gcc/system.h

   1 /* Get common system includes and various definitions and declarations based
   2    on autoconf macros.
   3    Copyright (C) 1998-2016 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 #ifdef INCLUDE_STRING
 202 # include <string>
 203 #endif
 204 #endif
 205
 206 /* There are an extraordinary number of issues with <ctype.h>.
 207    The last straw is that it varies with the locale.  Use libiberty's
 208    replacement instead.  */
 209 #include "safe-ctype.h"
 210
 211 #include <sys/types.h>
 212
 213 #include <errno.h>
 214
 215 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 216 extern int errno;
 217 #endif
 218
 219 #ifdef __cplusplus
 220 #if defined (INCLUDE_ALGORITHM) || !defined (HAVE_SWAP_IN_UTILITY)
 221 # include <algorithm>
 222 #endif
 223 #ifdef INCLUDE_LIST
 224 # include <list>
 225 #endif
 226 #ifdef INCLUDE_MAP
 227 # include <map>
 228 #endif
 229 #ifdef INCLUDE_SET
 230 # include <set>
 231 #endif
 232 #ifdef INCLUDE_VECTOR
 233 # include <vector>
 234 #endif
 235 # include <cstring>
 236 # include <new>
 237 # include <utility>
 238 #endif
 239
 240 /* Some of glibc's string inlines cause warnings.  Plus we'd rather
 241    rely on (and therefore test) GCC's string builtins.  */
 242 #define __NO_STRING_INLINES
 243
 244 #ifdef STRING_WITH_STRINGS
 245 # include <string.h>
 246 # include <strings.h>
 247 #else
 248 # ifdef HAVE_STRING_H
 249 #  include <string.h>
 250 # else
 251 #  ifdef HAVE_STRINGS_H
 252 #   include <strings.h>
 253 #  endif
 254 # endif
 255 #endif
 256
 257 #ifdef HAVE_STDLIB_H
 258 # include <stdlib.h>
 259 #endif
 260
 261 /* When compiling C++ we need to include <cstdlib> as well as <stdlib.h> so
 262    that it is processed before we poison "malloc"; otherwise, if a source
 263    file uses a standard library header that includes <cstdlib>, we will get
 264    an error about 'using std::malloc'.  */
 265 #ifdef __cplusplus
 266 #include <cstdlib>
 267 #endif
 268
 269 /* Undef vec_free from AIX stdlib.h header which conflicts with vec.h.  */
 270 #undef vec_free
 271
 272 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
 273    FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
 274    or 0 and 1 if those macros are not defined.  */
 275 #ifndef SUCCESS_EXIT_CODE
 276 # ifdef EXIT_SUCCESS
 277 #  define SUCCESS_EXIT_CODE EXIT_SUCCESS
 278 # else
 279 #  define SUCCESS_EXIT_CODE 0
 280 # endif
 281 #endif
 282
 283 #ifndef FATAL_EXIT_CODE
 284 # ifdef EXIT_FAILURE
 285 #  define FATAL_EXIT_CODE EXIT_FAILURE
 286 # else
 287 #  define FATAL_EXIT_CODE 1
 288 # endif
 289 #endif
 290
 291 #define ICE_EXIT_CODE 4
 292
 293 #ifdef HAVE_UNISTD_H
 294 # include <unistd.h>
 295 #endif
 296
 297 #ifdef HAVE_SYS_PARAM_H
 298 # include <sys/param.h>
 299 /* We use these identifiers later and they appear in some vendor param.h's.  */
 300 # undef PREFETCH
 301 # undef m_slot
 302 #endif
 303
 304 #if HAVE_LIMITS_H
 305 # include <limits.h>
 306 #endif
 307
 308 /* A macro to determine whether a VALUE lies inclusively within a
 309    certain range without evaluating the VALUE more than once.  This
 310    macro won't warn if the VALUE is unsigned and the LOWER bound is
 311    zero, as it would e.g. with "VALUE >= 0 && ...".  Note the LOWER
 312    bound *is* evaluated twice, and LOWER must not be greater than
 313    UPPER.  However the bounds themselves can be either positive or
 314    negative.  */
 315 #define IN_RANGE(VALUE, LOWER, UPPER) \
 316   ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
 317    <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
