1 /* Get common system includes and various definitions and declarations based 2 on autoconf macros. 3 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 4 2009, 2010 5 Free Software Foundation, Inc. 6 7 This file is part of GCC. 8 9 GCC is free software; you can redistribute it and/or modify it under 10 the terms of the GNU General Public License as published by the Free 11 Software Foundation; either version 3, or (at your option) any later 12 version. 13 14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 15 WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GCC; see the file COPYING3. If not see 21 <http://www.gnu.org/licenses/>. */ 22 23 24 #ifndef GCC_SYSTEM_H 25 #define GCC_SYSTEM_H 26 27 /* We must include stdarg.h before stdio.h. */ 28 #include <stdarg.h> 29 30 #ifndef va_copy 31 # ifdef __va_copy 32 # define va_copy(d,s) __va_copy((d),(s)) 33 # else 34 # define va_copy(d,s) ((d) = (s)) 35 # endif 36 #endif 37 38 #ifdef HAVE_STDDEF_H 39 # include <stddef.h> 40 #endif 41 42 #include <stdio.h> 43 44 /* Define a generic NULL if one hasn't already been defined. */ 45 #ifndef NULL 46 #define NULL 0 47 #endif 48 49 /* Use the unlocked open routines from libiberty. */ 50 #ifdef fopen /* fopen is a #define on VMS. */ 51 #undef fopen 52 #endif 53 #define fopen(PATH,MODE) fopen_unlocked(PATH,MODE) 54 #define fdopen(FILDES,MODE) fdopen_unlocked(FILDES,MODE) 55 #define freopen(PATH,MODE,STREAM) freopen_unlocked(PATH,MODE,STREAM) 56 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). 61 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. 65 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). */ 69 70 #if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED 71 72 # ifdef HAVE_PUTC_UNLOCKED 73 # undef putc 74 # define putc(C, Stream) putc_unlocked (C, Stream) 75 # endif 76 # ifdef HAVE_PUTCHAR_UNLOCKED 77 # undef putchar 78 # define putchar(C) putchar_unlocked (C) 79 # endif 80 # ifdef HAVE_GETC_UNLOCKED 81 # undef getc 82 # define getc(Stream) getc_unlocked (Stream) 83 # endif 84 # ifdef HAVE_GETCHAR_UNLOCKED 85 # undef getchar 86 # define getchar() getchar_unlocked () 87 # endif 88 # ifdef HAVE_FPUTC_UNLOCKED 89 # undef fputc 90 # define fputc(C, Stream) fputc_unlocked (C, Stream) 91 # endif 92 93 # ifdef HAVE_CLEARERR_UNLOCKED 94 # undef clearerr 95 # define clearerr(Stream) clearerr_unlocked (Stream) 96 # if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED 97 extern void clearerr_unlocked (FILE *); 98 # endif 99 # endif 100 # ifdef HAVE_FEOF_UNLOCKED 101 # undef feof 102 # define feof(Stream) feof_unlocked (Stream) 103 # if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED 104 extern int feof_unlocked (FILE *); 105 # endif 106 # endif 107 # ifdef HAVE_FILENO_UNLOCKED 108 # undef fileno 109 # define fileno(Stream) fileno_unlocked (Stream) 110 # if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED 111 extern int fileno_unlocked (FILE *); 112 # endif 113 # endif 114 # ifdef HAVE_FFLUSH_UNLOCKED 115 # undef fflush 116 # define fflush(Stream) fflush_unlocked (Stream) 117 # if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED 118 extern int fflush_unlocked (FILE *); 119 # endif 120 # endif 121 # ifdef HAVE_FGETC_UNLOCKED 122 # undef fgetc 123 # define fgetc(Stream) fgetc_unlocked (Stream) 124 # if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED 125 extern int fgetc_unlocked (FILE *); 126 # endif 127 # endif 128 # ifdef HAVE_FGETS_UNLOCKED 129 # undef fgets 130 # define fgets(S, n, Stream) fgets_unlocked (S, n, Stream) 131 # if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED 132 extern char *fgets_unlocked (char *, int, FILE *); 133 # endif 134 # endif 135 # ifdef HAVE_FPUTS_UNLOCKED 136 # undef fputs 137 # define fputs(String, Stream) fputs_unlocked (String, Stream) 138 # if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED 139 extern int fputs_unlocked (const char *, FILE *); 140 # endif 141 # endif 142 # ifdef HAVE_FERROR_UNLOCKED 143 # undef ferror 144 # define ferror(Stream) ferror_unlocked (Stream) 145 # if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED 146 extern