1 /* Get common system includes and various definitions and declarations based
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
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
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
28 /* We must include stdarg.h/varargs.h before stdio.h. */
29 #ifdef ANSI_PROTOTYPES
37 # define va_copy(d,s) __va_copy((d),(s))
39 # define va_copy(d,s) ((d) = (s))
51 /* Define a generic NULL if one hasn't already been defined. */
56 /* There are an extraordinary number of issues with <ctype.h>.
57 The last straw is that it varies with the locale. Use libiberty's
58 replacement instead. */
59 #if defined(__APPLE__) && defined(__MACH__)
60 #include <libiberty/safe-ctype.h>
62 #include <safe-ctype.h>
65 #include <sys/types.h>
69 #if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
73 #ifdef STRING_WITH_STRINGS
80 # ifdef HAVE_STRINGS_H
90 /* If we don't have an overriding definition, set SUCCESS_EXIT_CODE and
91 FATAL_EXIT_CODE to EXIT_SUCCESS and EXIT_FAILURE respectively,
92 or 0 and 1 if those macros are not defined. */
93 #ifndef SUCCESS_EXIT_CODE
95 # define SUCCESS_EXIT_CODE EXIT_SUCCESS
97 # define SUCCESS_EXIT_CODE 0
101 #ifndef FATAL_EXIT_CODE
103 # define FATAL_EXIT_CODE EXIT_FAILURE
105 # define FATAL_EXIT_CODE 1
113 #ifdef HAVE_SYS_PARAM_H
114 # include <sys/param.h>
115 /* We use this identifier later and it appears in some vendor param.h's. */
123 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT. */
126 /* A macro to determine whether a VALUE lies inclusively within a
127 certain range without evaluating the VALUE more than once. This
128 macro won't warn if the VALUE is unsigned and the LOWER bound is
129 zero, as it would e.g. with "VALUE >= 0 && ...". Note the LOWER
130 bound *is* evaluated twice, and LOWER must not be greater than
131 UPPER. However the bounds themselves can be either positive or
133 #define IN_RANGE(VALUE, LOWER, UPPER) \
134 ((unsigned HOST_WIDE_INT) ((VALUE) - (LOWER)) <= ((UPPER) - (LOWER)))
136 /* Infrastructure for defining missing _MAX and _MIN macros. Note that
137 macros defined with these cannot be used in #if. */
139 /* The extra casts work around common compiler bugs. */
140 #define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
141 /* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
142 It is necessary at least when t == time_t. */
143 #define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
144 ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
145 #define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
147 /* Use that infrastructure to provide a few constants. */
149 # define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
152 #ifdef TIME_WITH_SYS_TIME
153 # include <sys/time.h>
157 # include <sys/time.h>
168 # ifdef HAVE_SYS_FILE_H
169 # include <sys/file.h>
191 /* Some systems define these in, e.g., param.h. We undefine these names
192 here to avoid the warnings. We prefer to use our definitions since we
193 know they are correct. */
197 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
198 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
200 /* Returns the least number N such that N * Y >= X. */
201 #define CEIL(x,y) (((x) + (y) - 1) / (y))
203 #ifdef HAVE_SYS_WAIT_H
204 #include <sys/wait.h>
208 #define WIFSIGNALED(S) (((S) & 0xff) != 0 && ((S) & 0xff) != 0x7f)
211 #define WTERMSIG(S) ((S) & 0x7f)
214 #define WIFEXITED(S) (((S) & 0xff) == 0)
217 #define WEXITSTATUS(S) (((S) & 0xff00) >> 8)
220 #define WSTOPSIG WEXITSTATUS
223 #define WCOREDUMP(S) ((S) & WCOREFLG)
226 #define WCOREFLG 0200
229 /* The HAVE_DECL_* macros are three-state, undefined, 0 or 1. If they
230 are defined to 0 then we must provide the relevant declaration
231 here. These checks will be in the undefined state while configure
232 is running so be careful to test "defined (HAVE_DECL_*)". */
234 #if defined (HAVE_DECL_ATOF) && !HAVE_DECL_ATOF
235 extern double atof PARAMS ((const char *));
