gcc/system.h

   1 /* Get common system includes and various definitions and declarations based
   2    on autoconf macros.
   3    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008,
   4    2009, 2010, 2011
   5    Free Software Foundation, Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 3, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22
  23
  24 #ifndef GCC_SYSTEM_H
  25 #define GCC_SYSTEM_H
  26
  27 /* We must include stdarg.h before stdio.h.  */
  28 #include <stdarg.h>
  29
  30 #ifndef va_copy
  31 # ifdef __va_copy
  32 #   define va_copy(d,s)  __va_copy((d),(s))
  33 # else
  34 #   define va_copy(d,s)  ((d) = (s))
  35 # endif
  36 #endif
  37
  38 #ifdef HAVE_STDDEF_H
  39 # include <stddef.h>
  40 #endif
  41
  42 #include <stdio.h>
  43
  44 /* Define a generic NULL if one hasn't already been defined.  */
  45 #ifndef NULL
  46 #define NULL 0
  47 #endif
  48
  49 /* Use the unlocked open routines from libiberty.  */
  50 #ifdef fopen /* fopen is a #define on VMS.  */
  51 #undef fopen
  52 #endif
  53 #define fopen(PATH,MODE) fopen_unlocked(PATH,MODE)
  54 #define fdopen(FILDES,MODE) fdopen_unlocked(FILDES,MODE)
  55 #define freopen(PATH,MODE,STREAM) freopen_unlocked(PATH,MODE,STREAM)
  56
  57 /* The compiler is not a multi-threaded application and therefore we
  58    do not have to use the locking functions.  In fact, using the locking
  59    functions can cause the compiler to be significantly slower under
  60    I/O bound conditions (such as -g -O0 on very large source files).
  61
  62    HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
  63    code is multi-thread safe by default.  If it is set to 0, then do
  64    not worry about using the _unlocked functions.
  65
  66    fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
  67    extensions and need to be prototyped by hand (since we do not
  68    define _GNU_SOURCE).  */
  69
  70 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
  71
  72 # ifdef HAVE_PUTC_UNLOCKED
  73 #  undef putc
  74 #  define putc(C, Stream) putc_unlocked (C, Stream)
  75 # endif
  76 # ifdef HAVE_PUTCHAR_UNLOCKED
  77 #  undef putchar
  78 #  define putchar(C) putchar_unlocked (C)
  79 # endif
  80 # ifdef HAVE_GETC_UNLOCKED
  81 #  undef getc
  82 #  define getc(Stream) getc_unlocked (Stream)
  83 # endif
  84 # ifdef HAVE_GETCHAR_UNLOCKED
  85 #  undef getchar
  86 #  define getchar() getchar_unlocked ()
  87 # endif
  88 # ifdef HAVE_FPUTC_UNLOCKED
  89 #  undef fputc
  90 #  define fputc(C, Stream) fputc_unlocked (C, Stream)
  91 # endif
  92
  93 #ifdef __cplusplus
  94 extern "C" {
  95 #endif
  96
  97 # ifdef HAVE_CLEARERR_UNLOCKED
  98 #  undef clearerr
  99 #  define clearerr(Stream) clearerr_unlocked (Stream)
 100 #  if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED
 101 extern void clearerr_unlocked (FILE *);
 102 #  endif
 103 # endif
 104 # ifdef HAVE_FEOF_UNLOCKED
 105 #  undef feof
 106 #  define feof(Stream) feof_unlocked (Stream)
 107 #  if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED
 108 extern int feof_unlocked (FILE *);
 109 #  endif
 110 # endif
 111 # ifdef HAVE_FILENO_UNLOCKED
 112 #  undef fileno
 113 #  define fileno(Stream) fileno_unlocked (Stream)
 114 #  if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED
 115 extern int fileno_unlocked (FILE *);
 116 #  endif
 117 # endif
 118 # ifdef HAVE_FFLUSH_UNLOCKED
 119 #  undef fflush
 120 #  define fflush(Stream) fflush_unlocked (Stream)
 121 #  if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED
 122 extern int fflush_unlocked (FILE *);
 123 #  endif
 124 # endif
 125 # ifdef HAVE_FGETC_UNLOCKED
 126 #  undef fgetc
 127 #  define fgetc(Stream) fgetc_unlocked (Stream)
 128 #  if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED
 129 extern int fgetc_unlocked (FILE *);
 130 #  endif
 131 # endif
 132 # ifdef HAVE_FGETS_UNLOCKED
 133 #  undef fgets
 134 #  define fgets(S, n, Stream) fgets_unlocked (S, n, Stream)
 135 #  if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED
 136 extern char *fgets_unlocked (char *, int, FILE *);
 137 #  endif
 138 # endif
 139 # ifdef HAVE_FPUTS_UNLOCKED
 140 #  undef fputs
 141 #  define fputs(String, Stream) fputs_unlocked (String, Stream)
 142 #  if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
