gcc/system.h

   1 /* Get common system includes and various definitions and declarations based
   2    on autoconf macros.
   3    Copyright (C) 1998-2014 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 /* There are an extraordinary number of issues with <ctype.h>.
 198    The last straw is that it varies with the locale.  Use libiberty's
 199    replacement instead.  */
 200 #include "safe-ctype.h"
 201
 202 #include <sys/types.h>
 203
 204 #include <errno.h>
 205
 206 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 207 extern int errno;
 208 #endif
 209
 210 #ifdef __cplusplus
 211 # include <cstring>
 212 #endif
 213
 214 /* Some of glibc's string inlines cause warnings.  Plus we'd rather
 215    rely on (and therefore test) GCC's string builtins.  */
 216 #define __NO_STRING_INLINES
 217
 218 #ifdef STRING_WITH_STRINGS
 219 # include <string.h>
 220 # include <strings.h>
 221 #else
 222 # ifdef HAVE_STRING_H
 223 #  include <string.h>
 224 # else
 225 #  ifdef HAVE_STRINGS_H
 226 #   include <strings.h>
 227 #  endif
 228 # endif
 229 #endif
 230
 231 #ifdef HAVE_STDLIB_H
 232 # include <stdlib.h>
 233 #endif
 234
 235 /* When compiling C++ we need to include <cstdlib> as well as <stdlib.h> so
 236    that it is processed before we poison "malloc"; otherwise, if a source
 237    file uses a standard library header that includes <cstdlib>, we will get
 238    an error about 'using std::malloc'.  */
 239 #ifdef __cplusplus
 240 #include <cstdlib>
 241 #endif
 242
 243 /* Undef vec_free from AIX stdlib.h header which conflicts with vec.h.  */
 244 #undef vec_free
 245
 246 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
 247    FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
 248    or 0 and 1 if those macros are not defined.  */
 249 #ifndef SUCCESS_EXIT_CODE
 250 # ifdef EXIT_SUCCESS
 251 #  define SUCCESS_EXIT_CODE EXIT_SUCCESS
 252 # else
 253 #  define SUCCESS_EXIT_CODE 0
 254 # endif
 255 #endif
 256
 257 #ifndef FATAL_EXIT_CODE
 258 # ifdef EXIT_FAILURE
 259 #  define FATAL_EXIT_CODE EXIT_FAILURE
 260 # else
 261 #  define FATAL_EXIT_CODE 1
 262 # endif
 263 #endif
 264
 265 #define ICE_EXIT_CODE 4
 266
 267 #ifdef HAVE_UNISTD_H
 268 # include <unistd.h>
 269 #endif
 270
 271 #ifdef HAVE_SYS_PARAM_H
 272 # include <sys/param.h>
 273 /* We use these identifiers later and they appear in some vendor param.h's.  */
 274 # undef PREFETCH
 275 # undef m_slot
 276 #endif
 277
 278 #if HAVE_LIMITS_H
 279 # include <limits.h>
 280 #endif
 281
 282 /* A macro to determine whether a VALUE lies inclusively within a
 283    certain range without evaluating the VALUE more than once.  This
 284    macro won't warn if the VALUE is unsigned and the LOWER bound is
 285    zero, as it would e.g. with "VALUE >= 0 && ...".  Note the LOWER
 286    bound *is* evaluated twice, and LOWER must not be greater than
 287    UPPER.  However the bounds themselves can be either positive or
 288    negative.  */
 289 #define IN_RANGE(VALUE, LOWER, UPPER) \
 290   ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
 291    <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
 292
 293 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 294    macros defined with these cannot be used in #if.  */
 295
 296 /* The extra casts work around common compiler bugs.  */
 297 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 298 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 299    It is necessary at least when t == time_t.  */
 300 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 301                              ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
 302 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 303
 304 /* Use that infrastructure to provide a few constants.  */
 305 #ifndef UCHAR_MAX
 306 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 307 #endif
 308
 309 #ifdef TIME_WITH_SYS_TIME
 310 # include <sys/time.h>
 311 # include <time.h>
 312 #else
 313 # if HAVE_SYS_TIME_H
 314 #  include <sys/time.h>
 315 # else
 316 #  ifdef HAVE_TIME_H
 317 #   include <time.h>
 318 #  endif
 319 # endif
 320 #endif
 321
 322 #ifdef HAVE_FCNTL_H
 323 # include <fcntl.h>
 324 #else
 325 # ifdef HAVE_SYS_FILE_H
 326 #  include <sys/file.h>
 327 # endif
 328 #endif
 329
 330 #ifndef SEEK_SET
 331 # define SEEK_SET 0
 332 # define SEEK_CUR 1
 333 # define SEEK_END 2
 334 #endif
 335 #ifndef F_OK
 336 # define F_OK 0
