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 #include <inttypes.h>
 495 #endif
 496
 497 #ifdef __cplusplus
 498 extern "C" {
 499 #endif
 500
 501 /* If the system doesn't provide strsignal, we get it defined in
 502    libiberty but no declaration is supplied.  */
 503 #if !defined (HAVE_STRSIGNAL) \
 504     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 505 # ifndef strsignal
 506 extern const char *strsignal (int);
 507 # endif
 508 #endif
 509
 510 #ifdef HAVE_GETRLIMIT
 511 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 512 #  ifndef getrlimit
 513 struct rlimit;
 514 extern int getrlimit (int, struct rlimit *);
 515 #  endif
 516 # endif
 517 #endif
 518
 519 #ifdef HAVE_SETRLIMIT
 520 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 521 #  ifndef setrlimit
 522 struct rlimit;
 523 extern int setrlimit (int, const struct rlimit *);
 524 #  endif
 525 # endif
 526 #endif
 527
 528 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 529 extern void abort (void);
 530 #endif
 531
 532 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 533 extern int snprintf (char *, size_t, const char *, ...);
 534 #endif
 535
 536 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 537 extern int vsnprintf (char *, size_t, const char *, va_list);
 538 #endif
 539
 540 #ifdef __cplusplus
 541 }
 542 #endif
 543
 544 /* 1 if we have C99 designated initializers.  */
 545 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 546 #define HAVE_DESIGNATED_INITIALIZERS \
 547   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 548    && !defined(__cplusplus))
 549 #endif
 550
 551 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 552 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 553   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 554    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 555 #endif
 556
 557 #if HAVE_SYS_STAT_H
 558 # include <sys/stat.h>
 559 #endif
 560
 561 /* Test if something is a normal file.  */
 562 #ifndef S_ISREG
 563 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 564 #endif
 565
 566 /* Test if something is a directory.  */
 567 #ifndef S_ISDIR
 568 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 569 #endif
 570
 571 /* Test if something is a character special file.  */
 572 #ifndef S_ISCHR
 573 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 574 #endif
 575
 576 /* Test if something is a block special file.  */
 577 #ifndef S_ISBLK
 578 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 579 #endif
 580
 581 /* Test if something is a socket.  */
 582 #ifndef S_ISSOCK
 583 # ifdef S_IFSOCK
 584 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 585 # else
 586 #   define S_ISSOCK(m) 0
 587 # endif
 588 #endif
 589
 590 /* Test if something is a FIFO.  */
 591 #ifndef S_ISFIFO
 592 # ifdef S_IFIFO
 593 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 594 # else
 595 #  define S_ISFIFO(m) 0
 596 # endif
 597 #endif
 598
 599 /* Define well known filenos if the system does not define them.  */
 600 #ifndef STDIN_FILENO
 601 # define STDIN_FILENO   0
 602 #endif
 603 #ifndef STDOUT_FILENO
 604 # define STDOUT_FILENO  1
 605 #endif
 606 #ifndef STDERR_FILENO
 607 # define STDERR_FILENO  2
 608 #endif
 609
 610 /* Some systems have mkdir that takes a single argument.  */
 611 #ifdef MKDIR_TAKES_ONE_ARG
 612 # define mkdir(a,b) mkdir (a)
 613 #endif
 614
 615 #ifndef HAVE_KILL
 616 # define kill(p,s) raise (s)
 617 #endif
 618
 619 /* Provide a way to print an address via printf.  */
 620 #ifndef HOST_PTR_PRINTF
 621 #define HOST_PTR_PRINTF "%p"
 622 #endif /* ! HOST_PTR_PRINTF */
 623
 624 /* By default, colon separates directories in a path.  */
 625 #ifndef PATH_SEPARATOR
 626 #define PATH_SEPARATOR ':'
 627 #endif
 628
 629 /* Filename handling macros.  */
 630 #include "filenames.h"
 631
 632 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 633 #ifndef DIR_SEPARATOR
 634 # define DIR_SEPARATOR '/'
 635 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 636 #  define DIR_SEPARATOR_2 '\\'
 637 # endif
 638 #endif
 639
 640 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 641 /* If plugin support is enabled, we could use libdl.  */
 642 #include <dlfcn.h>
 643 #endif
 644
 645 /* Do not introduce a gmp.h dependency on the build system.  */
 646 #ifndef GENERATOR_FILE
 647 #include <gmp.h>
 648 #endif
 649
 650 /* Get libiberty declarations.  */
 651 #include "libiberty.h"
 652
 653 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 654 #undef FLOAT /* Likewise.  */
 655 #undef ABS /* Likewise.  */
 656 #undef PC /* Likewise.  */
 657
 658 /* Provide a default for the HOST_BIT_BUCKET.
