1 /* Get common system includes and various definitions and declarations based
2 on autoconf macros.
3 Copyright (C) 1998-2016 Free Software Foundation, Inc.
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
10 version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
20
21
22 #ifndef GCC_SYSTEM_H
23 #define GCC_SYSTEM_H
24
25 /* 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
30
31 /* We must include stdarg.h before stdio.h. */
32 #include <stdarg.h>
33
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
41
42 #ifdef HAVE_STDDEF_H
43 # include <stddef.h>
44 #endif
45
46 #include <stdio.h>
47
48 /* Define a generic NULL if one hasn't already been defined. */
49 #ifndef NULL
50 #define NULL 0
51 #endif
52
53 /* Use the unlocked open routines from libiberty. */
54
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. */
58
59 #undef fopen
60 #undef freopen
61
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)
65
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).
70
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.
74
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). */
78
79 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
80
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
101
102 #ifdef __cplusplus
103 extern "C" {
104 #endif
105
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
185
186 #ifdef __cplusplus
187 }
188 #endif
189
190 #endif
191
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
196
197 /* Include <string> before "safe-ctype.h" to avoid GCC poisoning
198 the ctype macros through safe-ctype.h */
199
200 #ifdef __cplusplus
201 #ifdef INCLUDE_STRING
202 # include <string>
203 #endif
204 #endif
205
206 /* There are an extraordinary number of issues with <ctype.h>.
207 The last straw is that it varies with the locale. Use libiberty's
208 replacement instead. */
209 #include "safe-ctype.h"
210
211 #include <sys/types.h>
212
213 #include <errno.h>
214
215 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
216 extern int errno;
217 #endif
218
219 #ifdef __cplusplus
220 #if defined (INCLUDE_ALGORITHM) || !defined (HAVE_SWAP_IN_UTILITY)
221 # include <algorithm>
222 #endif
223 #ifdef INCLUDE_LIST
224 # include <list>
225 #endif
226 #ifdef INCLUDE_MAP
227 # include <map>
228 #endif
229 #ifdef INCLUDE_SET
230 # include <set>
231 #endif
232 #ifdef INCLUDE_VECTOR
233 # include <vector>
234 #endif
235 # include <cstring>
236 # include <new>
237 # include <utility>
238 #endif
239
240 /* Some of glibc's string inlines cause warnings. Plus we'd rather
241 rely on (and therefore test) GCC's string builtins. */
242 #define __NO_STRING_INLINES
243
244 #ifdef STRING_WITH_STRINGS
245 # include <string.h>
246 # include <strings.h>
247 #else
248 # ifdef HAVE_STRING_H
249 # include <string.h>
250 # else
251 # ifdef HAVE_STRINGS_H
252 # include <strings.h>
253 # endif
254 # endif
255 #endif
256
257 #ifdef HAVE_STDLIB_H
258 # include <stdlib.h>
259 #endif
260
261 /* When compiling C++ we need to include <cstdlib> as well as <stdlib.h> so
262 that it is processed before we poison "malloc"; otherwise, if a source
263 file uses a standard library header that includes <cstdlib>, we will get
264 an error about 'using std::malloc'. */
265 #ifdef __cplusplus
266 #include <cstdlib>
267 #endif
268
269 /* Undef vec_free from AIX stdlib.h header which conflicts with vec.h. */
270 #undef vec_free
271
272 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
273 FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
274 or 0 and 1 if those macros are not defined. */
275 #ifndef SUCCESS_EXIT_CODE
276 # ifdef EXIT_SUCCESS
277 # define SUCCESS_EXIT_CODE EXIT_SUCCESS
278 # else
279 # define SUCCESS_EXIT_CODE 0
280 # endif
281 #endif
282
283 #ifndef FATAL_EXIT_CODE
284 # ifdef EXIT_FAILURE
285 # define FATAL_EXIT_CODE EXIT_FAILURE
286 # else
287 # define FATAL_EXIT_CODE 1
288 # endif
289 #endif
290
291 #define ICE_EXIT_CODE 4
292
293 #ifdef HAVE_UNISTD_H
294 # include <unistd.h>
295 #endif
296
297 #ifdef HAVE_SYS_PARAM_H
298 # include <sys/param.h>
299 /* We use these identifiers later and they appear in some vendor param.h's. */
300 # undef PREFETCH
301 # undef m_slot
302 #endif
303
304 #if HAVE_LIMITS_H
305 # include <limits.h>
306 #endif
307
308 /* A macro to determine whether a VALUE lies inclusively within a