 337 # define X_OK 1
 338 # define W_OK 2
 339 # define R_OK 4
 340 #endif
 341 #ifndef O_RDONLY
 342 # define O_RDONLY 0
 343 #endif
 344 #ifndef O_WRONLY
 345 # define O_WRONLY 1
 346 #endif
 347 #ifndef O_BINARY
 348 # define O_BINARY 0
 349 #endif
 350
 351 /* Some systems define these in, e.g., param.h.  We undefine these names
 352    here to avoid the warnings.  We prefer to use our definitions since we
 353    know they are correct.  */
 354
 355 #undef MIN
 356 #undef MAX
 357 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 358 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 359
 360 /* Returns the least number N such that N * Y >= X.  */
 361 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 362
 363 #ifdef HAVE_SYS_WAIT_H
 364 #include <sys/wait.h>
 365 #endif
 366
 367 #ifndef WIFSIGNALED
 368 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 369 #endif
 370 #ifndef WTERMSIG
 371 #define WTERMSIG(S) ((S) & 0x7f)
 372 #endif
 373 #ifndef WIFEXITED
 374 #define WIFEXITED(S) (((S) & 0xff) == 0)
 375 #endif
 376 #ifndef WEXITSTATUS
 377 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 378 #endif
 379 #ifndef WSTOPSIG
 380 #define WSTOPSIG WEXITSTATUS
 381 #endif
 382 #ifndef WCOREDUMP
 383 #define WCOREDUMP(S) ((S) & WCOREFLG)
 384 #endif
 385 #ifndef WCOREFLG
 386 #define WCOREFLG 0200
 387 #endif
 388
 389 #include <signal.h>
 390 #if !defined (SIGCHLD) && defined (SIGCLD)
 391 # define SIGCHLD SIGCLD
 392 #endif
 393
 394 #ifdef HAVE_SYS_MMAN_H
 395 # include <sys/mman.h>
 396 #endif
 397
 398 #ifndef MAP_FAILED
 399 # define MAP_FAILED ((void *)-1)
 400 #endif
 401
 402 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
 403 # define MAP_ANONYMOUS MAP_ANON
 404 #endif
 405
 406 #ifdef HAVE_SYS_RESOURCE_H
 407 # include <sys/resource.h>
 408 #endif
 409
 410 #ifdef HAVE_SYS_TIMES_H
 411 # include <sys/times.h>
 412 #endif
 413
 414 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 415    are defined to 0 then we must provide the relevant declaration
 416    here.  These checks will be in the undefined state while configure
 417    is running so be careful to test "defined (HAVE_DECL_*)".  */
 418
 419 #ifdef __cplusplus
 420 extern "C" {
 421 #endif
 422
 423 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 424 extern double atof (const char *);
 425 #endif
 426
 427 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 428 extern long atol (const char *);
 429 #endif
 430
 431 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 432 extern void free (void *);
 433 #endif
 434
 435 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 436 extern char *getcwd (char *, size_t);
 437 #endif
 438
 439 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 440 extern char *getenv (const char *);
 441 #endif
 442
 443 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 444 extern int getopt (int, char * const *, const char *);
 445 #endif
 446
 447 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
 448 extern int getpagesize (void);
 449 #endif
 450
 451 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 452 extern char *getwd (char *);
 453 #endif
 454
 455 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 456 extern void *sbrk (int);
 457 #endif
 458
 459 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 460 extern char *strstr (const char *, const char *);
 461 #endif
 462
 463 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
 464 extern char *stpcpy (char *, const char *);
 465 #endif
 466
 467 #ifdef __cplusplus
 468 }
 469 #endif
 470
 471 #ifdef HAVE_MALLOC_H
 472 #include <malloc.h>
 473 #endif
 474
 475 #ifdef __cplusplus
 476 extern "C" {
 477 #endif
 478
 479 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 480 extern void *malloc (size_t);
 481 #endif
 482
 483 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 484 extern void *calloc (size_t, size_t);
 485 #endif
 486
 487 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 488 extern void *realloc (void *, size_t);
 489 #endif
 490
 491 #ifdef __cplusplus
 492 }
 493 #endif
 494
 495 #ifdef HAVE_STDINT_H
 496 #include <stdint.h>
 497 #endif
 498
 499 #ifdef HAVE_INTTYPES_H
 500 #include <inttypes.h>
 501 #endif
 502
 503 #ifdef __cplusplus
 504 extern "C" {
 505 #endif
 506
 507 /* If the system doesn't provide strsignal, we get it defined in
 508    libiberty but no declaration is supplied.  */
