1/* Get common system includes and various definitions and declarations based
2 on autoconf macros.
3 Copyright (C) 1998-2017 Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 3, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along 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
103extern "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
110extern 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
117extern 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
124extern 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
131extern 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
138extern 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
145extern 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
152extern 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
159extern 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
166extern 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
173extern 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
182extern 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
216extern 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
452extern "C" {
453#endif
454
455#if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
456extern double atof (const char *);
457#endif
458
459#if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
460extern long atol (const char *);
461#endif
462
463#if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
464extern void free (void *);
465#endif
466
467#if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
468extern char *getcwd (char *, size_t);
469#endif
470
471#if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
472extern char *getenv (const char *);
473#endif
474
475#if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
476extern int getopt (int, char * const *, const char *);
477#endif
478
479#if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE
480extern int getpagesize (void);
481#endif
482
483#if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
484extern char *getwd (char *);
485#endif
486
487#if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
488extern void *sbrk (int);
489#endif
490
491#if defined (HAVE_DECL_SETENV) && !HAVE_DECL_SETENV
492int setenv(const char *, const char *, int);
493#endif
494
495#if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
496extern char *strstr (const char *, const char *);
497#endif
498
499#if defined (HAVE_DECL_STPCPY) && !HAVE_DECL_STPCPY
500extern char *stpcpy (char *, const char *);
501#endif
502
503#if defined (HAVE_DECL_UNSETENV) && !HAVE_DECL_UNSETENV
504int unsetenv(const char *);
505#endif
506
507#if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
508extern void *malloc (size_t);
509#endif
510
511#if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
512extern void *calloc (size_t, size_t);
513#endif
514
515#if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
516extern 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
532extern "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
540extern 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
547struct rlimit;
548extern 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
556struct rlimit;
557extern int setrlimit (int, const struct rlimit *);
558# endif
559# endif
560#endif
561
562#if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
563extern void abort (void);
564#endif
565
566#if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
567extern int snprintf (char *, size_t, const char *, ...);
568#endif
569
570#if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
571extern 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#ifdef __cplusplus
581#define HAVE_DESIGNATED_INITIALIZERS 0
582#else
583#define HAVE_DESIGNATED_INITIALIZERS \
584 ((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L))
585#endif
586#endif
587
588#if !defined(HAVE_DESIGNATED_UNION_INITIALIZERS)
589#ifdef __cplusplus
590#define HAVE_DESIGNATED_UNION_INITIALIZERS (GCC_VERSION >= 4007)
591#else
592#define HAVE_DESIGNATED_UNION_INITIALIZERS \
593 ((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L))
594#endif
595#endif
596
597#if HAVE_SYS_STAT_H
598# include <sys/stat.h>
599#endif
600
601/* Test if something is a normal file. */
602#ifndef S_ISREG
603#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
604#endif
605
606/* Test if something is a directory. */
607#ifndef S_ISDIR
608#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
609#endif
610
611/* Test if something is a character special file. */
612#ifndef S_ISCHR
613#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
614#endif
615
616/* Test if something is a block special file. */
617#ifndef S_ISBLK
618#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
619#endif
620
621/* Test if something is a socket. */
622#ifndef S_ISSOCK
623# ifdef S_IFSOCK
624# define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
625# else
626# define S_ISSOCK(m) 0
627# endif
628#endif
629
630/* Test if something is a FIFO. */
631#ifndef S_ISFIFO
632# ifdef S_IFIFO
633# define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
634# else
635# define S_ISFIFO(m) 0
636# endif
637#endif
638
639/* Define well known filenos if the system does not define them. */
640#ifndef STDIN_FILENO
641# define STDIN_FILENO 0
642#endif
643#ifndef STDOUT_FILENO
644# define STDOUT_FILENO 1
645#endif
646#ifndef STDERR_FILENO
647# define STDERR_FILENO 2
648#endif
649
650/* Some systems have mkdir that takes a single argument. */
651#ifdef MKDIR_TAKES_ONE_ARG
652# define mkdir(a,b) mkdir (a)
653#endif
654
655#ifndef HAVE_KILL
656# define kill(p,s) raise (s)
657#endif
658
659/* Provide a way to print an address via printf. */
660#ifndef HOST_PTR_PRINTF
661#define HOST_PTR_PRINTF "%p"
662#endif /* ! HOST_PTR_PRINTF */
663
664/* By default, colon separates directories in a path. */
665#ifndef PATH_SEPARATOR
666#define PATH_SEPARATOR ':'
667#endif
668
669/* Filename handling macros. */
670#include "filenames.h"
671
672/* These should be phased out in favor of IS_DIR_SEPARATOR, where possible. */
673#ifndef DIR_SEPARATOR
674# define DIR_SEPARATOR '/'
675# ifdef HAVE_DOS_BASED_FILE_SYSTEM
676# define DIR_SEPARATOR_2 '\\'
677# endif
678#endif
679
680#if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H)
681/* If plugin support is enabled, we could use libdl. */
682#include <dlfcn.h>
683#endif
684
685/* Do not introduce a gmp.h dependency on the build system. */
686#ifndef GENERATOR_FILE
687#include <gmp.h>
688#endif
689
690/* Get libiberty declarations. */
691#include "libiberty.h"
692
693#undef FFS /* Some systems predefine this symbol; don't let it interfere. */
694#undef FLOAT /* Likewise. */
695#undef ABS /* Likewise. */
696#undef PC /* Likewise. */
697
698/* Provide a default for the HOST_BIT_BUCKET.
