Daily bump.
[official-gcc.git] / gcc / system.h
blobca8a21c4701425433a5b925cb208dd0a791f1459
1 /* Get common system includes and various definitions and declarations based
2 on autoconf macros.
3 Copyright (C) 1998, 1999, 2000, 2001, 2002 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 2, 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 COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
23 #ifndef GCC_SYSTEM_H
24 #define GCC_SYSTEM_H
26 /* This is the location of the online document giving information how
27 to report bugs. If you change this string, also check for strings
28 not under control of the preprocessor. */
29 #define GCCBUGURL "<URL:http://www.gnu.org/software/gcc/bugs.html>"
31 /* We must include stdarg.h/varargs.h before stdio.h. */
32 #ifdef ANSI_PROTOTYPES
33 #include <stdarg.h>
34 #else
35 #include <varargs.h>
36 #endif
38 #ifndef va_copy
39 # ifdef __va_copy
40 # define va_copy(d,s) __va_copy((d),(s))
41 # else
42 # define va_copy(d,s) ((d) = (s))
43 # endif
44 #endif
46 #ifdef HAVE_STDDEF_H
47 # include <stddef.h>
48 #endif
50 #include <stdio.h>
52 /* Define a generic NULL if one hasn't already been defined. */
53 #ifndef NULL
54 #define NULL 0
55 #endif
57 /* The compiler is not a multi-threaded application and therefore we
58 do not have to use the locking functions. In fact, using the locking
59 functions can cause the compiler to be significantly slower under
60 I/O bound conditions (such as -g -O0 on very large source files).
62 HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
63 code is multi-thread safe by default. If it is set to 0, then do
64 not worry about using the _unlocked functions.
66 fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
67 extensions and need to be prototyped by hand (since we do not
68 define _GNU_SOURCE). */
70 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
72 # ifdef HAVE_PUTC_UNLOCKED
73 # undef putc
74 # define putc(C, Stream) putc_unlocked (C, Stream)
75 # endif
76 # ifdef HAVE_FPUTC_UNLOCKED
77 # undef fputc
78 # define fputc(C, Stream) fputc_unlocked (C, Stream)
79 # endif
81 # ifdef HAVE_FPUTS_UNLOCKED
82 # undef fputs
83 # define fputs(String, Stream) fputs_unlocked (String, Stream)
84 # if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
85 extern int fputs_unlocked PARAMS ((const char *, FILE *));
86 # endif
87 # endif
88 # ifdef HAVE_FWRITE_UNLOCKED
89 # undef fwrite
90 # define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
91 # if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
92 extern int fwrite_unlocked PARAMS ((const PTR, size_t, size_t, FILE *));
93 # endif
94 # endif
95 # ifdef HAVE_FPRINTF_UNLOCKED
96 # undef fprintf
97 /* We can't use a function-like macro here because we don't know if
98 we have varargs macros. */
99 # define fprintf fprintf_unlocked
100 # if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
101 extern int fprintf_unlocked PARAMS ((FILE *, const char *, ...));
102 # endif
103 # endif
105 #endif
107 /* There are an extraordinary number of issues with <ctype.h>.
108 The last straw is that it varies with the locale. Use libiberty's
109 replacement instead. */
110 #include <safe-ctype.h>
112 #include <sys/types.h>
114 #include <errno.h>
116 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
117 extern int errno;
118 #endif
120 #ifdef STRING_WITH_STRINGS
121 # include <string.h>
122 # include <strings.h>
123 #else
124 # ifdef HAVE_STRING_H
125 # include <string.h>
126 # else
127 # ifdef HAVE_STRINGS_H
128 # include <strings.h>
129 # endif
130 # endif
131 #endif
133 #ifdef HAVE_STDLIB_H
134 # include <stdlib.h>
135 #endif
137 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
138 FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
139 or 0 and 1 if those macros are not defined. */
140 #ifndef SUCCESS_EXIT_CODE
141 # ifdef EXIT_SUCCESS
142 # define SUCCESS_EXIT_CODE EXIT_SUCCESS
143 # else
144 # define SUCCESS_EXIT_CODE 0
145 # endif
146 #endif
148 #ifndef FATAL_EXIT_CODE
149 # ifdef EXIT_FAILURE
150 # define FATAL_EXIT_CODE EXIT_FAILURE
151 # else
152 # define FATAL_EXIT_CODE 1
153 # endif
154 #endif
156 #ifdef HAVE_UNISTD_H
157 # include <unistd.h>
158 #endif
160 #ifdef HAVE_SYS_PARAM_H
161 # include <sys/param.h>
162 /* We use this identifier later and it appears in some vendor param.h's. */
163 # undef PREFETCH
164 #endif
166 #if HAVE_LIMITS_H
167 # include <limits.h>
168 #endif
170 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT. */
171 #include "hwint.h"
173 /* A macro to determine whether a VALUE lies inclusively within a