309 certain range without evaluating the VALUE more than once. This
310 macro won't warn if the VALUE is unsigned and the LOWER bound is
311 zero, as it would e.g. with "VALUE >= 0 && ...". Note the LOWER
312 bound *is* evaluated twice, and LOWER must not be greater than
313 UPPER. However the bounds themselves can be either positive or
314 negative. */
315 #define IN_RANGE(VALUE, LOWER, UPPER) \
316 ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \
317 <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER))
318
319 /* Infrastructure for defining missing _MAX and _MIN macros. Note that
320 macros defined with these cannot be used in #if. */
321
322 /* The extra casts work around common compiler bugs. */
323 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
324 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
325 It is necessary at least when t == time_t. */
326 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
327 ? (t) 1 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
328 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
329
330 /* Use that infrastructure to provide a few constants. */
331 #ifndef UCHAR_MAX
332 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
333 #endif
334
335 #ifdef TIME_WITH_SYS_TIME
336 # include <sys/time.h>
337 # include <time.h>
338 #else
339 # if HAVE_SYS_TIME_H
340 # include <sys/time.h>
341 # else
342 # ifdef HAVE_TIME_H
343 # include <time.h>
344 # endif
345 # endif
346 #endif
347
348 #ifdef HAVE_FCNTL_H
349 # include <fcntl.h>
350 #else
351 # ifdef HAVE_SYS_FILE_H
352 # include <sys/file.h>
353 # endif
354 #endif
355
356 #ifndef SEEK_SET
357 # define SEEK_SET 0
358 # define SEEK_CUR 1
359 # define SEEK_END 2
360 #endif
361 #ifndef F_OK
362 # define F_OK 0
363 # define X_OK 1
364 # define W_OK 2
365 # define R_OK 4
366 #endif
367 #ifndef O_RDONLY
368 # define O_RDONLY 0
369 #endif
370 #ifndef O_WRONLY
371 # define O_WRONLY 1
372 #endif
373 #ifndef O_BINARY
374 # define O_BINARY 0
375 #endif
376
377 /* Some systems define these in, e.g., param.h. We undefine these names
378 here to avoid the warnings. We prefer to use our definitions since we
379 know they are correct. */
380
381 #undef MIN
382 #undef MAX
383 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
384 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
385
386 /* Returns the least number N such that N * Y >= X. */
387 #define CEIL(x,y) (((x) + (y) - 1) / (y))
388
389 /* This macro rounds x up to the y boundary. */
390 #define ROUND_UP(x,y) (((x) + (y) - 1) & ~((y) - 1))
391
392 /* This macro rounds x down to the y boundary. */
393 #define ROUND_DOWN(x,y) ((x) & ~((y) - 1))
394
395 #ifdef HAVE_SYS_WAIT_H
396 #include <sys/wait.h>
397 #endif
398
399 #ifndef WIFSIGNALED
400 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
401 #endif
402 #ifndef WTERMSIG
403 #define WTERMSIG(S) ((S) & 0x7f)
404 #endif
405 #ifndef WIFEXITED
406 #define WIFEXITED(S) (((S) & 0xff) == 0)
407 #endif
408 #ifndef WEXITSTATUS
409 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
410 #endif
411 #ifndef WSTOPSIG
412 #define WSTOPSIG WEXITSTATUS
413 #endif
414 #ifndef WCOREDUMP
415 #define WCOREDUMP(S) ((S) & WCOREFLG)
416 #endif
417 #ifndef WCOREFLG
418 #define WCOREFLG 0200
419 #endif
420
421 #include <signal.h>
422 #if !defined (SIGCHLD) && defined (SIGCLD)
423 # define SIGCHLD SIGCLD
424 #endif
425
426 #ifdef HAVE_SYS_MMAN_H
427 # include <sys/mman.h>
428 #endif
429
430 #ifndef MAP_FAILED
431 # define MAP_FAILED ((void *)-1)
432 #endif
433
434 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
435 # define MAP_ANONYMOUS MAP_ANON
436 #endif
437
438 #ifdef HAVE_SYS_RESOURCE_H
439 # include <sys/resource.h>
440 #endif
441
442 #ifdef HAVE_SYS_TIMES_H
443 # include <sys/times.h>
444 #endif
445
446 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1. If they
447 are defined to 0 then we must provide the relevant declaration
448 here. These checks will be in the undefined state while configure
449 is running so be careful to test "defined (HAVE_DECL_*)". */
450
451 #ifdef __cplusplus
452 extern "C" {
453 #endif
454
455 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
456 extern double atof (const char *);
457 #endif
458
459 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
460 extern long atol (const char *);
