text: #ifndef __GCAL_H
  # define __GCAL_H
  /*!
  *  \file gcal.h
  *  \brief Get and process the program options
  *           and lauch the extended calendar program header file.
  */
  /*
  *  Copyright (c) 1994, 95, 96, 1997, 2000 Thomas Esken
  *  Copyright (c) 2010, 2011, 2013 Free Software Foundation, Inc.
  *
  *  This software doesn't claim completeness, correctness or usability.
  *  On principle I will not be liable for ANY damages or losses (implicit
  *  or explicit), which result from using or handling my software.
  *  If you use this software, you agree without any exception to this
  *  agreement, which binds you LEGALLY !!
  *
  *  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 3, or (at your option)
  *  any later version.
  *
  *  You should have received a copy of the `GNU General Public License'
  *  along with this program; if not, write to the:
  *
  */
  
  
  
  /*
  *  $Id: gcal.h 3.01 2000/06/14 03:00:01 tom Exp $
  */
  
  
  
  /*
  *  GLOBAL functions prototypes.
  */
  __BEGIN_DECLARATIONS
  /*
  ************************************************** Defined in `gcal.c'.
  */
  extern int main __P_ ((int argc, char *argv[]));
  extern int eval_longopt __P_ ((char *longopt, int *longopt_symbolic));
  __END_DECLARATIONS
  #endif /* __GCAL_H */
  