gcc/system.h

   1 /* Get common system includes and various definitions and declarations based
   2    on autoconf macros.
   3    Copyright (C) 1998-2015 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21
  22 #ifndef GCC_SYSTEM_H
  23 #define GCC_SYSTEM_H
  24
  25 /* Define this so that inttypes.h defines the PRI?64 macros even
  26    when compiling with a C++ compiler.  Define it here so in the
  27    event inttypes.h gets pulled in by another header it is already
  28    defined.  */
  29 #define __STDC_FORMAT_MACROS
  30
  31 /* We must include stdarg.h before stdio.h.  */
  32 #include <stdarg.h>
  33
  34 #ifndef va_copy
  35 # ifdef __va_copy
  36 #   define va_copy(d,s)  __va_copy (d, s)
  37 # else
  38 #   define va_copy(d,s)  ((d) = (s))
  39 # endif
  40 #endif
  41
  42 #ifdef HAVE_STDDEF_H
  43 # include <stddef.h>
  44 #endif
  45
  46 #include <stdio.h>
  47
  48 /* Define a generic NULL if one hasn't already been defined.  */
  49 #ifndef NULL
  50 #define NULL 0
  51 #endif
  52
  53 /* Use the unlocked open routines from libiberty.  */
  54
  55 /* Some of these are #define on some systems, e.g. on AIX to redirect
  56    the names to 64bit capable functions for LARGE_FILES support. These
  57    redefs are pointless here so we can override them.  */
  58
  59 #undef fopen
  60 #undef freopen
  61
  62 #define fopen(PATH, MODE) fopen_unlocked (PATH, MODE)
  63 #define fdopen(FILDES, MODE) fdopen_unlocked (FILDES, MODE)
  64 #define freopen(PATH, MODE, STREAM) freopen_unlocked (PATH, MODE, STREAM)
  65
  66 /* The compiler is not a multi-threaded application and therefore we
  67    do not have to use the locking functions.  In fact, using the locking
  68    functions can cause the compiler to be significantly slower under
  69    I/O bound conditions (such as -g -O0 on very large source files).
  70
  71    HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
  72    code is multi-thread safe by default.  If it is set to 0, then do
  73    not worry about using the _unlocked functions.
  74
  75    fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
  76    extensions and need to be prototyped by hand (since we do not
  77    define _GNU_SOURCE).  */
  78
  79 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
  80
  81 # ifdef HAVE_PUTC_UNLOCKED
  82 #  undef putc
  83 #  define putc(C, Stream) putc_unlocked (C, Stream)
  84 # endif
  85 # ifdef HAVE_PUTCHAR_UNLOCKED
  86 #  undef putchar
  87 #  define putchar(C) putchar_unlocked (C)
  88 # endif
  89 # ifdef HAVE_GETC_UNLOCKED
  90 #  undef getc
  91 #  define getc(Stream) getc_unlocked (Stream)
  92 # endif
  93 # ifdef HAVE_GETCHAR_UNLOCKED
  94 #  undef getchar
  95 #  define getchar() getchar_unlocked ()
  96 # endif
  97 # ifdef HAVE_FPUTC_UNLOCKED
  98 #  undef fputc
  99 #  define fputc(C, Stream) fputc_unlocked (C, Stream)
 100 # endif
 101
 102 #ifdef __cplusplus
 103 extern "C" {
 104 #endif
 105
 106 # ifdef HAVE_CLEARERR_UNLOCKED
 107 #  undef clearerr
 108 #  define clearerr(Stream) clearerr_unlocked (Stream)
 109 #  if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED
 110 extern void clearerr_unlocked (FILE *);
 111 #  endif