 143 extern int fputs_unlocked (const char *, FILE *);
 144 #  endif
 145 # endif
 146 # ifdef HAVE_FERROR_UNLOCKED
 147 #  undef ferror
 148 #  define ferror(Stream) ferror_unlocked (Stream)
 149 #  if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED
 150 extern int ferror_unlocked (FILE *);
 151 #  endif
 152 # endif
 153 # ifdef HAVE_FREAD_UNLOCKED
 154 #  undef fread
 155 #  define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream)
 156 #  if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED
 157 extern size_t fread_unlocked (void *, size_t, size_t, FILE *);
 158 #  endif
 159 # endif
 160 # ifdef HAVE_FWRITE_UNLOCKED
 161 #  undef fwrite
 162 #  define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
 163 #  if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
 164 extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *);
 165 #  endif
 166 # endif
 167 # ifdef HAVE_FPRINTF_UNLOCKED
 168 #  undef fprintf
 169 /* We can't use a function-like macro here because we don't know if
 170    we have varargs macros.  */
 171 #  define fprintf fprintf_unlocked
 172 #  if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
 173 extern int fprintf_unlocked (FILE *, const char *, ...);
 174 #  endif
 175 # endif
 176
 177 #ifdef __cplusplus
 178 }
 179 #endif
 180
 181 #endif
 182
 183 /* ??? Glibc's fwrite/fread_unlocked macros cause
 184    "warning: signed and unsigned type in conditional expression".  */
 185 #undef fread_unlocked
 186 #undef fwrite_unlocked
 187
 188 /* There are an extraordinary number of issues with <ctype.h>.
 189    The last straw is that it varies with the locale.  Use libiberty's
 190    replacement instead.  */
 191 #include "safe-ctype.h"
 192
 193 #include <sys/types.h>
 194
 195 #include <errno.h>
 196
 197 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 198 extern int errno;
 199 #endif
 200
 201 #ifdef __cplusplus
 202 # include <cstring>
 203 #endif
 204
 205 /* Some of glibc's string inlines cause warnings.  Plus we'd rather
 206    rely on (and therefore test) GCC's string builtins.  */
 207 #define __NO_STRING_INLINES
 208
 209 #ifdef STRING_WITH_STRINGS
 210 # include <string.h>
 211 # include <strings.h>
 212 #else
 213 # ifdef HAVE_STRING_H
 214 #  include <string.h>
 215 # else
 216 #  ifdef HAVE_STRINGS_H
 217 #   include <strings.h>
 218 #  endif
 219 # endif
 220 #endif
 221
 222 #ifdef HAVE_STDLIB_H
 223 # include <stdlib.h>
 224 #endif
 225
 226 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
 227    FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
 228    or 0 and 1 if those macros are not defined.  */
 229 #ifndef SUCCESS_EXIT_CODE
 230 # ifdef EXIT_SUCCESS
 231 #  define SUCCESS_EXIT_CODE EXIT_SUCCESS
 232 # else
 233 #  define SUCCESS_EXIT_CODE 0
 234 # endif
 235 #endif
 236
 237 #ifndef FATAL_EXIT_CODE
 238 # ifdef EXIT_FAILURE
 239 #  define FATAL_EXIT_CODE EXIT_FAILURE
 240 # else
 241 #  define FATAL_EXIT_CODE 1
 242 # endif
 243 #endif
 244
 245 #define ICE_EXIT_CODE 4
 246
 247 #ifdef HAVE_UNISTD_H
 248 # include <unistd.h>
 249 #endif
 250
 251 #ifdef HAVE_SYS_PARAM_H
 252 # include <sys/param.h>
 253 /* We use this identifier later and it appears in some vendor param.h's.  */
 254 # undef PREFETCH
 255 #endif
 256
 257 #if HAVE_LIMITS_H
 258 # include <limits.h>
 259 #endif
 260
 261 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT.  */
 262 #include "hwint.h"
 263
 264 /* A macro to determine whether a VALUE lies inclusively within a
 265    certain range without evaluating the VALUE more than once.  This
 266    macro won't warn if the VALUE is unsigned and the LOWER bound is
 267    zero, as it would e.g. with "VALUE >= 0 && ...".  Note the LOWER
 268    bound *is* evaluated twice, and LOWER must not be greater than
 269    UPPER.  However the bounds themselves can be either positive or
 270    negative.  */
 271 #define IN_RANGE(VALUE, LOWER, UPPER) \
 272   ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
 273    <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
 274
 275 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 276    macros defined with these cannot be used in #if.  */
 277
 278 /* The extra casts work around common compiler bugs.  */
