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 /* This macro rounds x up to the y boundary.  */
 373 #define ROUND_UP(x,y) (((x) + (y) - 1) & ~((y) - 1))
 374
 375 /* This macro rounds x down to the y boundary.  */
 376 #define ROUND_DOWN(x,y) ((x) & ~((y) - 1))
 377
 378 #ifdef HAVE_SYS_WAIT_H
 379 #include <sys/wait.h>
 380 #endif
 381
 382 #ifndef WIFSIGNALED
 383 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 384 #endif
 385 #ifndef WTERMSIG
 386 #define WTERMSIG(S) ((S) & 0x7f)
 387 #endif
 388 #ifndef WIFEXITED
 389 #define WIFEXITED(S) (((S) & 0xff) == 0)
 390 #endif
 391 #ifndef WEXITSTATUS
 392 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 393 #endif
 394 #ifndef WSTOPSIG
 395 #define WSTOPSIG WEXITSTATUS
 396 #endif
 397 #ifndef WCOREDUMP
 398 #define WCOREDUMP(S) ((S) & WCOREFLG)
 399 #endif
 400 #ifndef WCOREFLG
 401 #define WCOREFLG 0200
 402 #endif
 403
 404 #include <signal.h>
 405 #if !defined (SIGCHLD) && defined (SIGCLD)
 406 # define SIGCHLD SIGCLD
 407 #endif
 408
 409 #ifdef HAVE_SYS_MMAN_H
 410 # include <sys/mman.h>
 411 #endif
 412
 413 #ifndef MAP_FAILED
 414 # define MAP_FAILED ((void *)-1)
 415 #endif
 416
 417 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
 418 # define MAP_ANONYMOUS MAP_ANON
 419 #endif
 420
 421 #ifdef HAVE_SYS_RESOURCE_H
 422 # include <sys/resource.h>
 423 #endif
 424
 425 #ifdef HAVE_SYS_TIMES_H
 426 # include <sys/times.h>
 427 #endif
 428
 429 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 430    are defined to 0 then we must provide the relevant declaration
 431    here.  These checks will be in the undefined state while configure
 432    is running so be careful to test "defined (HAVE_DECL_*)".  */
 433
 434 #ifdef __cplusplus
 435 extern "C" {
 436 #endif
 437
 438 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 439 extern double atof (const char *);
 440 #endif
 441
 442 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 443 extern long atol (const char *);
 444 #endif
 445
 446 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 447 extern void free (void *);
 448 #endif
 449
 450 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 451 extern char *getcwd (char *, size_t);
 452 #endif
 453
 454 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 455 extern char *getenv (const char *);
 456 #endif
 457
 458 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 459 extern int getopt (int, char * const *, const char *);
 460 #endif
 461
 462 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
 463 extern int getpagesize (void);
 464 #endif
 465
 466 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 467 extern char *getwd (char *);
 468 #endif
 469
 470 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 471 extern void *sbrk (int);
 472 #endif
 473
 474 #if defined (HAVE_DECL_SETENV) && !HAVE_DECL_SETENV
 475 int setenv(const char *, const char *, int);
 476 #endif
 477
 478 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 479 extern char *strstr (const char *, const char *);
 480 #endif
 481
 482 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
 483 extern char *stpcpy (char *, const char *);
 484 #endif
 485
 486 #if defined (HAVE_DECL_UNSETENV) && !HAVE_DECL_UNSETENV
 487 int unsetenv(const char *);
 488 #endif
 489
 490 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 491 extern void *malloc (size_t);
 492 #endif
 493
 494 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 495 extern void *calloc (size_t, size_t);
 496 #endif
 497
 498 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 499 extern void *realloc (void *, size_t);
 500 #endif
 501
 502 #ifdef __cplusplus
 503 }
 504 #endif
 505
 506 #ifdef HAVE_STDINT_H
 507 #include <stdint.h>
 508 #endif
 509
 510 #ifdef HAVE_INTTYPES_H
 511 #include <inttypes.h>
 512 #endif
 513
 514 #ifdef __cplusplus
 515 extern "C" {
 516 #endif
 517
 518 /* If the system doesn't provide strsignal, we get it defined in
 519    libiberty but no declaration is supplied.  */
 520 #if !defined (HAVE_STRSIGNAL) \
 521     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 522 # ifndef strsignal
 523 extern const char *strsignal (int);
 524 # endif
 525 #endif
 526