int ferror_unlocked (FILE *); 147 # endif 148 # endif 149 # ifdef HAVE_FREAD_UNLOCKED 150 # undef fread 151 # define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream) 152 # if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED 153 extern size_t fread_unlocked (void *, size_t, size_t, FILE *); 154 # endif 155 # endif 156 # ifdef HAVE_FWRITE_UNLOCKED 157 # undef fwrite 158 # define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream) 159 # if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED 160 extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *); 161 # endif 162 # endif 163 # ifdef HAVE_FPRINTF_UNLOCKED 164 # undef fprintf 165 /* We can't use a function-like macro here because we don't know if 166 we have varargs macros. */ 167 # define fprintf fprintf_unlocked 168 # if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED 169 extern int fprintf_unlocked (FILE *, const char *, ...); 170 # endif 171 # endif 172 173 #endif 174 175 /* ??? Glibc's fwrite/fread_unlocked macros cause 176 "warning: signed and unsigned type in conditional expression". */ 177 #undef fread_unlocked 178 #undef fwrite_unlocked 179 180 /* There are an extraordinary number of issues with <ctype.h>. 181 The last straw is that it varies with the locale. Use libiberty's 182 replacement instead. */ 183 #include "safe-ctype.h" 184 185 #include <sys/types.h> 186 187 #include <errno.h> 188 189 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO 190 extern int errno; 191 #endif 192 193 #ifdef __cplusplus 194 # include <cstring> 195 #endif 196 197 /* Some of glibc's string inlines cause warnings. Plus we'd rather 198 rely on (and therefore test) GCC's string builtins. */ 199 #define __NO_STRING_INLINES 200 201 #ifdef STRING_WITH_STRINGS 202 # include <string.h> 203 # include <strings.h> 204 #else 205 # ifdef HAVE_STRING_H 206 # include <string.h> 207 # else 208 # ifdef HAVE_STRINGS_H 209 # include <strings.h> 210 # endif 211 # endif 212 #endif 213 214 #ifdef HAVE_STDLIB_H 215 # include <stdlib.h> 216 #endif 217 218 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and 219 FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively, 220 or 0 and 1 if those macros are not defined. */ 221 #ifndef SUCCESS_EXIT_CODE 222 # ifdef EXIT_SUCCESS 223 # define SUCCESS_EXIT_CODE EXIT_SUCCESS 224 # else 225 # define SUCCESS_EXIT_CODE 0 226 # endif 227 #endif 228 229 #ifndef FATAL_EXIT_CODE 230 # ifdef EXIT_FAILURE 231 # define FATAL_EXIT_CODE EXIT_FAILURE 232 # else 233 # define FATAL_EXIT_CODE 1 234 # endif 235 #endif 236 237 #define ICE_EXIT_CODE 4 238 239 #ifdef HAVE_UNISTD_H 240 # include <unistd.h> 241 #endif 242 243 #ifdef HAVE_SYS_PARAM_H 244 # include <sys/param.h> 245 /* We use this identifier later and it appears in some vendor param.h's. */ 246 # undef PREFETCH 247 #endif 248 249 #if HAVE_LIMITS_H 250 # include <limits.h> 251 #endif 252 253 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT. */ 254 #include "hwint.h" 255 256 /* A macro to determine whether a VALUE lies inclusively within a 257 certain range without evaluating the VALUE more than once. This 258 macro won't warn if the VALUE is unsigned and the LOWER bound is 259 zero, as it would e.g. with "VALUE >= 0 && ...". Note the LOWER 260 bound *is* evaluated twice, and LOWER must not be greater than 261 UPPER. However the bounds themselves can be either positive or 262 negative. */ 263 #define IN_RANGE(VALUE, LOWER, UPPER) \ 264 ((unsigned HOST_WIDE_INT) (VALUE) - (unsigned HOST_WIDE_INT) (LOWER) \ 265 <= (unsigned HOST_WIDE_INT) (UPPER) - (unsigned HOST_WIDE_INT) (LOWER)) 266 267 /* Infrastructure for defining missing _MAX and _MIN macros. Note that 268 macros defined with these cannot be used in #if. */ 269 270 /* The extra casts work around common compiler bugs. */ 271 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1)) 272 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0. 