gcc/
[official-gcc.git] / gcc / system.h
blob9ca5b5fadd365bd283509de7fcba76da9acfab29
1 /* Get common system includes and various definitions and declarations based
2 on autoconf macros.
3 Copyright (C) 1998-2015 Free Software Foundation, Inc.
5 This file is part of GCC.
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.
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.
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/>. */
22 #ifndef GCC_SYSTEM_H
23 #define GCC_SYSTEM_H
25 /* Define this so that inttypes.h defines the PRI?64 macros even
26 when compiling with a C++ compiler. Define it here so in the
27 event inttypes.h gets pulled in by another header it is already
28 defined. */
29 #define __STDC_FORMAT_MACROS
31 /* We must include stdarg.h before stdio.h. */
32 #include <stdarg.h>
34 #ifndef va_copy
35 # ifdef __va_copy
36 # define va_copy(d,s) __va_copy (d, s)
37 # else
38 # define va_copy(d,s) ((d) = (s))
39 # endif
40 #endif
42 #ifdef HAVE_STDDEF_H
43 # include <stddef.h>
44 #endif
46 #include <stdio.h>
48 /* Define a generic NULL if one hasn't already been defined. */
49 #ifndef NULL
50 #define NULL 0
51 #endif
53 /* Use the unlocked open routines from libiberty. */
55 /* Some of these are #define on some systems, e.g. on AIX to redirect
56 the names to 64bit capable functions for LARGE_FILES support. These
57 redefs are pointless here so we can override them. */
59 #undef fopen
60 #undef freopen
62 #define fopen(PATH, MODE) fopen_unlocked (PATH, MODE)
63 #define fdopen(FILDES, MODE) fdopen_unlocked (FILDES, MODE)
64 #define freopen(PATH, MODE, STREAM) freopen_unlocked (PATH, MODE, STREAM)
66 /* The compiler is not a multi-threaded application and therefore we
67 do not have to use the locking functions. In fact, using the locking
68 functions can cause the compiler to be significantly slower under
69 I/O bound conditions (such as -g -O0 on very large source files).
71 HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
72 code is multi-thread safe by default. If it is set to 0, then do
73 not worry about using the _unlocked functions.
75 fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
76 extensions and need to be prototyped by hand (since we do not
77 define _GNU_SOURCE). */
79 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
81 # ifdef HAVE_PUTC_UNLOCKED
82 # undef putc
83 # define putc(C, Stream) putc_unlocked (C, Stream)
84 # endif
85 # ifdef HAVE_PUTCHAR_UNLOCKED
86 # undef putchar
87 # define putchar(C) putchar_unlocked (C)
88 # endif
89 # ifdef HAVE_GETC_UNLOCKED
90 # undef getc
91 # define getc(Stream) getc_unlocked (Stream)
92 # endif
93 # ifdef HAVE_GETCHAR_UNLOCKED
94 # undef getchar
95 # define getchar() getchar_unlocked ()
96 # endif
97 # ifdef HAVE_FPUTC_UNLOCKED
98 # undef fputc
99 # define fputc(C, Stream) fputc_unlocked (C, Stream)
100 # endif
102 #ifdef __cplusplus
103 extern "C" {
104 #endif
106 # ifdef HAVE_CLEARERR_UNLOCKED
107 # undef clearerr
108 # define clearerr(Stream) clearerr_unlocked (Stream)
109 # if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED
110 extern void clearerr_unlocked (FILE *);
111 # endif
112 # endif
113 # ifdef HAVE_FEOF_UNLOCKED
114 # undef feof
115 # define feof(Stream) feof_unlocked (Stream)
116 # if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED
117 extern int feof_unlocked (FILE *);
118 # endif
119 # endif
120 # ifdef HAVE_FILENO_UNLOCKED
121 # undef fileno
122 # define fileno(Stream) fileno_unlocked (Stream)
123 # if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED
124 extern int fileno_unlocked (FILE *);
125 # endif
126 # endif
127 # ifdef HAVE_FFLUSH_UNLOCKED
128 # undef fflush
129 # define fflush(Stream) fflush_unlocked (Stream)