461 #endif
462
463 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
464 extern void free (void *);
465 #endif
466
467 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
468 extern char *getcwd (char *, size_t);
469 #endif
470
471 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
472 extern char *getenv (const char *);
473 #endif
474
475 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
476 extern int getopt (int, char * const *, const char *);
477 #endif
478
479 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
480 extern int getpagesize (void);
481 #endif
482
483 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
484 extern char *getwd (char *);
485 #endif
486
487 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
488 extern void *sbrk (int);
489 #endif
490
491 #if defined (HAVE_DECL_SETENV) && !HAVE_DECL_SETENV
492 int setenv(const char *, const char *, int);
493 #endif
494
495 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
496 extern char *strstr (const char *, const char *);
497 #endif
498
499 #if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
500 extern char *stpcpy (char *, const char *);
501 #endif
502
503 #if defined (HAVE_DECL_UNSETENV) && !HAVE_DECL_UNSETENV
504 int unsetenv(const char *);
505 #endif
506
507 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
508 extern void *malloc (size_t);
509 #endif
510
511 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
512 extern void *calloc (size_t, size_t);
513 #endif
514
515 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
516 extern void *realloc (void *, size_t);
517 #endif
518
519 #ifdef __cplusplus
520 }
521 #endif
522
523 #ifdef HAVE_STDINT_H
524 #include <stdint.h>
525 #endif
526
527 #ifdef HAVE_INTTYPES_H
528 #include <inttypes.h>
529 #endif
530
531 #ifdef __cplusplus
532 extern "C" {
533 #endif
534
535 /* If the system doesn't provide strsignal, we get it defined in
536 libiberty but no declaration is supplied. */
537 #if !defined (HAVE_STRSIGNAL) \
538 || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL)
539 # ifndef strsignal
540 extern const char *strsignal (int);
541 # endif
542 #endif
543
544 #ifdef HAVE_GETRLIMIT
545 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
546 # ifndef getrlimit
547 struct rlimit;
548 extern int getrlimit (int, struct rlimit *);
549 # endif
550 # endif
551 #endif
552
553 #ifdef HAVE_SETRLIMIT
554 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
555 # ifndef setrlimit
556 struct rlimit;
557 extern int setrlimit (int, const struct rlimit *);
558 # endif
559 # endif
560 #endif
561
562 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
563 extern void abort (void);
564 #endif
565
566 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
567 extern int snprintf (char *, size_t, const char *, ...);
568 #endif
569
570 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
571 extern int vsnprintf (char *, size_t, const char *, va_list);
572 #endif
573
574 #ifdef __cplusplus
575 }
576 #endif
577
578 /* 1 if we have C99 designated initializers. */
579 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
580 #define HAVE_DESIGNATED_INITIALIZERS \
581 (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
582 && !defined(__cplusplus))
583 #endif
584
585 #if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
586 #define HAVE_DESIGNATED_UNION_INITIALIZERS \
587 (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \
588 && (!defined(__cplusplus) || (GCC_VERSION >= 4007)))
589 #endif
590
591 #if HAVE_SYS_STAT_H
592 # include <sys/stat.h>
593 #endif
594
595 /* Test if something is a normal file. */
596 #ifndef S_ISREG
597 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
598 #endif
599
600 /* Test if something is a directory. */
601 #ifndef S_ISDIR
602 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
603 #endif
604
605 /* Test if something is a character special file. */
606 #ifndef S_ISCHR
607 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
608 #endif
609
610 /* Test if something is a block special file. */
611 #ifndef S_ISBLK
612 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
613 #endif
614
615 /* Test if something is a socket. */
616 #ifndef S_ISSOCK
617 # ifdef S_IFSOCK
618 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
619 # else
620 # define S_ISSOCK(m) 0