273 It is necessary at least when t == time_t. */ 274 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \ 275 ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0)) 276 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t))) 277 278 /* Use that infrastructure to provide a few constants. */ 279 #ifndef UCHAR_MAX 280 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char) 281 #endif 282 283 #ifdef TIME_WITH_SYS_TIME 284 # include <sys/time.h> 285 # include <time.h> 286 #else 287 # if HAVE_SYS_TIME_H 288 # include <sys/time.h> 289 # else 290 # ifdef HAVE_TIME_H 291 # include <time.h> 292 # endif 293 # endif 294 #endif 295 296 #ifdef HAVE_FCNTL_H 297 # include <fcntl.h> 298 #else 299 # ifdef HAVE_SYS_FILE_H 300 # include <sys/file.h> 301 # endif 302 #endif 303 304 #ifndef SEEK_SET 305 # define SEEK_SET 0 306 # define SEEK_CUR 1 307 # define SEEK_END 2 308 #endif 309 #ifndef F_OK 310 # define F_OK 0 311 # define X_OK 1 312 # define W_OK 2 313 # define R_OK 4 314 #endif 315 #ifndef O_RDONLY 316 # define O_RDONLY 0 317 #endif 318 #ifndef O_WRONLY 319 # define O_WRONLY 1 320 #endif 321 #ifndef O_BINARY 322 # define O_BINARY 0 323 #endif 324 325 /* Some systems define these in, e.g., param.h. We undefine these names 326 here to avoid the warnings. We prefer to use our definitions since we 327 know they are correct. */ 328 329 #undef MIN 330 #undef MAX 331 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) 332 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y)) 333 334 /* Returns the least number N such that N * Y >= X. */ 335 #define CEIL(x,y) (((x) + (y) - 1) / (y)) 336 337 #ifdef HAVE_SYS_WAIT_H 338 #include <sys/wait.h> 339 #endif 340 341 #ifndef WIFSIGNALED 342 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f) 343 #endif 344 #ifndef WTERMSIG 345 #define WTERMSIG(S) ((S) & 0x7f) 346 #endif 347 #ifndef WIFEXITED 348 #define WIFEXITED(S) (((S) & 0xff) == 0) 349 #endif 350 #ifndef WEXITSTATUS 351 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8) 352 #endif 353 #ifndef WSTOPSIG 354 #define WSTOPSIG WEXITSTATUS 355 #endif 356 #ifndef WCOREDUMP 357 #define WCOREDUMP(S) ((S) & WCOREFLG) 358 #endif 359 #ifndef WCOREFLG 360 #define WCOREFLG 0200 361 #endif 362 363 #include <signal.h> 364 #if !defined (SIGCHLD) && defined (SIGCLD) 365 # define SIGCHLD SIGCLD 366 #endif 367 368 #ifdef HAVE_SYS_MMAN_H 369 # include <sys/mman.h> 370 #endif 371 372 #ifndef MAP_FAILED 373 # define MAP_FAILED ((void *)-1) 374 #endif 375 376 #if !defined (MAP_ANONYMOUS) && defined (MAP_ANON) 377 # define MAP_ANONYMOUS MAP_ANON 378 #endif 379 380 #ifdef HAVE_SYS_RESOURCE_H 381 # include <sys/resource.h> 382 #endif 383 384 #ifdef HAVE_SYS_TIMES_H 385 # include <sys/times.h> 386 #endif 387 388 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1. If they 389 are defined to 0 then we must provide the relevant declaration 390 here. These checks will be in the undefined state while configure 391 is running so be careful to test "defined (HAVE_DECL_*)". */ 392 393 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF 394 extern double atof (const char *); 395 #endif 396 397 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL 398 extern long atol (const char *); 399 #endif 400 401 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE 402 extern void free (void *); 403 #endif 404 405 #if defined (HAVE_DECL_GETCWD) && !HAVE_DECL_GETCWD 406 extern char *getcwd (char *, size_t); 407 #endif 408 409 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV 410 extern char *getenv (const char *); 411 #endif 412 413 #if defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT 414 extern int getopt (int, char * const *, const char *); 415 #endif 416 417 #if defined (HAVE_DECL_GETPAGESIZE) && !HAVE_DECL_GETPAGESIZE 418 extern int getpagesize (void); 419 #endif 420 421 #if defined (HAVE_DECL_GETWD) && !HAVE_DECL_GETWD 422 extern char *getwd (char *); 423 #endif 424 425 #if defined (HAVE_DECL_SBRK) && !HAVE_DECL_SBRK 426 extern void *sbrk (int); 427 #endif 428 429 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR 430 extern char *strstr (const char *, const char *); 431 #endif 432 433 #ifdef HAVE_MALLOC_H 434 #include <malloc.h> 435 #endif 436 437 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC 438 extern void *malloc (size_t); 439 #endif 