gcc/system.h

   1 /* Get common system includes and various definitions and declarations based
   2    on autoconf macros.
   3    Copyright (C) 1998-2013 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 /* Undef vec_free from AIX stdlib.h header which conflicts with vec.h.  */
 230 #undef vec_free
 231
 232 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
 233    FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
 234    or 0 and 1 if those macros are not defined.  */
 235 #ifndef SUCCESS_EXIT_CODE
 236 # ifdef EXIT_SUCCESS
 237 #  define SUCCESS_EXIT_CODE EXIT_SUCCESS
 238 # else
 239 #  define SUCCESS_EXIT_CODE 0
 240 # endif
 241 #endif
 242
 243 #ifndef FATAL_EXIT_CODE
 244 # ifdef EXIT_FAILURE
 245 #  define FATAL_EXIT_CODE EXIT_FAILURE
 246 # else
 247 #  define FATAL_EXIT_CODE 1
 248 # endif
 249 #endif
 250
 251 #define ICE_EXIT_CODE 4
 252
 253 #ifdef HAVE_UNISTD_H
 254 # include <unistd.h>
 255 #endif
 256
 257 #ifdef HAVE_SYS_PARAM_H
 258 # include <sys/param.h>
 259 /* We use this identifier later and it appears in some vendor param.h's.  */
 260 # undef PREFETCH
 261 #endif
 262
 263 #if HAVE_LIMITS_H
 264 # include <limits.h>
 265 #endif
 266
 267 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT.  */
 268 #include "hwint.h"
 269
 270 /* A macro to determine whether a VALUE lies inclusively within a
 271    certain range without evaluating the VALUE more than once.  This
 272    macro won't warn if the VALUE is unsigned and the LOWER bound is
 273    zero, as it would e.g. with "VALUE >= 0 && ...".  Note the LOWER
 274    bound *is* evaluated twice, and LOWER must not be greater than
 275    UPPER.  However the bounds themselves can be either positive or
 276    negative.  */
 277 #define IN_RANGE(VALUE, LOWER, UPPER) \
 278   ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
 279    <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
 280
 281 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 282    macros defined with these cannot be used in #if.  */
 283
 284 /* The extra casts work around common compiler bugs.  */
 285 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 286 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 287    It is necessary at least when t == time_t.  */
 288 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 289                              ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
 290 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 291
 292 /* Use that infrastructure to provide a few constants.  */
 293 #ifndef UCHAR_MAX
 294 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 295 #endif
 296
 297 #ifdef TIME_WITH_SYS_TIME
 298 # include <sys/time.h>
 299 # include <time.h>
 300 #else
 301 # if HAVE_SYS_TIME_H
 302 #  include <sys/time.h>
 303 # else
 304 #  ifdef HAVE_TIME_H
 305 #   include <time.h>
 306 #  endif
 307 # endif
 308 #endif
 309
 310 #ifdef HAVE_FCNTL_H
 311 # include <fcntl.h>
 312 #else
 313 # ifdef HAVE_SYS_FILE_H
 314 #  include <sys/file.h>
 315 # endif
 316 #endif
 317
 318 #ifndef SEEK_SET
 319 # define SEEK_SET 0
 320 # define SEEK_CUR 1
 321 # define SEEK_END 2
 322 #endif
 323 #ifndef F_OK
 324 # define F_OK 0
 325 # define X_OK 1
 326 # define W_OK 2
 327 # define R_OK 4
 328 #endif
 329 #ifndef O_RDONLY
 330 # define O_RDONLY 0
 331 #endif
 332 #ifndef O_WRONLY
 333 # define O_WRONLY 1
 334 #endif
 335 #ifndef O_BINARY
 336 # define O_BINARY 0
 337 #endif
 338
 339 /* Some systems define these in, e.g., param.h.  We undefine these names
 340    here to avoid the warnings.  We prefer to use our definitions since we
 341    know they are correct.  */
 342
 343 #undef MIN
 344 #undef MAX
 345 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 346 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 347
 348 /* Returns the least number N such that N * Y >= X.  */
 349 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 350
 351 #ifdef HAVE_SYS_WAIT_H
 352 #include <sys/wait.h>
 353 #endif
 354