 279 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 280 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 281    It is necessary at least when t == time_t.  */
 282 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 283                              ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
 284 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 285
 286 /* Use that infrastructure to provide a few constants.  */
 287 #ifndef UCHAR_MAX
 288 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 289 #endif
 290
 291 #ifdef TIME_WITH_SYS_TIME
 292 # include <sys/time.h>
 293 # include <time.h>
 294 #else
 295 # if HAVE_SYS_TIME_H
 296 #  include <sys/time.h>
 297 # else
 298 #  ifdef HAVE_TIME_H
 299 #   include <time.h>
 300 #  endif
 301 # endif
 302 #endif
 303
 304 #ifdef HAVE_FCNTL_H
 305 # include <fcntl.h>
 306 #else
 307 # ifdef HAVE_SYS_FILE_H
 308 #  include <sys/file.h>
 309 # endif
 310 #endif
 311
 312 #ifndef SEEK_SET
 313 # define SEEK_SET 0
 314 # define SEEK_CUR 1
 315 # define SEEK_END 2
 316 #endif
 317 #ifndef F_OK
 318 # define F_OK 0
 319 # define X_OK 1
 320 # define W_OK 2
 321 # define R_OK 4
 322 #endif
 323 #ifndef O_RDONLY
 324 # define O_RDONLY 0
 325 #endif
 326 #ifndef O_WRONLY
 327 # define O_WRONLY 1
 328 #endif
 329 #ifndef O_BINARY
 330 # define O_BINARY 0
 331 #endif
 332
 333 /* Some systems define these in, e.g., param.h.  We undefine these names
 334    here to avoid the warnings.  We prefer to use our definitions since we
 335    know they are correct.  */
 336
 337 #undef MIN
 338 #undef MAX
 339 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 340 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 341
 342 /* Returns the least number N such that N * Y >= X.  */
 343 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 344
 345 #ifdef HAVE_SYS_WAIT_H
 346 #include <sys/wait.h>
 347 #endif
 348
 349 #ifndef WIFSIGNALED
 350 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 351 #endif
 352 #ifndef WTERMSIG
 353 #define WTERMSIG(S) ((S) & 0x7f)
 354 #endif
 355 #ifndef WIFEXITED
 356 #define WIFEXITED(S) (((S) & 0xff) == 0)
 357 #endif
 358 #ifndef WEXITSTATUS
 359 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 360 #endif
 361 #ifndef WSTOPSIG
 362 #define WSTOPSIG WEXITSTATUS
 363 #endif
 364 #ifndef WCOREDUMP
 365 #define WCOREDUMP(S) ((S) & WCOREFLG)
 366 #endif
 367 #ifndef WCOREFLG
 368 #define WCOREFLG 0200
 369 #endif
 370
 371 #include <signal.h>
 372 #if !defined (SIGCHLD) && defined (SIGCLD)
 373 # define SIGCHLD SIGCLD
 374 #endif
 375
 376 #ifdef HAVE_SYS_MMAN_H
 377 # include <sys/mman.h>
 378 #endif
 379
 380 #ifndef MAP_FAILED
 381 # define MAP_FAILED ((void *)-1)
 382 #endif
 383
 384 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
 385 # define MAP_ANONYMOUS MAP_ANON
 386 #endif
 387
 388 #ifdef HAVE_SYS_RESOURCE_H
 389 # include <sys/resource.h>
 390 #endif
 391
 392 #ifdef HAVE_SYS_TIMES_H
 393 # include <sys/times.h>
 394 #endif
 395
 396 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 397    are defined to 0 then we must provide the relevant declaration
 398    here.  These checks will be in the undefined state while configure
 399    is running so be careful to test "defined (HAVE_DECL_*)".  */
 400
 401 #ifdef __cplusplus
 402 extern "C" {
 403 #endif
 404
 405 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 406 extern double atof (const char *);
 407 #endif
 408
 409 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 410 extern long atol (const char *);
 411 #endif
 412
 413 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 414 extern void free (void *);
 415 #endif
 416
 417 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 418 extern char *getcwd (char *, size_t);
 419 #endif
 420
 421 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 422 extern char *getenv (const char *);
 423 #endif
 424
 425 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 426 extern int getopt (int, char * const *, const char *);
 427 #endif
 428
 429 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
 430 extern int getpagesize (void);
 431 #endif
 432
 433 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 434 extern char *getwd (char *);
 435 #endif
 436
 437 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 438 extern void *sbrk (int);