440 441 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC 442 extern void *calloc (size_t, size_t); 443 #endif 444 445 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC 446 extern void *realloc (void *, size_t); 447 #endif 448 449 #ifdef HAVE_STDINT_H 450 #include <stdint.h> 451 #endif 452 453 #ifdef HAVE_INTTYPES_H 454 #include <inttypes.h> 455 #endif 456 457 /* If the system doesn't provide strsignal, we get it defined in 458 libiberty but no declaration is supplied. */ 459 #if !defined (HAVE_STRSIGNAL) \ 460 || (defined (HAVE_DECL_STRSIGNAL) && !HAVE_DECL_STRSIGNAL) 461 # ifndef strsignal 462 extern const char *strsignal (int); 463 # endif 464 #endif 465 466 #ifdef HAVE_GETRLIMIT 467 # if defined (HAVE_DECL_GETRLIMIT) && !HAVE_DECL_GETRLIMIT 468 # ifndef getrlimit 469 struct rlimit; 470 extern int getrlimit (int, struct rlimit *); 471 # endif 472 # endif 473 #endif 474 475 #ifdef HAVE_SETRLIMIT 476 # if defined (HAVE_DECL_SETRLIMIT) && !HAVE_DECL_SETRLIMIT 477 # ifndef setrlimit 478 struct rlimit; 479 extern int setrlimit (int, const struct rlimit *); 480 # endif 481 # endif 482 #endif 483 484 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT 485 extern void abort (void); 486 #endif 487 488 #if defined (HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF 489 extern int snprintf (char *, size_t, const char *, ...); 490 #endif 491 492 #if defined (HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF 493 extern int vsnprintf(char *, size_t, const char *, va_list); 494 #endif 495 496 /* 1 if we have C99 designated initializers. */ 497 #if !defined(HAVE_DESIGNATED_INITIALIZERS) 498 #define HAVE_DESIGNATED_INITIALIZERS \ 499 (((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)) \ 500 && !defined(__cplusplus)) 501 #endif 502 503 #if HAVE_SYS_STAT_H 504 # include <sys/stat.h> 505 #endif 506 507 /* Test if something is a normal file. */ 508 #ifndef S_ISREG 509 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) 510 #endif 511 512 /* Test if something is a directory. */ 513 #ifndef S_ISDIR 514 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) 515 #endif 516 517 /* Test if something is a character special file. */ 518 #ifndef S_ISCHR 519 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) 520 #endif 521 522 /* Test if something is a block special file. */ 523 #ifndef S_ISBLK 524 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) 525 #endif 526 527 /* Test if something is a socket. */ 528 #ifndef S_ISSOCK 529 # ifdef S_IFSOCK 530 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) 531 # else 532 # define S_ISSOCK(m) 0 533 # endif 534 #endif 535 536 /* Test if something is a FIFO. */ 537 #ifndef S_ISFIFO 538 # ifdef S_IFIFO 539 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) 540 # else 541 # define S_ISFIFO(m) 0 542 # endif 543 #endif 544 545 /* Define well known filenos if the system does not define them. */ 546 #ifndef STDIN_FILENO 547 # define STDIN_FILENO 0 548 #endif 549 #ifndef STDOUT_FILENO 550 # define STDOUT_FILENO 1 551 #endif 552 #ifndef STDERR_FILENO 553 # define STDERR_FILENO 2 554 #endif 555 556 /* Some systems have mkdir that takes a single argument. */ 557 #ifdef MKDIR_TAKES_ONE_ARG 558 # define mkdir(a,b) mkdir(a) 559 #endif 560 561 #ifndef HAVE_KILL 562 # define kill(p,s) raise(s) 563 #endif 564 565 /* Provide a way to print an address via printf. */ 566 #ifndef HOST_PTR_PRINTF 567 #define HOST_PTR_PRINTF "%p" 568 #endif /* ! HOST_PTR_PRINTF */ 569 570 /* By default, colon separates directories in a path. */ 571 #ifndef PATH_SEPARATOR 572 #define PATH_SEPARATOR ':' 573 #endif 574 575 /* Filename handling macros. */ 576 #include "filenames.h" 577 578 /* These should be phased out in favor of IS_DIR_SEPARATOR, where possible. */ 579 #ifndef DIR_SEPARATOR 580 # define DIR_SEPARATOR '/' 581 # ifdef HAVE_DOS_BASED_FILE_SYSTEM 582 # define DIR_SEPARATOR_2 '\\' 583 # endif 584 #endif 585 586 #if defined (ENABLE_PLUGIN) && defined (HAVE_DLFCN_H) 587 /* If plugin support is enabled, we could use libdl. */ 588 #include <dlfcn.h> 589 #endif 590 591 /* Get libiberty declarations. */ 592 #include "libiberty.h" 593 594 /* Provide a default for the HOST_BIT_BUCKET. 