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