 439 #endif
 440
 441 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 442 extern char *strstr (const char *, const char *);
 443 #endif
 444
 445 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
 446 extern char *stpcpy (char *, const char *);
 447 #endif
 448
 449 #ifdef __cplusplus
 450 }
 451 #endif
 452
 453 #ifdef HAVE_MALLOC_H
 454 #include <malloc.h>
 455 #endif
 456
 457 #ifdef __cplusplus
 458 extern "C" {
 459 #endif
 460
 461 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 462 extern void *malloc (size_t);
 463 #endif
 464
 465 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 466 extern void *calloc (size_t, size_t);
 467 #endif
 468
 469 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 470 extern void *realloc (void *, size_t);
 471 #endif
 472
 473 #ifdef __cplusplus
 474 }
 475 #endif
 476
 477 #ifdef HAVE_STDINT_H
 478 #include <stdint.h>
 479 #endif
 480
 481 #ifdef HAVE_INTTYPES_H
 482 #include <inttypes.h>
 483 #endif
 484
 485 #ifdef __cplusplus
 486 extern "C" {
 487 #endif
 488
 489 /* If the system doesn't provide strsignal, we get it defined in
 490    libiberty but no declaration is supplied.  */
 491 #if !defined (HAVE_STRSIGNAL) \
 492     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 493 # ifndef strsignal
 494 extern const char *strsignal (int);
 495 # endif
 496 #endif
 497
 498 #ifdef HAVE_GETRLIMIT
 499 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 500 #  ifndef getrlimit
 501 struct rlimit;
 502 extern int getrlimit (int, struct rlimit *);
 503 #  endif
 504 # endif
 505 #endif
 506
 507 #ifdef HAVE_SETRLIMIT
 508 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 509 #  ifndef setrlimit
 510 struct rlimit;
 511 extern int setrlimit (int, const struct rlimit *);
 512 #  endif
 513 # endif
 514 #endif
 515
 516 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 517 extern void abort (void);
 518 #endif
 519
 520 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 521 extern int snprintf (char *, size_t, const char *, ...);
 522 #endif
 523
 524 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 525 extern int vsnprintf(char *, size_t, const char *, va_list);
 526 #endif
 527
 528 #ifdef __cplusplus
 529 }
 530 #endif
 531
 532 /* 1 if we have C99 designated initializers.  */
 533 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 534 #define HAVE_DESIGNATED_INITIALIZERS \
 535   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 536    && !defined(__cplusplus))
 537 #endif
 538
 539 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 540 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 541   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 542    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 543 #endif
 544
 545 #if HAVE_SYS_STAT_H
 546 # include <sys/stat.h>
 547 #endif
 548
 549 /* Test if something is a normal file.  */
 550 #ifndef S_ISREG
 551 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 552 #endif
 553
 554 /* Test if something is a directory.  */
 555 #ifndef S_ISDIR
 556 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 557 #endif
 558
 559 /* Test if something is a character special file.  */
 560 #ifndef S_ISCHR
 561 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 562 #endif
 563
 564 /* Test if something is a block special file.  */
 565 #ifndef S_ISBLK
 566 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 567 #endif
 568
 569 /* Test if something is a socket.  */
 570 #ifndef S_ISSOCK
 571 # ifdef S_IFSOCK
 572 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 573 # else
 574 #   define S_ISSOCK(m) 0
 575 # endif
 576 #endif
 577
 578 /* Test if something is a FIFO.  */
 579 #ifndef S_ISFIFO
 580 # ifdef S_IFIFO
 581 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 582 # else
 583 #  define S_ISFIFO(m) 0
 584 # endif
 585 #endif
 586
 587 /* Define well known filenos if the system does not define them.  */
 588 #ifndef STDIN_FILENO
 589 # define STDIN_FILENO   0
 590 #endif
 591 #ifndef STDOUT_FILENO
 592 # define STDOUT_FILENO  1
 593 #endif
 594 #ifndef STDERR_FILENO
 595 # define STDERR_FILENO  2
 596 #endif
 597
 598 /* Some systems have mkdir that takes a single argument.  */
 599 #ifdef MKDIR_TAKES_ONE_ARG
