text: /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
  /*
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation;
   *
   * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   *
   *
   * FreeBSD log2 patch from graphviz port to FreeBSD 9, courtesy of
   * Christoph Moench-Tegeder <cmt@burggraben.net>
   */
  
  // It is recommended to include this header instead of <math.h> or 
  // <cmath> whenever the log2(x) function is needed.  See bug 1467.
  
  #ifndef MATH_H
  #define MATH_H
  
  #include <cmath>
  
  #ifdef __FreeBSD__
  
  #if __FreeBSD_version <= 704101 ||				 \
    (__FreeBSD_version >= 800000 && __FreeBSD_version < 802502) || \
    (__FreeBSD_version >= 900000 && __FreeBSD_version < 900027)
  #define log2(x) (std::log(x) / M_LN2)
  #endif /* __FreeBSD_version */
  
  #endif /* __FreeBSD__ */
  
  #endif /* MATH_H */
  