 112 # endif
 113 # ifdef HAVE_FEOF_UNLOCKED
 114 #  undef feof
 115 #  define feof(Stream) feof_unlocked (Stream)
 116 #  if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED
 117 extern int feof_unlocked (FILE *);
 118 #  endif
 119 # endif
 120 # ifdef HAVE_FILENO_UNLOCKED
 121 #  undef fileno
 122 #  define fileno(Stream) fileno_unlocked (Stream)
 123 #  if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED
 124 extern int fileno_unlocked (FILE *);
 125 #  endif
 126 # endif
 127 # ifdef HAVE_FFLUSH_UNLOCKED
 128 #  undef fflush
 129 #  define fflush(Stream) fflush_unlocked (Stream)
 130 #  if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED
 131 extern int fflush_unlocked (FILE *);
 132 #  endif
 133 # endif
 134 # ifdef HAVE_FGETC_UNLOCKED
 135 #  undef fgetc
 136 #  define fgetc(Stream) fgetc_unlocked (Stream)
 137 #  if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED
 138 extern int fgetc_unlocked (FILE *);
 139 #  endif
 140 # endif
 141 # ifdef HAVE_FGETS_UNLOCKED
 142 #  undef fgets
 143 #  define fgets(S, n, Stream) fgets_unlocked (S, n, Stream)
 144 #  if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED
 145 extern char *fgets_unlocked (char *, int, FILE *);
 146 #  endif
 147 # endif
 148 # ifdef HAVE_FPUTS_UNLOCKED
 149 #  undef fputs
 150 #  define fputs(String, Stream) fputs_unlocked (String, Stream)
 151 #  if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
 152 extern int fputs_unlocked (const char *, FILE *);
 153 #  endif
 154 # endif
 155 # ifdef HAVE_FERROR_UNLOCKED
 156 #  undef ferror
 157 #  define ferror(Stream) ferror_unlocked (Stream)
 158 #  if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED
 159 extern int ferror_unlocked (FILE *);
 160 #  endif
 161 # endif
 162 # ifdef HAVE_FREAD_UNLOCKED
 163 #  undef fread
 164 #  define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream)
 165 #  if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED
 166 extern size_t fread_unlocked (void *, size_t, size_t, FILE *);
 167 #  endif
 168 # endif
 169 # ifdef HAVE_FWRITE_UNLOCKED
 170 #  undef fwrite
 171 #  define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
 172 #  if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
 173 extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *);
 174 #  endif
 175 # endif
 176 # ifdef HAVE_FPRINTF_UNLOCKED
 177 #  undef fprintf
 178 /* We can't use a function-like macro here because we don't know if
 179    we have varargs macros.  */
 180 #  define fprintf fprintf_unlocked
 181 #  if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
 182 extern int fprintf_unlocked (FILE *, const char *, ...);
 183 #  endif
 184 # endif
 185
 186 #ifdef __cplusplus
 187 }
 188 #endif
 189
 190 #endif
 191
 192 /* ??? Glibc's fwrite/fread_unlocked macros cause
 193    "warning: signed and unsigned type in conditional expression".  */
 194 #undef fread_unlocked
 195 #undef fwrite_unlocked
 196
 197 /* Include <string> before "safe-ctype.h" to avoid GCC poisoning
 198    the ctype macros through safe-ctype.h */
 199
 200 #ifdef __cplusplus
 201 # include <string>
 202 #endif
 203
 204 /* There are an extraordinary number of issues with <ctype.h>.