 509 #if !defined (HAVE_STRSIGNAL) \
 510     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 511 # ifndef strsignal
 512 extern const char *strsignal (int);
 513 # endif
 514 #endif
 515
 516 #ifdef HAVE_GETRLIMIT
 517 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 518 #  ifndef getrlimit
 519 struct rlimit;
 520 extern int getrlimit (int, struct rlimit *);
 521 #  endif
 522 # endif
 523 #endif
 524
 525 #ifdef HAVE_SETRLIMIT
 526 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 527 #  ifndef setrlimit
 528 struct rlimit;
 529 extern int setrlimit (int, const struct rlimit *);
 530 #  endif
 531 # endif
 532 #endif
 533
 534 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 535 extern void abort (void);
 536 #endif
 537
 538 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 539 extern int snprintf (char *, size_t, const char *, ...);
 540 #endif
 541
 542 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 543 extern int vsnprintf (char *, size_t, const char *, va_list);
 544 #endif
 545
 546 #ifdef __cplusplus
 547 }
 548 #endif
 549
 550 /* 1 if we have C99 designated initializers.  */
 551 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 552 #define HAVE_DESIGNATED_INITIALIZERS \
 553   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 554    && !defined(__cplusplus))
 555 #endif
 556
 557 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 558 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 559   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 560    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 561 #endif
 562
 563 #if HAVE_SYS_STAT_H
 564 # include <sys/stat.h>
 565 #endif
 566
 567 /* Test if something is a normal file.  */
 568 #ifndef S_ISREG
 569 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 570 #endif
 571
 572 /* Test if something is a directory.  */
 573 #ifndef S_ISDIR
 574 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 575 #endif
 576
 577 /* Test if something is a character special file.  */
 578 #ifndef S_ISCHR
 579 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 580 #endif
 581
 582 /* Test if something is a block special file.  */
 583 #ifndef S_ISBLK
 584 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 585 #endif
 586
 587 /* Test if something is a socket.  */
 588 #ifndef S_ISSOCK
 589 # ifdef S_IFSOCK
 590 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 591 # else
 592 #   define S_ISSOCK(m) 0
 593 # endif
 594 #endif
 595
 596 /* Test if something is a FIFO.  */
 597 #ifndef S_ISFIFO
 598 # ifdef S_IFIFO
 599 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 600 # else
 601 #  define S_ISFIFO(m) 0
 602 # endif
 603 #endif
 604
 605 /* Define well known filenos if the system does not define them.  */
 606 #ifndef STDIN_FILENO
 607 # define STDIN_FILENO   0
 608 #endif
 609 #ifndef STDOUT_FILENO
 610 # define STDOUT_FILENO  1
 611 #endif
 612 #ifndef STDERR_FILENO
 613 # define STDERR_FILENO  2
 614 #endif
 615
 616 /* Some systems have mkdir that takes a single argument.  */
 617 #ifdef MKDIR_TAKES_ONE_ARG
 618 # define mkdir(a,b) mkdir (a)
 619 #endif
 620
 621 #ifndef HAVE_KILL
 622 # define kill(p,s) raise (s)
 623 #endif
 624
 625 /* Provide a way to print an address via printf.  */
 626 #ifndef HOST_PTR_PRINTF
 627 #define HOST_PTR_PRINTF "%p"
 628 #endif /* ! HOST_PTR_PRINTF */
 629
 630 /* By default, colon separates directories in a path.  */
 631 #ifndef PATH_SEPARATOR
 632 #define PATH_SEPARATOR ':'
 633 #endif
 634
 635 /* Filename handling macros.  */
 636 #include "filenames.h"
 637
 638 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 639 #ifndef DIR_SEPARATOR
 640 # define DIR_SEPARATOR '/'
 641 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 642 #  define DIR_SEPARATOR_2 '\\'
 643 # endif
 644 #endif
 645
 646 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 647 /* If plugin support is enabled, we could use libdl.  */
 648 #include <dlfcn.h>
 649 #endif
 650
 651 /* Do not introduce a gmp.h dependency on the build system.  */
 652 #ifndef GENERATOR_FILE
 653 #include <gmp.h>
 654 #endif
 655
 656 /* Get libiberty declarations.  */
 657 #include "libiberty.h"
 658
 659 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 660 #undef FLOAT /* Likewise.  */
 661 #undef ABS /* Likewise.  */
 662 #undef PC /* Likewise.  */
 663
 664 /* Provide a default for the HOST_BIT_BUCKET.
