free.c

/* Work around incompatibility on older systems where free (NULL) fails.

   Copyright (C) 2003 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 3, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* written by Paul Eggert */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#undef free

#include <stdlib.h>

void
rpl_free (void *p)
{
  if (p)
    free (p);
}

http://linux.die.net/man/3/free