 318
 319 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 320    macros defined with these cannot be used in #if.  */
 321
 322 /* The extra casts work around common compiler bugs.  */
 323 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 324 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 325    It is necessary at least when t == time_t.  */
 326 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 327                             ? (t) 1 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
 328 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 329
 330 /* Use that infrastructure to provide a few constants.  */
 331 #ifndef UCHAR_MAX
 332 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 333 #endif
 334
 335 #ifdef TIME_WITH_SYS_TIME
 336 # include <sys/time.h>
 337 # include <time.h>
 338 #else
 339 # if HAVE_SYS_TIME_H
 340 #  include <sys/time.h>
 341 # else
 342 #  ifdef HAVE_TIME_H
 343 #   include <time.h>
 344 #  endif
 345 # endif
 346 #endif
 347
 348 #ifdef HAVE_FCNTL_H
 349 # include <fcntl.h>
 350 #else
 351 # ifdef HAVE_SYS_FILE_H
 352 #  include <sys/file.h>
 353 # endif
 354 #endif
 355
 356 #ifndef SEEK_SET
 357 # define SEEK_SET 0
 358 # define SEEK_CUR 1
 359 # define SEEK_END 2
 360 #endif
 361 #ifndef F_OK
 362 # define F_OK 0
 363 # define X_OK 1
 364 # define W_OK 2
 365 # define R_OK 4
 366 #endif
 367 #ifndef O_RDONLY
 368 # define O_RDONLY 0
 369 #endif
 370 #ifndef O_WRONLY
 371 # define O_WRONLY 1
 372 #endif
 373 #ifndef O_BINARY
 374 # define O_BINARY 0
 375 #endif
 376
 377 /* Some systems define these in, e.g., param.h.  We undefine these names
 378    here to avoid the warnings.  We prefer to use our definitions since we
 379    know they are correct.  */
 380
 381 #undef MIN
 382 #undef MAX
 383 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 384 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 385
 386 /* Returns the least number N such that N * Y >= X.  */
 387 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 388
 389 /* This macro rounds x up to the y boundary.  */
 390 #define ROUND_UP(x,y) (((x) + (y) - 1) & ~((y) - 1))
 391
 392 /* This macro rounds x down to the y boundary.  */
 393 #define ROUND_DOWN(x,y) ((x) & ~((y) - 1))
 394
 395 #ifdef HAVE_SYS_WAIT_H
 396 #include <sys/wait.h>
 397 #endif
 398
 399 #ifndef WIFSIGNALED
 400 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 401 #endif
 402 #ifndef WTERMSIG
 403 #define WTERMSIG(S) ((S) & 0x7f)
 404 #endif
 405 #ifndef WIFEXITED
 406 #define WIFEXITED(S) (((S) & 0xff) == 0)
 407 #endif
 408 #ifndef WEXITSTATUS
 409 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 410 #endif
 411 #ifndef WSTOPSIG
 412 #define WSTOPSIG WEXITSTATUS
 413 #endif
 414 #ifndef WCOREDUMP
 415 #define WCOREDUMP(S) ((S) & WCOREFLG)
 416 #endif
 417 #ifndef WCOREFLG
 418 #define WCOREFLG 0200
 419 #endif
 420
 421 #include <signal.h>
 422 #if !defined (SIGCHLD) && defined (SIGCLD)
 423 # define SIGCHLD SIGCLD
 424 #endif
 425
 426 #ifdef HAVE_SYS_MMAN_H
 427 # include <sys/mman.h>
 428 #endif
 429
 430 #ifndef MAP_FAILED
 431 # define MAP_FAILED ((void *)-1)
 432 #endif
 433
 434 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
 435 # define MAP_ANONYMOUS MAP_ANON
 436 #endif
 437
 438 #ifdef HAVE_SYS_RESOURCE_H
 439 # include <sys/resource.h>
 440 #endif
 441
 442 #ifdef HAVE_SYS_TIMES_H
 443 # include <sys/times.h>
 444 #endif
 445
 446 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 447    are defined to 0 then we must provide the relevant declaration
 448    here.  These checks will be in the undefined state while configure