 600 # define mkdir(a,b) mkdir(a)
 601 #endif
 602
 603 #ifndef HAVE_KILL
 604 # define kill(p,s) raise(s)
 605 #endif
 606
 607 /* Provide a way to print an address via printf.  */
 608 #ifndef HOST_PTR_PRINTF
 609 #define HOST_PTR_PRINTF "%p"
 610 #endif /* ! HOST_PTR_PRINTF */
 611
 612 /* By default, colon separates directories in a path.  */
 613 #ifndef PATH_SEPARATOR
 614 #define PATH_SEPARATOR ':'
 615 #endif
 616
 617 /* Filename handling macros.  */
 618 #include "filenames.h"
 619
 620 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 621 #ifndef DIR_SEPARATOR
 622 # define DIR_SEPARATOR '/'
 623 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 624 #  define DIR_SEPARATOR_2 '\\'
 625 # endif
 626 #endif
 627
 628 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 629 /* If plugin support is enabled, we could use libdl.  */
 630 #include <dlfcn.h>
 631 #endif
 632
 633 /* Get libiberty declarations.  */
 634 #include "libiberty.h"
 635
 636 /* Provide a default for the HOST_BIT_BUCKET.
 637    This suffices for POSIX-like hosts.  */
 638
 639 #ifndef HOST_BIT_BUCKET
 640 #define HOST_BIT_BUCKET "/dev/null"
 641 #endif
 642
 643 #ifndef offsetof
 644 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 645 #endif
 646
 647 /* Various error reporting routines want to use __FUNCTION__.  */
 648 #if (GCC_VERSION < 2007)
 649 #ifndef __FUNCTION__
 650 #define __FUNCTION__ "?"
 651 #endif /* ! __FUNCTION__ */
 652 #endif
 653
 654 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 655    the most likely value of A is B.  This feature was added at some point
 656    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 657 #if (GCC_VERSION < 3000)
 658 #define __builtin_expect(a, b) (a)
 659 #endif
 660
 661 /* Redefine abort to report an internal error w/o coredump, and
 662    reporting the location of the error in the source file.  */
 663 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 664 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 665
 666 /* Use gcc_assert(EXPR) to test invariants.  */
 667 #if ENABLE_ASSERT_CHECKING
 668 #define gcc_assert(EXPR)                                                \
 669    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 670 #elif (GCC_VERSION >= 4005)
 671 #define gcc_assert(EXPR)                                                \
 672   ((void)(__builtin_expect(!(EXPR), 0) ? __builtin_unreachable(), 0 : 0))
 673 #else
 674 /* Include EXPR, so that unused variable warnings do not occur.  */
 675 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 676 #endif
 677
 678 #ifdef ENABLE_CHECKING
 679 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 680 #else
 681 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 682 #endif
 683
 684 /* Use gcc_unreachable() to mark unreachable locations (like an
 685    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 686 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 687 #define gcc_unreachable() __builtin_unreachable()
 688 #else
 689 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 690 #endif
 691
 692 /* Provide a fake boolean type.  We make no attempt to use the
 693    C99 _Bool, as it may not be available in the bootstrap compiler,
 694    and even if it is, it is liable to be buggy.
 695    This must be after all inclusion of system headers, as some of
 696    them will mess us up.  */
 697
 698 #undef TRUE
 699 #undef FALSE
 700
 701 #ifdef __cplusplus
 702   /* Obsolete.  */
 703 # define TRUE true
 704 # define FALSE false
 705 #else /* !__cplusplus */
 706 # undef bool
 707 # undef true
 708 # undef false
 709
 710 # define bool unsigned char
 711 # define true 1
 712 # define false 0
 713
 714   /* Obsolete.  */
 715 # define TRUE true
 716 # define FALSE false
 717 #endif /* !__cplusplus */
 718
 719 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 720 #define BOOL_BITFIELD unsigned int
 721
 722 /* As the last action in this file, we poison the identifiers that
 723    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 724    preprocessor won't trip on poisoned identifiers that arrive from
 725    the expansion of macros.  E.g. #define strrchr rindex, won't error
 726    if rindex is poisoned after this directive is issued and later on
 727    strrchr is called.