 205    The last straw is that it varies with the locale.  Use libiberty's
 206    replacement instead.  */
 207 #include "safe-ctype.h"
 208
 209 #include <sys/types.h>
 210
 211 #include <errno.h>
 212
 213 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 214 extern int errno;
 215 #endif
 216
 217 #ifdef __cplusplus
 218 # include <algorithm>
 219 # include <cstring>
 220 # include <utility>
 221 #endif
 222
 223 /* Some of glibc's string inlines cause warnings.  Plus we'd rather
 224    rely on (and therefore test) GCC's string builtins.  */
 225 #define __NO_STRING_INLINES
 226
 227 #ifdef STRING_WITH_STRINGS
 228 # include <string.h>
 229 # include <strings.h>
 230 #else
 231 # ifdef HAVE_STRING_H
 232 #  include <string.h>
 233 # else
 234 #  ifdef HAVE_STRINGS_H
 235 #   include <strings.h>
 236 #  endif
 237 # endif
 238 #endif
 239
 240 #ifdef HAVE_STDLIB_H
 241 # include <stdlib.h>
 242 #endif
 243
 244 /* When compiling C++ we need to include <cstdlib> as well as <stdlib.h> so
 245    that it is processed before we poison "malloc"; otherwise, if a source
 246    file uses a standard library header that includes <cstdlib>, we will get
 247    an error about 'using std::malloc'.  */
 248 #ifdef __cplusplus
 249 #include <cstdlib>
 250 #endif
 251
 252 /* Undef vec_free from AIX stdlib.h header which conflicts with vec.h.  */
 253 #undef vec_free
 254
 255 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
 256    FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
 257    or 0 and 1 if those macros are not defined.  */
 258 #ifndef SUCCESS_EXIT_CODE
 259 # ifdef EXIT_SUCCESS
 260 #  define SUCCESS_EXIT_CODE EXIT_SUCCESS
 261 # else
 262 #  define SUCCESS_EXIT_CODE 0
 263 # endif
 264 #endif
 265
 266 #ifndef FATAL_EXIT_CODE
 267 # ifdef EXIT_FAILURE
 268 #  define FATAL_EXIT_CODE EXIT_FAILURE
 269 # else
 270 #  define FATAL_EXIT_CODE 1
 271 # endif
 272 #endif
 273
 274 #define ICE_EXIT_CODE 4
 275
 276 #ifdef HAVE_UNISTD_H
 277 # include <unistd.h>
 278 #endif
 279
 280 #ifdef HAVE_SYS_PARAM_H
 281 # include <sys/param.h>
 282 /* We use these identifiers later and they appear in some vendor param.h's.  */
 283 # undef PREFETCH
 284 # undef m_slot
 285 #endif
 286
 287 #if HAVE_LIMITS_H
 288 # include <limits.h>
 289 #endif
 290
 291 /* A macro to determine whether a VALUE lies inclusively within a
 292    certain range without evaluating the VALUE more than once.  This
 293    macro won't warn if the VALUE is unsigned and the LOWER bound is
 294    zero, as it would e.g. with "VALUE >= 0 && ...".  Note the LOWER
 295    bound *is* evaluated twice, and LOWER must not be greater than
 296    UPPER.  However the bounds themselves can be either positive or
 297    negative.  */
 298 #define IN_RANGE(VALUE, LOWER, UPPER) \
 299   ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
 300    <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
 301
 302 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 303    macros defined with these cannot be used in #if.  */
 304
 305 /* The extra casts work around common compiler bugs.  */
 306 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 307 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 308    It is necessary at least when t == time_t.  */
 309 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 310                              ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
 311 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 312
 313 /* Use that infrastructure to provide a few constants.  */
 314 #ifndef UCHAR_MAX
 315 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 316 #endif
 317
 318 #ifdef TIME_WITH_SYS_TIME
 319 # include <sys/time.h>
 320 # include <time.h>
 321 #else
 322 # if HAVE_SYS_TIME_H
 323 #  include <sys/time.h>
 324 # else
 325 #  ifdef HAVE_TIME_H
 326 #   include <time.h>
 327 #  endif
 328 # endif
 329 #endif
 330
 331 #ifdef HAVE_FCNTL_H
 332 # include <fcntl.h>
 333 #else
 334 # ifdef HAVE_SYS_FILE_H
 335 #  include <sys/file.h>
 336 # endif
 337 #endif
 338
 339 #ifndef SEEK_SET
 340 # define SEEK_SET 0
 341 # define SEEK_CUR 1
 342 # define SEEK_END 2
 343 #endif
 344 #ifndef F_OK
 345 # define F_OK 0
 346 # define X_OK 1
 347 # define W_OK 2
 348 # define R_OK 4
 349 #endif
 350 #ifndef O_RDONLY
 351 # define O_RDONLY 0
 352 #endif