 449    is running so be careful to test "defined (HAVE_DECL_*)".  */
 450
 451 #ifdef __cplusplus
 452 extern "C" {
 453 #endif
 454
 455 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 456 extern double atof (const char *);
 457 #endif
 458
 459 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 460 extern long atol (const char *);
 461 #endif
 462
 463 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 464 extern void free (void *);
 465 #endif
 466
 467 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 468 extern char *getcwd (char *, size_t);
 469 #endif
 470
 471 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 472 extern char *getenv (const char *);
 473 #endif
 474
 475 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 476 extern int getopt (int, char * const *, const char *);
 477 #endif
 478
 479 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
 480 extern int getpagesize (void);
 481 #endif
 482
 483 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 484 extern char *getwd (char *);
 485 #endif
 486
 487 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 488 extern void *sbrk (int);
 489 #endif
 490
 491 #if defined (HAVE_DECL_SETENV) && !HAVE_DECL_SETENV
 492 int setenv(const char *, const char *, int);
 493 #endif
 494
 495 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 496 extern char *strstr (const char *, const char *);
 497 #endif
 498
 499 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
 500 extern char *stpcpy (char *, const char *);
 501 #endif
 502
 503 #if defined (HAVE_DECL_UNSETENV) && !HAVE_DECL_UNSETENV
 504 int unsetenv(const char *);
 505 #endif
 506
 507 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 508 extern void *malloc (size_t);
 509 #endif
 510
 511 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 512 extern void *calloc (size_t, size_t);
 513 #endif
 514
 515 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 516 extern void *realloc (void *, size_t);
 517 #endif
 518
 519 #ifdef __cplusplus
 520 }
 521 #endif
 522
 523 #ifdef HAVE_STDINT_H
 524 #include <stdint.h>
 525 #endif
 526
 527 #ifdef HAVE_INTTYPES_H
 528 #include <inttypes.h>
 529 #endif
 530
 531 #ifdef __cplusplus
 532 extern "C" {
 533 #endif
 534
 535 /* If the system doesn't provide strsignal, we get it defined in
 536    libiberty but no declaration is supplied.  */
 537 #if !defined (HAVE_STRSIGNAL) \
 538     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 539 # ifndef strsignal
 540 extern const char *strsignal (int);
 541 # endif
 542 #endif
 543
 544 #ifdef HAVE_GETRLIMIT
 545 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 546 #  ifndef getrlimit
 547 struct rlimit;
 548 extern int getrlimit (int, struct rlimit *);
 549 #  endif
 550 # endif
 551 #endif
 552
 553 #ifdef HAVE_SETRLIMIT
 554 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 555 #  ifndef setrlimit
 556 struct rlimit;
 557 extern int setrlimit (int, const struct rlimit *);
 558 #  endif
 559 # endif
 560 #endif
 561
 562 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 563 extern void abort (void);
 564 #endif
 565
 566 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 567 extern int snprintf (char *, size_t, const char *, ...);
 568 #endif
 569
 570 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 571 extern int vsnprintf (char *, size_t, const char *, va_list);
 572 #endif
 573
 574 #ifdef __cplusplus
 575 }
 576 #endif
 577
 578 /* 1 if we have C99 designated initializers.  */
 579 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 580 #define HAVE_DESIGNATED_INITIALIZERS \