 527 #ifdef HAVE_GETRLIMIT
 528 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 529 #  ifndef getrlimit
 530 struct rlimit;
 531 extern int getrlimit (int, struct rlimit *);
 532 #  endif
 533 # endif
 534 #endif
 535
 536 #ifdef HAVE_SETRLIMIT
 537 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 538 #  ifndef setrlimit
 539 struct rlimit;
 540 extern int setrlimit (int, const struct rlimit *);
 541 #  endif
 542 # endif
 543 #endif
 544
 545 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 546 extern void abort (void);
 547 #endif
 548
 549 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 550 extern int snprintf (char *, size_t, const char *, ...);
 551 #endif
 552
 553 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 554 extern int vsnprintf (char *, size_t, const char *, va_list);
 555 #endif
 556
 557 #ifdef __cplusplus
 558 }
 559 #endif
 560
 561 /* 1 if we have C99 designated initializers.  */
 562 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 563 #define HAVE_DESIGNATED_INITIALIZERS \
 564   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 565    && !defined(__cplusplus))
 566 #endif
 567
 568 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 569 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 570   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 571    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 572 #endif
 573
 574 #if HAVE_SYS_STAT_H
 575 # include <sys/stat.h>
 576 #endif
 577
 578 /* Test if something is a normal file.  */
 579 #ifndef S_ISREG
 580 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 581 #endif
 582
 583 /* Test if something is a directory.  */
 584 #ifndef S_ISDIR
 585 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 586 #endif
 587
 588 /* Test if something is a character special file.  */
 589 #ifndef S_ISCHR
 590 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 591 #endif
 592
 593 /* Test if something is a block special file.  */
 594 #ifndef S_ISBLK
 595 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 596 #endif
 597
 598 /* Test if something is a socket.  */
 599 #ifndef S_ISSOCK
 600 # ifdef S_IFSOCK
 601 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 602 # else
 603 #   define S_ISSOCK(m) 0
 604 # endif
 605 #endif
 606
 607 /* Test if something is a FIFO.  */
 608 #ifndef S_ISFIFO
 609 # ifdef S_IFIFO
 610 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 611 # else
 612 #  define S_ISFIFO(m) 0
 613 # endif
 614 #endif
 615
 616 /* Define well known filenos if the system does not define them.  */
 617 #ifndef STDIN_FILENO
 618 # define STDIN_FILENO   0
 619 #endif
 620 #ifndef STDOUT_FILENO
 621 # define STDOUT_FILENO  1
 622 #endif
 623 #ifndef STDERR_FILENO
 624 # define STDERR_FILENO  2
 625 #endif
 626
 627 /* Some systems have mkdir that takes a single argument.  */
 628 #ifdef MKDIR_TAKES_ONE_ARG
 629 # define mkdir(a,b) mkdir (a)
 630 #endif
 631
 632 #ifndef HAVE_KILL
 633 # define kill(p,s) raise (s)
 634 #endif
 635
 636 /* Provide a way to print an address via printf.  */
 637 #ifndef HOST_PTR_PRINTF
 638 #define HOST_PTR_PRINTF "%p"
 639 #endif /* ! HOST_PTR_PRINTF */
 640
 641 /* By default, colon separates directories in a path.  */
 642 #ifndef PATH_SEPARATOR
 643 #define PATH_SEPARATOR ':'
 644 #endif
 645
 646 /* Filename handling macros.  */
 647 #include "filenames.h"
 648
 649 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 650 #ifndef DIR_SEPARATOR
 651 # define DIR_SEPARATOR '/'
 652 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 653 #  define DIR_SEPARATOR_2 '\\'
 654 # endif
 655 #endif
 656
 657 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 658 /* If plugin support is enabled, we could use libdl.  */
 659 #include <dlfcn.h>
 660 #endif
 661
 662 /* Do not introduce a gmp.h dependency on the build system.  */
 663 #ifndef GENERATOR_FILE
 664 #include <gmp.h>
 665 #endif
 666
 667 /* Get libiberty declarations.  */
 668 #include "libiberty.h"
 669
 670 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 671 #undef FLOAT /* Likewise.  */
 672 #undef ABS /* Likewise.  */
 673 #undef PC /* Likewise.  */
 674
 675 /* Provide a default for the HOST_BIT_BUCKET.