 353 #ifndef O_WRONLY
 354 # define O_WRONLY 1
 355 #endif
 356 #ifndef O_BINARY
 357 # define O_BINARY 0
 358 #endif
 359
 360 /* Some systems define these in, e.g., param.h.  We undefine these names
 361    here to avoid the warnings.  We prefer to use our definitions since we
 362    know they are correct.  */
 363
 364 #undef MIN
 365 #undef MAX
 366 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 367 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 368
 369 /* Returns the least number N such that N * Y >= X.  */
 370 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 371
 372 #ifdef HAVE_SYS_WAIT_H
 373 #include <sys/wait.h>
 374 #endif
 375
 376 #ifndef WIFSIGNALED
 377 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 378 #endif
 379 #ifndef WTERMSIG
 380 #define WTERMSIG(S) ((S) & 0x7f)
 381 #endif
 382 #ifndef WIFEXITED
 383 #define WIFEXITED(S) (((S) & 0xff) == 0)
 384 #endif
 385 #ifndef WEXITSTATUS
 386 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 387 #endif
 388 #ifndef WSTOPSIG
 389 #define WSTOPSIG WEXITSTATUS
 390 #endif
 391 #ifndef WCOREDUMP
 392 #define WCOREDUMP(S) ((S) & WCOREFLG)
 393 #endif
 394 #ifndef WCOREFLG
 395 #define WCOREFLG 0200
 396 #endif
 397
 398 #include <signal.h>
 399 #if !defined (SIGCHLD) && defined (SIGCLD)
 400 # define SIGCHLD SIGCLD
 401 #endif
 402
 403 #ifdef HAVE_SYS_MMAN_H
 404 # include <sys/mman.h>
 405 #endif
 406
 407 #ifndef MAP_FAILED
 408 # define MAP_FAILED ((void *)-1)
 409 #endif
 410
 411 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
 412 # define MAP_ANONYMOUS MAP_ANON
 413 #endif
 414
 415 #ifdef HAVE_SYS_RESOURCE_H
 416 # include <sys/resource.h>
 417 #endif
 418
 419 #ifdef HAVE_SYS_TIMES_H
 420 # include <sys/times.h>
 421 #endif
 422
 423 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 424    are defined to 0 then we must provide the relevant declaration
 425    here.  These checks will be in the undefined state while configure
 426    is running so be careful to test "defined (HAVE_DECL_*)".  */
 427
 428 #ifdef __cplusplus
 429 extern "C" {
 430 #endif
 431
 432 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 433 extern double atof (const char *);
 434 #endif
 435
 436 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 437 extern long atol (const char *);
 438 #endif
 439
 440 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 441 extern void free (void *);
 442 #endif
 443
 444 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 445 extern char *getcwd (char *, size_t);
 446 #endif
 447
 448 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 449 extern char *getenv (const char *);
 450 #endif
 451
 452 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 453 extern int getopt (int, char * const *, const char *);
 454 #endif
 455
 456 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
 457 extern int getpagesize (void);
 458 #endif
 459
 460 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 461 extern char *getwd (char *);
 462 #endif
 463
 464 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 465 extern void *sbrk (int);
 466 #endif
 467
 468 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 469 extern char *strstr (const char *, const char *);
 470 #endif
 471
 472 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
 473 extern char *stpcpy (char *, const char *);
 474 #endif
 475
 476 #ifdef __cplusplus
 477 }
 478 #endif
 479
 480 #ifdef HAVE_MALLOC_H
 481 #include <malloc.h>
 482 #endif
 483
 484 #ifdef __cplusplus
 485 extern "C" {
 486 #endif
 487
 488 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 489 extern void *malloc (size_t);
 490 #endif
 491
 492 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 493 extern void *calloc (size_t, size_t);
 494 #endif
 495
 496 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 497 extern void *realloc (void *, size_t);
 498 #endif
 499
 500 #ifdef __cplusplus
 501 }
 502 #endif
 503
 504 #ifdef HAVE_STDINT_H
 505 #include <stdint.h>
 506 #endif
 507
 508 #ifdef HAVE_INTTYPES_H
 509 #include <inttypes.h>
 510 #endif
 511
 512 #ifdef __cplusplus
 513 extern "C" {
 514 #endif
 515
 516 /* If the system doesn't provide strsignal, we get it defined in
 517    libiberty but no declaration is supplied.  */
 518 #if !defined (HAVE_STRSIGNAL) \
