317 lines
7.4 KiB
C
317 lines
7.4 KiB
C
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/* system.h - Get common system includes and various definitions and
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declarations based on autoconf macros.
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Copyright (C) 1998 Free Software Foundation, Inc.
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*/
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#ifndef __GCC_SYSTEM_H__
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#define __GCC_SYSTEM_H__
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#include <stdio.h>
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/* Define a generic NULL if one hasn't already been defined. */
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#ifndef NULL
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#define NULL 0
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#endif
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#include <ctype.h>
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/* Jim Meyering writes:
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"... Some ctype macros are valid only for character codes that
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isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when
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using /bin/cc or gcc but without giving an ansi option). So, all
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ctype uses should be through macros like ISPRINT... If
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STDC_HEADERS is defined, then autoconf has verified that the ctype
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macros don't need to be guarded with references to isascii. ...
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Defining isascii to 1 should let any compiler worth its salt
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eliminate the && through constant folding."
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Bruno Haible adds:
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"... Furthermore, isupper(c) etc. have an undefined result if c is
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outside the range -1 <= c <= 255. One is tempted to write isupper(c)
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with c being of type `char', but this is wrong if c is an 8-bit
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character >= 128 which gets sign-extended to a negative value.
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The macro ISUPPER protects against this as well." */
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#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
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# define IN_CTYPE_DOMAIN(c) 1
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#else
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# define IN_CTYPE_DOMAIN(c) isascii(c)
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#endif
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#ifdef isblank
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# define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c))
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#else
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# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
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#endif
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#ifdef isgraph
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# define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (c))
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#else
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# define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (c) && !isspace (c))
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#endif
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#define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
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#define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c))
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#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
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#define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c))
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#define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))
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#define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (c))
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#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
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#define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c))
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#define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c))
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#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
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/* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
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- Its arg may be any int or unsigned int; it need not be an unsigned char.
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- It's guaranteed to evaluate its argument exactly once.
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- It's typically faster.
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Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
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only '0' through '9' are digits. Prefer ISDIGIT to ISDIGIT_LOCALE unless
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it's important to use the locale's definition of `digit' even when the
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host does not conform to Posix. */
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#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
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#include <sys/types.h>
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#include <errno.h>
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#ifndef errno
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extern int errno;
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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#endif
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#if HAVE_LIMITS_H
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# include <limits.h>
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#endif
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#ifdef TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# ifdef HAVE_TIME_H
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# include <time.h>
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# endif
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# endif
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#endif
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#ifdef HAVE_FCNTL_H
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# include <fcntl.h>
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#else
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# ifdef HAVE_SYS_FILE_H
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# include <sys/file.h>
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# endif
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#endif
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#ifndef SEEK_SET
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# define SEEK_SET 0
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# define SEEK_CUR 1
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# define SEEK_END 2
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#endif
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#ifndef F_OK
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# define F_OK 0
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# define X_OK 1
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# define W_OK 2
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# define R_OK 4
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#endif
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#ifndef O_RDONLY
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# define O_RDONLY 0
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#endif
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#ifndef O_WRONLY
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# define O_WRONLY 1
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#endif
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#ifndef bcopy
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# ifdef HAVE_BCOPY
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# ifdef NEED_DECLARATION_BCOPY
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extern void bcopy ();
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# endif
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# else /* ! HAVE_BCOPY */
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# define bcopy(src,dst,len) memcpy ((dst),(src),(len))
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# endif
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#endif
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#ifndef bcmp
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# ifdef HAVE_BCMP
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# ifdef NEED_DECLARATION_BCMP
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extern int bcmp ();
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# endif
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# else /* ! HAVE_BCMP */
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# define bcmp(left,right,len) memcmp ((left),(right),(len))
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# endif
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#endif