130 # if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED
131 extern int fflush_unlocked (FILE *);
132 # endif
133 # endif
134 # ifdef HAVE_FGETC_UNLOCKED
135 # undef fgetc
136 # define fgetc(Stream) fgetc_unlocked (Stream)
137 # if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED
138 extern int fgetc_unlocked (FILE *);
139 # endif
140 # endif
141 # ifdef HAVE_FGETS_UNLOCKED
142 # undef fgets
143 # define fgets(S, n, Stream) fgets_unlocked (S, n, Stream)
144 # if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED
145 extern char *fgets_unlocked (char *, int, FILE *);
146 # endif
147 # endif
148 # ifdef HAVE_FPUTS_UNLOCKED
149 # undef fputs
150 # define fputs(String, Stream) fputs_unlocked (String, Stream)
151 # if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
152 extern int fputs_unlocked (const char *, FILE *);
153 # endif
154 # endif
155 # ifdef HAVE_FERROR_UNLOCKED
156 # undef ferror
157 # define ferror(Stream) ferror_unlocked (Stream)
158 # if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED
159 extern int ferror_unlocked (FILE *);
160 # endif
161 # endif
162 # ifdef HAVE_FREAD_UNLOCKED
163 # undef fread
164 # define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream)
165 # if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED
166 extern size_t fread_unlocked (void *, size_t, size_t, FILE *);
167 # endif
168 # endif
169 # ifdef HAVE_FWRITE_UNLOCKED
170 # undef fwrite
171 # define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
172 # if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
173 extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *);
174 # endif
175 # endif
176 # ifdef HAVE_FPRINTF_UNLOCKED
177 # undef fprintf
178 /* We can't use a function-like macro here because we don't know if
179 we have varargs macros. */
180 # define fprintf fprintf_unlocked
181 # if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
182 extern int fprintf_unlocked (FILE *, const char *, ...);
183 # endif
184 # endif
186 #ifdef __cplusplus
188 #endif
190 #endif
192 /* ??? Glibc's fwrite/fread_unlocked macros cause
193 "warning: signed and unsigned type in conditional expression". */
194 #undef fread_unlocked
195 #undef fwrite_unlocked
197 /* Include <string> before "safe-ctype.h" to avoid GCC poisoning
198 the ctype macros through safe-ctype.h */
200 #ifdef __cplusplus
201 # include <string>
202 #endif
204 /* There are an extraordinary number of issues with <ctype.h>.
205 The last straw is that it varies with the locale. Use libiberty's
206 replacement instead. */
207 #include "safe-ctype.h"
209 #include <sys/types.h>
211 #include <errno.h>
213 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
214 extern int errno;
215 #endif
217 #ifdef __cplusplus
218 # include <algorithm>
219 # include <cstring>
220 # include <utility>
221 #endif
223 /* Some of glibc's string inlines cause warnings. Plus we'd rather
224 rely on (and therefore test) GCC's string builtins. */
225 #define __NO_STRING_INLINES
227 #ifdef STRING_WITH_STRINGS
228 # include <string.h>
229 # include <strings.h>
230 #else
231 # ifdef HAVE_STRING_H
232 # include <string.h>
233 # else
234 # ifdef HAVE_STRINGS_H
235 # include <strings.h>
236 # endif
237 # endif
238 #endif
240 #ifdef HAVE_STDLIB_H
241 # include <stdlib.h>
242 #endif
244 /* When compiling C++ we need to include <cstdlib> as well as <stdlib.h> so
245 that it is processed before we poison "malloc"; otherwise, if a source
246 file uses a standard library header that includes <cstdlib>, we will get
247 an error about 'using std::malloc'. */
248 #ifdef __cplusplus
249 #include <cstdlib>
250 #endif
252 /* Undef vec_free from AIX stdlib.h header which conflicts with vec.h. */
253 #undef vec_free