699 This suffices for POSIX-like hosts. */
700
701#ifndef HOST_BIT_BUCKET
702#define HOST_BIT_BUCKET "/dev/null"
703#endif
704
705#ifndef offsetof
706#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
707#endif
708
709/* Various error reporting routines want to use __FUNCTION__. */
710#if (GCC_VERSION < 2007)
711#ifndef __FUNCTION__
712#define __FUNCTION__ "?"
713#endif /* ! __FUNCTION__ */
714#endif
715
716/* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
717 the most likely value of A is B. This feature was added at some point
718 between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */
719#if (GCC_VERSION < 3000)
720#define __builtin_expect(a, b) (a)
721#endif
722
723/* Some of the headers included by <memory> can use "abort" within a
724 namespace, e.g. "_VSTD::abort();", which fails after we use the
725 preprocessor to redefine "abort" as "fancy_abort" below.
726 Given that unique-ptr.h can use "free", we need to do this after "free"
727 is declared but before "abort" is overridden. */
728
729#ifdef INCLUDE_UNIQUE_PTR
730# include "unique-ptr.h"
731#endif
732
733/* Redefine abort to report an internal error w/o coredump, and
734 reporting the location of the error in the source file. */
735extern void fancy_abort (const char *, int, const char *)
736 ATTRIBUTE_NORETURN ATTRIBUTE_COLD;
737#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
738
739/* Use gcc_assert(EXPR) to test invariants. */
740#if ENABLE_ASSERT_CHECKING
741#define gcc_assert(EXPR) \
742 ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0))
743#elif (GCC_VERSION >= 4005)
744#define gcc_assert(EXPR) \
745 ((void)(__builtin_expect (!(EXPR), 0) ? __builtin_unreachable (), 0 : 0))
746#else
747/* Include EXPR, so that unused variable warnings do not occur. */
748#define gcc_assert(EXPR) ((void)(0 && (EXPR)))
749#endif
750
751#if CHECKING_P
752#define gcc_checking_assert(EXPR) gcc_assert (EXPR)
753#else
754/* N.B.: in release build EXPR is not evaluated. */
755#define gcc_checking_assert(EXPR) ((void)(0 && (EXPR)))
756#endif
757
758#if GCC_VERSION >= 4000
759#define ALWAYS_INLINE inline __attribute__ ((always_inline))
760#else
761#define ALWAYS_INLINE inline
762#endif
763
764/* Use gcc_unreachable() to mark unreachable locations (like an
765 unreachable default case of a switch. Do not use gcc_assert(0). */
766#if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING
767#define gcc_unreachable() __builtin_unreachable ()
768#else
769#define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__))
770#endif
771
772#if GCC_VERSION >= 7000 && defined(__has_attribute)
773# if __has_attribute(fallthrough)
774# define gcc_fallthrough() __attribute__((fallthrough))
775# else
776# define gcc_fallthrough()
777# endif
778#else
779# define gcc_fallthrough()
780#endif
781
782#if GCC_VERSION >= 3001
783#define STATIC_CONSTANT_P(X) (__builtin_constant_p (X) && (X))
784#else
785#define STATIC_CONSTANT_P(X) (false && (X))
786#endif
787
788/* static_assert (COND, MESSAGE) is available in C++11 onwards. */
789#if __cplusplus >= 201103L
790#define STATIC_ASSERT(X) \
791 static_assert ((X), #X)
792#else
793#define STATIC_ASSERT(X) \
794 typedef int assertion1[(X) ? 1 : -1] ATTRIBUTE_UNUSED
795#endif
796
797/* Provide a fake boolean type. We make no attempt to use the
798 C99 _Bool, as it may not be available in the bootstrap compiler,
799 and even if it is, it is liable to be buggy.