 355 #ifndef WIFSIGNALED
 356 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 357 #endif
 358 #ifndef WTERMSIG
 359 #define WTERMSIG(S) ((S) & 0x7f)
 360 #endif
 361 #ifndef WIFEXITED
 362 #define WIFEXITED(S) (((S) & 0xff) == 0)
 363 #endif
 364 #ifndef WEXITSTATUS
 365 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 366 #endif
 367 #ifndef WSTOPSIG
 368 #define WSTOPSIG WEXITSTATUS
 369 #endif
 370 #ifndef WCOREDUMP
 371 #define WCOREDUMP(S) ((S) & WCOREFLG)
 372 #endif
 373 #ifndef WCOREFLG
 374 #define WCOREFLG 0200
 375 #endif
 376
 377 #include <signal.h>
 378 #if !defined (SIGCHLD) && defined (SIGCLD)
 379 # define SIGCHLD SIGCLD
 380 #endif
 381
 382 #ifdef HAVE_SYS_MMAN_H
 383 # include <sys/mman.h>
 384 #endif
 385
 386 #ifndef MAP_FAILED
 387 # define MAP_FAILED ((void *)-1)
 388 #endif
 389
 390 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
 391 # define MAP_ANONYMOUS MAP_ANON
 392 #endif
 393
 394 #ifdef HAVE_SYS_RESOURCE_H
 395 # include <sys/resource.h>
 396 #endif
 397
 398 #ifdef HAVE_SYS_TIMES_H
 399 # include <sys/times.h>
 400 #endif
 401
 402 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 403    are defined to 0 then we must provide the relevant declaration
 404    here.  These checks will be in the undefined state while configure
 405    is running so be careful to test "defined (HAVE_DECL_*)".  */
 406
 407 #ifdef __cplusplus
 408 extern "C" {
 409 #endif
 410
 411 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 412 extern double atof (const char *);
 413 #endif
 414
 415 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 416 extern long atol (const char *);
 417 #endif
 418
 419 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 420 extern void free (void *);
 421 #endif
 422
 423 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 424 extern char *getcwd (char *, size_t);
 425 #endif
 426
 427 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 428 extern char *getenv (const char *);
 429 #endif
 430
 431 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 432 extern int getopt (int, char * const *, const char *);
 433 #endif
 434
 435 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
 436 extern int getpagesize (void);
 437 #endif
 438
 439 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 440 extern char *getwd (char *);
 441 #endif
 442
 443 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 444 extern void *sbrk (int);
 445 #endif
 446
 447 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 448 extern char *strstr (const char *, const char *);
 449 #endif
 450
 451 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
 452 extern char *stpcpy (char *, const char *);
 453 #endif
 454
 455 #ifdef __cplusplus
 456 }
 457 #endif
 458
 459 #ifdef HAVE_MALLOC_H
 460 #include <malloc.h>
 461 #endif
 462
 463 #ifdef __cplusplus
 464 extern "C" {
 465 #endif
 466
 467 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 468 extern void *malloc (size_t);
 469 #endif
 470
 471 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 472 extern void *calloc (size_t, size_t);
 473 #endif
 474
 475 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 476 extern void *realloc (void *, size_t);
 477 #endif
 478
 479 #ifdef __cplusplus
 480 }
 481 #endif
 482
 483 #ifdef HAVE_STDINT_H
 484 #include <stdint.h>
 485 #endif
 486
 487 #ifdef HAVE_INTTYPES_H
 488 #include <inttypes.h>
 489 #endif
 490
 491 #ifdef __cplusplus
 492 extern "C" {
 493 #endif
 494
 495 /* If the system doesn't provide strsignal, we get it defined in
 496    libiberty but no declaration is supplied.  */
 497 #if !defined (HAVE_STRSIGNAL) \
 498     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 499 # ifndef strsignal
 500 extern const char *strsignal (int);
 501 # endif
 502 #endif
 503
 504 #ifdef HAVE_GETRLIMIT
 505 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 506 #  ifndef getrlimit
 507 struct rlimit;
 508 extern int getrlimit (int, struct rlimit *);
 509 #  endif
 510 # endif