255 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
256 FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
257 or 0 and 1 if those macros are not defined. */
258 #ifndef SUCCESS_EXIT_CODE
259 # ifdef EXIT_SUCCESS
260 # define SUCCESS_EXIT_CODE EXIT_SUCCESS
261 # else
262 # define SUCCESS_EXIT_CODE 0
263 # endif
264 #endif
266 #ifndef FATAL_EXIT_CODE
267 # ifdef EXIT_FAILURE
268 # define FATAL_EXIT_CODE EXIT_FAILURE
269 # else
270 # define FATAL_EXIT_CODE 1
271 # endif
272 #endif
274 #define ICE_EXIT_CODE 4
276 #ifdef HAVE_UNISTD_H
277 # include <unistd.h>
278 #endif
280 #ifdef HAVE_SYS_PARAM_H
281 # include <sys/param.h>
282 /* We use these identifiers later and they appear in some vendor param.h's. */
283 # undef PREFETCH
284 # undef m_slot
285 #endif
287 #if HAVE_LIMITS_H
288 # include <limits.h>
289 #endif
291 /* A macro to determine whether a VALUE lies inclusively within a
292 certain range without evaluating the VALUE more than once. This
293 macro won't warn if the VALUE is unsigned and the LOWER bound is
294 zero, as it would e.g. with "VALUE >= 0 && ...". Note the LOWER
295 bound *is* evaluated twice, and LOWER must not be greater than
296 UPPER. However the bounds themselves can be either positive or
297 negative. */
298 #define IN_RANGE(VALUE, LOWER, UPPER) \
299 ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
300 <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
302 /* Infrastructure for defining missing _MAX and _MIN macros. Note that
303 macros defined with these cannot be used in #if. */
305 /* The extra casts work around common compiler bugs. */
306 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
307 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
308 It is necessary at least when t == time_t. */
309 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
310 ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
311 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
313 /* Use that infrastructure to provide a few constants. */
314 #ifndef UCHAR_MAX
315 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
316 #endif
318 #ifdef TIME_WITH_SYS_TIME
319 # include <sys/time.h>
320 # include <time.h>
321 #else
322 # if HAVE_SYS_TIME_H
323 # include <sys/time.h>
324 # else
325 # ifdef HAVE_TIME_H
326 # include <time.h>
327 # endif
328 # endif
329 #endif
331 #ifdef HAVE_FCNTL_H
332 # include <fcntl.h>
333 #else
334 # ifdef HAVE_SYS_FILE_H
335 # include <sys/file.h>
336 # endif
337 #endif
339 #ifndef SEEK_SET
340 # define SEEK_SET 0
341 # define SEEK_CUR 1
342 # define SEEK_END 2
343 #endif
344 #ifndef F_OK
345 # define F_OK 0
346 # define X_OK 1
347 # define W_OK 2
348 # define R_OK 4
349 #endif
350 #ifndef O_RDONLY
351 # define O_RDONLY 0
352 #endif
353 #ifndef O_WRONLY
354 # define O_WRONLY 1
355 #endif
356 #ifndef O_BINARY
357 # define O_BINARY 0
358 #endif
360 /* Some systems define these in, e.g., param.h. We undefine these names
361 here to avoid the warnings. We prefer to use our definitions since we
362 know they are correct. */
364 #undef MIN
365 #undef MAX
366 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
367 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
369 /* Returns the least number N such that N * Y >= X. */
370 #define CEIL(x,y) (((x) + (y) - 1) / (y))
372 #ifdef HAVE_SYS_WAIT_H
373 #include <sys/wait.h>
374 #endif
376 #ifndef WIFSIGNALED
377 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
378 #endif
379 #ifndef WTERMSIG
380 #define WTERMSIG(S) ((S) & 0x7f)
381 #endif
382 #ifndef WIFEXITED
383 #define WIFEXITED(S) (((S) & 0xff) == 0)
384 #endif
385 #ifndef WEXITSTATUS
386 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
387 #endif
388 #ifndef WSTOPSIG
389 #define WSTOPSIG WEXITSTATUS
