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, 2012
   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
  51 /* Some of these are #define on some systems, e.g. on AIX to redirect
  52    the names to 64bit capable functions for LARGE_FILES support. These
  53    redefs are pointless here so we can override them.  */
  54
  55 #undef fopen
  56 #undef freopen
  57
  58 #define fopen(PATH,MODE) fopen_unlocked(PATH,MODE)
  59 #define fdopen(FILDES,MODE) fdopen_unlocked(FILDES,MODE)
  60 #define freopen(PATH,MODE,STREAM) freopen_unlocked(PATH,MODE,STREAM)
  61
  62 /* The compiler is not a multi-threaded application and therefore we
  63    do not have to use the locking functions.  In fact, using the locking
  64    functions can cause the compiler to be significantly slower under
  65    I/O bound conditions (such as -g -O0 on very large source files).
  66
  67    HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
  68    code is multi-thread safe by default.  If it is set to 0, then do
  69    not worry about using the _unlocked functions.
  70
  71    fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
  72    extensions and need to be prototyped by hand (since we do not
  73    define _GNU_SOURCE).  */
  74
  75 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
  76
  77 # ifdef HAVE_PUTC_UNLOCKED
  78 #  undef putc
  79 #  define putc(C, Stream) putc_unlocked (C, Stream)
  80 # endif
  81 # ifdef HAVE_PUTCHAR_UNLOCKED
  82 #  undef putchar
  83 #  define putchar(C) putchar_unlocked (C)
  84 # endif
  85 # ifdef HAVE_GETC_UNLOCKED
  86 #  undef getc
  87 #  define getc(Stream) getc_unlocked (Stream)
  88 # endif
  89 # ifdef HAVE_GETCHAR_UNLOCKED
  90 #  undef getchar
  91 #  define getchar() getchar_unlocked ()
  92 # endif
  93 # ifdef HAVE_FPUTC_UNLOCKED
  94 #  undef fputc
  95 #  define fputc(C, Stream) fputc_unlocked (C, Stream)
  96 # endif
  97
  98 #ifdef __cplusplus
  99 extern "C" {
 100 #endif
 101
 102 # ifdef HAVE_CLEARERR_UNLOCKED
 103 #  undef clearerr
 104 #  define clearerr(Stream) clearerr_unlocked (Stream)
 105 #  if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED
 106 extern void clearerr_unlocked (FILE *);
 107 #  endif
 108 # endif
 109 # ifdef HAVE_FEOF_UNLOCKED
 110 #  undef feof
 111 #  define feof(Stream) feof_unlocked (Stream)
 112 #  if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED
 113 extern int feof_unlocked (FILE *);
 114 #  endif
 115 # endif
 116 # ifdef HAVE_FILENO_UNLOCKED
 117 #  undef fileno
 118 #  define fileno(Stream) fileno_unlocked (Stream)
 119 #  if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED
 120 extern int fileno_unlocked (FILE *);
 121 #  endif
 122 # endif
 123 # ifdef HAVE_FFLUSH_UNLOCKED
 124 #  undef fflush
 125 #  define fflush(Stream) fflush_unlocked (Stream)
 126 #  if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED
 127 extern int fflush_unlocked (FILE *);
 128 #  endif
 129 # endif
 130 # ifdef HAVE_FGETC_UNLOCKED
 131 #  undef fgetc
 132 #  define fgetc(Stream) fgetc_unlocked (Stream)
 133 #  if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED
 134 extern int fgetc_unlocked (FILE *);
 135 #  endif
 136 # endif
 137 # ifdef HAVE_FGETS_UNLOCKED
 138 #  undef fgets
 139 #  define fgets(S, n, Stream) fgets_unlocked (S, n, Stream)
 140 #  if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED
 141 extern char *fgets_unlocked (char *, int, FILE *);
 142 #  endif
 143 # endif
 144 # ifdef HAVE_FPUTS_UNLOCKED
 145 #  undef fputs
 146 #  define fputs(String, Stream) fputs_unlocked (String, Stream)
 147 #  if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