 519     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 520 # ifndef strsignal
 521 extern const char *strsignal (int);
 522 # endif
 523 #endif
 524
 525 #ifdef HAVE_GETRLIMIT
 526 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 527 #  ifndef getrlimit
 528 struct rlimit;
 529 extern int getrlimit (int, struct rlimit *);
 530 #  endif
 531 # endif
 532 #endif
 533
 534 #ifdef HAVE_SETRLIMIT
 535 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 536 #  ifndef setrlimit
 537 struct rlimit;
 538 extern int setrlimit (int, const struct rlimit *);
 539 #  endif
 540 # endif
 541 #endif
 542
 543 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 544 extern void abort (void);
 545 #endif
 546
 547 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 548 extern int snprintf (char *, size_t, const char *, ...);
 549 #endif
 550
 551 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 552 extern int vsnprintf (char *, size_t, const char *, va_list);
 553 #endif
 554
 555 #ifdef __cplusplus
 556 }
 557 #endif
 558
 559 /* 1 if we have C99 designated initializers.  */
 560 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 561 #define HAVE_DESIGNATED_INITIALIZERS \
 562   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 563    && !defined(__cplusplus))
 564 #endif
 565
 566 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 567 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 568   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 569    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 570 #endif
 571
 572 #if HAVE_SYS_STAT_H
 573 # include <sys/stat.h>
 574 #endif
 575
 576 /* Test if something is a normal file.  */
 577 #ifndef S_ISREG
 578 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 579 #endif
 580
 581 /* Test if something is a directory.  */
 582 #ifndef S_ISDIR
 583 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 584 #endif
 585
 586 /* Test if something is a character special file.  */
 587 #ifndef S_ISCHR
 588 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 589 #endif
 590
 591 /* Test if something is a block special file.  */
 592 #ifndef S_ISBLK
 593 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 594 #endif
 595
 596 /* Test if something is a socket.  */
 597 #ifndef S_ISSOCK
 598 # ifdef S_IFSOCK
 599 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 600 # else
 601 #   define S_ISSOCK(m) 0
 602 # endif
 603 #endif
 604
 605 /* Test if something is a FIFO.  */
 606 #ifndef S_ISFIFO
 607 # ifdef S_IFIFO
 608 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 609 # else
 610 #  define S_ISFIFO(m) 0
 611 # endif
 612 #endif
 613
 614 /* Define well known filenos if the system does not define them.  */
 615 #ifndef STDIN_FILENO
 616 # define STDIN_FILENO   0
 617 #endif
 618 #ifndef STDOUT_FILENO
 619 # define STDOUT_FILENO  1
 620 #endif
 621 #ifndef STDERR_FILENO
 622 # define STDERR_FILENO  2
 623 #endif
 624
 625 /* Some systems have mkdir that takes a single argument.  */
 626 #ifdef MKDIR_TAKES_ONE_ARG
 627 # define mkdir(a,b) mkdir (a)
 628 #endif
 629
 630 #ifndef HAVE_KILL
 631 # define kill(p,s) raise (s)
 632 #endif
 633
 634 /* Provide a way to print an address via printf.  */
 635 #ifndef HOST_PTR_PRINTF
 636 #define HOST_PTR_PRINTF "%p"
 637 #endif /* ! HOST_PTR_PRINTF */
 638
 639 /* By default, colon separates directories in a path.  */
 640 #ifndef PATH_SEPARATOR
 641 #define PATH_SEPARATOR ':'
 642 #endif
 643
 644 /* Filename handling macros.  */
 645 #include "filenames.h"
 646
 647 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 648 #ifndef DIR_SEPARATOR
 649 # define DIR_SEPARATOR '/'
 650 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 651 #  define DIR_SEPARATOR_2 '\\'
 652 # endif
 653 #endif
 654
 655 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 656 /* If plugin support is enabled, we could use libdl.  */
 657 #include <dlfcn.h>
 658 #endif
 659
 660 /* Do not introduce a gmp.h dependency on the build system.  */
 661 #ifndef GENERATOR_FILE
 662 #include <gmp.h>
 663 #endif
 664
 665 /* Get libiberty declarations.  */
 666 #include "libiberty.h"
 667
 668 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 669 #undef FLOAT /* Likewise.  */
 670 #undef ABS /* Likewise.  */
 671 #undef PC /* Likewise.  */
 672
 673 /* Provide a default for the HOST_BIT_BUCKET.
