text: /*
   * Postgres files that use getopt(3) always include this file.
   * We must cope with three different scenarios:
   * 1. We're using the platform's getopt(), and we should just import the
   *    appropriate declarations.
   * 2. The platform lacks getopt(), and we must declare everything.
   * 3. The platform has getopt(), but we're not using it because we don't
   *    like its behavior.  The declarations we make here must be compatible
   *    with both the platform's getopt() and our src/port/getopt.c.
   *
   * Portions Copyright (c) 1987, 1993, 1994
   * The Regents of the University of California.  All rights reserved.
   *
   * Portions Copyright (c) 2003-2021, PostgreSQL Global Development Group
   *
   * src/include/pg_getopt.h
   */
  #ifndef PG_GETOPT_H
  #define PG_GETOPT_H
  
  /* POSIX says getopt() is provided by unistd.h */
  #include <unistd.h>
  
  /* rely on the system's getopt.h if present */
  #ifdef HAVE_GETOPT_H
  #include <getopt.h>
  #endif
  
  /*
   * If we have <getopt.h>, assume it declares these variables, else do that
   * ourselves.  (We used to just declare them unconditionally, but Cygwin
   * doesn't like that.)
   */
  #ifndef HAVE_GETOPT_H
  
  extern char *optarg;
  extern int	optind;
  extern int	opterr;
  extern int	optopt;
  
  #endif							/* HAVE_GETOPT_H */
  
  /*
   * Some platforms have optreset but fail to declare it in <getopt.h>, so cope.
   * Cygwin, however, doesn't like this either.
   */
  #if defined(HAVE_INT_OPTRESET) && !defined(__CYGWIN__)
  extern int	optreset;
  #endif
  
  /* Provide getopt() declaration if the platform doesn't have it */
  #ifndef HAVE_GETOPT
  extern int	getopt(int nargc, char *const *nargv, const char *ostr);
  #endif
  
  #endif							/* PG_GETOPT_H */
  