 148 extern int fputs_unlocked (const char *, FILE *);
 149 #  endif
 150 # endif
 151 # ifdef HAVE_FERROR_UNLOCKED
 152 #  undef ferror
 153 #  define ferror(Stream) ferror_unlocked (Stream)
 154 #  if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED
 155 extern int ferror_unlocked (FILE *);
 156 #  endif
 157 # endif
 158 # ifdef HAVE_FREAD_UNLOCKED
 159 #  undef fread
 160 #  define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream)
 161 #  if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED
 162 extern size_t fread_unlocked (void *, size_t, size_t, FILE *);
 163 #  endif
 164 # endif
 165 # ifdef HAVE_FWRITE_UNLOCKED
 166 #  undef fwrite
 167 #  define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
 168 #  if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
 169 extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *);
 170 #  endif
 171 # endif
 172 # ifdef HAVE_FPRINTF_UNLOCKED
 173 #  undef fprintf
 174 /* We can't use a function-like macro here because we don't know if
 175    we have varargs macros.  */
 176 #  define fprintf fprintf_unlocked
 177 #  if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
 178 extern int fprintf_unlocked (FILE *, const char *, ...);
 179 #  endif
 180 # endif
 181
 182 #ifdef __cplusplus
 183 }
 184 #endif
 185
 186 #endif
 187
 188 /* ??? Glibc's fwrite/fread_unlocked macros cause
 189    "warning: signed and unsigned type in conditional expression".  */
 190 #undef fread_unlocked
 191 #undef fwrite_unlocked
 192
 193 /* There are an extraordinary number of issues with <ctype.h>.
 194    The last straw is that it varies with the locale.  Use libiberty's
 195    replacement instead.  */
 196 #include "safe-ctype.h"
 197
 198 #include <sys/types.h>
 199
 200 #include <errno.h>
 201
 202 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
 203 extern int errno;
 204 #endif
 205
 206 #ifdef __cplusplus
 207 # include <cstring>
 208 #endif
 209
 210 /* Some of glibc's string inlines cause warnings.  Plus we'd rather
 211    rely on (and therefore test) GCC's string builtins.  */
 212 #define __NO_STRING_INLINES
 213
 214 #ifdef STRING_WITH_STRINGS
 215 # include <string.h>
 216 # include <strings.h>
 217 #else
 218 # ifdef HAVE_STRING_H
 219 #  include <string.h>
 220 # else
 221 #  ifdef HAVE_STRINGS_H
 222 #   include <strings.h>
 223 #  endif
 224 # endif
 225 #endif
 226
 227 #ifdef HAVE_STDLIB_H
 228 # include <stdlib.h>
 229 #endif
 230
 231 /* Undef vec_free from AIX stdlib.h header which conflicts with vec.h.  */
 232 #undef vec_free
 233
 234 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
 235    FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
 236    or 0 and 1 if those macros are not defined.  */
 237 #ifndef SUCCESS_EXIT_CODE
 238 # ifdef EXIT_SUCCESS
 239 #  define SUCCESS_EXIT_CODE EXIT_SUCCESS
 240 # else
 241 #  define SUCCESS_EXIT_CODE 0
 242 # endif
 243 #endif
 244
 245 #ifndef FATAL_EXIT_CODE
 246 # ifdef EXIT_FAILURE
 247 #  define FATAL_EXIT_CODE EXIT_FAILURE
 248 # else
 249 #  define FATAL_EXIT_CODE 1
 250 # endif
 251 #endif
 252
 253 #define ICE_EXIT_CODE 4
 254
 255 #ifdef HAVE_UNISTD_H
 256 # include <unistd.h>
 257 #endif
 258
 259 #ifdef HAVE_SYS_PARAM_H
 260 # include <sys/param.h>
 261 /* We use this identifier later and it appears in some vendor param.h's.  */
 262 # undef PREFETCH
 263 #endif
 264
 265 #if HAVE_LIMITS_H
 266 # include <limits.h>
 267 #endif
 268
 269 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT.  */
 270 #include "hwint.h"
 271
 272 /* A macro to determine whether a VALUE lies inclusively within a
 273    certain range without evaluating the VALUE more than once.  This