621 # endif
622 #endif
623
624 /* Test if something is a FIFO. */
625 #ifndef S_ISFIFO
626 # ifdef S_IFIFO
627 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
628 # else
629 # define S_ISFIFO(m) 0
630 # endif
631 #endif
632
633 /* Define well known filenos if the system does not define them. */
634 #ifndef STDIN_FILENO
635 # define STDIN_FILENO 0
636 #endif
637 #ifndef STDOUT_FILENO
638 # define STDOUT_FILENO 1
639 #endif
640 #ifndef STDERR_FILENO
641 # define STDERR_FILENO 2
642 #endif
643
644 /* Some systems have mkdir that takes a single argument. */
645 #ifdef MKDIR_TAKES_ONE_ARG
646 # define mkdir(a,b) mkdir (a)
647 #endif
648
649 #ifndef HAVE_KILL
650 # define kill(p,s) raise (s)
651 #endif
652
653 /* Provide a way to print an address via printf. */
654 #ifndef HOST_PTR_PRINTF
655 #define HOST_PTR_PRINTF "%p"
656 #endif /* ! HOST_PTR_PRINTF */
657
658 /* By default, colon separates directories in a path. */
659 #ifndef PATH_SEPARATOR
660 #define PATH_SEPARATOR ':'
661 #endif
662
663 /* Filename handling macros. */
664 #include "filenames.h"
665
666 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible. */
667 #ifndef DIR_SEPARATOR
668 # define DIR_SEPARATOR '/'
669 # ifdef HAVE_DOS_BASED_FILE_SYSTEM
670 # define DIR_SEPARATOR_2 '\\'
671 # endif
672 #endif
673
674 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
675 /* If plugin support is enabled, we could use libdl. */
676 #include <dlfcn.h>
677 #endif
678
679 /* Do not introduce a gmp.h dependency on the build system. */
680 #ifndef GENERATOR_FILE
681 #include <gmp.h>
682 #endif
683
684 /* Get libiberty declarations. */
685 #include "libiberty.h"
686
687 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
688 #undef FLOAT /* Likewise. */
689 #undef ABS /* Likewise. */
690 #undef PC /* Likewise. */
691
692 /* Provide a default for the HOST_BIT_BUCKET.
693 This suffices for POSIX-like hosts. */
694
695 #ifndef HOST_BIT_BUCKET
696 #define HOST_BIT_BUCKET "/dev/null"
697 #endif
698
699 #ifndef offsetof
700 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
701 #endif
702
703 /* Various error reporting routines want to use __FUNCTION__. */
704 #if (GCC_VERSION < 2007)
705 #ifndef __FUNCTION__
706 #define __FUNCTION__ "?"
707 #endif /* ! __FUNCTION__ */
708 #endif
709
710 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
711 the most likely value of A is B. This feature was added at some point
712 between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */
713 #if (GCC_VERSION < 3000)
714 #define __builtin_expect(a, b) (a)
715 #endif
716
717 /* Redefine abort to report an internal error w/o coredump, and
718 reporting the location of the error in the source file. */
719 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
720 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
721
722 /* Use gcc_assert(EXPR) to test invariants. */
723 #if ENABLE_ASSERT_CHECKING
724 #define gcc_assert(EXPR) \
725 ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
726 #elif (GCC_VERSION >= 4005)
727 #define gcc_assert(EXPR) \
728 ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
729 #else
730 /* Include EXPR, so that unused variable warnings do not occur. */
731 #define gcc_assert(EXPR) ((void)(0 && (EXPR)))
732 #endif
733
734 #if CHECKING_P
735 #define gcc_checking_assert(EXPR) gcc_assert (EXPR)
736 #else
737 /* N.B.: in release build EXPR is not evaluated. */
738 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
739 #endif
740
741 /* Use gcc_unreachable() to mark unreachable locations (like an
742 unreachable default case of a switch. Do not use gcc_assert(0). */
743 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
744 #define gcc_unreachable() __builtin_unreachable ()
745 #else
746 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
747 #endif
748
749 #if GCC_VERSION >= 3001
750 #define STATIC_CONSTANT_P(X) (__builtin_constant_p (X) && (X))
751 #else
752 #define STATIC_CONSTANT_P(X) (false && (X))
753 #endif
754
755 /* Until we can use C++11's static_assert. */
756 #define STATIC_ASSERT(X) \
757 typedef int assertion1[(X) ? 1 : -1] ATTRIBUTE_UNUSED
758
759 /* Provide a fake boolean type. We make no attempt to use the
760 C99 _Bool, as it may not be available in the bootstrap compiler,
761 and even if it is, it is liable to be buggy.
