 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 449 extern char *getenv (const char *);
 450 #endif
 451
 452 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 453 extern int getopt (int, char * const *, const char *);
 454 #endif
 455
 456 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
 457 extern int getpagesize (void);
 458 #endif
 459
 460 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 461 extern char *getwd (char *);
 462 #endif
 463
 464 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 465 extern void *sbrk (int);
 466 #endif
 467
 468 #if defined (HAVE_DECL_SETENV) && !HAVE_DECL_SETENV
 469 int setenv(const char *, const char *, int);
 470 #endif
 471
 472 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 473 extern char *strstr (const char *, const char *);
 474 #endif
 475
 476 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
 477 extern char *stpcpy (char *, const char *);
 478 #endif
 479
 480 #if defined (HAVE_DECL_UNSETENV) && !HAVE_DECL_UNSETENV
 481 int unsetenv(const char *);
 482 #endif
 483
 484 #ifdef __cplusplus
 485 }
 486 #endif
 487
 488 #ifdef HAVE_MALLOC_H
 489 #include <malloc.h>
 490 #endif
 491
 492 #ifdef __cplusplus
 493 extern "C" {
 494 #endif
 495
 496 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 497 extern void *malloc (size_t);
 498 #endif
 499
 500 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 501 extern void *calloc (size_t, size_t);
 502 #endif
 503
 504 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 505 extern void *realloc (void *, size_t);
 506 #endif
 507
 508 #ifdef __cplusplus
 509 }
 510 #endif
 511
 512 #ifdef HAVE_STDINT_H
 513 #include <stdint.h>
 514 #endif
 515
 516 #ifdef HAVE_INTTYPES_H
 517 #include <inttypes.h>
 518 #endif
 519
 520 #ifdef __cplusplus
 521 extern "C" {
 522 #endif
 523
 524 /* If the system doesn't provide strsignal, we get it defined in
 525    libiberty but no declaration is supplied.  */
 526 #if !defined (HAVE_STRSIGNAL) \
 527     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 528 # ifndef strsignal
 529 extern const char *strsignal (int);
 530 # endif
 531 #endif
 532
 533 #ifdef HAVE_GETRLIMIT
 534 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 535 #  ifndef getrlimit
 536 struct rlimit;
 537 extern int getrlimit (int, struct rlimit *);
 538 #  endif
 539 # endif
 540 #endif
 541
 542 #ifdef HAVE_SETRLIMIT
 543 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 544 #  ifndef setrlimit
 545 struct rlimit;
 546 extern int setrlimit (int, const struct rlimit *);
 547 #  endif
 548 # endif
 549 #endif
 550
 551 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 552 extern void abort (void);
 553 #endif
 554
 555 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 556 extern int snprintf (char *, size_t, const char *, ...);
 557 #endif
 558
 559 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 560 extern int vsnprintf (char *, size_t, const char *, va_list);
 561 #endif
 562
 563 #ifdef __cplusplus
 564 }
 565 #endif
 566
 567 /* 1 if we have C99 designated initializers.  */
 568 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 569 #define HAVE_DESIGNATED_INITIALIZERS \
 570   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 571    && !defined(__cplusplus))
 572 #endif
 573
 574 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 575 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 576   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 577    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 578 #endif
 579
 580 #if HAVE_SYS_STAT_H
 581 # include <sys/stat.h>
 582 #endif
 583
 584 /* Test if something is a normal file.  */
 585 #ifndef S_ISREG
 586 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 587 #endif
 588
 589 /* Test if something is a directory.  */
 590 #ifndef S_ISDIR
 591 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 592 #endif
 593
 594 /* Test if something is a character special file.  */
 595 #ifndef S_ISCHR
 596 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 597 #endif
 598
 599 /* Test if something is a block special file.  */
 600 #ifndef S_ISBLK
 601 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 602 #endif
 603
 604 /* Test if something is a socket.  */
 605 #ifndef S_ISSOCK
 606 # ifdef S_IFSOCK
 607 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 608 # else
 609 #   define S_ISSOCK(m) 0
 610 # endif
 611 #endif
 612
 613 /* Test if something is a FIFO.  */
 614 #ifndef S_ISFIFO
 615 # ifdef S_IFIFO
 616 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 617 # else
 618 #  define S_ISFIFO(m) 0
 619 # endif
 620 #endif
 621
 622 /* Define well known filenos if the system does not define them.  */
 623 #ifndef STDIN_FILENO
 624 # define STDIN_FILENO   0
 625 #endif
 626 #ifndef STDOUT_FILENO
 627 # define STDOUT_FILENO  1
 628 #endif
 629 #ifndef STDERR_FILENO
 630 # define STDERR_FILENO  2
 631 #endif
 632