 581   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 582    && !defined(__cplusplus))
 583 #endif
 584
 585 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 586 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 587   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 588    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 589 #endif
 590
 591 #if HAVE_SYS_STAT_H
 592 # include <sys/stat.h>
 593 #endif
 594
 595 /* Test if something is a normal file.  */
 596 #ifndef S_ISREG
 597 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 598 #endif
 599
 600 /* Test if something is a directory.  */
 601 #ifndef S_ISDIR
 602 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 603 #endif
 604
 605 /* Test if something is a character special file.  */
 606 #ifndef S_ISCHR
 607 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 608 #endif
 609
 610 /* Test if something is a block special file.  */
 611 #ifndef S_ISBLK
 612 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 613 #endif
 614
 615 /* Test if something is a socket.  */
 616 #ifndef S_ISSOCK
 617 # ifdef S_IFSOCK
 618 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 619 # else
 620 #   define S_ISSOCK(m) 0
 621 # endif
 622 #endif
 623
 624 /* Test if something is a FIFO.  */
 625 #ifndef S_ISFIFO
 626 # ifdef S_IFIFO
 627 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 628 # else
 629 #  define S_ISFIFO(m) 0
 630 # endif
 631 #endif
 632
 633 /* Define well known filenos if the system does not define them.  */
 634 #ifndef STDIN_FILENO
 635 # define STDIN_FILENO   0
 636 #endif
 637 #ifndef STDOUT_FILENO
 638 # define STDOUT_FILENO  1
 639 #endif
 640 #ifndef STDERR_FILENO
 641 # define STDERR_FILENO  2
 642 #endif
 643
 644 /* Some systems have mkdir that takes a single argument.  */
 645 #ifdef MKDIR_TAKES_ONE_ARG
 646 # define mkdir(a,b) mkdir (a)
 647 #endif
 648
 649 #ifndef HAVE_KILL
 650 # define kill(p,s) raise (s)
 651 #endif
 652
 653 /* Provide a way to print an address via printf.  */
 654 #ifndef HOST_PTR_PRINTF
 655 #define HOST_PTR_PRINTF "%p"
 656 #endif /* ! HOST_PTR_PRINTF */
 657
 658 /* By default, colon separates directories in a path.  */
 659 #ifndef PATH_SEPARATOR
 660 #define PATH_SEPARATOR ':'
 661 #endif
 662
 663 /* Filename handling macros.  */
 664 #include "filenames.h"
 665
 666 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 667 #ifndef DIR_SEPARATOR
 668 # define DIR_SEPARATOR '/'
 669 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 670 #  define DIR_SEPARATOR_2 '\\'
 671 # endif
 672 #endif
 673
 674 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 675 /* If plugin support is enabled, we could use libdl.  */
 676 #include <dlfcn.h>
 677 #endif
 678
 679 /* Do not introduce a gmp.h dependency on the build system.  */
 680 #ifndef GENERATOR_FILE
 681 #include <gmp.h>
 682 #endif
 683
 684 /* Get libiberty declarations.  */
 685 #include "libiberty.h"
 686
 687 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 688 #undef FLOAT /* Likewise.  */
 689 #undef ABS /* Likewise.  */
 690 #undef PC /* Likewise.  */
 691
 692 /* Provide a default for the HOST_BIT_BUCKET.
 693    This suffices for POSIX-like hosts.  */
 694
 695 #ifndef HOST_BIT_BUCKET
 696 #define HOST_BIT_BUCKET "/dev/null"
 697 #endif
 698
 699 #ifndef offsetof
 700 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 701 #endif
 702
 703 /* Various error reporting routines want to use __FUNCTION__.  */
 704 #if (GCC_VERSION < 2007)
 705 #ifndef __FUNCTION__
 706 #define __FUNCTION__ "?"