595 This suffices for POSIX-like hosts. */ 596 597 #ifndef HOST_BIT_BUCKET 598 #define HOST_BIT_BUCKET "/dev/null" 599 #endif 600 601 /* Be conservative and only use enum bitfields with GCC. 602 FIXME: provide a complete autoconf test for buggy enum bitfields. */ 603 604 #if (GCC_VERSION > 2000) 605 #define ENUM_BITFIELD(TYPE) __extension__ enum TYPE 606 #else 607 #define ENUM_BITFIELD(TYPE) unsigned int 608 #endif 609 610 #ifndef offsetof 611 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER) 612 #endif 613 614 /* Various error reporting routines want to use __FUNCTION__. */ 615 #if (GCC_VERSION < 2007) 616 #ifndef __FUNCTION__ 617 #define __FUNCTION__ "?" 618 #endif /* ! __FUNCTION__ */ 619 #endif 620 621 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that 622 the most likely value of A is B. This feature was added at some point 623 between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */ 624 #if (GCC_VERSION < 3000) 625 #define __builtin_expect(a, b) (a) 626 #endif 627 628 /* Redefine abort to report an internal error w/o coredump, and 629 reporting the location of the error in the source file. */ 630 extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; 631 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__) 632 633 /* Use gcc_assert(EXPR) to test invariants. */ 634 #if ENABLE_ASSERT_CHECKING 635 #define gcc_assert(EXPR) \ 636 ((void)(!(EXPR) ? fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0 : 0)) 637 #elif (GCC_VERSION >= 4005) 638 #define gcc_assert(EXPR) \ 639 ((void)(__builtin_expect(!(EXPR), 0) ? __builtin_unreachable(), 0 : 0)) 640 #else 641 /* Include EXPR, so that unused variable warnings do not occur. */ 642 #define gcc_assert(EXPR) ((void)(0 && (EXPR))) 643 #endif 644 645 #ifdef ENABLE_CHECKING 646 #define gcc_checking_assert(EXPR) gcc_assert (EXPR) 647 #else 648 #define gcc_checking_assert(EXPR) ((void)(0 && (EXPR))) 649 #endif 650 651 /* Use gcc_unreachable() to mark unreachable locations (like an 652 unreachable default case of a switch. Do not use gcc_assert(0). */ 653 #if (GCC_VERSION >= 4005) && !ENABLE_ASSERT_CHECKING 654 #define gcc_unreachable() __builtin_unreachable() 655 #else 656 #define gcc_unreachable() (fancy_abort (__FILE__, __LINE__, __FUNCTION__)) 657 #endif 658 659 /* Provide a fake boolean type. We make no attempt to use the 660 C99 _Bool, as it may not be available in the bootstrap compiler, 661 and even if it is, it is liable to be buggy. 662 This must be after all inclusion of system headers, as some of 663 them will mess us up. */ 664 665 #undef TRUE 666 #undef FALSE 667 668 #ifdef __cplusplus 669 /* Obsolete. */ 670 # define TRUE true 671 # define FALSE false 672 #else /* !__cplusplus */ 673 # undef bool 674 # undef true 675 # undef false 676 677 # define bool unsigned char 678 # define true 1 679 # define false 0 680 681 /* Obsolete. */ 682 # define TRUE true 683 # define FALSE false 684 #endif /* !__cplusplus */ 685 686 /* Some compilers do not allow the use of unsigned char in bitfields. */ 687 #define BOOL_BITFIELD unsigned int 688 689 /* As the last action in this file, we poison the identifiers that 690 shouldn't be used. Note, luckily gcc-3.0's token-based integrated 691 preprocessor won't trip on poisoned identifiers that arrive from 692 the expansion of macros. E.g. #define strrchr rindex, won't error 693 if rindex is poisoned after this directive is issued and later on 694 strrchr is called. 