 511 #endif
 512
 513 #ifdef HAVE_SETRLIMIT
 514 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 515 #  ifndef setrlimit
 516 struct rlimit;
 517 extern int setrlimit (int, const struct rlimit *);
 518 #  endif
 519 # endif
 520 #endif
 521
 522 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 523 extern void abort (void);
 524 #endif
 525
 526 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 527 extern int snprintf (char *, size_t, const char *, ...);
 528 #endif
 529
 530 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 531 extern int vsnprintf(char *, size_t, const char *, va_list);
 532 #endif
 533
 534 #ifdef __cplusplus
 535 }
 536 #endif
 537
 538 /* 1 if we have C99 designated initializers.  */
 539 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 540 #define HAVE_DESIGNATED_INITIALIZERS \
 541   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 542    && !defined(__cplusplus))
 543 #endif
 544
 545 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 546 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 547   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 548    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 549 #endif
 550
 551 #if HAVE_SYS_STAT_H
 552 # include <sys/stat.h>
 553 #endif
 554
 555 /* Test if something is a normal file.  */
 556 #ifndef S_ISREG
 557 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 558 #endif
 559
 560 /* Test if something is a directory.  */
 561 #ifndef S_ISDIR
 562 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 563 #endif
 564
 565 /* Test if something is a character special file.  */
 566 #ifndef S_ISCHR
 567 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 568 #endif
 569
 570 /* Test if something is a block special file.  */
 571 #ifndef S_ISBLK
 572 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 573 #endif
 574
 575 /* Test if something is a socket.  */
 576 #ifndef S_ISSOCK
 577 # ifdef S_IFSOCK
 578 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 579 # else
 580 #   define S_ISSOCK(m) 0
 581 # endif
 582 #endif
 583
 584 /* Test if something is a FIFO.  */
 585 #ifndef S_ISFIFO
 586 # ifdef S_IFIFO
 587 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 588 # else
 589 #  define S_ISFIFO(m) 0
 590 # endif
 591 #endif
 592
 593 /* Define well known filenos if the system does not define them.  */
 594 #ifndef STDIN_FILENO
 595 # define STDIN_FILENO   0
 596 #endif
 597 #ifndef STDOUT_FILENO
 598 # define STDOUT_FILENO  1
 599 #endif
 600 #ifndef STDERR_FILENO
 601 # define STDERR_FILENO  2
 602 #endif
 603
 604 /* Some systems have mkdir that takes a single argument.  */
 605 #ifdef MKDIR_TAKES_ONE_ARG
 606 # define mkdir(a,b) mkdir(a)
 607 #endif
 608
 609 #ifndef HAVE_KILL
 610 # define kill(p,s) raise(s)
 611 #endif
 612
 613 /* Provide a way to print an address via printf.  */
 614 #ifndef HOST_PTR_PRINTF
 615 #define HOST_PTR_PRINTF "%p"
 616 #endif /* ! HOST_PTR_PRINTF */
 617
 618 /* By default, colon separates directories in a path.  */
 619 #ifndef PATH_SEPARATOR
 620 #define PATH_SEPARATOR ':'
 621 #endif
 622
 623 /* Filename handling macros.  */
 624 #include "filenames.h"
 625
 626 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 627 #ifndef DIR_SEPARATOR
 628 # define DIR_SEPARATOR '/'
 629 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 630 #  define DIR_SEPARATOR_2 '\\'
 631 # endif
 632 #endif
 633
 634 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 635 /* If plugin support is enabled, we could use libdl.  */
 636 #include <dlfcn.h>
 637 #endif
 638
 639 /* Do not introduce a gmp.h dependency on the build system.  */
 640 #ifndef GENERATOR_FILE
 641 #include <gmp.h>
 642 #endif
 643
 644 /* Get libiberty declarations.  */
 645 #include "libiberty.h"
 646
 647 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 648 #undef FLOAT /* Likewise.  */
 649 #undef ABS /* Likewise.  */
 650 #undef PC /* Likewise.  */
 651
 652 /* Provide a default for the HOST_BIT_BUCKET.
