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