238 #if defined (HAVE_DECL_ATOL) && !HAVE_DECL_ATOL
239 extern long atol PARAMS ((const char *));
242 #if defined (HAVE_DECL_FREE) && !HAVE_DECL_FREE
243 extern void free PARAMS ((PTR));
246 #if defined (HAVE_DECL_GETENV) && !HAVE_DECL_GETENV
247 extern char *getenv PARAMS ((const char *));
250 #if defined (HAVE_DECL_STRSTR) && !HAVE_DECL_STRSTR
251 extern char *strstr PARAMS ((const char *, const char *));
258 #if defined (HAVE_DECL_MALLOC) && !HAVE_DECL_MALLOC
259 extern PTR malloc PARAMS ((size_t));
262 #if defined (HAVE_DECL_CALLOC) && !HAVE_DECL_CALLOC
263 extern PTR calloc PARAMS ((size_t, size_t));
266 #if defined (HAVE_DECL_REALLOC) && !HAVE_DECL_REALLOC
267 extern PTR realloc PARAMS ((PTR, size_t));
270 #if !defined(__STDC__) && !defined(volatile)
274 #if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
275 extern void abort PARAMS ((void));
278 /* 1 if we have C99 designated initializers. */
279 #if !defined(HAVE_DESIGNATED_INITIALIZERS)
280 #if defined(__APPLE__) && (__MACH__)
281 #define HAVE_DESIGNATED_INITIALIZERS 0
283 #define HAVE_DESIGNATED_INITIALIZERS \
284 ((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L))
289 # include <sys/stat.h>
292 /* Test if something is a normal file. */
294 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
297 /* Test if something is a directory. */
299 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
302 /* Test if something is a character special file. */
304 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
307 /* Test if something is a block special file. */
309 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
312 /* Test if something is a socket. */
315 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
317 # define S_ISSOCK(m) 0
321 /* Test if something is a FIFO. */
324 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
326 # define S_ISFIFO(m) 0
330 /* Approximate O_NONBLOCK. */
332 #define O_NONBLOCK O_NDELAY
335 /* Approximate O_NOCTTY. */
340 /* Define well known filenos if the system does not define them. */
342 # define STDIN_FILENO 0
344 #ifndef STDOUT_FILENO
345 # define STDOUT_FILENO 1
347 #ifndef STDERR_FILENO
348 # define STDERR_FILENO 2
351 /* Some systems have mkdir that takes a single argument. */
352 #ifdef MKDIR_TAKES_ONE_ARG
353 # define mkdir(a,b) mkdir(a)
356 /* Provide a way to print an address via printf. */
357 #ifndef HOST_PTR_PRINTF
358 # ifdef HAVE_PRINTF_PTR
359 # define HOST_PTR_PRINTF "%p"
361 # define HOST_PTR_PRINTF \
362 (sizeof (int) == sizeof (char *) ? "%x" \
363 : sizeof (long) == sizeof (char *) ? "%lx" : "%llx")
365 #endif /* ! HOST_PTR_PRINTF */
367 /* By default, colon separates directories in a path. */
368 #ifndef PATH_SEPARATOR
369 #define PATH_SEPARATOR ':'
372 #ifndef DIR_SEPARATOR
373 #define DIR_SEPARATOR '/'
376 /* Define IS_DIR_SEPARATOR. */
377 #ifndef DIR_SEPARATOR_2
378 # define IS_DIR_SEPARATOR(CH) ((CH) == DIR_SEPARATOR)
379 #else /* DIR_SEPARATOR_2 */
380 # define IS_DIR_SEPARATOR(CH) \
381 (((CH) == DIR_SEPARATOR) || ((CH) == DIR_SEPARATOR_2))
382 #endif /* DIR_SEPARATOR_2 */
384 /* Say how to test for an absolute pathname. On Unix systems, this is if
385 it starts with a leading slash or a '$', the latter meaning the value of
386 an environment variable is to be used. On machien with DOS-based
387 file systems, it is also absolute if it starts with a drive identifier. */
388 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
389 #define IS_ABSOLUTE_PATHNAME(STR) \
390 (IS_DIR_SEPARATOR ((STR)[0]) || (STR)[0] == '$' \
391 || ((STR)[0] != '\0' && (STR)[1] == ':' && IS_DIR_SEPARATOR ((STR)[2])))
393 #define IS_ABSOLUTE_PATHNAME(STR) \
394 (IS_DIR_SEPARATOR ((STR)[0]) || (STR)[0] == '$')
397 /* Get libiberty declarations. */
398 #include "libiberty.h"
401 /* Provide a default for the HOST_BIT_BUCKET.
402 This suffices for POSIX-like hosts. */
404 #ifndef HOST_BIT_BUCKET
405 #define HOST_BIT_BUCKET "/dev/null"
408 /* Be conservative and only use enum bitfields with GCC.
