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- /* Emulate getpagesize on systems that lack it. */
-
- #ifndef HAVE_GETPAGESIZE
-
- # ifdef VMS
- # define getpagesize() 512
- # endif
-
- # ifdef HAVE_UNISTD_H
- # include <unistd.h>
- # endif
-
- # ifdef _SC_PAGESIZE
- # define getpagesize() sysconf(_SC_PAGESIZE)
- # else /* no _SC_PAGESIZE */
- # ifdef HAVE_SYS_PARAM_H
- # include <sys/param.h>
- # ifdef EXEC_PAGESIZE
- # define getpagesize() EXEC_PAGESIZE
- # else /* no EXEC_PAGESIZE */
- # ifdef NBPG
- # define getpagesize() NBPG * CLSIZE
- # ifndef CLSIZE
- # define CLSIZE 1
- # endif /* no CLSIZE */
- # else /* no NBPG */
- # ifdef NBPC
- # define getpagesize() NBPC
- # else /* no NBPC */
- # ifdef PAGESIZE
- # define getpagesize() PAGESIZE
- # endif /* PAGESIZE */
- # endif /* no NBPC */
- # endif /* no NBPG */
- # endif /* no EXEC_PAGESIZE */
- # else /* no HAVE_SYS_PARAM_H */
- # define getpagesize() 8192 /* punt totally */
- # endif /* no HAVE_SYS_PARAM_H */
- # endif /* no _SC_PAGESIZE */
-
- #endif /* no HAVE_GETPAGESIZE */
-