 274    macro won't warn if the VALUE is unsigned and the LOWER bound is
 275    zero, as it would e.g. with "VALUE >= 0 && ...".  Note the LOWER
 276    bound *is* evaluated twice, and LOWER must not be greater than
 277    UPPER.  However the bounds themselves can be either positive or
 278    negative.  */
 279 #define IN_RANGE(VALUE, LOWER, UPPER) \
 280   ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
 281    <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
 282
 283 /* Infrastructure for defining missing _MAX and _MIN macros.  Note that
 284    macros defined with these cannot be used in #if.  */
 285
 286 /* The extra casts work around common compiler bugs.  */
 287 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 288 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
 289    It is necessary at least when t == time_t.  */
 290 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
 291                              ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
 292 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
 293
 294 /* Use that infrastructure to provide a few constants.  */
 295 #ifndef UCHAR_MAX
 296 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
 297 #endif
 298
 299 #ifdef TIME_WITH_SYS_TIME
 300 # include <sys/time.h>
 301 # include <time.h>
 302 #else
 303 # if HAVE_SYS_TIME_H
 304 #  include <sys/time.h>
 305 # else
 306 #  ifdef HAVE_TIME_H
 307 #   include <time.h>
 308 #  endif
 309 # endif
 310 #endif
 311
 312 #ifdef HAVE_FCNTL_H
 313 # include <fcntl.h>
 314 #else
 315 # ifdef HAVE_SYS_FILE_H
 316 #  include <sys/file.h>
 317 # endif
 318 #endif
 319
 320 #ifndef SEEK_SET
 321 # define SEEK_SET 0
 322 # define SEEK_CUR 1
 323 # define SEEK_END 2
 324 #endif
 325 #ifndef F_OK
 326 # define F_OK 0
 327 # define X_OK 1
 328 # define W_OK 2
 329 # define R_OK 4
 330 #endif
 331 #ifndef O_RDONLY
 332 # define O_RDONLY 0
 333 #endif
 334 #ifndef O_WRONLY
 335 # define O_WRONLY 1
 336 #endif
 337 #ifndef O_BINARY
 338 # define O_BINARY 0
 339 #endif
 340
 341 /* Some systems define these in, e.g., param.h.  We undefine these names
 342    here to avoid the warnings.  We prefer to use our definitions since we
 343    know they are correct.  */
 344
 345 #undef MIN
 346 #undef MAX
 347 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
 348 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
 349
 350 /* Returns the least number N such that N * Y >= X.  */
 351 #define CEIL(x,y) (((x) + (y) - 1) / (y))
 352
 353 #ifdef HAVE_SYS_WAIT_H
 354 #include <sys/wait.h>
 355 #endif
 356
 357 #ifndef WIFSIGNALED
 358 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
 359 #endif
 360 #ifndef WTERMSIG
 361 #define WTERMSIG(S) ((S) & 0x7f)
 362 #endif
 363 #ifndef WIFEXITED
 364 #define WIFEXITED(S) (((S) & 0xff) == 0)
 365 #endif
 366 #ifndef WEXITSTATUS
 367 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
 368 #endif
 369 #ifndef WSTOPSIG
 370 #define WSTOPSIG WEXITSTATUS
 371 #endif
 372 #ifndef WCOREDUMP
 373 #define WCOREDUMP(S) ((S) & WCOREFLG)
 374 #endif
 375 #ifndef WCOREFLG
 376 #define WCOREFLG 0200
 377 #endif
 378
 379 #include <signal.h>
 380 #if !defined (SIGCHLD) && defined (SIGCLD)
 381 # define SIGCHLD SIGCLD
 382 #endif
 383
 384 #ifdef HAVE_SYS_MMAN_H
 385 # include <sys/mman.h>
 386 #endif
 387
 388 #ifndef MAP_FAILED
 389 # define MAP_FAILED ((void *)-1)
 390 #endif
 391
 392 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
 393 # define MAP_ANONYMOUS MAP_ANON
 394 #endif
 395
 396 #ifdef HAVE_SYS_RESOURCE_H
 397 # include <sys/resource.h>
 398 #endif
 399
 400 #ifdef HAVE_SYS_TIMES_H