 676    This suffices for POSIX-like hosts.  */
 677
 678 #ifndef HOST_BIT_BUCKET
 679 #define HOST_BIT_BUCKET "/dev/null"
 680 #endif
 681
 682 #ifndef offsetof
 683 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 684 #endif
 685
 686 /* Various error reporting routines want to use __FUNCTION__.  */
 687 #if (GCC_VERSION < 2007)
 688 #ifndef __FUNCTION__
 689 #define __FUNCTION__ "?"
 690 #endif /* ! __FUNCTION__ */
 691 #endif
 692
 693 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 694    the most likely value of A is B.  This feature was added at some point
 695    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 696 #if (GCC_VERSION < 3000)
 697 #define __builtin_expect(a, b) (a)
 698 #endif
 699
 700 /* Redefine abort to report an internal error w/o coredump, and
 701    reporting the location of the error in the source file.  */
 702 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 703 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 704
 705 /* Use gcc_assert(EXPR) to test invariants.  */
 706 #if ENABLE_ASSERT_CHECKING
 707 #define gcc_assert(EXPR)                                                \
 708    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 709 #elif (GCC_VERSION >= 4005)
 710 #define gcc_assert(EXPR)                                                \
 711   ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
 712 #else
 713 /* Include EXPR, so that unused variable warnings do not occur.  */
 714 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 715 #endif
 716
 717 #if CHECKING_P
 718 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 719 #else
 720 /* N.B.: in release build EXPR is not evaluated.  */
 721 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 722 #endif
 723
 724 /* Use gcc_unreachable() to mark unreachable locations (like an
 725    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 726 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 727 #define gcc_unreachable() __builtin_unreachable ()
 728 #else
 729 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 730 #endif
 731
 732 #if GCC_VERSION >= 3001
 733 #define STATIC_CONSTANT_P(X) (__builtin_constant_p (X) && (X))
 734 #else
 735 #define STATIC_CONSTANT_P(X) (false && (X))
 736 #endif
 737
 738 /* Until we can use C++11's static_assert.  */
 739 #define STATIC_ASSERT(X) \
 740   typedef int assertion1[(X) ? 1 : -1] ATTRIBUTE_UNUSED
 741
 742 /* Provide a fake boolean type.  We make no attempt to use the
 743    C99 _Bool, as it may not be available in the bootstrap compiler,
 744    and even if it is, it is liable to be buggy.
 745    This must be after all inclusion of system headers, as some of
 746    them will mess us up.  */
 747
 748 #undef TRUE
 749 #undef FALSE
 750
 751 #ifdef __cplusplus
 752   /* Obsolete.  */
 753 # define TRUE true
 754 # define FALSE false
 755 #else /* !__cplusplus */
 756 # undef bool
 757 # undef true
 758 # undef false
 759
 760 # define bool unsigned char
 761 # define true 1
 762 # define false 0
 763
 764   /* Obsolete.  */
 765 # define TRUE true
 766 # define FALSE false
 767 #endif /* !__cplusplus */
 768
 769 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 770 #define BOOL_BITFIELD unsigned int
 771
 772 /* As the last action in this file, we poison the identifiers that
 773    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 774    preprocessor won't trip on poisoned identifiers that arrive from
 775    the expansion of macros.  E.g. #define strrchr rindex, won't error
 776    if rindex is poisoned after this directive is issued and later on
 777    strrchr is called.