390 #endif
391 #ifndef WCOREDUMP
392 #define WCOREDUMP(S) ((S) & WCOREFLG)
393 #endif
394 #ifndef WCOREFLG
395 #define WCOREFLG 0200
396 #endif
398 #include <signal.h>
399 #if !defined (SIGCHLD) && defined (SIGCLD)
400 # define SIGCHLD SIGCLD
401 #endif
403 #ifdef HAVE_SYS_MMAN_H
404 # include <sys/mman.h>
405 #endif
407 #ifndef MAP_FAILED
408 # define MAP_FAILED ((void *)-1)
409 #endif
411 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
412 # define MAP_ANONYMOUS MAP_ANON
413 #endif
415 #ifdef HAVE_SYS_RESOURCE_H
416 # include <sys/resource.h>
417 #endif
419 #ifdef HAVE_SYS_TIMES_H
420 # include <sys/times.h>
421 #endif
423 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1. If they
424 are defined to 0 then we must provide the relevant declaration
425 here. These checks will be in the undefined state while configure
426 is running so be careful to test "defined (HAVE_DECL_*)". */
428 #ifdef __cplusplus
429 extern "C" {
430 #endif
432 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
433 extern double atof (const char *);
434 #endif
436 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
437 extern long atol (const char *);
438 #endif
440 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
441 extern void free (void *);
442 #endif
444 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
445 extern char *getcwd (char *, size_t);
446 #endif
448 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
449 extern char *getenv (const char *);
450 #endif
452 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
453 extern int getopt (int, char * const *, const char *);
454 #endif
456 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
457 extern int getpagesize (void);
458 #endif
460 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
461 extern char *getwd (char *);
462 #endif
464 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
465 extern void *sbrk (int);
466 #endif
468 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
469 extern char *strstr (const char *, const char *);
470 #endif
472 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
473 extern char *stpcpy (char *, const char *);
474 #endif
476 #ifdef __cplusplus
478 #endif
480 #ifdef HAVE_MALLOC_H
481 #include <malloc.h>
482 #endif
484 #ifdef __cplusplus
485 extern "C" {
486 #endif
488 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
489 extern void *malloc (size_t);
490 #endif
492 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
493 extern void *calloc (size_t, size_t);
494 #endif
496 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
497 extern void *realloc (void *, size_t);
498 #endif
500 #ifdef __cplusplus
502 #endif
504 #ifdef HAVE_STDINT_H
505 #include <stdint.h>
506 #endif
508 #ifdef HAVE_INTTYPES_H
509 #include <inttypes.h>
510 #endif
512 #ifdef __cplusplus
513 extern "C" {
514 #endif
516 /* If the system doesn't provide strsignal, we get it defined in
517 libiberty but no declaration is supplied. */
518 #if !defined (HAVE_STRSIGNAL) \
519 || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
520 # ifndef strsignal
521 extern const char *strsignal (int);
522 # endif
523 #endif
525 #ifdef HAVE_GETRLIMIT
526 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
527 # ifndef getrlimit
528 struct rlimit;
529 extern int getrlimit (int, struct rlimit *);
530 # endif
531 # endif
532 #endif
534 #ifdef HAVE_SETRLIMIT
535 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
536 # ifndef setrlimit
537 struct rlimit;
538 extern int setrlimit (int, const struct rlimit *);
539 # endif
540 # endif
541 #endif
543 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
544 extern void abort (void);
545 #endif
547 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