 659    This suffices for POSIX-like hosts.  */
 660
 661 #ifndef HOST_BIT_BUCKET
 662 #define HOST_BIT_BUCKET "/dev/null"
 663 #endif
 664
 665 #ifndef offsetof
 666 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 667 #endif
 668
 669 /* Various error reporting routines want to use __FUNCTION__.  */
 670 #if (GCC_VERSION < 2007)
 671 #ifndef __FUNCTION__
 672 #define __FUNCTION__ "?"
 673 #endif /* ! __FUNCTION__ */
 674 #endif
 675
 676 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 677    the most likely value of A is B.  This feature was added at some point
 678    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 679 #if (GCC_VERSION < 3000)
 680 #define __builtin_expect(a, b) (a)
 681 #endif
 682
 683 /* Redefine abort to report an internal error w/o coredump, and
 684    reporting the location of the error in the source file.  */
 685 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 686 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 687
 688 /* Use gcc_assert(EXPR) to test invariants.  */
 689 #if ENABLE_ASSERT_CHECKING
 690 #define gcc_assert(EXPR)                                                \
 691    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 692 #elif (GCC_VERSION >= 4005)
 693 #define gcc_assert(EXPR)                                                \
 694   ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
 695 #else
 696 /* Include EXPR, so that unused variable warnings do not occur.  */
 697 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 698 #endif
 699
 700 #ifdef ENABLE_CHECKING
 701 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 702 #else
 703 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 704 #endif
 705
 706 /* Use gcc_unreachable() to mark unreachable locations (like an
 707    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 708 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 709 #define gcc_unreachable() __builtin_unreachable ()
 710 #else
 711 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 712 #endif
 713
 714 /* Provide a fake boolean type.  We make no attempt to use the
 715    C99 _Bool, as it may not be available in the bootstrap compiler,
 716    and even if it is, it is liable to be buggy.
 717    This must be after all inclusion of system headers, as some of
 718    them will mess us up.  */
 719
 720 #undef TRUE
 721 #undef FALSE
 722
 723 #ifdef __cplusplus
 724   /* Obsolete.  */
 725 # define TRUE true
 726 # define FALSE false
 727 #else /* !__cplusplus */
 728 # undef bool
 729 # undef true
 730 # undef false
 731
 732 # define bool unsigned char
 733 # define true 1
 734 # define false 0
 735
 736   /* Obsolete.  */
 737 # define TRUE true
 738 # define FALSE false
 739 #endif /* !__cplusplus */
 740
 741 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 742 #define BOOL_BITFIELD unsigned int
 743
 744 /* As the last action in this file, we poison the identifiers that
 745    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 746    preprocessor won't trip on poisoned identifiers that arrive from
 747    the expansion of macros.  E.g. #define strrchr rindex, won't error
 748    if rindex is poisoned after this directive is issued and later on
 749    strrchr is called.