695 696 Note: We define bypass macros for the few cases where we really 697 want to use the libc memory allocation routines. Otherwise we 698 insist you use the "x" versions from libiberty. */ 699 700 #define really_call_malloc malloc 701 #define really_call_calloc calloc 702 #define really_call_realloc realloc 703 704 #if defined(FLEX_SCANNER) || defined(YYBISON) || defined(YYBYACC) 705 /* Flex and bison use malloc and realloc. Yuk. Note that this means 706 really_call_* cannot be used in a .l or .y file. */ 707 #define malloc xmalloc 708 #define realloc xrealloc 709 #endif 710 711 #if (GCC_VERSION >= 3000) 712 713 /* Note autoconf checks for prototype declarations and includes 714 system.h while doing so. Only poison these tokens if actually 715 compiling gcc, so that the autoconf declaration tests for malloc 716 etc don't spuriously fail. */ 717 #ifdef IN_GCC 718 #undef calloc 719 #undef strdup 720 #pragma GCC poison calloc strdup 721 722 #if !defined(FLEX_SCANNER) && !defined(YYBISON) 723 #undef malloc 724 #undef realloc 725 #pragma GCC poison malloc realloc 726 #endif 727 728 /* The %m format should be used when GCC's main diagnostic functions 729 supporting %m are available, and xstrerror from libiberty 730 otherwise. */ 731 #undef strerror 732 #pragma GCC poison strerror 733 734 /* Old target macros that have moved to the target hooks structure. */ 735 #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN \ 736 FUNCTION_PROLOGUE FUNCTION_EPILOGUE \ 737 FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE \ 738 DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES \ 739 VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE \ 740 SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES \ 741 MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES \ 742 MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR \ 743 ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE \ 744 WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \ 745 ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL \ 746 ASM_OUTPUT_MI_THUNK CONST_COSTS RTX_COSTS DEFAULT_RTX_COSTS \ 747 ADDRESS_COST MACHINE_DEPENDENT_REORG ASM_FILE_START ASM_FILE_END \ 748 ASM_SIMPLIFY_DWARF_ADDR INIT_TARGET_OPTABS INIT_SUBTARGET_OPTABS \ 749 INIT_GOFAST_OPTABS MULSI3_LIBCALL MULDI3_LIBCALL DIVSI3_LIBCALL \ 750 DIVDI3_LIBCALL UDIVSI3_LIBCALL UDIVDI3_LIBCALL MODSI3_LIBCALL \ 751 MODDI3_LIBCALL UMODSI3_LIBCALL UMODDI3_LIBCALL BUILD_VA_LIST_TYPE \ 752 PRETEND_OUTGOING_VARARGS_NAMED STRUCT_VALUE_INCOMING_REGNUM \ 753 ASM_OUTPUT_SECTION_NAME PROMOTE_FUNCTION_ARGS PROMOTE_FUNCTION_MODE \ 754 STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING \ 755 PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM \ 756 SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS \ 757 DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS \ 758 HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX \ 759 MUST_PASS_IN_STACK FUNCTION_ARG_PASS_BY_REFERENCE \ 760 VECTOR_MODE_SUPPORTED_P TARGET_SUPPORTS_HIDDEN \ 761 FUNCTION_ARG_PARTIAL_NREGS ASM_OUTPUT_DWARF_DTPREL \ 762 ALLOCATE_INITIAL_VALUE LEGITIMIZE_ADDRESS FRAME_POINTER_REQUIRED \ 763 CAN_ELIMINATE TRAMPOLINE_TEMPLATE INITIALIZE_TRAMPOLINE \ 764 TRAMPOLINE_ADJUST_ADDRESS STATIC_CHAIN STATIC_CHAIN_INCOMING \ 765 RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS \ 766 OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P \ 767 USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO \ 768 LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP \ 769 LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP \ 770 CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME \ 771 HOT_TEXT_SECTION_NAME 772 773 /* Other obsolete target macros, or macros that used to be in target 774 headers and were not used, and may be obsolete or may never have 775 been used. */ 776 #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG CPP_PREDEFINES \ 777 ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT SMALL_STACK \ 778 DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \ 779 OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR \ 780 LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC \ 781 STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE \ 782 SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH \ 783 TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE \ 784 NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \ 785 BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER \ 786 FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE \ 787 MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP BYTEORDER \ 788 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL HOST_WORDS_BIG_ENDIAN \ 789 OBJC_PROLOGUE ALLOCATE_TRAMPOLINE HANDLE_PRAGMA ROUND_TYPE_SIZE \ 790 ROUND_TYPE_SIZE_UNIT CONST_SECTION_ASM_OP CRT_GET_RFIB_TEXT \ 791 DBX_LBRAC_FIRST DBX_OUTPUT_ENUM DBX_OUTPUT_SOURCE_FILENAME \ 792 DBX_WORKING_DIRECTORY INSN_CACHE_DEPTH INSN_CACHE_SIZE \ 793 INSN_CACHE_LINE_WIDTH INIT_SECTION_PREAMBLE NEED_ATEXIT ON_EXIT \ 794 EXIT_BODY OBJECT_FORMAT_ROSE MULTIBYTE_CHARS MAP_CHARACTER \ 795 LIBGCC_NEEDS_DOUBLE FINAL_PRESCAN_LABEL DEFAULT_CALLER_SAVES \ 796 LOAD_ARGS_REVERSED MAX_INTEGER_COMPUTATION_MODE \ 797 CONVERT_HARD_REGISTER_TO_SSA_P ASM_OUTPUT_MAIN_SOURCE_FILENAME \ 798 FIRST_INSN_ADDRESS TEXT_SECTION SHARED_BSS_SECTION_ASM_OP \ 799 PROMOTED_MODE EXPAND_BUILTIN_VA_END \ 800 LINKER_DOES_NOT_WORK_WITH_DWARF2 FUNCTION_ARG_KEEP_AS_REFERENCE \ 801 GIV_SORT_CRITERION MAX_LONG_TYPE_SIZE MAX_LONG_DOUBLE_TYPE_SIZE \ 802 MAX_WCHAR_TYPE_SIZE SHARED_SECTION_ASM_OP INTEGRATE_THRESHOLD \ 803 FINAL_REG_PARM_STACK_SPACE MAYBE_REG_PARM_STACK_SPACE \ 804 TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE \ 805 DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE \ 806 SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY \ 807 SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE \ 808 DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS EXPAND_BUILTIN_VA_ARG \ 809 COLLECT_PARSE_FLAG DWARF2_GENERATE_TEXT_SECTION_LABEL WINNING_GDB \ 810 ASM_OUTPUT_FILENAME ASM_OUTPUT_SOURCE_LINE FILE_NAME_JOINER \ 811 GDB_INV_REF_REGPARM_STABS_LETTER DBX_MEMPARM_STABS_LETTER \ 812 PUT_SDB_SRC_FILE STABS_GCC_MARKER DBX_OUTPUT_FUNCTION_END \ 813 DBX_OUTPUT_GCC_MARKER DBX_FINISH_SYMBOL SDB_GENERATE_FAKE \ 814 NON_SAVING_SETJMP TARGET_LATE_RTL_PROLOGUE_EPILOGUE \ 815 CASE_DROPS_THROUGH TARGET_BELL TARGET_BS TARGET_CR TARGET_DIGIT0 \ 816 TARGET_ESC TARGET_FF TARGET_NEWLINE TARGET_TAB TARGET_VT \ 817 LINK_LIBGCC_SPECIAL DONT_ACCESS_GBLS_AFTER_EPILOGUE \ 818 TARGET_OPTIONS TARGET_SWITCHES EXTRA_CC_MODES FINALIZE_PIC \ 819 PREDICATE_CODES SPECIAL_MODE_PREDICATES UNALIGNED_WORD_ASM_OP \ 820 EXTRA_SECTIONS EXTRA_SECTION_FUNCTIONS READONLY_DATA_SECTION \ 821 TARGET_ASM_EXCEPTION_SECTION TARGET_ASM_EH_FRAME_SECTION \ 822 SMALL_ARG_MAX ASM_OUTPUT_SHARED_BSS ASM_OUTPUT_SHARED_COMMON \ 823 ASM_OUTPUT_SHARED_LOCAL ASM_MAKE_LABEL_LINKONCE \ 824 STACK_CHECK_PROBE_INTERVAL STACK_CHECK_PROBE_LOAD \ 825 ORDER_REGS_FOR_LOCAL_ALLOC FUNCTION_OUTGOING_VALUE \ 826 ASM_DECLARE_CONSTANT_NAME MODIFY_TARGET_NAME SWITCHES_NEED_SPACES \ 827 SWITCH_CURTAILS_COMPILATION SWITCH_TAKES_ARG WORD_SWITCH_TAKES_ARG \ 828 TARGET_OPTION_TRANSLATE_TABLE HANDLE_PRAGMA_PACK_PUSH_POP \ 829 HANDLE_SYSV_PRAGMA HANDLE_PRAGMA_WEAK CONDITIONAL_REGISTER_USAGE \ 830 FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST \ 831 USING_SVR4_H SVR4_ASM_SPEC 832 833 /* Hooks that are no longer used. */ 834 #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE \ 835 LANG_HOOKS_MARK_TREE LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES \ 836 LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS \ 837 LANG_HOOKS_PUSHLEVEL LANG_HOOKS_SET_BLOCK \ 838 LANG_HOOKS_MAYBE_BUILD_CLEANUP LANG_HOOKS_UPDATE_DECL_AFTER_SAVING \ 839 LANG_HOOKS_POPLEVEL LANG_HOOKS_TRUTHVALUE_CONVERSION \ 840 TARGET_PROMOTE_FUNCTION_ARGS TARGET_PROMOTE_FUNCTION_RETURN \ 841 LANG_HOOKS_MISSING_ARGUMENT LANG_HOOKS_HASH_TYPES \ 842 TARGET_HANDLE_OFAST TARGET_OPTION_OPTIMIZATION 843 844 /* Hooks into libgcc2. */ 845 #pragma GCC poison LIBGCC2_DOUBLE_TYPE_SIZE LIBGCC2_WORDS_BIG_ENDIAN \ 846 LIBGCC2_FLOAT_WORDS_BIG_ENDIAN 847 848 /* Miscellaneous macros that are no longer used. */ 849 #pragma GCC poison USE_MAPPED_LOCATION GET_ENVIRONMENT 850 851 /* Libiberty macros that are no longer used in GCC. */ 852 #undef ANSI_PROTOTYPES 853 #undef PTR_CONST 854 #undef LONG_DOUBLE 855 #undef VPARAMS 856 #undef VA_OPEN 857 #undef VA_FIXEDARG 858 #undef VA_CLOSE 859 #undef VA_START 860 #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \ 861 VA_FIXEDARG VA_CLOSE VA_START 862 #endif /* IN_GCC */ 863 864 /* Front ends should never have to include middle-end headers. Enforce 865 this by poisoning the header double-include protection