 653    This suffices for POSIX-like hosts.  */
 654
 655 #ifndef HOST_BIT_BUCKET
 656 #define HOST_BIT_BUCKET "/dev/null"
 657 #endif
 658
 659 #ifndef offsetof
 660 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 661 #endif
 662
 663 /* Various error reporting routines want to use __FUNCTION__.  */
 664 #if (GCC_VERSION < 2007)
 665 #ifndef __FUNCTION__
 666 #define __FUNCTION__ "?"
 667 #endif /* ! __FUNCTION__ */
 668 #endif
 669
 670 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 671    the most likely value of A is B.  This feature was added at some point
 672    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 673 #if (GCC_VERSION < 3000)
 674 #define __builtin_expect(a, b) (a)
 675 #endif
 676
 677 /* Redefine abort to report an internal error w/o coredump, and
 678    reporting the location of the error in the source file.  */
 679 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 680 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 681
 682 /* Use gcc_assert(EXPR) to test invariants.  */
 683 #if ENABLE_ASSERT_CHECKING
 684 #define gcc_assert(EXPR)                                                \
 685    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 686 #elif (GCC_VERSION >= 4005)
 687 #define gcc_assert(EXPR)                                                \
 688   ((void)(__builtin_expect(!(EXPR), 0) ? __builtin_unreachable(), 0 : 0))
 689 #else
 690 /* Include EXPR, so that unused variable warnings do not occur.  */
 691 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 692 #endif
 693
 694 #ifdef ENABLE_CHECKING
 695 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 696 #else
 697 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 698 #endif
 699
 700 /* Use gcc_unreachable() to mark unreachable locations (like an
 701    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 702 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 703 #define gcc_unreachable() __builtin_unreachable()
 704 #else
 705 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 706 #endif
 707
 708 /* Provide a fake boolean type.  We make no attempt to use the
 709    C99 _Bool, as it may not be available in the bootstrap compiler,
 710    and even if it is, it is liable to be buggy.
 711    This must be after all inclusion of system headers, as some of
 712    them will mess us up.  */
 713
 714 #undef TRUE
 715 #undef FALSE
 716
 717 #ifdef __cplusplus
 718   /* Obsolete.  */
 719 # define TRUE true
 720 # define FALSE false
 721 #else /* !__cplusplus */
 722 # undef bool
 723 # undef true
 724 # undef false
 725
 726 # define bool unsigned char
 727 # define true 1
 728 # define false 0
 729
 730   /* Obsolete.  */
 731 # define TRUE true
 732 # define FALSE false
 733 #endif /* !__cplusplus */
 734
 735 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 736 #define BOOL_BITFIELD unsigned int
 737
 738 /* As the last action in this file, we poison the identifiers that
 739    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 740    preprocessor won't trip on poisoned identifiers that arrive from
 741    the expansion of macros.  E.g. #define strrchr rindex, won't error
 742    if rindex is poisoned after this directive is issued and later on
 743    strrchr is called.
