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