174 certain range without evaluating the VALUE more than once. This
175 macro won't warn if the VALUE is unsigned and the LOWER bound is
176 zero, as it would e.g. with "VALUE >= 0 && ...". Note the LOWER
177 bound *is* evaluated twice, and LOWER must not be greater than
178 UPPER. However the bounds themselves can be either positive or
179 negative. */
180 #define IN_RANGE(VALUE, LOWER, UPPER) \
181 ((unsigned HOST_WIDE_INT) ((VALUE) - (LOWER)) <= ((UPPER) - (LOWER)))
183 /* Infrastructure for defining missing _MAX and _MIN macros. Note that
184 macros defined with these cannot be used in #if. */
186 /* The extra casts work around common compiler bugs. */
187 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
188 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
189 It is necessary at least when t == time_t. */
190 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
191 ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
192 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
194 /* Use that infrastructure to provide a few constants. */
195 #ifndef UCHAR_MAX
196 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
197 #endif
199 #ifdef TIME_WITH_SYS_TIME
200 # include <sys/time.h>
201 # include <time.h>
202 #else
203 # if HAVE_SYS_TIME_H
204 # include <sys/time.h>
205 # else
206 # ifdef HAVE_TIME_H
207 # include <time.h>
208 # endif
209 # endif
210 #endif
212 #ifdef HAVE_FCNTL_H
213 # include <fcntl.h>
214 #else
215 # ifdef HAVE_SYS_FILE_H
216 # include <sys/file.h>
217 # endif
218 #endif
220 #ifndef SEEK_SET
221 # define SEEK_SET 0
222 # define SEEK_CUR 1
223 # define SEEK_END 2
224 #endif
225 #ifndef F_OK
226 # define F_OK 0
227 # define X_OK 1
228 # define W_OK 2
229 # define R_OK 4
230 #endif
231 #ifndef O_RDONLY
232 # define O_RDONLY 0
233 #endif
234 #ifndef O_WRONLY
235 # define O_WRONLY 1
236 #endif
238 /* Some systems define these in, e.g., param.h. We undefine these names
239 here to avoid the warnings. We prefer to use our definitions since we
240 know they are correct. */
242 #undef MIN
243 #undef MAX
244 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
245 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
247 /* Returns the least number N such that N * Y >= X. */
248 #define CEIL(x,y) (((x) + (y) - 1) / (y))
250 #ifdef HAVE_SYS_WAIT_H
251 #include <sys/wait.h>
252 #endif
254 #ifndef WIFSIGNALED
255 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
256 #endif
257 #ifndef WTERMSIG
258 #define WTERMSIG(S) ((S) & 0x7f)
259 #endif
260 #ifndef WIFEXITED
261 #define WIFEXITED(S) (((S) & 0xff) == 0)
262 #endif
263 #ifndef WEXITSTATUS
264 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
265 #endif
266 #ifndef WSTOPSIG
267 #define WSTOPSIG WEXITSTATUS
268 #endif
270 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1. If they
271 are defined to 0 then we must provide the relevant declaration
272 here. These checks will be in the undefined state while configure
273 is running so be careful to test "defined (HAVE_DECL_*)". */
275 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
276 extern double atof PARAMS ((const char *));
277 #endif
279 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
280 extern long atol PARAMS ((const char *));
281 #endif
283 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
284 extern void free PARAMS ((PTR));
285 #endif
287 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD
288 extern char *getcwd PARAMS ((char *, size_t));
289 #endif
291 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
292 extern char *getenv PARAMS ((const char *));
293 #endif
295 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT
296 extern int getopt PARAMS ((int, char * const *, const char *));
297 #endif
299 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD
300 extern char *getwd PARAMS ((char *));
301 #endif
303 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK
304 extern PTR sbrk PARAMS ((int));
305 #endif
307 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
308 extern char *strstr PARAMS ((const char *, const char *));
309 #endif
311 #ifdef HAVE_MALLOC_H
312 #include <malloc.h>
313 #endif
315 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
316 extern PTR malloc PARAMS ((size_t));
317 #endif
319 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
320 extern PTR calloc PARAMS ((size_t, size_t));
321 #endif
323 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
324 extern PTR realloc PARAMS ((PTR, size_t));
325 #endif
327 /* If the system doesn't provide strsignal, we get it defined in
328 libiberty but no declaration is supplied. */