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#ifndef bzero
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# ifdef HAVE_BZERO
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# ifdef NEED_DECLARATION_BZERO
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extern void bzero ();
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# endif
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# else /* ! HAVE_BZERO */
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# define bzero(dst,len) memset ((dst),0,(len))
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# endif
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#endif
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#ifndef index
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# ifdef HAVE_INDEX
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# ifdef NEED_DECLARATION_INDEX
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extern char *index ();
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# endif
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# else /* ! HAVE_INDEX */
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# define index strchr
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# endif
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#endif
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#ifndef rindex
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# ifdef HAVE_RINDEX
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# ifdef NEED_DECLARATION_RINDEX
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extern char *rindex ();
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# endif
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# else /* ! HAVE_RINDEX */
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# define rindex strrchr
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# endif
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#endif
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#ifdef NEED_DECLARATION_ATOF
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extern double atof ();
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#endif
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#ifdef NEED_DECLARATION_ATOL
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extern long atol();
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#endif
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#ifdef NEED_DECLARATION_FREE
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extern void free ();
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#endif
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#ifdef NEED_DECLARATION_GETCWD
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extern char *getcwd ();
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#endif
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#ifdef NEED_DECLARATION_GETENV
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extern char *getenv ();
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#endif
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#ifdef NEED_DECLARATION_GETWD
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extern char *getwd ();
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#endif
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#ifdef NEED_DECLARATION_SBRK
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extern char *sbrk ();
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#endif
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#ifdef HAVE_STRERROR
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# ifdef NEED_DECLARATION_STRERROR
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# ifndef strerror
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extern char *strerror ();
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# endif
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# endif
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#else /* ! HAVE_STRERROR */
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extern int sys_nerr;
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extern char *sys_errlist[];
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#endif /* HAVE_STRERROR */
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#ifdef HAVE_GETRLIMIT
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# ifdef NEED_DECLARATION_GETRLIMIT
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# ifndef getrlimit
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extern int getrlimit ();
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# endif
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# endif
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#endif
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#ifdef HAVE_SETRLIMIT
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# ifdef NEED_DECLARATION_SETRLIMIT
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# ifndef setrlimit
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extern int setrlimit ();
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# endif
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# endif
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#endif
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/* HAVE_VOLATILE only refers to the stage1 compiler. We also check
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__STDC__ and assume gcc sets it and has volatile in stage >=2. */
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#if !defined(HAVE_VOLATILE) && !defined(__STDC__) && !defined(volatile)
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#define volatile
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#endif
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/* Redefine abort to report an internal error w/o coredump, and reporting the
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location of the error in the source file. */
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#ifndef abort
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#ifndef __STDC__
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#ifndef __GNUC__
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#ifndef USE_SYSTEM_ABORT
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#define USE_SYSTEM_ABORT
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#endif /* !USE_SYSTEM_ABORT */
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#endif /* !__GNUC__ */
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#endif /* !__STDC__ */
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#ifdef USE_SYSTEM_ABORT
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# ifdef NEED_DECLARATION_ABORT
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extern void abort ();
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# endif
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#else
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#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
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#define abort() \
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(fprintf (stderr, \
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"%s:%d: Internal compiler error\n", __FILE__, __LINE__), \
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exit (FATAL_EXIT_CODE))
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#else
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#define abort() \
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(fprintf (stderr, \
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"%s:%d: Internal compiler error in function %s\n", \
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__FILE__, __LINE__, __PRETTY_FUNCTION__), \
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exit (FATAL_EXIT_CODE))
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#endif /* recent gcc */
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#endif /* USE_SYSTEM_ABORT */
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#endif /* !abort */
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/* Define a STRINGIFY macro that's right for ANSI or traditional C.
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HAVE_CPP_STRINGIFY only refers to the stage1 compiler. Assume that
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(non-traditional) gcc used in stage2 or later has this feature.
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Note: if the argument passed to STRINGIFY is itself a macro, eg
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#define foo bar, STRINGIFY(foo) will produce "foo", not "bar".
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Although the __STDC__ case could be made to expand this via a layer
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of indirection, the traditional C case can not do so. Therefore
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this behavior is not supported. */
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#ifndef STRINGIFY
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# if defined(HAVE_CPP_STRINGIFY) || (defined(__GNUC__) && defined(__STDC__))
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# define STRINGIFY(STRING) #STRING
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# else
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# define STRINGIFY(STRING) "STRING"
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# endif
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#endif /* ! STRINGIFY */
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/* These macros are here in preparation for the use of gettext in egcs. */
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#define _(String) String
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#define N_(String) String
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#endif /* __GCC_SYSTEM_H__ */
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