 401 # include <sys/times.h>
 402 #endif
 403
 404 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
 405    are defined to 0 then we must provide the relevant declaration
 406    here.  These checks will be in the undefined state while configure
 407    is running so be careful to test "defined (HAVE_DECL_*)".  */
 408
 409 #ifdef __cplusplus
 410 extern "C" {
 411 #endif
 412
 413 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
 414 extern double atof (const char *);
 415 #endif
 416
 417 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
 418 extern long atol (const char *);
 419 #endif
 420
 421 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
 422 extern void free (void *);
 423 #endif
 424
 425 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
 426 extern char *getcwd (char *, size_t);
 427 #endif
 428
 429 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
 430 extern char *getenv (const char *);
 431 #endif
 432
 433 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
 434 extern int getopt (int, char * const *, const char *);
 435 #endif
 436
 437 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
 438 extern int getpagesize (void);
 439 #endif
 440
 441 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
 442 extern char *getwd (char *);
 443 #endif
 444
 445 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
 446 extern void *sbrk (int);
 447 #endif
 448
 449 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
 450 extern char *strstr (const char *, const char *);
 451 #endif
 452
 453 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
 454 extern char *stpcpy (char *, const char *);
 455 #endif
 456
 457 #ifdef __cplusplus
 458 }
 459 #endif
 460
 461 #ifdef HAVE_MALLOC_H
 462 #include <malloc.h>
 463 #endif
 464
 465 #ifdef __cplusplus
 466 extern "C" {
 467 #endif
 468
 469 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
 470 extern void *malloc (size_t);
 471 #endif
 472
 473 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
 474 extern void *calloc (size_t, size_t);
 475 #endif
 476
 477 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
 478 extern void *realloc (void *, size_t);
 479 #endif
 480
 481 #ifdef __cplusplus
 482 }
 483 #endif
 484
 485 #ifdef HAVE_STDINT_H
 486 #include <stdint.h>
 487 #endif
 488
 489 #ifdef HAVE_INTTYPES_H
 490 #include <inttypes.h>
 491 #endif
 492
 493 #ifdef __cplusplus
 494 extern "C" {
 495 #endif
 496
 497 /* If the system doesn't provide strsignal, we get it defined in
 498    libiberty but no declaration is supplied.  */
 499 #if !defined (HAVE_STRSIGNAL) \
 500     || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
 501 # ifndef strsignal
 502 extern const char *strsignal (int);
 503 # endif
 504 #endif
 505
 506 #ifdef HAVE_GETRLIMIT
 507 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
 508 #  ifndef getrlimit
 509 struct rlimit;
 510 extern int getrlimit (int, struct rlimit *);
 511 #  endif
 512 # endif
 513 #endif
 514
 515 #ifdef HAVE_SETRLIMIT
 516 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
 517 #  ifndef setrlimit
 518 struct rlimit;
 519 extern int setrlimit (int, const struct rlimit *);
 520 #  endif
 521 # endif
 522 #endif
 523
 524 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
 525 extern void abort (void);
 526 #endif
 527
 528 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
 529 extern int snprintf (char *, size_t, const char *, ...);
 530 #endif
 531
 532 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
 533 extern int vsnprintf(char *, size_t, const char *, va_list);
 534 #endif
 535
 536 #ifdef __cplusplus