 633 /* Some systems have mkdir that takes a single argument.  */
 634 #ifdef MKDIR_TAKES_ONE_ARG
 635 # define mkdir(a,b) mkdir (a)
 636 #endif
 637
 638 #ifndef HAVE_KILL
 639 # define kill(p,s) raise (s)
 640 #endif
 641
 642 /* Provide a way to print an address via printf.  */
 643 #ifndef HOST_PTR_PRINTF
 644 #define HOST_PTR_PRINTF "%p"
 645 #endif /* ! HOST_PTR_PRINTF */
 646
 647 /* By default, colon separates directories in a path.  */
 648 #ifndef PATH_SEPARATOR
 649 #define PATH_SEPARATOR ':'
 650 #endif
 651
 652 /* Filename handling macros.  */
 653 #include "filenames.h"
 654
 655 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 656 #ifndef DIR_SEPARATOR
 657 # define DIR_SEPARATOR '/'
 658 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 659 #  define DIR_SEPARATOR_2 '\\'
 660 # endif
 661 #endif
 662
 663 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 664 /* If plugin support is enabled, we could use libdl.  */
 665 #include <dlfcn.h>
 666 #endif
 667
 668 /* Do not introduce a gmp.h dependency on the build system.  */
 669 #ifndef GENERATOR_FILE
 670 #include <gmp.h>
 671 #endif
 672
 673 /* Get libiberty declarations.  */
 674 #include "libiberty.h"
 675
 676 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 677 #undef FLOAT /* Likewise.  */
 678 #undef ABS /* Likewise.  */
 679 #undef PC /* Likewise.  */
 680
 681 /* Provide a default for the HOST_BIT_BUCKET.
 682    This suffices for POSIX-like hosts.  */
 683
 684 #ifndef HOST_BIT_BUCKET
 685 #define HOST_BIT_BUCKET "/dev/null"
 686 #endif
 687
 688 #ifndef offsetof
 689 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 690 #endif
 691
 692 /* Various error reporting routines want to use __FUNCTION__.  */
 693 #if (GCC_VERSION < 2007)
 694 #ifndef __FUNCTION__
 695 #define __FUNCTION__ "?"
 696 #endif /* ! __FUNCTION__ */
 697 #endif
 698
 699 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 700    the most likely value of A is B.  This feature was added at some point
 701    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 702 #if (GCC_VERSION < 3000)
 703 #define __builtin_expect(a, b) (a)
 704 #endif
 705
 706 /* Redefine abort to report an internal error w/o coredump, and
 707    reporting the location of the error in the source file.  */
 708 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 709 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 710
 711 /* Use gcc_assert(EXPR) to test invariants.  */
 712 #if ENABLE_ASSERT_CHECKING
 713 #define gcc_assert(EXPR)                                                \
 714    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 715 #elif (GCC_VERSION >= 4005)
 716 #define gcc_assert(EXPR)                                                \
 717   ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
 718 #else
 719 /* Include EXPR, so that unused variable warnings do not occur.  */
 720 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 721 #endif
 722
 723 #ifdef ENABLE_CHECKING
 724 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 725 #else
 726 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 727 #endif
 728
 729 /* Use gcc_unreachable() to mark unreachable locations (like an
 730    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 731 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 732 #define gcc_unreachable() __builtin_unreachable ()
 733 #else
 734 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 735 #endif
 736
 737 #if GCC_VERSION >= 3001
 738 #define STATIC_CONSTANT_P(X) (__builtin_constant_p (X) && (X))
 739 #else
 740 #define STATIC_CONSTANT_P(X) (false && (X))
 741 #endif
 742
 743 /* Until we can use C++11's static_assert.  */
 744 #define STATIC_ASSERT(X) \
 745   typedef int assertion1[(X) ? 1 : -1] ATTRIBUTE_UNUSED
 746
 747 /* Provide a fake boolean type.  We make no attempt to use the
 748    C99 _Bool, as it may not be available in the bootstrap compiler,
 749    and even if it is, it is liable to be buggy.
 750    This must be after all inclusion of system headers, as some of
 751    them will mess us up.  */
 752
 753 #undef TRUE
 754 #undef FALSE
 755
 756 #ifdef __cplusplus
 757   /* Obsolete.  */
 758 # define TRUE true
 759 # define FALSE false
 760 #else /* !__cplusplus */
 761 # undef bool
 762 # undef true
 763 # undef false
 764
 765 # define bool unsigned char
 766 # define true 1
 767 # define false 0
 768
 769   /* Obsolete.  */
 770 # define TRUE true
 771 # define FALSE false
 772 #endif /* !__cplusplus */
 773
 774 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 775 #define BOOL_BITFIELD unsigned int
 776
 777 /* As the last action in this file, we poison the identifiers that
 778    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 779    preprocessor won't trip on poisoned identifiers that arrive from
 780    the expansion of macros.  E.g. #define strrchr rindex, won't error
 781    if rindex is poisoned after this directive is issued and later on
 782    strrchr is called.