762 This must be after all inclusion of system headers, as some of
763 them will mess us up. */
764
765 #undef TRUE
766 #undef FALSE
767
768 #ifdef __cplusplus
769 /* Obsolete. */
770 # define TRUE true
771 # define FALSE false
772 #else /* !__cplusplus */
773 # undef bool
774 # undef true
775 # undef false
776
777 # define bool unsigned char
778 # define true 1
779 # define false 0
780
781 /* Obsolete. */
782 # define TRUE true
783 # define FALSE false
784 #endif /* !__cplusplus */
785
786 /* Some compilers do not allow the use of unsigned char in bitfields. */
787 #define BOOL_BITFIELD unsigned int
788
789 /* As the last action in this file, we poison the identifiers that
790 shouldn't be used. Note, luckily gcc-3.0's token-based integrated
791 preprocessor won't trip on poisoned identifiers that arrive from
792 the expansion of macros. E.g. #define strrchr rindex, won't error
793 if rindex is poisoned after this directive is issued and later on
794 strrchr is called.
795
796 Note: We define bypass macros for the few cases where we really
797 want to use the libc memory allocation routines. Otherwise we
798 insist you use the "x" versions from libiberty. */
799
800 #define really_call_malloc malloc
801 #define really_call_calloc calloc
802 #define really_call_realloc realloc
803
804 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
805 /* Flex and bison use malloc and realloc. Yuk. Note that this means
806 really_call_* cannot be used in a .l or .y file. */
807 #define malloc xmalloc
808 #define realloc xrealloc
809 #endif
810
811 #if (GCC_VERSION >= 3000)
812
813 /* Note autoconf checks for prototype declarations and includes
814 system.h while doing so. Only poison these tokens if actually
815 compiling gcc, so that the autoconf declaration tests for malloc
816 etc don't spuriously fail. */
817 #ifdef IN_GCC
818
819 #ifndef USES_ISL
820 #undef calloc
821 #undef strdup
822 #pragma GCC poison calloc strdup
823 #endif
824
825 #if !defined(FLEX_SCANNER) && !defined(YYBISON)
826 #undef malloc
827 #undef realloc
828 #pragma GCC poison malloc realloc
829 #endif
830
831 /* The %m format should be used when GCC's main diagnostic functions
832 supporting %m are available, and xstrerror from libiberty
833 otherwise. */
834 #undef strerror
835 #pragma GCC poison strerror
836
837 /* loc_t is defined on some systems and too inviting for some
838 programmers to avoid. */
839 #undef loc_t
840 #pragma GCC poison loc_t
841
842 /* Old target macros that have moved to the target hooks structure. */
843 #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN \
844 FUNCTION_PROLOGUE FUNCTION_EPILOGUE \
845 FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE \
846 DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES \
847 VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE \
848 SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES \
849 MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES \
850 MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR \
851 ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE \
852 WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
853 ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL \
854 ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS \
855 ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
856 ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
857 INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
858 DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL \
859 MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
860 PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM \
861 ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
862 STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING \
863 PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM \
864 SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS \
865 DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS \
866 HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX \
867 MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE \
868 VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN \
869 FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL \
870 ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
871 CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE \
872 TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING \
873 RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS \
874 OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P \
875 USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO \
876 LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP \
877 LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP \
878 CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
879 HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
880 OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
881 ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK LIBGCC2_HAS_SF_MODE \
882 LIBGCC2_HAS_DF_MODE LIBGCC2_HAS_XF_MODE LIBGCC2_HAS_TF_MODE \
883 CLEAR_BY_PIECES_P MOVE_BY_PIECES_P SET_BY_PIECES_P \
884 STORE_BY_PIECES_P
885
886 /* Target macros only used for code built for the target, that have
887 moved to libgcc-tm.h or have never been present elsewhere. */
888 #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX \
889 MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK \
890 REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
891
892 /* Other obsolete target macros, or macros that used to be in target
893 headers and were not used, and may be obsolete or may never have
894 been used. */
895 #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES \
