func: int show_license(void *optctx, const char *opt, const char *arg)
  
  {
  
      printf(
  
  #if CONFIG_NONFREE
  
      "This version of %s has nonfree parts compiled in.\n"
  
      "Therefore it is not legally redistributable.\n",
  
      program_name
  
  #elif CONFIG_GPLV3
  
      "%s is free software; you can redistribute it and/or modify\n"
  
      "it under the terms of the GNU General Public License as published by\n"
  
      "the Free Software Foundation; either version 3 of the License, or\n"
  
      "(at your option) any later version.\n"
  
      "\n"
  
      "%s is distributed in the hope that it will be useful,\n"
  
      "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  
      "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
  
      "GNU General Public License for more details.\n"
  
      "\n"
  
      "You should have received a copy of the GNU General Public License\n"
  
      "along with %s.  If not, see <http://www.gnu.org/licenses/>.\n",
  
      program_name, program_name, program_name
  
  #elif CONFIG_GPL
  
      "%s is free software; you can redistribute it and/or modify\n"
  
      "it under the terms of the GNU General Public License as published by\n"
  
      "the Free Software Foundation; either version 2 of the License, or\n"
  
      "(at your option) any later version.\n"
  
      "\n"
  
      "%s is distributed in the hope that it will be useful,\n"
  
      "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  
      "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
  
      "GNU General Public License for more details.\n"
  
      "\n"
  
      "You should have received a copy of the GNU General Public License\n"
  
      "along with %s; if not, write to the Free Software\n"
  
      "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
  
      program_name, program_name, program_name
  
  #elif CONFIG_LGPLV3
  
      "%s is free software; you can redistribute it and/or modify\n"
  
      "it under the terms of the GNU Lesser General Public License as published by\n"
  
      "the Free Software Foundation; either version 3 of the License, or\n"
  
      "(at your option) any later version.\n"
  
      "\n"
  
      "%s is distributed in the hope that it will be useful,\n"
  
      "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  
      "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
  
      "GNU Lesser General Public License for more details.\n"
  
      "\n"
  
      "You should have received a copy of the GNU Lesser General Public License\n"
  
      "along with %s.  If not, see <http://www.gnu.org/licenses/>.\n",
  
      program_name, program_name, program_name
  
  #else
  
      "%s is free software; you can redistribute it and/or\n"
  
      "modify it under the terms of the GNU Lesser General Public\n"
  
      "License as published by the Free Software Foundation; either\n"
  
      "version 2.1 of the License, or (at your option) any later version.\n"
  
      "\n"
  
      "%s is distributed in the hope that it will be useful,\n"
  
      "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  
      "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n"
  
      "Lesser General Public License for more details.\n"
  
      "\n"
  
      "You should have received a copy of the GNU Lesser General Public\n"
  
      "License along with %s; if not, write to the Free Software\n"
  
      "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n",
  
      program_name, program_name, program_name
  
  #endif
  
      );
  
  
  
      return 0;
  
  }
  