548 extern int snprintf (char *, size_t, const char *, ...);
549 #endif
551 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
552 extern int vsnprintf (char *, size_t, const char *, va_list);
553 #endif
555 #ifdef __cplusplus
557 #endif
559 /* 1 if we have C99 designated initializers. */
560 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
561 #define HAVE_DESIGNATED_INITIALIZERS \
562 (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
563 && !defined(__cplusplus))
564 #endif
566 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
567 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
568 (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
569 && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
570 #endif
572 #if HAVE_SYS_STAT_H
573 # include <sys/stat.h>
574 #endif
576 /* Test if something is a normal file. */
577 #ifndef S_ISREG
578 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
579 #endif
581 /* Test if something is a directory. */
582 #ifndef S_ISDIR
583 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
584 #endif
586 /* Test if something is a character special file. */
587 #ifndef S_ISCHR
588 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
589 #endif
591 /* Test if something is a block special file. */
592 #ifndef S_ISBLK
593 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
594 #endif
596 /* Test if something is a socket. */
597 #ifndef S_ISSOCK
598 # ifdef S_IFSOCK
599 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
600 # else
601 # define S_ISSOCK(m) 0
602 # endif
603 #endif
605 /* Test if something is a FIFO. */
606 #ifndef S_ISFIFO
607 # ifdef S_IFIFO
608 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
609 # else
610 # define S_ISFIFO(m) 0
611 # endif
612 #endif
614 /* Define well known filenos if the system does not define them. */
615 #ifndef STDIN_FILENO
616 # define STDIN_FILENO 0
617 #endif
618 #ifndef STDOUT_FILENO
619 # define STDOUT_FILENO 1
620 #endif
621 #ifndef STDERR_FILENO
622 # define STDERR_FILENO 2
623 #endif
625 /* Some systems have mkdir that takes a single argument. */
626 #ifdef MKDIR_TAKES_ONE_ARG
627 # define mkdir(a,b) mkdir (a)
628 #endif
630 #ifndef HAVE_KILL
631 # define kill(p,s) raise (s)
632 #endif
634 /* Provide a way to print an address via printf. */
635 #ifndef HOST_PTR_PRINTF
636 #define HOST_PTR_PRINTF "%p"
637 #endif /* ! HOST_PTR_PRINTF */
639 /* By default, colon separates directories in a path. */
640 #ifndef PATH_SEPARATOR
641 #define PATH_SEPARATOR ':'
642 #endif
644 /* Filename handling macros. */
645 #include "filenames.h"
647 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible. */
648 #ifndef DIR_SEPARATOR
649 # define DIR_SEPARATOR '/'
650 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
651 # define DIR_SEPARATOR_2 '\\'
652 # endif
653 #endif
655 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
656 /* If plugin support is enabled, we could use libdl. */
657 #include <dlfcn.h>
658 #endif
660 /* Do not introduce a gmp.h dependency on the build system. */
661 #ifndef GENERATOR_FILE
662 #include <gmp.h>
663 #endif
665 /* Get libiberty declarations. */
666 #include "libiberty.h"
668 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
669 #undef FLOAT /* Likewise. */
670 #undef ABS /* Likewise. */
671 #undef PC /* Likewise. */
673 /* Provide a default for the HOST_BIT_BUCKET.
674 This suffices for POSIX-like hosts. */
676 #ifndef HOST_BIT_BUCKET
677 #define HOST_BIT_BUCKET "/dev/null"
678 #endif
680 #ifndef offsetof
681 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
682 #endif
684 /* Various error reporting routines want to use __FUNCTION__. */
685 #if (GCC_VERSION < 2007)
686 #ifndef __FUNCTION__
687 #define __FUNCTION__ "?"