 537 }
 538 #endif
 539
 540 /* 1 if we have C99 designated initializers.  */
 541 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
 542 #define HAVE_DESIGNATED_INITIALIZERS \
 543   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 544    && !defined(__cplusplus))
 545 #endif
 546
 547 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
 548 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
 549   (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
 550    && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
 551 #endif
 552
 553 #if HAVE_SYS_STAT_H
 554 # include <sys/stat.h>
 555 #endif
 556
 557 /* Test if something is a normal file.  */
 558 #ifndef S_ISREG
 559 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 560 #endif
 561
 562 /* Test if something is a directory.  */
 563 #ifndef S_ISDIR
 564 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 565 #endif
 566
 567 /* Test if something is a character special file.  */
 568 #ifndef S_ISCHR
 569 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 570 #endif
 571
 572 /* Test if something is a block special file.  */
 573 #ifndef S_ISBLK
 574 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
 575 #endif
 576
 577 /* Test if something is a socket.  */
 578 #ifndef S_ISSOCK
 579 # ifdef S_IFSOCK
 580 #   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
 581 # else
 582 #   define S_ISSOCK(m) 0
 583 # endif
 584 #endif
 585
 586 /* Test if something is a FIFO.  */
 587 #ifndef S_ISFIFO
 588 # ifdef S_IFIFO
 589 #  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
 590 # else
 591 #  define S_ISFIFO(m) 0
 592 # endif
 593 #endif
 594
 595 /* Define well known filenos if the system does not define them.  */
 596 #ifndef STDIN_FILENO
 597 # define STDIN_FILENO   0
 598 #endif
 599 #ifndef STDOUT_FILENO
 600 # define STDOUT_FILENO  1
 601 #endif
 602 #ifndef STDERR_FILENO
 603 # define STDERR_FILENO  2
 604 #endif
 605
 606 /* Some systems have mkdir that takes a single argument.  */
 607 #ifdef MKDIR_TAKES_ONE_ARG
 608 # define mkdir(a,b) mkdir(a)
 609 #endif
 610
 611 #ifndef HAVE_KILL
 612 # define kill(p,s) raise(s)
 613 #endif
 614
 615 /* Provide a way to print an address via printf.  */
 616 #ifndef HOST_PTR_PRINTF
 617 #define HOST_PTR_PRINTF "%p"
 618 #endif /* ! HOST_PTR_PRINTF */
 619
 620 /* By default, colon separates directories in a path.  */
 621 #ifndef PATH_SEPARATOR
 622 #define PATH_SEPARATOR ':'
 623 #endif
 624
 625 /* Filename handling macros.  */
 626 #include "filenames.h"
 627
 628 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible.  */
 629 #ifndef DIR_SEPARATOR
 630 # define DIR_SEPARATOR '/'
 631 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
 632 #  define DIR_SEPARATOR_2 '\\'
 633 # endif
 634 #endif
 635
 636 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
 637 /* If plugin support is enabled, we could use libdl.  */
 638 #include <dlfcn.h>
 639 #endif
 640
 641 /* Get libiberty declarations.  */
 642 #include "libiberty.h"
 643
 644 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 645 #undef FLOAT /* Likewise.  */
 646 #undef ABS /* Likewise.  */
 647 #undef PC /* Likewise.  */
 648
 649 /* Provide a default for the HOST_BIT_BUCKET.
 650    This suffices for POSIX-like hosts.  */
 651
 652 #ifndef HOST_BIT_BUCKET
 653 #define HOST_BIT_BUCKET "/dev/null"
 654 #endif
 655
 656 #ifndef offsetof
 657 #define offsetof(TYPE, MEMBER)  ((size_t) &((TYPE *) 0)->MEMBER)
 658 #endif
 659
 660 /* Various error reporting routines want to use __FUNCTION__.  */
 661 #if (GCC_VERSION < 2007)
 662 #ifndef __FUNCTION__
 663 #define __FUNCTION__ "?"