 783
 784    Note: We define bypass macros for the few cases where we really
 785    want to use the libc memory allocation routines.  Otherwise we
 786    insist you use the "x" versions from libiberty.  */
 787
 788 #define really_call_malloc malloc
 789 #define really_call_calloc calloc
 790 #define really_call_realloc realloc
 791
 792 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 793 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 794    really_call_* cannot be used in a .l or .y file.  */
 795 #define malloc xmalloc
 796 #define realloc xrealloc
 797 #endif
 798
 799 #if (GCC_VERSION >= 3000)
 800
 801 /* Note autoconf checks for prototype declarations and includes
 802    system.h while doing so.  Only poison these tokens if actually
 803    compiling gcc, so that the autoconf declaration tests for malloc
 804    etc don't spuriously fail.  */
 805 #ifdef IN_GCC
 806 #undef calloc
 807 #undef strdup
 808  #pragma GCC poison calloc strdup
 809
 810 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 811 #undef malloc
 812 #undef realloc
 813  #pragma GCC poison malloc realloc
 814 #endif
 815
 816 /* The %m format should be used when GCC's main diagnostic functions
 817    supporting %m are available, and xstrerror from libiberty
 818    otherwise.  */
 819 #undef strerror
 820  #pragma GCC poison strerror
 821
 822 /* loc_t is defined on some systems and too inviting for some
 823    programmers to avoid.  */
 824 #undef loc_t
 825  #pragma GCC poison loc_t
 826
 827 /* Old target macros that have moved to the target hooks structure.  */
 828  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 829         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 830         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 831         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 832         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 833         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 834         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 835         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 836         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 837         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 838         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 839         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 840         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 841         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 842         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 843         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 844         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 845         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 846         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 847         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 848         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 849         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 850         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 851         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 852         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 853         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 854         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 855         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 856         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 857         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 858         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 859         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 860         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 861         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 862         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 863         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 864         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 865         OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
 866         ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK LIBGCC2_HAS_SF_MODE          \
 867         LIBGCC2_HAS_DF_MODE LIBGCC2_HAS_XF_MODE LIBGCC2_HAS_TF_MODE     \
 868         CLEAR_BY_PIECES_P MOVE_BY_PIECES_P SET_BY_PIECES_P              \
 869         STORE_BY_PIECES_P
 870
 871 /* Target macros only used for code built for the target, that have
 872    moved to libgcc-tm.h or have never been present elsewhere.  */
 873  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 874         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 875         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 876
 877 /* Other obsolete target macros, or macros that used to be in target
 878    headers and were not used, and may be obsolete or may never have
 879    been used.  */
 880  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 881         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 882         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 883         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 884         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 885         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 886         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 887         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 888         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 889         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 890         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 891         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 892         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 893         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 894         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 895         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 896         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 897         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 898         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 899         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 900         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 901         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 902         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 903         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 904         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 905         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 906         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 907         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 908         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 909         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 910         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 911         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 912         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 913         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 914         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 915         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 916         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 917         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 918         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 919         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 920         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 921         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 922         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 923         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 924         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 925         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 926         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 927         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 928         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 929         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 930         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 931         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 932         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 933         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 934         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 935         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 936         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 937         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 938         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 939         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 940         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT                    \