 707 #endif /* ! __FUNCTION__ */
 708 #endif
 709
 710 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 711    the most likely value of A is B.  This feature was added at some point
 712    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 713 #if (GCC_VERSION < 3000)
 714 #define __builtin_expect(a, b) (a)
 715 #endif
 716
 717 /* Redefine abort to report an internal error w/o coredump, and
 718    reporting the location of the error in the source file.  */
 719 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 720 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 721
 722 /* Use gcc_assert(EXPR) to test invariants.  */
 723 #if ENABLE_ASSERT_CHECKING
 724 #define gcc_assert(EXPR)                                                \
 725    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 726 #elif (GCC_VERSION >= 4005)
 727 #define gcc_assert(EXPR)                                                \
 728   ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
 729 #else
 730 /* Include EXPR, so that unused variable warnings do not occur.  */
 731 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 732 #endif
 733
 734 #if CHECKING_P
 735 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 736 #else
 737 /* N.B.: in release build EXPR is not evaluated.  */
 738 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 739 #endif
 740
 741 /* Use gcc_unreachable() to mark unreachable locations (like an
 742    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 743 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 744 #define gcc_unreachable() __builtin_unreachable ()
 745 #else
 746 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 747 #endif
 748
 749 #if GCC_VERSION >= 7000 && defined(__has_attribute)
 750 # if __has_attribute(fallthrough)
 751 #  define gcc_fallthrough() __attribute__((fallthrough))
 752 # else
 753 #  define gcc_fallthrough()
 754 # endif
 755 #else
 756 # define gcc_fallthrough()
 757 #endif
 758
 759 #if GCC_VERSION >= 3001
 760 #define STATIC_CONSTANT_P(X) (__builtin_constant_p (X) && (X))
 761 #else
 762 #define STATIC_CONSTANT_P(X) (false && (X))
 763 #endif
 764
 765 /* static_assert (COND, MESSAGE) is available in C++11 onwards.  */
 766 #if __cplusplus >= 201103L
 767 #define STATIC_ASSERT(X) \
 768   static_assert ((X), #X)
 769 #else
 770 #define STATIC_ASSERT(X) \
 771   typedef int assertion1[(X) ? 1 : -1] ATTRIBUTE_UNUSED
 772 #endif
 773
 774 /* Provide a fake boolean type.  We make no attempt to use the
 775    C99 _Bool, as it may not be available in the bootstrap compiler,
 776    and even if it is, it is liable to be buggy.
 777    This must be after all inclusion of system headers, as some of
 778    them will mess us up.  */
 779
 780 #undef TRUE
 781 #undef FALSE
 782
 783 #ifdef __cplusplus
 784   /* Obsolete.  */
 785 # define TRUE true
 786 # define FALSE false
 787 #else /* !__cplusplus */
 788 # undef bool
 789 # undef true
 790 # undef false
 791
 792 # define bool unsigned char
 793 # define true 1
 794 # define false 0
 795
 796   /* Obsolete.  */
 797 # define TRUE true
 798 # define FALSE false
 799 #endif /* !__cplusplus */
 800
 801 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 802 #define BOOL_BITFIELD unsigned int
 803
 804 /* As the last action in this file, we poison the identifiers that
 805    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 806    preprocessor won't trip on poisoned identifiers that arrive from
 807    the expansion of macros.  E.g. #define strrchr rindex, won't error
 808    if rindex is poisoned after this directive is issued and later on
 809    strrchr is called.
 810
 811    Note: We define bypass macros for the few cases where we really
 812    want to use the libc memory allocation routines.  Otherwise we
 813    insist you use the "x" versions from libiberty.  */
 814
 815 #define really_call_malloc malloc
 816 #define really_call_calloc calloc
 817 #define really_call_realloc realloc
 818
 819 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 820 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 821    really_call_* cannot be used in a .l or .y file.  */
 822 #define malloc xmalloc
 823 #define realloc xrealloc
 824 #endif
 825
 826 #if (GCC_VERSION >= 3000)
 827
 828 /* Note autoconf checks for prototype declarations and includes
 829    system.h while doing so.  Only poison these tokens if actually
 830    compiling gcc, so that the autoconf declaration tests for malloc
 831    etc don't spuriously fail.  */
 832 #ifdef IN_GCC
 833
 834 #ifndef USES_ISL
 835 #undef calloc
 836 #undef strdup
 837  #pragma GCC poison calloc strdup
 838 #endif
 839
 840 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 841 #undef malloc
 842 #undef realloc
 843  #pragma GCC poison malloc realloc
 844 #endif
 845
 846 /* The %m format should be used when GCC's main diagnostic functions
 847    supporting %m are available, and xstrerror from libiberty
 848    otherwise.  */
 849 #undef strerror
 850  #pragma GCC poison strerror
 851
 852 /* loc_t is defined on some systems and too inviting for some
 853    programmers to avoid.  */
 854 #undef loc_t
 855  #pragma GCC poison loc_t
 856
 857 /* Old target macros that have moved to the target hooks structure.  */
 858  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 859         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 860         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 861         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 862         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 863         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 864         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 865         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 866         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 867         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 868         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 869         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 870         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 871         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 872         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 873         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 874         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 875         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 876         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 877         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 878         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 879         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 880         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 881         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 882         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 883         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 884         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 885         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 886         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 887         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 888         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 889         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 890         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 891         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 892         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 893         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 894         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 895         OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