896 ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK \
897 DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
898 OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR \
899 LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC \
900 STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE \
901 SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH \
902 TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE \
903 NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
904 BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER \
905 FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE \
906 MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER \
907 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN \
908 OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE \
909 ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT \
910 DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME \
911 DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE \
912 INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT \
913 EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER \
914 LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES \
915 LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE \
916 CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME \
917 FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP \
918 PROMOTED_MODE EXPAND_BUILTIN_VA_END \
919 LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE \
920 GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE \
921 MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD \
922 FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE \
923 TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE \
924 DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE \
925 SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY \
926 SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE \
927 DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG \
928 COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB \
929 ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER \
930 GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER \
931 PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END \
932 DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE \
933 NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE \
934 CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0 \
935 TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT \
936 LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE \
937 TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC \
938 PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP \
939 EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION \
940 TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION \
941 SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON \
942 ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE \
943 STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD \
944 ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE \
945 ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES \
946 SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
947 TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP \
948 HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE \
949 FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST \
950 USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE \
951 FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION \
952 MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS \
953 SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES \
954 PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR \
955 STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT \
956 LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO \
957 IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC \
958 DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT \
959 REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P \
960 TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS \
961 IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP \
962 UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP \
963 USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
964 CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC \
965 GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE \
966 ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS \
967 REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
968 CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT \
969 REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT \
970 EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT \
971 EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P \
972 CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL \
973 ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
974 LIBGCC2_LONG_DOUBLE_TYPE_SIZE STRUCT_VALUE EH_FRAME_IN_DATA_SECTION
975
976 /* Hooks that are no longer used. */
977 #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE \
978 LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
979 LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
980 LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
981 LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
982 LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
983 TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
984 LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
985 TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
986 TARGET_IRA_COVER_CLASSES TARGET_HELP \
987 TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
988 TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