 665    This suffices for POSIX-like hosts.  */
 666
 667 #ifndef HOST_BIT_BUCKET
 668 #define HOST_BIT_BUCKET "/dev/null"
 669 #endif
 670
 671 #ifndef offsetof
 672 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 673 #endif
 674
 675 /* Various error reporting routines want to use __FUNCTION__.  */
 676 #if (GCC_VERSION < 2007)
 677 #ifndef __FUNCTION__
 678 #define __FUNCTION__ "?"
 679 #endif /* ! __FUNCTION__ */
 680 #endif
 681
 682 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 683    the most likely value of A is B.  This feature was added at some point
 684    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 685 #if (GCC_VERSION < 3000)
 686 #define __builtin_expect(a, b) (a)
 687 #endif
 688
 689 /* Redefine abort to report an internal error w/o coredump, and
 690    reporting the location of the error in the source file.  */
 691 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 692 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 693
 694 /* Use gcc_assert(EXPR) to test invariants.  */
 695 #if ENABLE_ASSERT_CHECKING
 696 #define gcc_assert(EXPR)                                                \
 697    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 698 #elif (GCC_VERSION >= 4005)
 699 #define gcc_assert(EXPR)                                                \
 700   ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
 701 #else
 702 /* Include EXPR, so that unused variable warnings do not occur.  */
 703 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 704 #endif
 705
 706 #ifdef ENABLE_CHECKING
 707 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 708 #else
 709 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 710 #endif
 711
 712 /* Use gcc_unreachable() to mark unreachable locations (like an
 713    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 714 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 715 #define gcc_unreachable() __builtin_unreachable ()
 716 #else
 717 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 718 #endif
 719
 720 #if GCC_VERSION >= 3001
 721 #define STATIC_CONSTANT_P(X) (__builtin_constant_p (X) && (X))
 722 #else
 723 #define STATIC_CONSTANT_P(X) (false && (X))
 724 #endif
 725
 726 /* Until we can use C++11's static_assert.  */
 727 #define STATIC_ASSERT(X) \
 728   typedef int assertion1[(X) ? 1 : -1] ATTRIBUTE_UNUSED
 729
 730 /* Provide a fake boolean type.  We make no attempt to use the
 731    C99 _Bool, as it may not be available in the bootstrap compiler,
 732    and even if it is, it is liable to be buggy.
 733    This must be after all inclusion of system headers, as some of
 734    them will mess us up.  */
 735
 736 #undef TRUE
 737 #undef FALSE
 738
 739 #ifdef __cplusplus
 740   /* Obsolete.  */
 741 # define TRUE true
 742 # define FALSE false
 743 #else /* !__cplusplus */
 744 # undef bool
 745 # undef true
 746 # undef false
 747
 748 # define bool unsigned char
 749 # define true 1
 750 # define false 0
 751
 752   /* Obsolete.  */
 753 # define TRUE true
 754 # define FALSE false
 755 #endif /* !__cplusplus */
 756
 757 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 758 #define BOOL_BITFIELD unsigned int
 759
 760 /* As the last action in this file, we poison the identifiers that
 761    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 762    preprocessor won't trip on poisoned identifiers that arrive from
 763    the expansion of macros.  E.g. #define strrchr rindex, won't error
 764    if rindex is poisoned after this directive is issued and later on
 765    strrchr is called.