329 #ifndef HAVE_STRSIGNAL
330 # ifndef strsignal
331 extern const char *strsignal PARAMS ((int));
332 # endif
333 #endif
335 #ifdef HAVE_GETRLIMIT
336 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT
337 # ifndef getrlimit
338 # ifdef ANSI_PROTOTYPES
339 struct rlimit;
340 # endif
341 extern int getrlimit PARAMS ((int, struct rlimit *));
342 # endif
343 # endif
344 #endif
346 #ifdef HAVE_SETRLIMIT
347 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT
348 # ifndef setrlimit
349 # ifdef ANSI_PROTOTYPES
350 struct rlimit;
351 # endif
352 extern int setrlimit PARAMS ((int, const struct rlimit *));
353 # endif
354 # endif
355 #endif
357 /* HAVE_VOLATILE only refers to the stage1 compiler. We also check
358 __STDC__ and assume gcc sets it and has volatile in stage >=2. */
359 #if !defined(HAVE_VOLATILE) && !defined(__STDC__) && !defined(volatile)
360 #define volatile
361 #endif
363 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
364 extern void abort PARAMS ((void));
365 #endif
367 /* 1 if we have C99 designated initializers. */
368 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
369 #define HAVE_DESIGNATED_INITIALIZERS \
370 ((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L))
371 #endif
373 /* 1 if we have _Bool. */
374 #ifndef HAVE__BOOL
375 # define HAVE__BOOL \
376 ((GCC_VERSION >= 3000) || (__STDC_VERSION__ >= 199901L))
377 #endif
380 #if HAVE_SYS_STAT_H
381 # include <sys/stat.h>
382 #endif
384 /* Test if something is a normal file. */
385 #ifndef S_ISREG
386 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
387 #endif
389 /* Test if something is a directory. */
390 #ifndef S_ISDIR
391 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
392 #endif
394 /* Test if something is a character special file. */
395 #ifndef S_ISCHR
396 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
397 #endif
399 /* Test if something is a block special file. */
400 #ifndef S_ISBLK
401 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
402 #endif
404 /* Test if something is a socket. */
405 #ifndef S_ISSOCK
406 # ifdef S_IFSOCK
407 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
408 # else
409 # define S_ISSOCK(m) 0
410 # endif
411 #endif
413 /* Test if something is a FIFO. */
414 #ifndef S_ISFIFO
415 # ifdef S_IFIFO
416 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
417 # else
418 # define S_ISFIFO(m) 0
419 # endif
420 #endif
422 /* Approximate O_NONBLOCK. */
423 #ifndef O_NONBLOCK
424 #define O_NONBLOCK O_NDELAY
425 #endif
427 /* Approximate O_NOCTTY. */
428 #ifndef O_NOCTTY
429 #define O_NOCTTY 0
430 #endif
432 /* Define well known filenos if the system does not define them. */
433 #ifndef STDIN_FILENO
434 # define STDIN_FILENO 0
435 #endif
436 #ifndef STDOUT_FILENO
437 # define STDOUT_FILENO 1
438 #endif
439 #ifndef STDERR_FILENO
440 # define STDERR_FILENO 2
441 #endif
443 /* Some systems have mkdir that takes a single argument. */
444 #ifdef MKDIR_TAKES_ONE_ARG
445 # define mkdir(a,b) mkdir(a)
446 #endif
448 /* Provide a way to print an address via printf. */
449 #ifndef HOST_PTR_PRINTF
450 # ifdef HAVE_PRINTF_PTR
451 # define HOST_PTR_PRINTF "%p"
452 # else
453 # define HOST_PTR_PRINTF \
454 (sizeof (int) == sizeof (char *) ? "%x" \
455 : sizeof (long) == sizeof (char *) ? "%lx" : "%llx")
456 # endif
457 #endif /* ! HOST_PTR_PRINTF */
459 /* By default, colon separates directories in a path. */
460 #ifndef PATH_SEPARATOR
461 #define PATH_SEPARATOR ':'
462 #endif
464 #ifndef DIR_SEPARATOR
465 #define DIR_SEPARATOR '/'
466 #endif
468 /* Define IS_DIR_SEPARATOR. */
469 #ifndef DIR_SEPARATOR_2
470 # define IS_DIR_SEPARATOR(CH) ((CH) == DIR_SEPARATOR)
471 #else /* DIR_SEPARATOR_2 */
472 # define IS_DIR_SEPARATOR(CH) \
473 (((CH) == DIR_SEPARATOR) || ((CH) == DIR_SEPARATOR_2))
474 #endif /* DIR_SEPARATOR_2 */
476 /* Say how to test for an absolute pathname. On Unix systems, this is if
477 it starts with a leading slash or a '$', the latter meaning the value of
478 an environment variable is to be used. On machien with DOS-based
479 file systems, it is also absolute if it starts with a drive identifier. */
480 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
481 #define IS_ABSOLUTE_PATHNAME(STR) \
482 (IS_DIR_SEPARATOR ((STR)[0]) || (STR)[0] == '$' \
483 || ((STR)[0] != '\0' && (STR)[1] == ':' && IS_DIR_SEPARATOR ((STR)[2])))
484 #else
485 #define IS_ABSOLUTE_PATHNAME(STR) \
486 (IS_DIR_SEPARATOR ((STR)[0]) || (STR)[0] == '$')
487 #endif
489 /* Get libiberty declarations. */
490 #include "libiberty.h"
491 #include "symcat.h"
493 /* Provide a default for the HOST_BIT_BUCKET.