688 #endif /* ! __FUNCTION__ */
689 #endif
691 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
692 the most likely value of A is B. This feature was added at some point
693 between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */
694 #if (GCC_VERSION < 3000)
695 #define __builtin_expect(a, b) (a)
696 #endif
698 /* Redefine abort to report an internal error w/o coredump, and
699 reporting the location of the error in the source file. */
700 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
701 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
703 /* Use gcc_assert(EXPR) to test invariants. */
704 #if ENABLE_ASSERT_CHECKING
705 #define gcc_assert(EXPR) \
706 ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
707 #elif (GCC_VERSION >= 4005)
708 #define gcc_assert(EXPR) \
709 ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
710 #else
711 /* Include EXPR, so that unused variable warnings do not occur. */
712 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
713 #endif
715 #ifdef ENABLE_CHECKING
716 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
717 #else
718 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
719 #endif
721 /* Use gcc_unreachable() to mark unreachable locations (like an
722 unreachable default case of a switch. Do not use gcc_assert(0). */
723 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
724 #define gcc_unreachable() __builtin_unreachable ()
725 #else
726 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
727 #endif
729 #if GCC_VERSION >= 3001
730 #define STATIC_CONSTANT_P(X) (__builtin_constant_p (X) && (X))
731 #else
732 #define STATIC_CONSTANT_P(X) (false && (X))
733 #endif
735 /* Until we can use C++11's static_assert. */
736 #define STATIC_ASSERT(X) \
737 typedef int assertion1[(X) ? 1 : -1] ATTRIBUTE_UNUSED
739 /* Provide a fake boolean type. We make no attempt to use the
740 C99 _Bool, as it may not be available in the bootstrap compiler,
741 and even if it is, it is liable to be buggy.
742 This must be after all inclusion of system headers, as some of
743 them will mess us up. */
745 #undef TRUE
746 #undef FALSE
748 #ifdef __cplusplus
749 /* Obsolete. */
750 # define TRUE true
751 # define FALSE false
752 #else /* !__cplusplus */
753 # undef bool
754 # undef true
755 # undef false
757 # define bool unsigned char
758 # define true 1
759 # define false 0
761 /* Obsolete. */
762 # define TRUE true
763 # define FALSE false
764 #endif /* !__cplusplus */
766 /* Some compilers do not allow the use of unsigned char in bitfields. */
767 #define BOOL_BITFIELD unsigned int
769 /* As the last action in this file, we poison the identifiers that
770 shouldn't be used. Note, luckily gcc-3.0's token-based integrated
771 preprocessor won't trip on poisoned identifiers that arrive from
772 the expansion of macros. E.g. #define strrchr rindex, won't error
773 if rindex is poisoned after this directive is issued and later on
774 strrchr is called.
776 Note: We define bypass macros for the few cases where we really
777 want to use the libc memory allocation routines. Otherwise we
778 insist you use the "x" versions from libiberty. */
780 #define really_call_malloc malloc
781 #define really_call_calloc calloc
782 #define really_call_realloc realloc
784 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
785 /* Flex and bison use malloc and realloc. Yuk. Note that this means
786 really_call_* cannot be used in a .l or .y file. */
787 #define malloc xmalloc
788 #define realloc xrealloc
789 #endif
791 #if (GCC_VERSION >= 3000)
793 /* Note autoconf checks for prototype declarations and includes
794 system.h while doing so. Only poison these tokens if actually
795 compiling gcc, so that the autoconf declaration tests for malloc
796 etc don't spuriously fail. */
797 #ifdef IN_GCC
798 #undef calloc
799 #undef strdup
800 #pragma GCC poison calloc strdup
802 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
803 #undef malloc
804 #undef realloc
805 #pragma GCC poison malloc realloc
806 #endif
808 /* The %m format should be used when GCC's main diagnostic functions
809 supporting %m are available, and xstrerror from libiberty
810 otherwise. */
811 #undef strerror
812 #pragma GCC poison strerror
814 /* loc_t is defined on some systems and too inviting for some
815 programmers to avoid. */
816 #undef loc_t
817 #pragma GCC poison loc_t
819 /* Old target macros that have moved to the target hooks structure. */
820 #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN \
821 FUNCTION_PROLOGUE FUNCTION_EPILOGUE \
822 FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE \
823 DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES \
824 VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE \
825 SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES \
826 MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES \
827 MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR \
828 ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE \
829 WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
830 ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL \
831 ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS \
832 ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
833 ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
834 INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
835 DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL \
836 MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
837 PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM \
838 ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
839 STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING \
840 PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM \
841 SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS \
842 DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS \
843 HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX \
844 MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE \
845 VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN \
846 FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL \
847 ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