 766
 767    Note: We define bypass macros for the few cases where we really
 768    want to use the libc memory allocation routines.  Otherwise we
 769    insist you use the "x" versions from libiberty.  */
 770
 771 #define really_call_malloc malloc
 772 #define really_call_calloc calloc
 773 #define really_call_realloc realloc
 774
 775 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 776 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 777    really_call_* cannot be used in a .l or .y file.  */
 778 #define malloc xmalloc
 779 #define realloc xrealloc
 780 #endif
 781
 782 #if (GCC_VERSION >= 3000)
 783
 784 /* Note autoconf checks for prototype declarations and includes
 785    system.h while doing so.  Only poison these tokens if actually
 786    compiling gcc, so that the autoconf declaration tests for malloc
 787    etc don't spuriously fail.  */
 788 #ifdef IN_GCC
 789 #undef calloc
 790 #undef strdup
 791  #pragma GCC poison calloc strdup
 792
 793 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 794 #undef malloc
 795 #undef realloc
 796  #pragma GCC poison malloc realloc
 797 #endif
 798
 799 /* The %m format should be used when GCC's main diagnostic functions
 800    supporting %m are available, and xstrerror from libiberty
 801    otherwise.  */
 802 #undef strerror
 803  #pragma GCC poison strerror
 804
 805 /* loc_t is defined on some systems and too inviting for some
 806    programmers to avoid.  */
 807 #undef loc_t
 808  #pragma GCC poison loc_t
 809
 810 /* Old target macros that have moved to the target hooks structure.  */
 811  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 812         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 813         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 814         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 815         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 816         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 817         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 818         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 819         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 820         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 821         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 822         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 823         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 824         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 825         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 826         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 827         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 828         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 829         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 830         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 831         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 832         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 833         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 834         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 835         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 836         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 837         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 838         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 839         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 840         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 841         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 842         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 843         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 844         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 845         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 846         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 847         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 848         OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
 849         ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK LIBGCC2_HAS_SF_MODE          \
 850         LIBGCC2_HAS_DF_MODE LIBGCC2_HAS_XF_MODE LIBGCC2_HAS_TF_MODE
 851
 852 /* Target macros only used for code built for the target, that have
 853    moved to libgcc-tm.h or have never been present elsewhere.  */
 854  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 855         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 856         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 857
 858 /* Other obsolete target macros, or macros that used to be in target
 859    headers and were not used, and may be obsolete or may never have
 860    been used.  */
 861  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 862         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 863         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 864         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 865         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 866         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 867         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 868         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 869         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 870         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 871         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 872         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 873         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 874         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 875         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 876         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 877         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 878         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 879         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 880         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 881         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 882         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 883         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 884         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 885         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 886         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 887         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 888         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 889         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 890         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 891         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 892         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 893         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 894         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 895         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 896         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 897         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 898         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 899         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 900         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 901         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 902         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 903         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 904         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 905         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 906         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 907         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 908         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 909         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 910         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 911         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 912         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 913         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 914         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 915         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 916         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 917         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 918         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 919         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 920         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 921         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT                    \