 744
 745    Note: We define bypass macros for the few cases where we really
 746    want to use the libc memory allocation routines.  Otherwise we
 747    insist you use the "x" versions from libiberty.  */
 748
 749 #define really_call_malloc malloc
 750 #define really_call_calloc calloc
 751 #define really_call_realloc realloc
 752
 753 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 754 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 755    really_call_* cannot be used in a .l or .y file.  */
 756 #define malloc xmalloc
 757 #define realloc xrealloc
 758 #endif
 759
 760 #if (GCC_VERSION >= 3000)
 761
 762 /* Note autoconf checks for prototype declarations and includes
 763    system.h while doing so.  Only poison these tokens if actually
 764    compiling gcc, so that the autoconf declaration tests for malloc
 765    etc don't spuriously fail.  */
 766 #ifdef IN_GCC
 767 #undef calloc
 768 #undef strdup
 769  #pragma GCC poison calloc strdup
 770
 771 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 772 #undef malloc
 773 #undef realloc
 774  #pragma GCC poison malloc realloc
 775 #endif
 776
 777 /* The %m format should be used when GCC's main diagnostic functions
 778    supporting %m are available, and xstrerror from libiberty
 779    otherwise.  */
 780 #undef strerror
 781  #pragma GCC poison strerror
 782
 783 /* loc_t is defined on some systems and too inviting for some
 784    programmers to avoid.  */
 785 #undef loc_t
 786  #pragma GCC poison loc_t
 787
 788 /* Old target macros that have moved to the target hooks structure.  */
 789  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 790         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 791         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 792         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 793         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 794         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 795         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 796         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 797         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 798         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 799         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 800         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 801         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 802         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 803         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 804         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 805         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 806         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 807         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 808         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 809         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 810         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 811         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 812         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 813         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 814         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 815         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 816         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 817         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 818         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 819         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 820         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 821         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 822         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 823         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 824         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 825         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 826         OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
 827         ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK
 828
 829 /* Target macros only used for code built for the target, that have
 830    moved to libgcc-tm.h or have never been present elsewhere.  */
 831  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 832         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 833         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 834
 835 /* Other obsolete target macros, or macros that used to be in target
 836    headers and were not used, and may be obsolete or may never have
 837    been used.  */
 838  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 839         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 840         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 841         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 842         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 843         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 844         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 845         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 846         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 847         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 848         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 849         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 850         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 851         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 852         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 853         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 854         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 855         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 856         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 857         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 858         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 859         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 860         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 861         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 862         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 863         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 864         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 865         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 866         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 867         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 868         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 869         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 870         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 871         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 872         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 873         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 874         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 875         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 876         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 877         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 878         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 879         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 880         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 881         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 882         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 883         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 884         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 885         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 886         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 887         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 888         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 889         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 890         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 891         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 892         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 893         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 894         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 895         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 896         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 897         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 898         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT                    \