848 CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE \
849 TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING \
850 RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS \
851 OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P \
852 USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO \
853 LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP \
854 LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP \
855 CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
856 HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
857 OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
858 ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK LIBGCC2_HAS_SF_MODE \
859 LIBGCC2_HAS_DF_MODE LIBGCC2_HAS_XF_MODE LIBGCC2_HAS_TF_MODE \
860 CLEAR_BY_PIECES_P MOVE_BY_PIECES_P SET_BY_PIECES_P \
861 STORE_BY_PIECES_P
863 /* Target macros only used for code built for the target, that have
864 moved to libgcc-tm.h or have never been present elsewhere. */
865 #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX \
866 MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK \
867 REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
869 /* Other obsolete target macros, or macros that used to be in target
870 headers and were not used, and may be obsolete or may never have
871 been used. */
872 #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES \
873 ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK \
874 DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
875 OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR \
876 LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC \
877 STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE \
878 SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH \
879 TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE \
880 NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
881 BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER \
882 FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE \
883 MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER \
884 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN \
885 OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE \
886 ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT \
887 DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME \
888 DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE \
889 INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT \
890 EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER \
891 LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES \
892 LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE \
893 CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME \
894 FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP \
895 PROMOTED_MODE EXPAND_BUILTIN_VA_END \
896 LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE \
897 GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE \
898 MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD \
899 FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE \
900 TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE \
901 DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE \
902 SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY \
903 SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE \
904 DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG \
905 COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB \
906 ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER \
907 GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER \
908 PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END \
909 DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE \
910 NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE \
911 CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0 \
912 TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT \
913 LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE \
914 TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC \
915 PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP \
916 EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION \
917 TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION \
918 SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON \
919 ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE \
920 STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD \
921 ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE \
922 ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES \
923 SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
924 TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP \
925 HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE \
926 FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST \
927 USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE \
928 FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION \
929 MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS \
930 SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES \
931 PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR \
932 STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT \
933 LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO \
934 IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC \
935 DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT \
936 REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P \
937 TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS \
938 IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP \
939 UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP \
940 USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
941 CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC \
942 GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE \
943 ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS \
944 REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
945 CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT \
946 REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT \
947 EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT \
948 EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P \
949 CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL \
950 ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
951 LIBGCC2_LONG_DOUBLE_TYPE_SIZE
953 /* Hooks that are no longer used. */
954 #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE \
955 LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
956 LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
957 LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
958 LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
959 LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
960 TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
961 LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
962 TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
963 TARGET_IRA_COVER_CLASSES TARGET_HELP \
964 TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
965 TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
966 TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
967 TARGET_MD_ASM_CLOBBERS TARGET_RELAXED_ORDERING
969 /* Arrays that were deleted in favor of a functional interface. */
970 #pragma GCC poison built_in_decls implicit_built_in_decls
972 /* Hooks into libgcc2. */
973 #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
974 LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
976 /* Miscellaneous macros that are no longer used. */
977 #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
979 /* Libiberty macros that are no longer used in GCC. */
980 #undef ANSI_PROTOTYPES
981 #undef PTR_CONST
982 #undef LONG_DOUBLE
983 #undef VPARAMS
984 #undef VA_OPEN
985 #undef VA_FIXEDARG
986 #undef VA_CLOSE
987 #undef VA_START
988 #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
989 VA_FIXEDARG VA_CLOSE VA_START
990 #endif /* IN_GCC */
992 /* Front ends should never have to include middle-end headers. Enforce
993 this by poisoning the header double-include protection defines. */
994 #ifdef IN_GCC_FRONTEND
995 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
996 #endif
998 /* Note: not all uses of the `index' token (e.g. variable names and
999 structure members) have been eliminated. */
1000 #undef bcopy
1001 #undef bzero
1002 #undef bcmp
1003 #undef rindex
1004 #pragma GCC poison bcopy bzero bcmp rindex
1006 #endif /* GCC >= 3.0 */
1008 /* This macro allows casting away const-ness to pass -Wcast-qual
1009 warnings. DO NOT USE THIS UNLESS YOU REALLY HAVE TO! It should
1010 only be used in certain specific cases. One valid case is where
1011 the C standard definitions or prototypes force you to. E.g. if you
1012 need to free a const object, or if you pass a const string to
1013 execv, et al. Another valid use would be in an allocation function
1014 that creates const objects that need to be initialized. In some
1015 cases we have non-const functions that return the argument
1016 (e.g. next_nonnote_insn). Rather than create const shadow
1017 functions, we can cast away const-ness in calling these interfaces
1018 if we're careful to verify that the called function does indeed not
1019 modify its argument and the return value is only used in a const
1020 context. (This can be somewhat dangerous as these assumptions can
1021 change after the fact). Beyond these uses, most other cases of
1022 using this macro should be viewed with extreme caution. */
1024 #ifdef __cplusplus
1025 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
1026 #else
1027 #if defined(__GNUC__) && GCC_VERSION > 4000
1028 /* GCC 4.0.x has a bug where it may ICE on this expression,
1029 so does GCC 3.4.x (PR17436). */
1030 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
1031 #elif defined(__GNUC__)
1032 static inline char *
1033 helper_const_non_const_cast (const char *p)
1035 union {
1036 const char *const_c;
1037 char *c;
1038 } val;
1039 val.const_c = p;
1040 return val.c;
1043 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1044 ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1045 #else
1046 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1047 #endif
1048 #endif
1049 #define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1050 #define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1051 #define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1052 #define CONST_CAST_RTX_INSN(X) CONST_CAST (struct rtx_insn *, (X))
1053 #define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1054 #define CONST_CAST_GIMPLE(X) CONST_CAST (struct gimple_statement_base *, (X))
1056 /* Activate certain diagnostics as warnings (not errors via the
1057 -Werror flag). */
1058 #if GCC_VERSION >= 4003
1059 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1060 an error/-Werror). */
1061 #ifndef ENABLE_ASSERT_CHECKING
1062 #pragma GCC diagnostic warning "-Wuninitialized"
1063 #endif
1064 #endif
1066 #ifdef ENABLE_VALGRIND_ANNOTATIONS
1067 # ifdef HAVE_VALGRIND_MEMCHECK_H
1068 # include <valgrind/memcheck.h>
1069 # elif defined HAVE_MEMCHECK_H
1070 # include <memcheck.h>
1071 # else
1072 # include <valgrind.h>
1073 # endif
1074 /* Compatibility macros to let valgrind 3.1 work. */
1075 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1076 # define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1077 # endif
1078 # ifndef VALGRIND_MAKE_MEM_DEFINED
1079 # define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1080 # endif
1081 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1082 # define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1083 # endif
1084 #else
1085 /* Avoid #ifdef:s when we can help it. */
1086 #define VALGRIND_DISCARD(x)
1087 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1088 #define VALGRIND_FREELIKE_BLOCK(x,y)
1089 #endif
1091 /* In LTO -fwhole-program build we still want to keep the debug functions available
1092 for debugger. Mark them as used to prevent removal. */
1093 #if (GCC_VERSION > 4000)
1094 #define DEBUG_FUNCTION __attribute__ ((__used__))
1095 #define DEBUG_VARIABLE __attribute__ ((__used__))
1096 #else
1097 #define DEBUG_FUNCTION
1098 #define DEBUG_VARIABLE
1099 #endif
1101 /* General macro to extract bit Y of X. */
1102 #define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
1104 /* Get definitions of HOST_WIDE_INT. */
1105 #include "hwint.h"
1107 #endif /* ! GCC_SYSTEM_H */