 778
 779    Note: We define bypass macros for the few cases where we really
 780    want to use the libc memory allocation routines.  Otherwise we
 781    insist you use the "x" versions from libiberty.  */
 782
 783 #define really_call_malloc malloc
 784 #define really_call_calloc calloc
 785 #define really_call_realloc realloc
 786
 787 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 788 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 789    really_call_* cannot be used in a .l or .y file.  */
 790 #define malloc xmalloc
 791 #define realloc xrealloc
 792 #endif
 793
 794 #if (GCC_VERSION >= 3000)
 795
 796 /* Note autoconf checks for prototype declarations and includes
 797    system.h while doing so.  Only poison these tokens if actually
 798    compiling gcc, so that the autoconf declaration tests for malloc
 799    etc don't spuriously fail.  */
 800 #ifdef IN_GCC
 801 #undef calloc
 802 #undef strdup
 803  #pragma GCC poison calloc strdup
 804
 805 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 806 #undef malloc
 807 #undef realloc
 808  #pragma GCC poison malloc realloc
 809 #endif
 810
 811 /* The %m format should be used when GCC's main diagnostic functions
 812    supporting %m are available, and xstrerror from libiberty
 813    otherwise.  */
 814 #undef strerror
 815  #pragma GCC poison strerror
 816
 817 /* loc_t is defined on some systems and too inviting for some
 818    programmers to avoid.  */
 819 #undef loc_t
 820  #pragma GCC poison loc_t
 821
 822 /* Old target macros that have moved to the target hooks structure.  */
 823  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 824         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 825         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 826         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 827         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 828         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 829         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 830         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 831         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 832         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 833         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 834         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 835         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 836         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 837         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 838         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 839         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 840         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 841         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 842         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 843         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 844         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 845         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 846         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 847         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 848         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 849         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 850         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 851         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 852         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 853         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 854         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 855         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 856         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 857         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 858         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 859         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 860         OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
 861         ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK LIBGCC2_HAS_SF_MODE          \
 862         LIBGCC2_HAS_DF_MODE LIBGCC2_HAS_XF_MODE LIBGCC2_HAS_TF_MODE     \
 863         CLEAR_BY_PIECES_P MOVE_BY_PIECES_P SET_BY_PIECES_P              \
 864         STORE_BY_PIECES_P
 865
 866 /* Target macros only used for code built for the target, that have
 867    moved to libgcc-tm.h or have never been present elsewhere.  */
 868  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 869         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 870         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 871
 872 /* Other obsolete target macros, or macros that used to be in target
 873    headers and were not used, and may be obsolete or may never have
 874    been used.  */
 875  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 876         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 877         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 878         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 879         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 880         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 881         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 882         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 883         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 884         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 885         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 886         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 887         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 888         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 889         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 890         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 891         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 892         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 893         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 894         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 895         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 896         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 897         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 898         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 899         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 900         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 901         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 902         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 903         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 904         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 905         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 906         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 907         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 908         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 909         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 910         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 911         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 912         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 913         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 914         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 915         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 916         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 917         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 918         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 919         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 920         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 921         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 922         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 923         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 924         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 925         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 926         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 927         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 928         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 929         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 930         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 931         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 932         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 933         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 934         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 935         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT                    \