989 TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
990 TARGET_MD_ASM_CLOBBERS TARGET_RELAXED_ORDERING EXTENDED_SDB_BASIC_TYPES
991
992 /* Arrays that were deleted in favor of a functional interface. */
993 #pragma GCC poison built_in_decls implicit_built_in_decls
994
995 /* Hooks into libgcc2. */
996 #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
997 LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
998
999 /* Miscellaneous macros that are no longer used. */
1000 #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
1001
1002 /* Libiberty macros that are no longer used in GCC. */
1003 #undef ANSI_PROTOTYPES
1004 #undef PTR_CONST
1005 #undef LONG_DOUBLE
1006 #undef VPARAMS
1007 #undef VA_OPEN
1008 #undef VA_FIXEDARG
1009 #undef VA_CLOSE
1010 #undef VA_START
1011 #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
1012 VA_FIXEDARG VA_CLOSE VA_START
1013 #endif /* IN_GCC */
1014
1015 /* Front ends should never have to include middle-end headers. Enforce
1016 this by poisoning the header double-include protection defines. */
1017 #ifdef IN_GCC_FRONTEND
1018 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
1019 #endif
1020
1021 /* Note: not all uses of the `index' token (e.g. variable names and
1022 structure members) have been eliminated. */
1023 #undef bcopy
1024 #undef bzero
1025 #undef bcmp
1026 #undef rindex
1027 #pragma GCC poison bcopy bzero bcmp rindex
1028
1029 /* Poison ENABLE_CHECKING macro that should be replaced with
1030 'if (flag_checking)', or with CHECKING_P macro. */
1031 #pragma GCC poison ENABLE_CHECKING
1032
1033 #endif /* GCC >= 3.0 */
1034
1035 /* This macro allows casting away const-ness to pass -Wcast-qual
1036 warnings. DO NOT USE THIS UNLESS YOU REALLY HAVE TO! It should
1037 only be used in certain specific cases. One valid case is where
1038 the C standard definitions or prototypes force you to. E.g. if you
1039 need to free a const object, or if you pass a const string to
1040 execv, et al. Another valid use would be in an allocation function
1041 that creates const objects that need to be initialized. In some
1042 cases we have non-const functions that return the argument
1043 (e.g. next_nonnote_insn). Rather than create const shadow
1044 functions, we can cast away const-ness in calling these interfaces
1045 if we're careful to verify that the called function does indeed not
1046 modify its argument and the return value is only used in a const
1047 context. (This can be somewhat dangerous as these assumptions can
1048 change after the fact). Beyond these uses, most other cases of
1049 using this macro should be viewed with extreme caution. */
1050
1051 #ifdef __cplusplus
1052 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
1053 #else
1054 #if defined(__GNUC__) && GCC_VERSION > 4000
1055 /* GCC 4.0.x has a bug where it may ICE on this expression,
1056 so does GCC 3.4.x (PR17436). */
1057 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
1058 #elif defined(__GNUC__)
1059 static inline char *
helper_const_non_const_cast(const char * p)1060 helper_const_non_const_cast (const char *p)
1061 {
1062 union {
1063 const char *const_c;
1064 char *c;
1065 } val;
1066 val.const_c = p;
1067 return val.c;
1068 }
1069
1070 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1071 ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1072 #else
1073 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1074 #endif
1075 #endif
1076 #define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1077 #define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1078 #define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1079 #define CONST_CAST_RTX_INSN(X) CONST_CAST (struct rtx_insn *, (X))
1080 #define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1081 #define CONST_CAST_GIMPLE(X) CONST_CAST (gimple *, (X))
1082
1083 /* Activate certain diagnostics as warnings (not errors via the
1084 -Werror flag). */
1085 #if GCC_VERSION >= 4003
1086 /* If asserts are disabled, activate -Wuninitialized as a warning (not
1087 an error/-Werror). */
1088 #ifndef ENABLE_ASSERT_CHECKING
1089 #pragma GCC diagnostic warning "-Wuninitialized"
1090 #endif
1091 #endif
1092
1093 #ifdef ENABLE_VALGRIND_ANNOTATIONS
1094 # ifdef HAVE_VALGRIND_MEMCHECK_H
1095 # include <valgrind/memcheck.h>
1096 # elif defined HAVE_MEMCHECK_H
1097 # include <memcheck.h>
1098 # else
1099 # include <valgrind.h>
1100 # endif
1101 /* Compatibility macros to let valgrind 3.1 work. */
1102 # ifndef VALGRIND_MAKE_MEM_NOACCESS
1103 # define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1104 # endif
1105 # ifndef VALGRIND_MAKE_MEM_DEFINED
1106 # define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1107 # endif
1108 # ifndef VALGRIND_MAKE_MEM_UNDEFINED
1109 # define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1110 # endif
1111 #else
1112 /* Avoid #ifdef:s when we can help it. */
1113 #define VALGRIND_DISCARD(x)
1114 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1115 #define VALGRIND_FREELIKE_BLOCK(x,y)
1116 #endif
1117
1118 /* In LTO -fwhole-program build we still want to keep the debug functions available
1119 for debugger. Mark them as used to prevent removal. */
1120 #if (GCC_VERSION > 4000)
1121 #define DEBUG_FUNCTION __attribute__ ((__used__))
1122 #define DEBUG_VARIABLE __attribute__ ((__used__))
1123 #else
1124 #define DEBUG_FUNCTION
1125 #define DEBUG_VARIABLE
1126 #endif
1127
1128 /* General macro to extract bit Y of X. */
1129 #define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
1130
1131 /* Get definitions of HOST_WIDE_INT. */
1132 #include "hwint.h"
1133
1134 #endif /* ! GCC_SYSTEM_H */
1135