 664 #endif /* ! __FUNCTION__ */
 665 #endif
 666
 667 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
 668    the most likely value of A is B.  This feature was added at some point
 669    between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
 670 #if (GCC_VERSION < 3000)
 671 #define __builtin_expect(a, b) (a)
 672 #endif
 673
 674 /* Redefine abort to report an internal error w/o coredump, and
 675    reporting the location of the error in the source file.  */
 676 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 677 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
 678
 679 /* Use gcc_assert(EXPR) to test invariants.  */
 680 #if ENABLE_ASSERT_CHECKING
 681 #define gcc_assert(EXPR)                                                \
 682    ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
 683 #elif (GCC_VERSION >= 4005)
 684 #define gcc_assert(EXPR)                                                \
 685   ((void)(__builtin_expect(!(EXPR), 0) ? __builtin_unreachable(), 0 : 0))
 686 #else
 687 /* Include EXPR, so that unused variable warnings do not occur.  */
 688 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
 689 #endif
 690
 691 #ifdef ENABLE_CHECKING
 692 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
 693 #else
 694 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
 695 #endif
 696
 697 /* Use gcc_unreachable() to mark unreachable locations (like an
 698    unreachable default case of a switch.  Do not use gcc_assert(0).  */
 699 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
 700 #define gcc_unreachable() __builtin_unreachable()
 701 #else
 702 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
 703 #endif
 704
 705 /* Provide a fake boolean type.  We make no attempt to use the
 706    C99 _Bool, as it may not be available in the bootstrap compiler,
 707    and even if it is, it is liable to be buggy.
 708    This must be after all inclusion of system headers, as some of
 709    them will mess us up.  */
 710
 711 #undef TRUE
 712 #undef FALSE
 713
 714 #ifdef __cplusplus
 715   /* Obsolete.  */
 716 # define TRUE true
 717 # define FALSE false
 718 #else /* !__cplusplus */
 719 # undef bool
 720 # undef true
 721 # undef false
 722
 723 # define bool unsigned char
 724 # define true 1
 725 # define false 0
 726
 727   /* Obsolete.  */
 728 # define TRUE true
 729 # define FALSE false
 730 #endif /* !__cplusplus */
 731
 732 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 733 #define BOOL_BITFIELD unsigned int
 734
 735 /* As the last action in this file, we poison the identifiers that
 736    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
 737    preprocessor won't trip on poisoned identifiers that arrive from
 738    the expansion of macros.  E.g. #define strrchr rindex, won't error
 739    if rindex is poisoned after this directive is issued and later on
 740    strrchr is called.
 741
 742    Note: We define bypass macros for the few cases where we really
 743    want to use the libc memory allocation routines.  Otherwise we
 744    insist you use the "x" versions from libiberty.  */
 745
 746 #define really_call_malloc malloc
 747 #define really_call_calloc calloc
 748 #define really_call_realloc realloc
 749
 750 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
 751 /* Flex and bison use malloc and realloc.  Yuk.  Note that this means
 752    really_call_* cannot be used in a .l or .y file.  */
 753 #define malloc xmalloc
 754 #define realloc xrealloc
 755 #endif
 756
 757 #if (GCC_VERSION >= 3000)
 758
 759 /* Note autoconf checks for prototype declarations and includes
 760    system.h while doing so.  Only poison these tokens if actually
 761    compiling gcc, so that the autoconf declaration tests for malloc
 762    etc don't spuriously fail.  */
 763 #ifdef IN_GCC
 764 #undef calloc
 765 #undef strdup
 766  #pragma GCC poison calloc strdup
 767
 768 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
 769 #undef malloc
 770 #undef realloc
 771  #pragma GCC poison malloc realloc
 772 #endif
 773
 774 /* The %m format should be used when GCC's main diagnostic functions
 775    supporting %m are available, and xstrerror from libiberty
 776    otherwise.  */
 777 #undef strerror
 778  #pragma GCC poison strerror
 779
 780 /* loc_t is defined on some systems and too inviting for some
 781    programmers to avoid.  */
 782 #undef loc_t
 783  #pragma GCC poison loc_t
 784
 785 /* Old target macros that have moved to the target hooks structure.  */
 786  #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN                      \
 787         FUNCTION_PROLOGUE FUNCTION_EPILOGUE                             \
 788         FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE                   \
 789         DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES  \
 790         VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE       \
 791         SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES         \
 792         MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES     \
 793         MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR       \
 794         ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE       \
 795         WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
 796         ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL     \
 797         ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS     \
 798         ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
 799         ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
 800         INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
 801         DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL   \
 802         MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
 803         PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM     \
 804         ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
 805         STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
 806         PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
 807         SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
 808         DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
 809         HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX      \
 810         MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE               \
 811         VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN                  \
 812         FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL              \
 813         ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