 728
 729    Note: We define bypass macros for the few cases where we really
 730    want to use the libc memory allocation routines.  Otherwise we
 731    insist you use the "x" versions from libiberty.  */
 732
 733 #define really_call_malloc malloc
 734 #define really_call_calloc calloc
 735 #define really_call_realloc realloc
 736
 737 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 738 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 739    really_call_* cannot be used in a .l or .y file.  */
 740 #define malloc xmalloc
 741 #define realloc xrealloc
 742 #endif
 743
 744 #if (GCC_VERSION >= 3000)
 745
 746 /* Note autoconf checks for prototype declarations and includes
 747    system.h while doing so.  Only poison these tokens if actually
 748    compiling gcc, so that the autoconf declaration tests for malloc
 749    etc don't spuriously fail.  */
 750 #ifdef IN_GCC
 751 #undef calloc
 752 #undef strdup
 753  #pragma GCC poison calloc strdup
 754
 755 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 756 #undef malloc
 757 #undef realloc
 758  #pragma GCC poison malloc realloc
 759 #endif
 760
 761 /* The %m format should be used when GCC's main diagnostic functions
 762    supporting %m are available, and xstrerror from libiberty
 763    otherwise.  */
 764 #undef strerror
 765  #pragma GCC poison strerror
 766
 767 /* Old target macros that have moved to the target hooks structure.  */
 768  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 769         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 770         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 771         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 772         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 773         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 774         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 775         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 776         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 777         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 778         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 779         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 780         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 781         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 782         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 783         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 784         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 785         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 786         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 787         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 788         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 789         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 790         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 791         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 792         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 793         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 794         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 795         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 796         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 797         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 798         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 799         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 800         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 801         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 802         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 803         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 804         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 805         OUTPUT_ADDR_CONST_EXTRA
 806
 807 /* Target macros only used for code built for the target, that have
 808    moved to libgcc-tm.h or have never been present elsewhere.  */
 809  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 810         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 811         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 812
 813 /* Other obsolete target macros, or macros that used to be in target
 814    headers and were not used, and may be obsolete or may never have
 815    been used.  */
 816  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 817         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 818         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 819         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 820         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 821         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 822         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 823         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 824         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 825         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 826         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 827         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 828         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 829         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 830         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 831         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 832         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 833         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 834         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 835         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 836         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 837         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 838         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 839         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 840         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 841         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 842         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 843         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 844         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 845         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 846         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 847         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 848         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 849         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 850         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 851         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 852         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 853         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 854         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 855         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 856         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 857         