800 This must be after all inclusion of system headers, as some of
801 them will mess us up. */
802
803#undef TRUE
804#undef FALSE
805
806#ifdef __cplusplus
807 /* Obsolete. */
808# define TRUE true
809# define FALSE false
810#else /* !__cplusplus */
811# undef bool
812# undef true
813# undef false
814
815# define bool unsigned char
816# define true 1
817# define false 0
818
819 /* Obsolete. */
820# define TRUE true
821# define FALSE false
822#endif /* !__cplusplus */
823
824/* Some compilers do not allow the use of unsigned char in bitfields. */
825#define BOOL_BITFIELD unsigned int
826
827/* As the last action in this file, we poison the identifiers that
828 shouldn't be used. Note, luckily gcc-3.0's token-based integrated
829 preprocessor won't trip on poisoned identifiers that arrive from
830 the expansion of macros. E.g. #define strrchr rindex, won't error
831 if rindex is poisoned after this directive is issued and later on
832 strrchr is called.
833
834 Note: We define bypass macros for the few cases where we really
835 want to use the libc memory allocation routines. Otherwise we
836 insist you use the "x" versions from libiberty. */
837
838#define really_call_malloc malloc
839#define really_call_calloc calloc
840#define really_call_realloc realloc
841
842#if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC)
843/* Flex and bison use malloc and realloc. Yuk. Note that this means
844 really_call_* cannot be used in a .l or .y file. */
845#define malloc xmalloc
846#define realloc xrealloc
847#endif
848
849#if (GCC_VERSION >= 3000)
850
851/* Note autoconf checks for prototype declarations and includes
852 system.h while doing so. Only poison these tokens if actually
853 compiling gcc, so that the autoconf declaration tests for malloc
854 etc don't spuriously fail. */
855#ifdef IN_GCC
856
857#ifndef USES_ISL
858#undef calloc
859#undef strdup
860#undef strndup
861 #pragma GCC poison calloc strdup strndup
862#endif
863
864#if !defined(FLEX_SCANNER) && !defined(YYBISON)
865#undef malloc
866#undef realloc
867 #pragma GCC poison malloc realloc
868#endif
869
870/* The %m format should be used when GCC's main diagnostic functions
871 supporting %m are available, and xstrerror from libiberty
872 otherwise. */
873#undef strerror
874 #pragma GCC poison strerror
875
876/* loc_t is defined on some systems and too inviting for some
877 programmers to avoid. */
878#undef loc_t
879 #pragma GCC poison loc_t
880
881/* Old target macros that have moved to the target hooks structure. */
882 #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN \
883 FUNCTION_PROLOGUE FUNCTION_EPILOGUE \
884 FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE \
885 DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES \
886 VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE \
887 SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES \
888 MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES \
889 MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR \
890 ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE \
891 WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
892 ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL \
893 ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS \
894 ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \
895 ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \
896 INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \
897 DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL \
898 MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \
899 PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM \
900 ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \
901 STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING \
902 PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM \
903 SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS \
904 DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS \
905 HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX \
906 MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE \
907 VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN \
908 FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL \
909 ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \
910 CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE \
911 TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING \
912 RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS \
913 OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P \
914 USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO \
915 LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP \
916 LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP \
917 CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
918 HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT \
919 OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT \
920 ASM_BYTE_OP MEMBER_TYPE_FORCES_BLK LIBGCC2_HAS_SF_MODE \
921 LIBGCC2_HAS_DF_MODE LIBGCC2_HAS_XF_MODE LIBGCC2_HAS_TF_MODE \
922 CLEAR_BY_PIECES_P MOVE_BY_PIECES_P SET_BY_PIECES_P \
923 STORE_BY_PIECES_P TARGET_FLT_EVAL_METHOD \
924 HARD_REGNO_CALL_PART_CLOBBERED HARD_REGNO_MODE_OK \
925 MODES_TIEABLE_P FUNCTION_ARG_PADDING SLOW_UNALIGNED_ACCESS \
926 HARD_REGNO_NREGS SECONDARY_MEMORY_NEEDED_MODE \
927 SECONDARY_MEMORY_NEEDED CANNOT_CHANGE_MODE_CLASS \
928 TRULY_NOOP_TRUNCATION FUNCTION_ARG_OFFSET CONSTANT_ALIGNMENT \
929 STARTING_FRAME_OFFSET
930
931/* Target macros only used for code built for the target, that have
932 moved to libgcc-tm.h or have never been present elsewhere. */
933 #pragma GCC poison DECLARE_LIBRARY_RENAMES LIBGCC2_GNU_PREFIX \
934 MD_UNWIND_SUPPORT MD_FROB_UPDATE_CONTEXT ENABLE_EXECUTE_STACK \
935 REG_VALUE_IN_UNWIND_CONTEXT ASSUME_EXTENDED_UNWIND_CONTEXT
936
937/* Other obsolete target macros, or macros that used to be in target
938 headers and were not used, and may be obsolete or may never have
939 been used. */
940 #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES \
941 ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK \
942 DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
943 OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR \
944 LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC \
945 STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE \
946 SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH \
947 TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE \
948 NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
949 BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER \
950 FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE \
951 MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER \
952 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN \
953 OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE \
954 ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT \
955 DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME \
956 DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE \
957 INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT \
958 EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER \
959 LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES \
960 LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE \
961 CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME \
962 FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP \
963 PROMOTED_MODE EXPAND_BUILTIN_VA_END \
964 LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE \
965 GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE \
966 MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD \
967 FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE \
968 TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE \
969 DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE \
970 SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY \
971 SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE \
972 DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG \
973 COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB \
974 ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER \
975 GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER \
976 PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END \
977 DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE \
978 NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE \
979 CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0 \
980 TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT \
981 LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE \
982 TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC \
983 PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP \
984 EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION \
985 TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION \
986 SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON \
987 ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE \
988 STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD \
989 ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE \
990 ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES \
991 SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \
992 TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP \
993 HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE \
994 FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST \
995 USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE \
996 FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION \
997 MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS \
998 SETJMP_VIA_SAVE_AREA FORBIDDEN_INC_DEC_CLASSES \
999 PREFERRED_OUTPUT_RELOAD_CLASS SYSTEM_INCLUDE_DIR \
1000 STANDARD_INCLUDE_DIR STANDARD_INCLUDE_COMPONENT \
1001 LINK_ELIMINATE_DUPLICATE_LDIRECTORIES MIPS_DEBUGGING_INFO \
1002 IDENT_ASM_OP ALL_COP_ADDITIONAL_REGISTER_NAMES DBX_OUTPUT_LBRAC \
1003 DBX_OUTPUT_NFUN DBX_OUTPUT_RBRAC RANGE_TEST_NON_SHORT_CIRCUIT \
1004 REAL_VALUE_TRUNCATE REVERSE_CONDEXEC_PREDICATES_P \
1005 TARGET_ALIGN_ANON_BITFIELDS TARGET_NARROW_VOLATILE_BITFIELDS \
1006 IDENT_ASM_OP UNALIGNED_SHORT_ASM_OP UNALIGNED_INT_ASM_OP \
1007 UNALIGNED_LONG_ASM_OP UNALIGNED_DOUBLE_INT_ASM_OP \
1008 USE_COMMON_FOR_ONE_ONLY IFCVT_EXTRA_FIELDS IFCVT_INIT_EXTRA_FIELDS \
1009 CASE_USE_BIT_TESTS FIXUNS_TRUNC_LIKE_FIX_TRUNC \
1010 GO_IF_MODE_DEPENDENT_ADDRESS DELAY_SLOTS_FOR_EPILOGUE \
1011 ELIGIBLE_FOR_EPILOGUE_DELAY TARGET_C99_FUNCTIONS TARGET_HAS_SINCOS \
1012 REG_CLASS_FROM_LETTER CONST_OK_FOR_LETTER_P \
1013 CONST_DOUBLE_OK_FOR_LETTER_P EXTRA_CONSTRAINT \
1014 REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT \
1015 EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT \
1016 EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P \
1017 CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL \
1018 ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
1019 LIBGCC2_LONG_DOUBLE_TYPE_SIZE STRUCT_VALUE \
1020 EH_FRAME_IN_DATA_SECTION TARGET_FLT_EVAL_METHOD_NON_DEFAULT \
1021 JCR_SECTION_NAME TARGET_USE_JCR_SECTION SDB_DEBUGGING_INFO \
1022 SDB_DEBUG
1023
1024/* Hooks that are no longer used. */
1025 #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE \
1026 LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \
1027 LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \
1028 LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \
1029 LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \
1030 LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \
1031 TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \
1032 LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \
1033 TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION \
1034 TARGET_IRA_COVER_CLASSES TARGET_HELP \
1035 TARGET_HANDLE_PRAGMA_EXTERN_PREFIX \
1036 TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_EVEN \
1037 TARGET_VECTORIZE_BUILTIN_MUL_WIDEN_ODD \
1038 TARGET_MD_ASM_CLOBBERS TARGET_RELAXED_ORDERING \
1039 EXTENDED_SDB_BASIC_TYPES TARGET_INVALID_PARAMETER_TYPE \
1040 TARGET_INVALID_RETURN_TYPE
1041
1042/* Arrays that were deleted in favor of a functional interface. */
1043 #pragma GCC poison built_in_decls implicit_built_in_decls
1044
1045/* Hooks into libgcc2. */
1046 #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \
1047 LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
1048
1049/* Miscellaneous macros that are no longer used. */
1050 #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT
1051
1052/* Libiberty macros that are no longer used in GCC. */
1053#undef ANSI_PROTOTYPES
1054#undef PTR_CONST
1055#undef LONG_DOUBLE
1056#undef VPARAMS
1057#undef VA_OPEN
1058#undef VA_FIXEDARG
1059#undef VA_CLOSE
1060#undef VA_START
1061 #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
1062 VA_FIXEDARG VA_CLOSE VA_START
1063#endif /* IN_GCC */
1064
1065/* Front ends should never have to include middle-end headers. Enforce
1066 this by poisoning the header double-include protection defines. */
1067#ifdef IN_GCC_FRONTEND
1068#pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H
1069#endif
1070
1071/* Note: not all uses of the `index' token (e.g. variable names and
1072 structure members) have been eliminated. */
1073#undef bcopy
1074#undef bzero
1075#undef bcmp
1076#undef rindex
1077 #pragma GCC poison bcopy bzero bcmp rindex
1078
1079/* Poison ENABLE_CHECKING macro that should be replaced with
1080 'if (flag_checking)', or with CHECKING_P macro. */
1081#pragma GCC poison ENABLE_CHECKING
1082
1083#endif /* GCC >= 3.0 */
1084
1085/* This macro allows casting away const-ness to pass -Wcast-qual
1086 warnings. DO NOT USE THIS UNLESS YOU REALLY HAVE TO! It should
1087 only be used in certain specific cases. One valid case is where
1088 the C standard definitions or prototypes force you to. E.g. if you
1089 need to free a const object, or if you pass a const string to