 674    This suffices for POSIX-like hosts.  */
 675
 676 #ifndef HOST_BIT_BUCKET
 677 #define HOST_BIT_BUCKET "/dev/null"
 678 #endif
 679
 680 #ifndef offsetof
 681 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 682 #endif
 683
 684 /* Various error reporting routines want to use __FUNCTION__.  */
 685 #if (GCC_VERSION < 2007)
 686 #ifndef __FUNCTION__
 687 #define __FUNCTION__ "?"
 688 #endif /* ! __FUNCTION__ */
 689 #endif
 690
 691 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 692    the most likely value of A is B.  This feature was added at some point
 693    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 694 #if (GCC_VERSION < 3000)
 695 #define __builtin_expect(a, b) (a)
 696 #endif
 697
 698 /* Redefine abort to report an internal error w/o coredump, and
 699    reporting the location of the error in the source file.  */
 700 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 701 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 702
 703 /* Use gcc_assert(EXPR) to test invariants.  */
 704 #if ENABLE_ASSERT_CHECKING
 705 #define gcc_assert(EXPR)                                                \
 706    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 707 #elif (GCC_VERSION >= 4005)
 708 #define gcc_assert(EXPR)                                                \
 709   ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
 710 #else
 711 /* Include EXPR, so that unused variable warnings do not occur.  */
 712 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 713 #endif
 714
 715 #ifdef ENABLE_CHECKING
 716 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 717 #else
 718 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 719 #endif
 720
 721 /* Use gcc_unreachable() to mark unreachable locations (like an
 722    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 723 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 724 #define gcc_unreachable() __builtin_unreachable ()
 725 #else
 726 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 727 #endif
 728
 729 #if GCC_VERSION >= 3001
 730 #define STATIC_CONSTANT_P(X) (__builtin_constant_p (X) && (X))
 731 #else
 732 #define STATIC_CONSTANT_P(X) (false && (X))
 733 #endif
 734
 735 /* Until we can use C++11's static_assert.  */
 736 #define STATIC_ASSERT(X) \
 737   typedef int assertion1[(X) ? 1 : -1] ATTRIBUTE_UNUSED
 738
 739 /* Provide a fake boolean type.  We make no attempt to use the
 740    C99 _Bool, as it may not be available in the bootstrap compiler,
 741    and even if it is, it is liable to be buggy.
 742    This must be after all inclusion of system headers, as some of
 743    them will mess us up.  */
 744
 745 #undef TRUE
 746 #undef FALSE
 747
 748 #ifdef __cplusplus
 749   /* Obsolete.  */
 750 # define TRUE true
 751 # define FALSE false
 752 #else /* !__cplusplus */
 753 # undef bool
 754 # undef true
 755 # undef false
 756
 757 # define bool unsigned char
 758 # define true 1
 759 # define false 0
 760
 761   /* Obsolete.  */
 762 # define TRUE true
 763 # define FALSE false
 764 #endif /* !__cplusplus */
 765
 766 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 767 #define BOOL_BITFIELD unsigned int
 768
 769 /* As the last action in this file, we poison the identifiers that
 770    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 771    preprocessor won't trip on poisoned identifiers that arrive from
 772    the expansion of macros.  E.g. #define strrchr rindex, won't error
 773    if rindex is poisoned after this directive is issued and later on
 774    strrchr is called.