 896         ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK LIBGCC2_HAS_SF_MODE          \
 897         LIBGCC2_HAS_DF_MODE LIBGCC2_HAS_XF_MODE LIBGCC2_HAS_TF_MODE     \
 898         CLEAR_BY_PIECES_P MOVE_BY_PIECES_P SET_BY_PIECES_P              \
 899         STORE_BY_PIECES_P
 900
 901 /* Target macros only used for code built for the target, that have
 902    moved to libgcc-tm.h or have never been present elsewhere.  */
 903  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 904         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 905         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 906
 907 /* Other obsolete target macros, or macros that used to be in target
 908    headers and were not used, and may be obsolete or may never have
 909    been used.  */
 910  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 911         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 912         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 913         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 914         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 915         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 916         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 917         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 918         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 919         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 920         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 921         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 922         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 923         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 924         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 925         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 926         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 927         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 928         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 929         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 930         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 931         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 932         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 933         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 934         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 935         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 936         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 937         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 938         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 939         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 940         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 941         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 942         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 943         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 944         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 945         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 946         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 947         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 948         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 949         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 950         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 951         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 952         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 953         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 954         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 955         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 956         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 957         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 958         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 959         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 960         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 961         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 962         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 963         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 964         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 965         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 966         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 967         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 968         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 969         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 970         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT                    \
 971         LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO          \
 972         IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC    \
 973         DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT      \
 974         REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P                  \
 975         TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS       \
 976         IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP           \
 977         UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP                  \
 978         USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
 979         CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC                     \
 980         GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE              \
 981         ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS \
 982         REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P                        \
 983         CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT                      \
 984         REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT                 \
 985         EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT                       \
 986         EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P          \