 899         LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO          \
 900         IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC    \
 901         DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT      \
 902         REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P                  \
 903         TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS       \
 904         IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP           \
 905         UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP                  \
 906         USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
 907         CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC                     \
 908         GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE              \
 909         ELIGIBLE_FOR_EPILOGUE_DELAY
 910
 911 /* Hooks that are no longer used.  */
 912  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 913         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 914         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 915         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 916         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 917         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
 918         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
 919         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
 920         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
 921         TARGET_IRA_COVER_CLASSES TARGET_HELP \
 922         TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
 923         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
 924         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
 925
 926 /* Arrays that were deleted in favor of a functional interface.  */
 927  #pragma GCC poison built_in_decls implicit_built_in_decls
 928
 929 /* Hooks into libgcc2.  */
 930  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
 931    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 932
 933 /* Miscellaneous macros that are no longer used.  */
 934  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
 935
 936 /* Libiberty macros that are no longer used in GCC.  */
 937 #undef ANSI_PROTOTYPES
 938 #undef PTR_CONST
 939 #undef LONG_DOUBLE
 940 #undef VPARAMS
 941 #undef VA_OPEN
 942 #undef VA_FIXEDARG
 943 #undef VA_CLOSE
 944 #undef VA_START
 945  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 946   VA_FIXEDARG VA_CLOSE VA_START
 947 #endif /* IN_GCC */
 948
 949 /* Front ends should never have to include middle-end headers.  Enforce
 950    this by poisoning the header double-include protection defines.  */
 951 #ifdef IN_GCC_FRONTEND
 952 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
 953 #endif
 954
 955 /* Note: not all uses of the `index' token (e.g. variable names and
 956    structure members) have been eliminated.  */
 957 #undef bcopy
 958 #undef bzero
 959 #undef bcmp
 960 #undef rindex
 961  #pragma GCC poison bcopy bzero bcmp rindex
 962
 963 #endif /* GCC >= 3.0 */
 964
 965 /* This macro allows casting away const-ness to pass -Wcast-qual
 966    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
 967    only be used in certain specific cases.  One valid case is where
 968    the C standard definitions or prototypes force you to.  E.g. if you
 969    need to free a const object, or if you pass a const string to
 970    execv, et al.  Another valid use would be in an allocation function
 971    that creates const objects that need to be initialized.  In some
 972    cases we have non-const functions that return the argument
 973    (e.g. next_nonnote_insn).  Rather than create const shadow
 974    functions, we can cast away const-ness in calling these interfaces
 975    if we're careful to verify that the called function does indeed not
 976    modify its argument and the return value is only used in a const
 977    context.  (This can be somewhat dangerous as these assumptions can
 978    change after the fact).  Beyond these uses, most other cases of
 979    using this macro should be viewed with extreme caution.  */
 980
 981 #ifdef __cplusplus
 982 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
 983 #else
 984 #if defined(__GNUC__) && GCC_VERSION > 4000
 985 /* GCC 4.0.x has a bug where it may ICE on this expression,
 986    so does GCC 3.4.x (PR17436).  */
 987 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
 988 #elif defined(__GNUC__)
 989 static inline char *
 990 helper_const_non_const_cast (const char *p)
 991 {
 992   union {
 993     const char *const_c;
 994     char *c;
 995   } val;
 996   val.const_c = p;
 997   return val.c;
 998 }
 999
1000 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1001         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1002 #else
1003 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1004 #endif
1005 #endif
1006 #define CONST_CAST(TYPE,X) CONST_CAST2(TYPE, const TYPE, (X))
1007 #define CONST_CAST_TREE(X) CONST_CAST(union tree_node *, (X))
1008 #define CONST_CAST_RTX(X) CONST_CAST(struct rtx_def *, (X))
1009 #define CONST_CAST_BB(X) CONST_CAST(struct basic_block_def *, (X))
1010 #define CONST_CAST_GIMPLE(X) CONST_CAST(union gimple_statement_d *, (X))
1011
1012 /* Activate certain diagnostics as warnings (not errors via the
1013    -Werror flag).  */
1014 #if GCC_VERSION >= 4003
1015 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1016    an error/-Werror).  */
1017 #ifndef ENABLE_ASSERT_CHECKING
1018 #pragma GCC diagnostic warning "-Wuninitialized"
1019 #endif
1020 #endif
1021
1022 #ifdef ENABLE_VALGRIND_CHECKING
1023 # ifdef HAVE_VALGRIND_MEMCHECK_H
1024 #  include <valgrind/memcheck.h>
1025 # elif defined HAVE_MEMCHECK_H
1026 #  include <memcheck.h>
1027 # else
1028 #  include <valgrind.h>
1029 # endif
1030 /* Compatibility macros to let valgrind 3.1 work.  */
1031 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1032 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1033 # endif
1034 # ifndef VALGRIND_MAKE_MEM_DEFINED
1035 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1036 # endif
1037 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1038 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1039 # endif
1040 #else
1041 /* Avoid #ifdef:s when we can help it.  */
1042 #define VALGRIND_DISCARD(x)
1043 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1044 #define VALGRIND_FREELIKE_BLOCK(x,y)
1045 #endif
1046
1047 /* In LTO -fwhole-program build we still want to keep the debug functions available
1048    for debugger.  Mark them as used to prevent removal.  */
1049 #if (GCC_VERSION > 4000)
1050 #define DEBUG_FUNCTION __attribute__ ((__used__))
1051 #define DEBUG_VARIABLE __attribute__ ((__used__))
1052 #else
1053 #define DEBUG_FUNCTION
1054 #define DEBUG_VARIABLE
1055 #endif
1056
1057 #endif /* ! GCC_SYSTEM_H */