/* declarations for getopt   Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc.   This program is free software; you can redistribute it and/or modify   it under the terms of the GNU General Public License as published by   the Free Software Foundation; either version 2, or (at your option)   any later version.   This program is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   GNU General Public License for more details.   You should have received a copy of the GNU General Public License   along with this program; if not, write to the Free Software   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  *//* For communication from `getopt' to the caller.   When `getopt' finds an option that takes an argument,   the argument value is returned here.   Also, when `ordering' is RETURN_IN_ORDER,   each non-option ARGV-element is returned here.  */extern char *optarg;/* Index in ARGV of the next element to be scanned.   This is used for communication to and from the caller   and for communication between successive calls to `getopt'.   On entry to `getopt', zero means this is the first call; initialize.   When `getopt' returns EOF, this is the index of the first of the   non-option elements that the caller should itself scan.   Otherwise, `optind' communicates from one call to the next   how much of ARGV has been scanned so far.  */extern int optind;/* Callers store zero here to inhibit the error message `getopt' prints   for unrecognized options.  */extern int opterr;/* Describe the long-named options requested by the application.   _GETOPT_LONG_OPTIONS is a vector of `struct option' terminated by an   element containing a name which is zero.   The field `has_arg' is:   0 if the option does not take an argument,   1 if the option requires an argument,   2 if the option takes an optional argument.   If the field `flag' is nonzero, it points to a variable that is set   to the value given in the field `val' when the option is found, but   left unchanged if the option is not found.   To have a long-named option do something other than set an `int' to   a compiled-in constant, such as set a value from `optarg', set the   option's `flag' field to zero and its `val' field to a nonzero   value (the equivalent single-letter option character, if there is   one).  For long options that have a zero `flag' field, `getopt'   returns the contents of the `val' field.  */struct option{  char *name;  int has_arg;  int *flag;  int val;};#ifdef __STDC__extern const struct option *_getopt_long_options;#elseextern struct option *_getopt_long_options;#endif/* If nonzero, '-' can introduce long-named options.   Set by getopt_long_only.  */extern int _getopt_long_only;/* The index in GETOPT_LONG_OPTIONS of the long-named option found.   Only valid when a long-named option has been found by the most   recent call to `getopt'.  */extern int option_index;#ifdef __STDC__int getopt (int argc, char **argv, const char *shortopts);int getopt_long (int argc, char **argv, const char *shortopts,		 const struct option *longopts, int *longind);int getopt_long_only (int argc, char **argv, const char *shortopts,		      const struct option *longopts, int *longind);void envopt(int *pargc, char ***pargv, char *optstr);#elseint getopt ();int getopt_long ();int getopt_long_only ();void envopt();#endif