 941         LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO          \
 942         IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC    \
 943         DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT      \
 944         REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P                  \
 945         TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS       \
 946         IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP           \
 947         UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP                  \
 948         USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
 949         CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC                     \
 950         GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE              \
 951         ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS \
 952         REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P                        \
 953         CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT                      \
 954         REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT                 \
 955         EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT                       \
 956         EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P          \
 957         CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL                  \
 958         ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
 959         LIBGCC2_LONG_DOUBLE_TYPE_SIZE STRUCT_VALUE EH_FRAME_IN_DATA_SECTION
 960
 961 /* Hooks that are no longer used.  */
 962  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 963         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 964         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 965         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 966         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 967         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
 968         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
 969         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
 970         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
 971         TARGET_IRA_COVER_CLASSES TARGET_HELP \
 972         TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
 973         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
 974         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
 975         TARGET_MD_ASM_CLOBBERS TARGET_RELAXED_ORDERING
 976
 977 /* Arrays that were deleted in favor of a functional interface.  */
 978  #pragma GCC poison built_in_decls implicit_built_in_decls
 979
 980 /* Hooks into libgcc2.  */
 981  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
 982    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 983
 984 /* Miscellaneous macros that are no longer used.  */
 985  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
 986
 987 /* Libiberty macros that are no longer used in GCC.  */
 988 #undef ANSI_PROTOTYPES
 989 #undef PTR_CONST
 990 #undef LONG_DOUBLE
 991 #undef VPARAMS
 992 #undef VA_OPEN
 993 #undef VA_FIXEDARG
 994 #undef VA_CLOSE
 995 #undef VA_START
 996  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 997   VA_FIXEDARG VA_CLOSE VA_START
 998 #endif /* IN_GCC */
 999
1000 /* Front ends should never have to include middle-end headers.  Enforce
1001    this by poisoning the header double-include protection defines.  */
1002 #ifdef IN_GCC_FRONTEND
1003 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
1004 #endif
1005
1006 /* Note: not all uses of the `index' token (e.g. variable names and
1007    structure members) have been eliminated.  */
1008 #undef bcopy
1009 #undef bzero
1010 #undef bcmp
1011 #undef rindex
1012  #pragma GCC poison bcopy bzero bcmp rindex
1013
1014 #endif /* GCC >= 3.0 */
1015
1016 /* This macro allows casting away const-ness to pass -Wcast-qual
1017    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
1018    only be used in certain specific cases.  One valid case is where
1019    the C standard definitions or prototypes force you to.  E.g. if you
1020    need to free a const object, or if you pass a const string to
1021    execv, et al.  Another valid use would be in an allocation function
1022    that creates const objects that need to be initialized.  In some
1023    cases we have non-const functions that return the argument
1024    (e.g. next_nonnote_insn).  Rather than create const shadow
1025    functions, we can cast away const-ness in calling these interfaces
1026    if we're careful to verify that the called function does indeed not
1027    modify its argument and the return value is only used in a const
1028    context.  (This can be somewhat dangerous as these assumptions can
1029    change after the fact).  Beyond these uses, most other cases of
1030    using this macro should be viewed with extreme caution.  */
1031
1032 #ifdef __cplusplus
1033 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
1034 #else
1035 #if defined(__GNUC__) && GCC_VERSION > 4000
1036 /* GCC 4.0.x has a bug where it may ICE on this expression,
1037    so does GCC 3.4.x (PR17436).  */
1038 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
1039 #elif defined(__GNUC__)
1040 static inline char *
1041 helper_const_non_const_cast (const char *p)
1042 {
1043   union {
1044     const char *const_c;
1045     char *c;
1046   } val;
1047   val.const_c = p;
1048   return val.c;
1049 }
1050
1051 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1052         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1053 #else
1054 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1055 #endif
1056 #endif
1057 #define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1058 #define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1059 #define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1060 #define CONST_CAST_RTX_INSN(X) CONST_CAST (struct rtx_insn *, (X))
1061 #define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1062 #define CONST_CAST_GIMPLE(X) CONST_CAST (gimple *, (X))
1063
1064 /* Activate certain diagnostics as warnings (not errors via the
1065    -Werror flag).  */
1066 #if GCC_VERSION >= 4003
1067 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1068    an error/-Werror).  */
1069 #ifndef ENABLE_ASSERT_CHECKING
1070 #pragma GCC diagnostic warning "-Wuninitialized"
1071 #endif
1072 #endif
1073
1074 #ifdef ENABLE_VALGRIND_ANNOTATIONS
1075 # ifdef HAVE_VALGRIND_MEMCHECK_H
1076 #  include <valgrind/memcheck.h>
1077 # elif defined HAVE_MEMCHECK_H
1078 #  include <memcheck.h>
1079 # else
1080 #  include <valgrind.h>
1081 # endif
1082 /* Compatibility macros to let valgrind 3.1 work.  */
1083 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1084 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1085 # endif
1086 # ifndef VALGRIND_MAKE_MEM_DEFINED
1087 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1088 # endif
1089 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1090 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1091 # endif
1092 #else
1093 /* Avoid #ifdef:s when we can help it.  */
1094 #define VALGRIND_DISCARD(x)
1095 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1096 #define VALGRIND_FREELIKE_BLOCK(x,y)
1097 #endif
1098
1099 /* In LTO -fwhole-program build we still want to keep the debug functions available
1100    for debugger.  Mark them as used to prevent removal.  */
1101 #if (GCC_VERSION > 4000)
1102 #define DEBUG_FUNCTION __attribute__ ((__used__))
1103 #define DEBUG_VARIABLE __attribute__ ((__used__))
1104 #else
1105 #define DEBUG_FUNCTION
1106 #define DEBUG_VARIABLE
1107 #endif
1108
1109 /* General macro to extract bit Y of X.  */
1110 #define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
1111
1112 /* Get definitions of HOST_WIDE_INT.  */
1113 #include "hwint.h"
1114
1115 #endif /* ! GCC_SYSTEM_H */