 936         LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO          \
 937         IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC    \
 938         DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT      \
 939         REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P                  \
 940         TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS       \
 941         IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP           \
 942         UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP                  \
 943         USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
 944         CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC                     \
 945         GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE              \
 946         ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS \
 947         REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P                        \
 948         CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT                      \
 949         REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT                 \
 950         EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT                       \
 951         EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P          \
 952         CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL                  \
 953         ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
 954         LIBGCC2_LONG_DOUBLE_TYPE_SIZE STRUCT_VALUE EH_FRAME_IN_DATA_SECTION
 955
 956 /* Hooks that are no longer used.  */
 957  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 958         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 959         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 960         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 961         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 962         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
 963         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
 964         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
 965         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
 966         TARGET_IRA_COVER_CLASSES TARGET_HELP \
 967         TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
 968         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
 969         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
 970         TARGET_MD_ASM_CLOBBERS TARGET_RELAXED_ORDERING EXTENDED_SDB_BASIC_TYPES
 971
 972 /* Arrays that were deleted in favor of a functional interface.  */
 973  #pragma GCC poison built_in_decls implicit_built_in_decls
 974
 975 /* Hooks into libgcc2.  */
 976  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
 977    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 978
 979 /* Miscellaneous macros that are no longer used.  */
 980  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
 981
 982 /* Libiberty macros that are no longer used in GCC.  */
 983 #undef ANSI_PROTOTYPES
 984 #undef PTR_CONST
 985 #undef LONG_DOUBLE
 986 #undef VPARAMS
 987 #undef VA_OPEN
 988 #undef VA_FIXEDARG
 989 #undef VA_CLOSE
 990 #undef VA_START
 991  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 992   VA_FIXEDARG VA_CLOSE VA_START
 993 #endif /* IN_GCC */
 994
 995 /* Front ends should never have to include middle-end headers.  Enforce
 996    this by poisoning the header double-include protection defines.  */
 997 #ifdef IN_GCC_FRONTEND
 998 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
 999 #endif
1000
1001 /* Note: not all uses of the `index' token (e.g. variable names and
1002    structure members) have been eliminated.  */
1003 #undef bcopy
1004 #undef bzero
1005 #undef bcmp
1006 #undef rindex
1007  #pragma GCC poison bcopy bzero bcmp rindex
1008
1009 #endif /* GCC >= 3.0 */
1010
1011 /* This macro allows casting away const-ness to pass -Wcast-qual
1012    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
1013    only be used in certain specific cases.  One valid case is where
1014    the C standard definitions or prototypes force you to.  E.g. if you
1015    need to free a const object, or if you pass a const string to
1016    execv, et al.  Another valid use would be in an allocation function
1017    that creates const objects that need to be initialized.  In some
1018    cases we have non-const functions that return the argument
1019    (e.g. next_nonnote_insn).  Rather than create const shadow
1020    functions, we can cast away const-ness in calling these interfaces
1021    if we're careful to verify that the called function does indeed not
1022    modify its argument and the return value is only used in a const
1023    context.  (This can be somewhat dangerous as these assumptions can
1024    change after the fact).  Beyond these uses, most other cases of
1025    using this macro should be viewed with extreme caution.  */
1026
1027 #ifdef __cplusplus
1028 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
1029 #else
1030 #if defined(__GNUC__) && GCC_VERSION > 4000
1031 /* GCC 4.0.x has a bug where it may ICE on this expression,
1032    so does GCC 3.4.x (PR17436).  */
1033 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
1034 #elif defined(__GNUC__)
1035 static inline char *
1036 helper_const_non_const_cast (const char *p)
1037 {
1038   union {
1039     const char *const_c;
1040     char *c;
1041   } val;
1042   val.const_c = p;
1043   return val.c;
1044 }
1045
1046 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1047         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1048 #else
1049 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1050 #endif
1051 #endif
1052 #define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1053 #define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1054 #define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1055 #define CONST_CAST_RTX_INSN(X) CONST_CAST (struct rtx_insn *, (X))
1056 #define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1057 #define CONST_CAST_GIMPLE(X) CONST_CAST (gimple *, (X))
1058
1059 /* Activate certain diagnostics as warnings (not errors via the
1060    -Werror flag).  */
1061 #if GCC_VERSION >= 4003
1062 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1063    an error/-Werror).  */
1064 #ifndef ENABLE_ASSERT_CHECKING
1065 #pragma GCC diagnostic warning "-Wuninitialized"
1066 #endif
1067 #endif
1068
1069 #ifdef ENABLE_VALGRIND_ANNOTATIONS
1070 # ifdef HAVE_VALGRIND_MEMCHECK_H
1071 #  include <valgrind/memcheck.h>
1072 # elif defined HAVE_MEMCHECK_H
1073 #  include <memcheck.h>
1074 # else
1075 #  include <valgrind.h>
1076 # endif
1077 /* Compatibility macros to let valgrind 3.1 work.  */
1078 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1079 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1080 # endif
1081 # ifndef VALGRIND_MAKE_MEM_DEFINED
1082 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1083 # endif
1084 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1085 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1086 # endif
1087 #else
1088 /* Avoid #ifdef:s when we can help it.  */
1089 #define VALGRIND_DISCARD(x)
1090 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1091 #define VALGRIND_FREELIKE_BLOCK(x,y)
1092 #endif
1093
1094 /* In LTO -fwhole-program build we still want to keep the debug functions available
1095    for debugger.  Mark them as used to prevent removal.  */
1096 #if (GCC_VERSION > 4000)
1097 #define DEBUG_FUNCTION __attribute__ ((__used__))
1098 #define DEBUG_VARIABLE __attribute__ ((__used__))
1099 #else
1100 #define DEBUG_FUNCTION
1101 #define DEBUG_VARIABLE
1102 #endif
1103
1104 /* General macro to extract bit Y of X.  */
1105 #define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
1106
1107 /* Get definitions of HOST_WIDE_INT.  */
1108 #include "hwint.h"
1109
1110 #endif /* ! GCC_SYSTEM_H */