 750
 751    Note: We define bypass macros for the few cases where we really
 752    want to use the libc memory allocation routines.  Otherwise we
 753    insist you use the "x" versions from libiberty.  */
 754
 755 #define really_call_malloc malloc
 756 #define really_call_calloc calloc
 757 #define really_call_realloc realloc
 758
 759 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 760 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 761    really_call_* cannot be used in a .l or .y file.  */
 762 #define malloc xmalloc
 763 #define realloc xrealloc
 764 #endif
 765
 766 #if (GCC_VERSION >= 3000)
 767
 768 /* Note autoconf checks for prototype declarations and includes
 769    system.h while doing so.  Only poison these tokens if actually
 770    compiling gcc, so that the autoconf declaration tests for malloc
 771    etc don't spuriously fail.  */
 772 #ifdef IN_GCC
 773 #undef calloc
 774 #undef strdup
 775  #pragma GCC poison calloc strdup
 776
 777 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 778 #undef malloc
 779 #undef realloc
 780  #pragma GCC poison malloc realloc
 781 #endif
 782
 783 /* The %m format should be used when GCC's main diagnostic functions
 784    supporting %m are available, and xstrerror from libiberty
 785    otherwise.  */
 786 #undef strerror
 787  #pragma GCC poison strerror
 788
 789 /* loc_t is defined on some systems and too inviting for some
 790    programmers to avoid.  */
 791 #undef loc_t
 792  #pragma GCC poison loc_t
 793
 794 /* Old target macros that have moved to the target hooks structure.  */
 795  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 796         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 797         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 798         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 799         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 800         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 801         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 802         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 803         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 804         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 805         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 806         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 807         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 808         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 809         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 810         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 811         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 812         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 813         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 814         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 815         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 816         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 817         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 818         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 819         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 820         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 821         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 822         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 823         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 824         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 825         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 826         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 827         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 828         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 829         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 830         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 831         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 832         OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
 833         ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK
 834
 835 /* Target macros only used for code built for the target, that have
 836    moved to libgcc-tm.h or have never been present elsewhere.  */
 837  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 838         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 839         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 840
 841 /* Other obsolete target macros, or macros that used to be in target
 842    headers and were not used, and may be obsolete or may never have
 843    been used.  */
 844  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 845         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 846         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 847         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 848         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 849         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 850         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 851         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 852         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 853         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 854         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 855         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 856         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 857         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 858         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 859         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 860         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 861         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 862         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 863         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 864         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 865         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 866         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 867         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 868         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 869         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 870         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 871         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 872         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 873         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 874         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 875         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 876         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 877         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 878         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 879         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 880         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 881         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 882         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 883         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 884         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 885         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 886         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 887         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 888         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 889         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 890         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 891         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 892         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 893         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 894         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 895         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 896         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 897         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 898         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 899         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 900         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 901         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 902         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 903         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 904         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT                    \