defines. */ 866 #ifdef IN_GCC_FRONTEND 867 #pragma GCC poison GCC_RTL_H GCC_EXCEPT_H GCC_EXPR_H 868 #endif 869 870 /* Note: not all uses of the `index' token (e.g. variable names and 871 structure members) have been eliminated. */ 872 #undef bcopy 873 #undef bzero 874 #undef bcmp 875 #undef rindex 876 #pragma GCC poison bcopy bzero bcmp rindex 877 878 #endif /* GCC >= 3.0 */ 879 880 /* This macro allows casting away const-ness to pass -Wcast-qual 881 warnings. DO NOT USE THIS UNLESS YOU REALLY HAVE TO! It should 882 only be used in certain specific cases. One valid case is where 883 the C standard definitions or prototypes force you to. E.g. if you 884 need to free a const object, or if you pass a const string to 885 execv, et al. Another valid use would be in an allocation function 886 that creates const objects that need to be initialized. In some 887 cases we have non-const functions that return the argument 888 (e.g. next_nonnote_insn). Rather than create const shadow 889 functions, we can cast away const-ness in calling these interfaces 890 if we're careful to verify that the called function does indeed not 891 modify its argument and the return value is only used in a const 892 context. (This can be somewhat dangerous as these assumptions can 893 change after the fact). Beyond these uses, most other cases of 894 using this macro should be viewed with extreme caution. */ 895 896 #ifdef __cplusplus 897 #define CONST_CAST2(TOTYPE,FROMTYPE,X) (const_cast<TOTYPE> (X)) 898 #else 899 #if defined(__GNUC__) && GCC_VERSION > 4000 900 /* GCC 4.0.x has a bug where it may ICE on this expression, 901 so does GCC 3.4.x (PR17436). */ 902 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((__extension__(union {FROMTYPE _q; TOTYPE _nq;})(X))._nq) 903 #elif defined(__GNUC__) 904 static inline char * 905 helper_const_non_const_cast (const char *p) 906 { 907 union { 908 const char *const_c; 909 char *c; 910 } val; 911 val.const_c = p; 912 return val.c; 913 } 914 915 #define CONST_CAST2(TOTYPE,FROMTYPE,X) \ 916 ((TOTYPE) helper_const_non_const_cast ((const char *) (FROMTYPE) (X))) 917 #else 918 #define CONST_CAST2(TOTYPE,FROMTYPE,X) ((TOTYPE)(FROMTYPE)(X)) 919 #endif 920 #endif 921 #define CONST_CAST(TYPE,X) CONST_CAST2(TYPE, const TYPE, (X)) 922 #define CONST_CAST_TREE(X) CONST_CAST(union tree_node *, (X)) 923 #define CONST_CAST_RTX(X) CONST_CAST(struct rtx_def *, (X)) 924 #define CONST_CAST_BB(X) CONST_CAST(struct basic_block_def *, (X)) 925 #define CONST_CAST_GIMPLE(X) CONST_CAST(union gimple_statement_d *, (X)) 926 927 /* Activate certain diagnostics as warnings (not errors via the 928 -Werror flag). */ 929 #if GCC_VERSION >= 4003 930 /* If asserts are disabled, activate -Wuninitialized as a warning (not 931 an error/-Werror). */ 932 #ifndef ENABLE_ASSERT_CHECKING 933 #pragma GCC diagnostic warning "-Wuninitialized" 934 #endif 935 #endif 936 937 #ifdef ENABLE_VALGRIND_CHECKING 938 # ifdef HAVE_VALGRIND_MEMCHECK_H 939 # include <valgrind/memcheck.h> 940 # elif defined HAVE_MEMCHECK_H 941 # include <memcheck.h> 942 # else 943 # include <valgrind.h> 944 # endif 945 /* Compatibility macros to let valgrind 3.1 work. */ 946 # ifndef VALGRIND_MAKE_MEM_NOACCESS 947 # define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS 948 # endif 949 # ifndef VALGRIND_MAKE_MEM_DEFINED 950 # define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE 951 # endif 952 # ifndef VALGRIND_MAKE_MEM_UNDEFINED 953 # define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE 954 # endif 955 #else 956 /* Avoid #ifdef:s when we can help it. */ 957 #define VALGRIND_DISCARD(x) 958 #define VALGRIND_MALLOCLIKE_BLOCK(w,x,y,z) 959 #define VALGRIND_FREELIKE_BLOCK(x,y) 960 #endif 961 962 /* In LTO -fwhole-program build we still want to keep the debug functions available 963 for debugger. Mark them as used to prevent removal. */ 964 #if (GCC_VERSION > 4000) 965 #define DEBUG_FUNCTION __attribute__ ((__used__)) 966 #define DEBUG_VARIABLE __attribute__ ((__used__)) 967 #else 968 #define DEBUG_FUNCTION 969 #define DEBUG_VARIABLE 970 #endif 971 972 #endif /* ! GCC_SYSTEM_H */ 973