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 858         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 859         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 860         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 861         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 862         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 863         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 864         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 865         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 866         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 867         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 868         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 869         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 870         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 871         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 872         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 873         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 874         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 875         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 876         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT
 877
 878 /* Hooks that are no longer used.  */
 879  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 880         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 881         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 882         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 883         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 884         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
 885         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
 886         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
 887         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
 888         TARGET_IRA_COVER_CLASSES TARGET_HELP
 889
 890 /* Arrays that were deleted in favor of a functional interface.  */
 891  #pragma GCC poison built_in_decls implicit_built_in_decls
 892
 893 /* Hooks into libgcc2.  */
 894  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
 895    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 896
 897 /* Miscellaneous macros that are no longer used.  */
 898  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
 899
 900 /* Libiberty macros that are no longer used in GCC.  */
 901 #undef ANSI_PROTOTYPES
 902 #undef PTR_CONST
 903 #undef LONG_DOUBLE
 904 #undef VPARAMS
 905 #undef VA_OPEN
 906 #undef VA_FIXEDARG
 907 #undef VA_CLOSE
 908 #undef VA_START
 909  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 910   VA_FIXEDARG VA_CLOSE VA_START
 911 #endif /* IN_GCC */
 912
 913 /* Front ends should never have to include middle-end headers.  Enforce
 914    this by poisoning the header double-include protection defines.  */
 915 #ifdef IN_GCC_FRONTEND
 916 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
 917 #endif
 918
 919 /* Note: not all uses of the `index' token (e.g. variable names and
 920    structure members) have been eliminated.  */
 921 #undef bcopy
 922 #undef bzero
 923 #undef bcmp
 924 #undef rindex
 925  #pragma GCC poison bcopy bzero bcmp rindex
 926
 927 #endif /* GCC >= 3.0 */
 928
 929 /* This macro allows casting away const-ness to pass -Wcast-qual
 930    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
 931    only be used in certain specific cases.  One valid case is where
 932    the C standard definitions or prototypes force you to.  E.g. if you
 933    need to free a const object, or if you pass a const string to
 934    execv, et al.  Another valid use would be in an allocation function
 935    that creates const objects that need to be initialized.  In some
 936    cases we have non-const functions that return the argument
 937    (e.g. next_nonnote_insn).  Rather than create const shadow
 938    functions, we can cast away const-ness in calling these interfaces
 939    if we're careful to verify that the called function does indeed not
 940    modify its argument and the return value is only used in a const
 941    context.  (This can be somewhat dangerous as these assumptions can
 942    change after the fact).  Beyond these uses, most other cases of
 943    using this macro should be viewed with extreme caution.  */
 944
 945 #ifdef __cplusplus
 946 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
 947 #else
 948 #if defined(__GNUC__) && GCC_VERSION > 4000
 949 /* GCC 4.0.x has a bug where it may ICE on this expression,
 950    so does GCC 3.4.x (PR17436).  */
 951 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
 952 #elif defined(__GNUC__)
 953 static inline char *
 954 helper_const_non_const_cast (const char *p)
 955 {
 956   union {
 957     const char *const_c;
 958     char *c;
 959   } val;
 960   val.const_c = p;
 961   return val.c;
 962 }
 963
 964 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
 965         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
 966 #else
 967 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
 968 #endif
 969 #endif
 970 #define CONST_CAST(TYPE,X) CONST_CAST2(TYPE, const TYPE, (X))
 971 #define CONST_CAST_TREE(X) CONST_CAST(union tree_node *, (X))
 972 #define CONST_CAST_RTX(X) CONST_CAST(struct rtx_def *, (X))
 973 #define CONST_CAST_BB(X) CONST_CAST(struct basic_block_def *, (X))
 974 #define CONST_CAST_GIMPLE(X) CONST_CAST(union gimple_statement_d *, (X))
 975
 976 /* Activate certain diagnostics as warnings (not errors via the
 977    -Werror flag).  */
 978 #if GCC_VERSION >= 4003
 979 /* If asserts are disabled, activate -Wuninitialized as a warning (not
 980    an error/-Werror).  */
 981 #ifndef ENABLE_ASSERT_CHECKING
 982 #pragma GCC diagnostic warning "-Wuninitialized"
 983 #endif
 984 #endif
 985
 986 #ifdef ENABLE_VALGRIND_CHECKING
 987 # ifdef HAVE_VALGRIND_MEMCHECK_H
 988 #  include <valgrind/memcheck.h>
 989 # elif defined HAVE_MEMCHECK_H
 990 #  include <memcheck.h>
 991 # else
 992 #  include <valgrind.h>
 993 # endif
 994 /* Compatibility macros to let valgrind 3.1 work.  */
 995 # ifndef VALGRIND_MAKE_MEM_NOACCESS
 996 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
 997 # endif
 998 # ifndef VALGRIND_MAKE_MEM_DEFINED
 999 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1000 # endif
1001 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1002 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1003 # endif
1004 #else
1005 /* Avoid #ifdef:s when we can help it.  */
1006 #define VALGRIND_DISCARD(x)
1007 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1008 #define VALGRIND_FREELIKE_BLOCK(x,y)
1009 #endif
1010
1011 /* In LTO -fwhole-program build we still want to keep the debug functions available
1012    for debugger.  Mark them as used to prevent removal.  */
1013 #if (GCC_VERSION > 4000)
1014 #define DEBUG_FUNCTION __attribute__ ((__used__))
1015 #define DEBUG_VARIABLE __attribute__ ((__used__))
1016 #else
1017 #define DEBUG_FUNCTION
1018 #define DEBUG_VARIABLE
1019 #endif
1020
1021 #endif /* ! GCC_SYSTEM_H */