494 This suffices for POSIX-like hosts. */
496 #ifndef HOST_BIT_BUCKET
497 #define HOST_BIT_BUCKET "/dev/null"
498 #endif
500 /* Be conservative and only use enum bitfields with GCC.
501 FIXME: provide a complete autoconf test for buggy enum bitfields. */
503 #if (GCC_VERSION > 2000)
504 #define ENUM_BITFIELD(TYPE) enum TYPE
505 #else
506 #define ENUM_BITFIELD(TYPE) unsigned int
507 #endif
509 #ifndef offsetof
510 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
511 #endif
513 /* Traditional C cannot initialize union members of structs. Provide
514 a macro which expands appropriately to handle it. This only works
515 if you intend to initialize the union member to zero since it relies
516 on default initialization to zero in the traditional C case. */
517 #ifdef __STDC__
518 #define UNION_INIT_ZERO , {0}
519 #else
520 #define UNION_INIT_ZERO
521 #endif
523 /* Various error reporting routines want to use __FUNCTION__. */
524 #if (GCC_VERSION < 2007)
525 #ifndef __FUNCTION__
526 #define __FUNCTION__ "?"
527 #endif /* ! __FUNCTION__ */
528 #endif
530 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
531 the most likely value of A is B. This feature was added at some point
532 between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */
533 #if (GCC_VERSION < 3000)
534 #define __builtin_expect(a, b) (a)
535 #endif
537 /* Provide some sort of boolean type. We use stdbool.h if it's
538 available. This must be after all inclusion of system headers,
539 as some of them will mess us up. */
540 #undef bool
541 #undef true
542 #undef false
543 #undef TRUE
544 #undef FALSE
546 #ifdef HAVE_STDBOOL_H
547 # include <stdbool.h>
548 #else
549 # if !HAVE__BOOL
550 typedef char _Bool;
551 # endif
552 # define bool _Bool
553 # define true 1
554 # define false 0
555 #endif
557 #define TRUE true
558 #define FALSE false
560 /* As the last action in this file, we poison the identifiers that
561 shouldn't be used. Note, luckily gcc-3.0's token-based integrated
562 preprocessor won't trip on poisoned identifiers that arrive from
563 the expansion of macros. E.g. #define strrchr rindex, won't error
564 if rindex is poisoned after this directive is issued and later on
565 strrchr is called.
567 Note: We define bypass macros for the few cases where we really
568 want to use the libc memory allocation routines. Otherwise we
569 insist you use the "x" versions from libiberty. */
571 #define really_call_malloc malloc
572 #define really_call_calloc calloc
573 #define really_call_realloc realloc
575 #if (GCC_VERSION >= 3000)
577 /* Note autoconf checks for prototype declarations and includes
578 system.h while doing so. Only poison these tokens if actually
579 compiling gcc, so that the autoconf declaration tests for malloc
580 etc don't spuriously fail. */
581 #ifdef IN_GCC
582 #undef malloc
583 #undef realloc
584 #undef calloc
585 #undef strdup
586 #pragma GCC poison malloc realloc calloc strdup
588 /* Old target macros that have moved to the target hooks structure. */
589 #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN \
590 FUNCTION_PROLOGUE FUNCTION_EPILOGUE \
591 FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE \
592 DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES \
593 VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE \
594 SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES \
595 MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES \
596 MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR \
597 ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC
599 /* And other obsolete target macros, or macros that used to be in target
600 headers and were not used, and may be obsolete or may never have
601 been used. */
602 #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG \
603 ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT \
604 DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
605 OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR \
606 LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC \
607 STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE \
608 SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH \
609 BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER \
610 FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE \
611 MACHINE_STATE_RESTORE
613 #endif /* IN_GCC */
615 /* Note: not all uses of the `index' token (e.g. variable names and
616 structure members) have been eliminated. */
617 #undef bcopy
618 #undef bzero
619 #undef bcmp
620 #undef rindex
621 #pragma GCC poison bcopy bzero bcmp rindex
623 #endif /* GCC >= 3.0 */
625 #endif /* ! GCC_SYSTEM_H */