 775
 776    Note: We define bypass macros for the few cases where we really
 777    want to use the libc memory allocation routines.  Otherwise we
 778    insist you use the "x" versions from libiberty.  */
 779
 780 #define really_call_malloc malloc
 781 #define really_call_calloc calloc
 782 #define really_call_realloc realloc
 783
 784 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 785 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 786    really_call_* cannot be used in a .l or .y file.  */
 787 #define malloc xmalloc
 788 #define realloc xrealloc
 789 #endif
 790
 791 #if (GCC_VERSION >= 3000)
 792
 793 /* Note autoconf checks for prototype declarations and includes
 794    system.h while doing so.  Only poison these tokens if actually
 795    compiling gcc, so that the autoconf declaration tests for malloc
 796    etc don't spuriously fail.  */
 797 #ifdef IN_GCC
 798 #undef calloc
 799 #undef strdup
 800  #pragma GCC poison calloc strdup
 801
 802 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 803 #undef malloc
 804 #undef realloc
 805  #pragma GCC poison malloc realloc
 806 #endif
 807
 808 /* The %m format should be used when GCC's main diagnostic functions
 809    supporting %m are available, and xstrerror from libiberty
 810    otherwise.  */
 811 #undef strerror
 812  #pragma GCC poison strerror
 813
 814 /* loc_t is defined on some systems and too inviting for some
 815    programmers to avoid.  */
 816 #undef loc_t
 817  #pragma GCC poison loc_t
 818
 819 /* Old target macros that have moved to the target hooks structure.  */
 820  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 821         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 822         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 823         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 824         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 825         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 826         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 827         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 828         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 829         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 830         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 831         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 832         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 833         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 834         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 835         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 836         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 837         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 838         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 839         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 840         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 841         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 842         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 843         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 844         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 845         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 846         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 847         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 848         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 849         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 850         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 851         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 852         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 853         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 854         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 855         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 856         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 857         OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
 858         ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK LIBGCC2_HAS_SF_MODE          \
 859         LIBGCC2_HAS_DF_MODE LIBGCC2_HAS_XF_MODE LIBGCC2_HAS_TF_MODE     \
 860         CLEAR_BY_PIECES_P MOVE_BY_PIECES_P SET_BY_PIECES_P              \
 861         STORE_BY_PIECES_P
 862
 863 /* Target macros only used for code built for the target, that have
 864    moved to libgcc-tm.h or have never been present elsewhere.  */
 865  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 866         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 867         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 868
 869 /* Other obsolete target macros, or macros that used to be in target
 870    headers and were not used, and may be obsolete or may never have
 871    been used.  */
 872  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 873         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 874         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 875         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 876         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 877         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 878         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 879         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 880         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 881         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 882         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 883         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 884         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 885         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 886         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 887         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 888         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 889         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 890         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 891         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 892         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 893         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 894         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 895         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 896         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 897         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 898         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 899         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 900         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 901         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 902         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 903         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 904         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 905         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 906         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 907         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 908         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 909         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 910         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 911         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 912         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 913         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 914         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 915         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 916         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 917         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 918         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 919         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 920         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 921         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 922         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 923         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 924         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 925         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 926         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 927         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 928         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 929         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 930         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 931         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 932         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT                    \