1090 execv, et al. Another valid use would be in an allocation function
1091 that creates const objects that need to be initialized. In some
1092 cases we have non-const functions that return the argument
1093 (e.g. next_nonnote_insn). Rather than create const shadow
1094 functions, we can cast away const-ness in calling these interfaces
1095 if we're careful to verify that the called function does indeed not
1096 modify its argument and the return value is only used in a const
1097 context. (This can be somewhat dangerous as these assumptions can
1098 change after the fact). Beyond these uses, most other cases of
1099 using this macro should be viewed with extreme caution. */
1100
1101#ifdef __cplusplus
1102#define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X))
1103#else
1104#if defined(__GNUC__) && GCC_VERSION > 4000
1105/* GCC 4.0.x has a bug where it may ICE on this expression,
1106 so does GCC 3.4.x (PR17436). */
1107#define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq)
1108#elif defined(__GNUC__)
1109static inline char *
1110helper_const_non_const_cast (const char *p)
1111{
1112 union {
1113 const char *const_c;
1114 char *c;
1115 } val;
1116 val.const_c = p;
1117 return val.c;
1118}
1119
1120#define CONST_CAST2(TOTYPE,FROMTYPE,X) \
1121 ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X)))
1122#else
1123#define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X))
1124#endif
1125#endif
1126#define CONST_CAST(TYPE,X) CONST_CAST2 (TYPE, const TYPE, (X))
1127#define CONST_CAST_TREE(X) CONST_CAST (union tree_node *, (X))
1128#define CONST_CAST_RTX(X) CONST_CAST (struct rtx_def *, (X))
1129#define CONST_CAST_RTX_INSN(X) CONST_CAST (struct rtx_insn *, (X))
1130#define CONST_CAST_BB(X) CONST_CAST (struct basic_block_def *, (X))
1131#define CONST_CAST_GIMPLE(X) CONST_CAST (gimple *, (X))
1132
1133/* Activate certain diagnostics as warnings (not errors via the
1134 -Werror flag). */
1135#if GCC_VERSION >= 4003
1136/* If asserts are disabled, activate -Wuninitialized as a warning (not
1137 an error/-Werror). */
1138#ifndef ENABLE_ASSERT_CHECKING
1139#pragma GCC diagnostic warning "-Wuninitialized"
1140#endif
1141#endif
1142
1143#ifdef ENABLE_VALGRIND_ANNOTATIONS
1144# ifdef HAVE_VALGRIND_MEMCHECK_H
1145# include <valgrind/memcheck.h>
1146# elif defined HAVE_MEMCHECK_H
1147# include <memcheck.h>
1148# else
1149# include <valgrind.h>
1150# endif
1151/* Compatibility macros to let valgrind 3.1 work. */
1152# ifndef VALGRIND_MAKE_MEM_NOACCESS
1153# define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS
1154# endif
1155# ifndef VALGRIND_MAKE_MEM_DEFINED
1156# define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE
1157# endif
1158# ifndef VALGRIND_MAKE_MEM_UNDEFINED
1159# define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE
1160# endif
1161#else
1162/* Avoid #ifdef:s when we can help it. */
1163#define VALGRIND_DISCARD(x)
1164#define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z)
1165#define VALGRIND_FREELIKE_BLOCK(x,y)
1166#endif
1167
1168/* Macros to temporarily ignore some warnings. */
1169#if GCC_VERSION >= 6000
1170#define GCC_DIAGNOSTIC_STRINGIFY(x) #x
1171#define GCC_DIAGNOSTIC_PUSH_IGNORED(x) \
1172 _Pragma ("GCC diagnostic push") \
1173 _Pragma (GCC_DIAGNOSTIC_STRINGIFY (GCC diagnostic ignored #x))
1174#define GCC_DIAGNOSTIC_POP _Pragma ("GCC diagnostic pop")
1175#else
1176#define GCC_DIAGNOSTIC_PUSH_IGNORED(x)
1177#define GCC_DIAGNOSTIC_POP
1178#endif
1179
1180/* In LTO -fwhole-program build we still want to keep the debug functions available
1181 for debugger. Mark them as used to prevent removal. */
1182#if (GCC_VERSION > 4000)
1183#define DEBUG_FUNCTION __attribute__ ((__used__))
1184#define DEBUG_VARIABLE __attribute__ ((__used__))
1185#else
1186#define DEBUG_FUNCTION
1187#define DEBUG_VARIABLE
1188#endif
1189
1190/* General macro to extract bit Y of X. */
1191#define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
1192
1193/* Get definitions of HOST_WIDE_INT. */
1194#include "hwint.h"
1195
1196/* qsort comparator consistency checking: except in release-checking compilers,
1197 redirect 4-argument qsort calls to qsort_chk; keep 1-argument invocations
1198 corresponding to vec::qsort (cmp): they use C qsort internally anyway. */
1199#if CHECKING_P
1200#define PP_5th(a1, a2, a3, a4, a5, ...) a5
1201#undef qsort
1202#define qsort(...) PP_5th (__VA_ARGS__, qsort_chk, 3, 2, qsort, 0) (__VA_ARGS__)
1203void qsort_chk (void *, size_t, size_t, int (*)(const void *, const void *));
1204#endif
1205
1206#endif /* ! GCC_SYSTEM_H */
1207