 814         CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE         \
 815         TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING    \
 816         RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS           \
 817         OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P                     \
 818         USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO                        \
 819         LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP                        \
 820         LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP          \
 821         CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME        \
 822         HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
 823         OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
 824         ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK
 825
 826 /* Target macros only used for code built for the target, that have
 827    moved to libgcc-tm.h or have never been present elsewhere.  */
 828  #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX          \
 829         MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK   \
 830         REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
 831
 832 /* Other obsolete target macros, or macros that used to be in target
 833    headers and were not used, and may be obsolete or may never have
 834    been used.  */
 835  #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES     \
 836         ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK    \
 837         DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
 838         OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR                      \
 839         LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC      \
 840         STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE          \
 841         SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH   \
 842         TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE                      \
 843         NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
 844         BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER         \
 845         FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE                    \
 846         MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER      \
 847         ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN    \
 848         OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE    \
 849         ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT        \
 850         DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME         \
 851         DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE             \
 852         INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT    \
 853         EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER         \
 854         LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES       \
 855         LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE                    \
 856         CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME     \
 857         FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP          \
 858         PROMOTED_MODE EXPAND_BUILTIN_VA_END                                \
 859         LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE    \
 860         GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE    \
 861         MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD      \
 862         FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE              \
 863         TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
 864         DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
 865         SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
 866         SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
 867         DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG     \
 868         COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB  \
 869         ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER        \
 870         GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER          \
 871         PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END          \
 872         DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE          \
 873         NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE                \
 874         CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0   \
 875         TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT           \
 876         LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE                \
 877         TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC         \
 878         PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP      \
 879         EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION       \
 880         TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION           \
 881         SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON       \
 882         ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE                    \
 883         STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD                  \
 884         ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE                 \
 885         ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES  \
 886         SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
 887         TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP          \
 888         HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE   \
 889         FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
 890         USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
 891         FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
 892         MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
 893         SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES                     \
 894         PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR                   \
 895         STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT                    \
 896         LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO          \
 897         IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC    \
 898         DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT      \
 899         REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P                  \
 900         TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS       \