 922         LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO          \
 923         IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC    \
 924         DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT      \
 925         REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P                  \
 926         TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS       \
 927         IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP           \
 928         UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP                  \
 929         USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
 930         CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC                     \
 931         GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE              \
 932         ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS \
 933         REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P                        \
 934         CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT                      \
 935         REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT                 \
 936         EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT                       \
 937         EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P          \
 938         CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL                  \
 939         ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
 940         LIBGCC2_LONG_DOUBLE_TYPE_SIZE
 941
 942 /* Hooks that are no longer used.  */
 943  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 944         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 945         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 946         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 947         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 948         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
 949         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
 950         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
 951         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
 952         TARGET_IRA_COVER_CLASSES TARGET_HELP \
 953         TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
 954         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
 955         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
 956
 957 /* Arrays that were deleted in favor of a functional interface.  */
 958  #pragma GCC poison built_in_decls implicit_built_in_decls
 959
 960 /* Hooks into libgcc2.  */
 961  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
 962    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 963
 964 /* Miscellaneous macros that are no longer used.  */
 965  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
 966
 967 /* Libiberty macros that are no longer used in GCC.  */
 968 #undef ANSI_PROTOTYPES
 969 #undef PTR_CONST
 970 #undef LONG_DOUBLE
 971 #undef VPARAMS
 972 #undef VA_OPEN
 973 #undef VA_FIXEDARG
 974 #undef VA_CLOSE
 975 #undef VA_START
 976  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 977   VA_FIXEDARG VA_CLOSE VA_START
 978 #endif /* IN_GCC */
 979
 980 /* Front ends should never have to include middle-end headers.  Enforce
 981    this by poisoning the header double-include protection defines.  */
 982 #ifdef IN_GCC_FRONTEND
 983 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
 984 #endif
 985
 986 /* Note: not all uses of the `index' token (e.g. variable names and
 987    structure members) have been eliminated.  */
 988 #undef bcopy
 989 #undef bzero
 990 #undef bcmp
 991 #undef rindex
 992  #pragma GCC poison bcopy bzero bcmp rindex
 993
 994 #endif /* GCC >= 3.0 */
 995
 996 /* This macro allows casting away const-ness to pass -Wcast-qual
 997    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
 998    only be used in certain specific cases.  One valid case is where
 999    the C standard definitions or prototypes force you to.  E.g. if you
1000    need to free a const object, or if you pass a const string to
1001    execv, et al.  Another valid use would be in an allocation function
1002    that creates const objects that need to be initialized.  In some
1003    cases we have non-const functions that return the argument
1004    (e.g. next_nonnote_insn).  Rather than create const shadow
1005    functions, we can cast away const-ness in calling these interfaces
1006    if we're careful to verify that the called function does indeed not
1007    modify its argument and the return value is only used in a const
1008    context.  (This can be somewhat dangerous as these assumptions can
1009    change after the fact).  Beyond these uses, most other cases of
1010    using this macro should be viewed with extreme caution.  */
1011
1012 #ifdef __cplusplus
1013 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
1014 #else
1015 #if defined(__GNUC__) && GCC_VERSION > 4000
1016 /* GCC 4.0.x has a bug where it may ICE on this expression,
1017    so does GCC 3.4.x (PR17436).  */
1018 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
1019 #elif defined(__GNUC__)
1020 static inline char *
1021 helper_const_non_const_cast (const char *p)
1022 {
1023   union {
1024     const char *const_c;
1025     char *c;
1026   } val;
1027   val.const_c = p;
1028   return val.c;
1029 }
1030
1031 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1032         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1033 #else
1034 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1035 #endif
1036 #endif
1037 #define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1038 #define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1039 #define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1040 #define CONST_CAST_RTX_INSN(X) CONST_CAST (struct rtx_insn *, (X))
1041 #define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1042 #define CONST_CAST_GIMPLE(X) CONST_CAST (struct gimple_statement_base *, (X))
1043
1044 /* Activate certain diagnostics as warnings (not errors via the
1045    -Werror flag).  */
1046 #if GCC_VERSION >= 4003
1047 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1048    an error/-Werror).  */
1049 #ifndef ENABLE_ASSERT_CHECKING
1050 #pragma GCC diagnostic warning "-Wuninitialized"
1051 #endif
1052 #endif
1053
1054 #ifdef ENABLE_VALGRIND_ANNOTATIONS
1055 # ifdef HAVE_VALGRIND_MEMCHECK_H
1056 #  include <valgrind/memcheck.h>
1057 # elif defined HAVE_MEMCHECK_H
1058 #  include <memcheck.h>
1059 # else
1060 #  include <valgrind.h>
1061 # endif
1062 /* Compatibility macros to let valgrind 3.1 work.  */
1063 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1064 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1065 # endif
1066 # ifndef VALGRIND_MAKE_MEM_DEFINED
1067 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1068 # endif
1069 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1070 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1071 # endif
1072 #else
1073 /* Avoid #ifdef:s when we can help it.  */
1074 #define VALGRIND_DISCARD(x)
1075 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1076 #define VALGRIND_FREELIKE_BLOCK(x,y)
1077 #endif
1078
1079 /* In LTO -fwhole-program build we still want to keep the debug functions available
1080    for debugger.  Mark them as used to prevent removal.  */
1081 #if (GCC_VERSION > 4000)
1082 #define DEBUG_FUNCTION __attribute__ ((__used__))
1083 #define DEBUG_VARIABLE __attribute__ ((__used__))
1084 #else
1085 #define DEBUG_FUNCTION
1086 #define DEBUG_VARIABLE
1087 #endif
1088
1089 /* General macro to extract bit Y of X.  */
1090 #define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
1091
1092 /* Get definitions of HOST_WIDE_INT.  */
1093 #include "hwint.h"
1094
1095 #endif /* ! GCC_SYSTEM_H */