 987         CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL                  \
 988         ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
 989         LIBGCC2_LONG_DOUBLE_TYPE_SIZE STRUCT_VALUE                         \
 990         EH_FRAME_IN_DATA_SECTION TARGET_FLT_EVAL_METHOD_NON_DEFAULT        \
 991         JCR_SECTION_NAME TARGET_USE_JCR_SECTION
 992
 993 /* Hooks that are no longer used.  */
 994  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 995         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 996         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 997         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 998         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 999         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
1000         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
1001         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
1002         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
1003         TARGET_IRA_COVER_CLASSES TARGET_HELP \
1004         TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
1005         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
1006         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
1007         TARGET_MD_ASM_CLOBBERS TARGET_RELAXED_ORDERING \
1008         EXTENDED_SDB_BASIC_TYPES TARGET_INVALID_PARAMETER_TYPE \
1009         TARGET_INVALID_RETURN_TYPE
1010
1011 /* Arrays that were deleted in favor of a functional interface.  */
1012  #pragma GCC poison built_in_decls implicit_built_in_decls
1013
1014 /* Hooks into libgcc2.  */
1015  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
1016    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
1017
1018 /* Miscellaneous macros that are no longer used.  */
1019  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
1020
1021 /* Libiberty macros that are no longer used in GCC.  */
1022 #undef ANSI_PROTOTYPES
1023 #undef PTR_CONST
1024 #undef LONG_DOUBLE
1025 #undef VPARAMS
1026 #undef VA_OPEN
1027 #undef VA_FIXEDARG
1028 #undef VA_CLOSE
1029 #undef VA_START
1030  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
1031   VA_FIXEDARG VA_CLOSE VA_START
1032 #endif /* IN_GCC */
1033
1034 /* Front ends should never have to include middle-end headers.  Enforce
1035    this by poisoning the header double-include protection defines.  */
1036 #ifdef IN_GCC_FRONTEND
1037 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
1038 #endif
1039
1040 /* Note: not all uses of the `index' token (e.g. variable names and
1041    structure members) have been eliminated.  */
1042 #undef bcopy
1043 #undef bzero
1044 #undef bcmp
1045 #undef rindex
1046  #pragma GCC poison bcopy bzero bcmp rindex
1047
1048 /* Poison ENABLE_CHECKING macro that should be replaced with
1049    'if (flag_checking)', or with CHECKING_P macro.  */
1050 #pragma GCC poison ENABLE_CHECKING
1051
1052 #endif /* GCC >= 3.0 */
1053
1054 /* This macro allows casting away const-ness to pass -Wcast-qual
1055    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
1056    only be used in certain specific cases.  One valid case is where
1057    the C standard definitions or prototypes force you to.  E.g. if you
1058    need to free a const object, or if you pass a const string to
1059    execv, et al.  Another valid use would be in an allocation function
1060    that creates const objects that need to be initialized.  In some
1061    cases we have non-const functions that return the argument
1062    (e.g. next_nonnote_insn).  Rather than create const shadow
1063    functions, we can cast away const-ness in calling these interfaces
1064    if we're careful to verify that the called function does indeed not
1065    modify its argument and the return value is only used in a const
1066    context.  (This can be somewhat dangerous as these assumptions can
1067    change after the fact).  Beyond these uses, most other cases of
1068    using this macro should be viewed with extreme caution.  */
1069
1070 #ifdef __cplusplus
1071 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
1072 #else
1073 #if defined(__GNUC__) && GCC_VERSION > 4000
1074 /* GCC 4.0.x has a bug where it may ICE on this expression,
1075    so does GCC 3.4.x (PR17436).  */
1076 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
1077 #elif defined(__GNUC__)
1078 static inline char *
1079 helper_const_non_const_cast (const char *p)
1080 {
1081   union {
1082     const char *const_c;
1083     char *c;
1084   } val;
1085   val.const_c = p;
1086   return val.c;
1087 }
1088
1089 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1090         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1091 #else
1092 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1093 #endif
1094 #endif
1095 #define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1096 #define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1097 #define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1098 #define CONST_CAST_RTX_INSN(X) CONST_CAST (struct rtx_insn *, (X))
1099 #define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1100 #define CONST_CAST_GIMPLE(X) CONST_CAST (gimple *, (X))
1101
1102 /* Activate certain diagnostics as warnings (not errors via the
1103    -Werror flag).  */
1104 #if GCC_VERSION >= 4003
1105 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1106    an error/-Werror).  */
1107 #ifndef ENABLE_ASSERT_CHECKING
1108 #pragma GCC diagnostic warning "-Wuninitialized"
1109 #endif
1110 #endif
1111
1112 #ifdef ENABLE_VALGRIND_ANNOTATIONS
1113 # ifdef HAVE_VALGRIND_MEMCHECK_H
1114 #  include <valgrind/memcheck.h>
1115 # elif defined HAVE_MEMCHECK_H
1116 #  include <memcheck.h>
1117 # else
1118 #  include <valgrind.h>
1119 # endif
1120 /* Compatibility macros to let valgrind 3.1 work.  */
1121 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1122 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1123 # endif
1124 # ifndef VALGRIND_MAKE_MEM_DEFINED
1125 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1126 # endif
1127 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1128 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1129 # endif
1130 #else
1131 /* Avoid #ifdef:s when we can help it.  */
1132 #define VALGRIND_DISCARD(x)
1133 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1134 #define VALGRIND_FREELIKE_BLOCK(x,y)
1135 #endif
1136
1137 /* In LTO -fwhole-program build we still want to keep the debug functions available
1138    for debugger.  Mark them as used to prevent removal.  */
1139 #if (GCC_VERSION > 4000)
1140 #define DEBUG_FUNCTION __attribute__ ((__used__))
1141 #define DEBUG_VARIABLE __attribute__ ((__used__))
1142 #else
1143 #define DEBUG_FUNCTION
1144 #define DEBUG_VARIABLE
1145 #endif
1146
1147 /* General macro to extract bit Y of X.  */
1148 #define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
1149
1150 /* Get definitions of HOST_WIDE_INT.  */
1151 #include "hwint.h"
1152
1153 #endif /* ! GCC_SYSTEM_H */