409 FIXME: provide a complete autoconf test for buggy enum bitfields. */
411 #if (GCC_VERSION > 2000)
412 #define ENUM_BITFIELD(TYPE) enum TYPE
414 #define ENUM_BITFIELD(TYPE) unsigned int
418 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
421 /* Traditional C cannot initialize union members of structs. Provide
422 a macro which expands appropriately to handle it. This only works
423 if you intend to initialize the union member to zero since it relies
424 on default initialization to zero in the traditional C case. */
426 #define UNION_INIT_ZERO , {0}
428 #define UNION_INIT_ZERO
431 /* Various error reporting routines want to use __FUNCTION__. */
432 #if (GCC_VERSION < 2007)
434 #define __FUNCTION__ "?"
435 #endif /* ! __FUNCTION__ */
438 /* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
439 the most likely value of A is B. This feature was added at some point
440 between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */
441 #if (GCC_VERSION < 3000)
442 #define __builtin_expect(a, b) (a)
445 /* Provide some sort of boolean type. We use stdbool.h if it's
446 available. This must be after all inclusion of system headers,
447 as some of them will mess us up. */
454 #ifdef HAVE_STDBOOL_H
455 # include <stdbool.h>
468 /* As the last action in this file, we poison the identifiers that
469 shouldn't be used. Note, luckily gcc-3.0's token-based integrated
470 preprocessor won't trip on poisoned identifiers that arrive from
471 the expansion of macros. E.g. #define strrchr rindex, won't error
472 if rindex is poisoned after this directive is issued and later on
475 Note: We define bypass macros for the few cases where we really
476 want to use the libc memory allocation routines. Otherwise we
477 insist you use the "x" versions from libiberty. */
479 #define really_call_malloc malloc
480 #define really_call_calloc calloc
481 #define really_call_realloc realloc
483 #if (GCC_VERSION >= 3000)
485 /* Note autoconf checks for prototype declarations and includes
486 system.h while doing so. Only poison these tokens if actually
487 compiling gcc, so that the autoconf declaration tests for malloc
488 etc don't spuriously fail. */
492 #pragma GCC poison calloc strdup
494 #if defined(FLEX_SCANNER) || defined (YYBISON) || defined(YYBYACC)
495 /* Flex and bison use malloc and realloc. Yuk. */
496 #define malloc xmalloc
497 #define realloc xrealloc
501 #pragma GCC poison malloc realloc
504 /* Old target macros that have moved to the target hooks structure. */
505 #pragma GCC poison ASM_OPEN_PAREN ASM_CLOSE_PAREN \
506 FUNCTION_PROLOGUE FUNCTION_EPILOGUE \
507 FUNCTION_END_PROLOGUE FUNCTION_BEGIN_EPILOGUE \
508 DECL_MACHINE_ATTRIBUTES COMP_TYPE_ATTRIBUTES INSERT_ATTRIBUTES \
509 VALID_MACHINE_DECL_ATTRIBUTE VALID_MACHINE_TYPE_ATTRIBUTE \
510 SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_DECL_ATTRIBUTES \
511 MERGE_MACHINE_TYPE_ATTRIBUTES MERGE_MACHINE_DECL_ATTRIBUTES \
512 MD_INIT_BUILTINS MD_EXPAND_BUILTIN ASM_OUTPUT_CONSTRUCTOR \
513 ASM_OUTPUT_DESTRUCTOR SIGNED_CHAR_SPEC MAX_CHAR_TYPE_SIZE \
514 WCHAR_UNSIGNED UNIQUE_SECTION SELECT_SECTION SELECT_RTX_SECTION \
515 ENCODE_SECTION_INFO STRIP_NAME_ENCODING ASM_GLOBALIZE_LABEL \
518 /* Other obsolete target macros, or macros that used to be in target
519 headers and were not used, and may be obsolete or may never have
521 #pragma GCC poison INT_ASM_OP ASM_OUTPUT_EH_REGION_BEG \
522 ASM_OUTPUT_EH_REGION_END ASM_OUTPUT_LABELREF_AS_INT \
523 DOESNT_NEED_UNWINDER EH_TABLE_LOOKUP OBJC_SELECTORS_WITHOUT_LABELS \
524 OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR \
525 LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC \
526 STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE \
527 SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET DWARF_LINE_MIN_INSTR_LENGTH \
528 TRADITIONAL_RETURN_FLOAT NO_BUILTIN_SIZE_TYPE \
529 NO_BUILTIN_PTRDIFF_TYPE NO_BUILTIN_WCHAR_TYPE NO_BUILTIN_WINT_TYPE \
530 BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER \
531 FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE \
532 MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP \
533 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
535 /* Hooks that are no longer used. */
536 #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE \
541 /* Note: not all uses of the `index' token (e.g. variable names and
542 structure members) have been eliminated. */
547 #pragma GCC poison bcopy bzero bcmp rindex
549 #endif /* GCC >= 3.0 */
554 #endif /* ! GCC_SYSTEM_H */