 933         LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO          \
 934         IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC    \
 935         DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT      \
 936         REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P                  \
 937         TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS       \
 938         IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP           \
 939         UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP                  \
 940         USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
 941         CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC                     \
 942         GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE              \
 943         ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS \
 944         REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P                        \
 945         CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT                      \
 946         REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT                 \
 947         EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT                       \
 948         EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P          \
 949         CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL                  \
 950         ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
 951         LIBGCC2_LONG_DOUBLE_TYPE_SIZE
 952
 953 /* Hooks that are no longer used.  */
 954  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 955         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 956         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 957         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 958         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 959         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
 960         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
 961         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
 962         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
 963         TARGET_IRA_COVER_CLASSES TARGET_HELP \
 964         TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
 965         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
 966         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
 967         TARGET_MD_ASM_CLOBBERS TARGET_RELAXED_ORDERING
 968
 969 /* Arrays that were deleted in favor of a functional interface.  */
 970  #pragma GCC poison built_in_decls implicit_built_in_decls
 971
 972 /* Hooks into libgcc2.  */
 973  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
 974    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 975
 976 /* Miscellaneous macros that are no longer used.  */
 977  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
 978
 979 /* Libiberty macros that are no longer used in GCC.  */
 980 #undef ANSI_PROTOTYPES
 981 #undef PTR_CONST
 982 #undef LONG_DOUBLE
 983 #undef VPARAMS
 984 #undef VA_OPEN
 985 #undef VA_FIXEDARG
 986 #undef VA_CLOSE
 987 #undef VA_START
 988  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 989   VA_FIXEDARG VA_CLOSE VA_START
 990 #endif /* IN_GCC */
 991
 992 /* Front ends should never have to include middle-end headers.  Enforce
 993    this by poisoning the header double-include protection defines.  */
 994 #ifdef IN_GCC_FRONTEND
 995 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
 996 #endif
 997
 998 /* Note: not all uses of the `index' token (e.g. variable names and
 999    structure members) have been eliminated.  */
1000 #undef bcopy
1001 #undef bzero
1002 #undef bcmp
1003 #undef rindex
1004  #pragma GCC poison bcopy bzero bcmp rindex
1005
1006 #endif /* GCC >= 3.0 */
1007
1008 /* This macro allows casting away const-ness to pass -Wcast-qual
1009    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
1010    only be used in certain specific cases.  One valid case is where
1011    the C standard definitions or prototypes force you to.  E.g. if you
1012    need to free a const object, or if you pass a const string to
1013    execv, et al.  Another valid use would be in an allocation function
1014    that creates const objects that need to be initialized.  In some
1015    cases we have non-const functions that return the argument
1016    (e.g. next_nonnote_insn).  Rather than create const shadow
1017    functions, we can cast away const-ness in calling these interfaces
1018    if we're careful to verify that the called function does indeed not
1019    modify its argument and the return value is only used in a const
1020    context.  (This can be somewhat dangerous as these assumptions can
1021    change after the fact).  Beyond these uses, most other cases of
1022    using this macro should be viewed with extreme caution.  */
1023
1024 #ifdef __cplusplus
1025 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
1026 #else
1027 #if defined(__GNUC__) && GCC_VERSION > 4000
1028 /* GCC 4.0.x has a bug where it may ICE on this expression,
1029    so does GCC 3.4.x (PR17436).  */
1030 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
1031 #elif defined(__GNUC__)
1032 static inline char *
1033 helper_const_non_const_cast (const char *p)
1034 {
1035   union {
1036     const char *const_c;
1037     char *c;
1038   } val;
1039   val.const_c = p;
1040   return val.c;
1041 }
1042
1043 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1044         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1045 #else
1046 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1047 #endif
1048 #endif
1049 #define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1050 #define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1051 #define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1052 #define CONST_CAST_RTX_INSN(X) CONST_CAST (struct rtx_insn *, (X))
1053 #define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1054 #define CONST_CAST_GIMPLE(X) CONST_CAST (struct gimple_statement_base *, (X))
1055
1056 /* Activate certain diagnostics as warnings (not errors via the
1057    -Werror flag).  */
1058 #if GCC_VERSION >= 4003
1059 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1060    an error/-Werror).  */
1061 #ifndef ENABLE_ASSERT_CHECKING
1062 #pragma GCC diagnostic warning "-Wuninitialized"
1063 #endif
1064 #endif
1065
1066 #ifdef ENABLE_VALGRIND_ANNOTATIONS
1067 # ifdef HAVE_VALGRIND_MEMCHECK_H
1068 #  include <valgrind/memcheck.h>
1069 # elif defined HAVE_MEMCHECK_H
1070 #  include <memcheck.h>
1071 # else
1072 #  include <valgrind.h>
1073 # endif
1074 /* Compatibility macros to let valgrind 3.1 work.  */
1075 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1076 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1077 # endif
1078 # ifndef VALGRIND_MAKE_MEM_DEFINED
1079 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1080 # endif
1081 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1082 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1083 # endif
1084 #else
1085 /* Avoid #ifdef:s when we can help it.  */
1086 #define VALGRIND_DISCARD(x)
1087 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1088 #define VALGRIND_FREELIKE_BLOCK(x,y)
1089 #endif
1090
1091 /* In LTO -fwhole-program build we still want to keep the debug functions available
1092    for debugger.  Mark them as used to prevent removal.  */
1093 #if (GCC_VERSION > 4000)
1094 #define DEBUG_FUNCTION __attribute__ ((__used__))
1095 #define DEBUG_VARIABLE __attribute__ ((__used__))
1096 #else
1097 #define DEBUG_FUNCTION
1098 #define DEBUG_VARIABLE
1099 #endif
1100
1101 /* General macro to extract bit Y of X.  */
1102 #define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
1103
1104 /* Get definitions of HOST_WIDE_INT.  */
1105 #include "hwint.h"
1106
1107 #endif /* ! GCC_SYSTEM_H */