 905         LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO          \
 906         IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC    \
 907         DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT      \
 908         REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P                  \
 909         TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS       \
 910         IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP           \
 911         UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP                  \
 912         USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
 913         CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC                     \
 914         GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE              \
 915         ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS
 916
 917 /* Hooks that are no longer used.  */
 918  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 919         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 920         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 921         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 922         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 923         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
 924         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
 925         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
 926         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
 927         TARGET_IRA_COVER_CLASSES TARGET_HELP \
 928         TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
 929         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
 930         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
 931
 932 /* Arrays that were deleted in favor of a functional interface.  */
 933  #pragma GCC poison built_in_decls implicit_built_in_decls
 934
 935 /* Hooks into libgcc2.  */
 936  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
 937    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 938
 939 /* Miscellaneous macros that are no longer used.  */
 940  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
 941
 942 /* Libiberty macros that are no longer used in GCC.  */
 943 #undef ANSI_PROTOTYPES
 944 #undef PTR_CONST
 945 #undef LONG_DOUBLE
 946 #undef VPARAMS
 947 #undef VA_OPEN
 948 #undef VA_FIXEDARG
 949 #undef VA_CLOSE
 950 #undef VA_START
 951  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 952   VA_FIXEDARG VA_CLOSE VA_START
 953 #endif /* IN_GCC */
 954
 955 /* Front ends should never have to include middle-end headers.  Enforce
 956    this by poisoning the header double-include protection defines.  */
 957 #ifdef IN_GCC_FRONTEND
 958 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
 959 #endif
 960
 961 /* Note: not all uses of the `index' token (e.g. variable names and
 962    structure members) have been eliminated.  */
 963 #undef bcopy
 964 #undef bzero
 965 #undef bcmp
 966 #undef rindex
 967  #pragma GCC poison bcopy bzero bcmp rindex
 968
 969 #endif /* GCC >= 3.0 */
 970
 971 /* This macro allows casting away const-ness to pass -Wcast-qual
 972    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
 973    only be used in certain specific cases.  One valid case is where
 974    the C standard definitions or prototypes force you to.  E.g. if you
 975    need to free a const object, or if you pass a const string to
 976    execv, et al.  Another valid use would be in an allocation function
 977    that creates const objects that need to be initialized.  In some
 978    cases we have non-const functions that return the argument
 979    (e.g. next_nonnote_insn).  Rather than create const shadow
 980    functions, we can cast away const-ness in calling these interfaces
 981    if we're careful to verify that the called function does indeed not
 982    modify its argument and the return value is only used in a const
 983    context.  (This can be somewhat dangerous as these assumptions can
 984    change after the fact).  Beyond these uses, most other cases of
 985    using this macro should be viewed with extreme caution.  */
 986
 987 #ifdef __cplusplus
 988 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
 989 #else
 990 #if defined(__GNUC__) && GCC_VERSION > 4000
 991 /* GCC 4.0.x has a bug where it may ICE on this expression,
 992    so does GCC 3.4.x (PR17436).  */
 993 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
 994 #elif defined(__GNUC__)
 995 static inline char *
 996 helper_const_non_const_cast (const char *p)
 997 {
 998   union {
 999     const char *const_c;
1000     char *c;
1001   } val;
1002   val.const_c = p;
1003   return val.c;
1004 }
1005
1006 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1007         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1008 #else
1009 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1010 #endif
1011 #endif
1012 #define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1013 #define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1014 #define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1015 #define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1016 #define CONST_CAST_GIMPLE(X) CONST_CAST (struct gimple_statement_base *, (X))
1017
1018 /* Activate certain diagnostics as warnings (not errors via the
1019    -Werror flag).  */
1020 #if GCC_VERSION >= 4003
1021 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1022    an error/-Werror).  */
1023 #ifndef ENABLE_ASSERT_CHECKING
1024 #pragma GCC diagnostic warning "-Wuninitialized"
1025 #endif
1026 #endif
1027
1028 #ifdef ENABLE_VALGRIND_CHECKING
1029 # ifdef HAVE_VALGRIND_MEMCHECK_H
1030 #  include <valgrind/memcheck.h>
1031 # elif defined HAVE_MEMCHECK_H
1032 #  include <memcheck.h>
1033 # else
1034 #  include <valgrind.h>
1035 # endif
1036 /* Compatibility macros to let valgrind 3.1 work.  */
1037 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1038 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1039 # endif
1040 # ifndef VALGRIND_MAKE_MEM_DEFINED
1041 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1042 # endif
1043 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1044 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1045 # endif
1046 #else
1047 /* Avoid #ifdef:s when we can help it.  */
1048 #define VALGRIND_DISCARD(x)
1049 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1050 #define VALGRIND_FREELIKE_BLOCK(x,y)
1051 #endif
1052
1053 /* In LTO -fwhole-program build we still want to keep the debug functions available
1054    for debugger.  Mark them as used to prevent removal.  */
1055 #if (GCC_VERSION > 4000)
1056 #define DEBUG_FUNCTION __attribute__ ((__used__))
1057 #define DEBUG_VARIABLE __attribute__ ((__used__))
1058 #else
1059 #define DEBUG_FUNCTION
1060 #define DEBUG_VARIABLE
1061 #endif
1062
1063 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT.  */
1064 #include "hwint.h"
1065
1066 #endif /* ! GCC_SYSTEM_H */