 901         IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP           \
 902         UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP                  \
 903         USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
 904         CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC                     \
 905         GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE              \
 906         ELIGIBLE_FOR_EPILOGUE_DELAY
 907
 908 /* Hooks that are no longer used.  */
 909  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE   \
 910         LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
 911         LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
 912         LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
 913         LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
 914         LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
 915         TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
 916         LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
 917         TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
 918         TARGET_IRA_COVER_CLASSES TARGET_HELP \
 919         TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
 920         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
 921         TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
 922
 923 /* Arrays that were deleted in favor of a functional interface.  */
 924  #pragma GCC poison built_in_decls implicit_built_in_decls
 925
 926 /* Hooks into libgcc2.  */
 927  #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
 928    LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
 929
 930 /* Miscellaneous macros that are no longer used.  */
 931  #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
 932
 933 /* Libiberty macros that are no longer used in GCC.  */
 934 #undef ANSI_PROTOTYPES
 935 #undef PTR_CONST
 936 #undef LONG_DOUBLE
 937 #undef VPARAMS
 938 #undef VA_OPEN
 939 #undef VA_FIXEDARG
 940 #undef VA_CLOSE
 941 #undef VA_START
 942  #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
 943   VA_FIXEDARG VA_CLOSE VA_START
 944 #endif /* IN_GCC */
 945
 946 /* Front ends should never have to include middle-end headers.  Enforce
 947    this by poisoning the header double-include protection defines.  */
 948 #ifdef IN_GCC_FRONTEND
 949 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
 950 #endif
 951
 952 /* Note: not all uses of the `index' token (e.g. variable names and
 953    structure members) have been eliminated.  */
 954 #undef bcopy
 955 #undef bzero
 956 #undef bcmp
 957 #undef rindex
 958  #pragma GCC poison bcopy bzero bcmp rindex
 959
 960 #endif /* GCC >= 3.0 */
 961
 962 /* This macro allows casting away const-ness to pass -Wcast-qual
 963    warnings.  DO NOT USE THIS UNLESS YOU REALLY HAVE TO!  It should
 964    only be used in certain specific cases.  One valid case is where
 965    the C standard definitions or prototypes force you to.  E.g. if you
 966    need to free a const object, or if you pass a const string to
 967    execv, et al.  Another valid use would be in an allocation function
 968    that creates const objects that need to be initialized.  In some
 969    cases we have non-const functions that return the argument
 970    (e.g. next_nonnote_insn).  Rather than create const shadow
 971    functions, we can cast away const-ness in calling these interfaces
 972    if we're careful to verify that the called function does indeed not
 973    modify its argument and the return value is only used in a const
 974    context.  (This can be somewhat dangerous as these assumptions can
 975    change after the fact).  Beyond these uses, most other cases of
 976    using this macro should be viewed with extreme caution.  */
 977
 978 #ifdef __cplusplus
 979 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
 980 #else
 981 #if defined(__GNUC__) && GCC_VERSION > 4000
 982 /* GCC 4.0.x has a bug where it may ICE on this expression,
 983    so does GCC 3.4.x (PR17436).  */
 984 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
 985 #elif defined(__GNUC__)
 986 static inline char *
 987 helper_const_non_const_cast (const char *p)
 988 {
 989   union {
 990     const char *const_c;
 991     char *c;
 992   } val;
 993   val.const_c = p;
 994   return val.c;
 995 }
 996
 997 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
 998         ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
 999 #else
1000 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1001 #endif
1002 #endif
1003 #define CONST_CAST(TYPE,X) CONST_CAST2(TYPE, const TYPE, (X))
1004 #define CONST_CAST_TREE(X) CONST_CAST(union tree_node *, (X))
1005 #define CONST_CAST_RTX(X) CONST_CAST(struct rtx_def *, (X))
1006 #define CONST_CAST_BB(X) CONST_CAST(struct basic_block_def *, (X))
1007 #define CONST_CAST_GIMPLE(X) CONST_CAST(union gimple_statement_d *, (X))
1008
1009 /* Activate certain diagnostics as warnings (not errors via the
1010    -Werror flag).  */
1011 #if GCC_VERSION >= 4003
1012 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1013    an error/-Werror).  */
1014 #ifndef ENABLE_ASSERT_CHECKING
1015 #pragma GCC diagnostic warning "-Wuninitialized"
1016 #endif
1017 #endif
1018
1019 #ifdef ENABLE_VALGRIND_CHECKING
1020 # ifdef HAVE_VALGRIND_MEMCHECK_H
1021 #  include <valgrind/memcheck.h>
1022 # elif defined HAVE_MEMCHECK_H
1023 #  include <memcheck.h>
1024 # else
1025 #  include <valgrind.h>
1026 # endif
1027 /* Compatibility macros to let valgrind 3.1 work.  */
1028 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1029 #  define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1030 # endif
1031 # ifndef VALGRIND_MAKE_MEM_DEFINED
1032 #  define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1033 # endif
1034 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1035 #  define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1036 # endif
1037 #else
1038 /* Avoid #ifdef:s when we can help it.  */
1039 #define VALGRIND_DISCARD(x)
1040 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1041 #define VALGRIND_FREELIKE_BLOCK(x,y)
1042 #endif
1043
1044 /* In LTO -fwhole-program build we still want to keep the debug functions available
1045    for debugger.  Mark them as used to prevent removal.  */
1046 #if (GCC_VERSION > 4000)
1047 #define DEBUG_FUNCTION __attribute__ ((__used__))
1048 #define DEBUG_VARIABLE __attribute__ ((__used__))
1049 #else
1050 #define DEBUG_FUNCTION
1051 #define DEBUG_VARIABLE
1052 #endif
1053
1054 #endif /* ! GCC_SYSTEM_H */