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/* Emulate getpagesize on systems that lack it. */
#ifndef HAVE_GETPAGESIZE
#if !defined getpagesize && defined __BEOS__
# include <OS.h>
# define getpagesize() B_PAGE_SIZE
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#if !defined getpagesize && defined _SC_PAGESIZE
# if !(defined VMS && __VMS_VER < 70000000)
# define getpagesize() sysconf (_SC_PAGESIZE)
# endif
#endif
#if !defined getpagesize && defined VMS
# ifdef __ALPHA
# define getpagesize() 8192
# else
# define getpagesize() 512
# endif
#endif
#ifndef getpagesize
# include <sys/param.h>
# ifdef EXEC_PAGESIZE
# define getpagesize() EXEC_PAGESIZE
# else
# ifdef NBPG
# ifndef CLSIZE
# define CLSIZE 1
# endif
# define getpagesize() (NBPG * CLSIZE)
# else
# ifdef NBPC
# define getpagesize() NBPC
# endif
# endif
# endif
#endif
#endif /* not HAVE_GETPAGESIZE */
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