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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
- #include <sys/param.h>
- #ifdef EXEC_PAGESIZE
- #define getpagesize() EXEC_PAGESIZE
- #else
- #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
- #endif /* NBPC */
- #endif /* no NBPG */
- #endif /* no EXEC_PAGESIZE */
- #endif /* no _SC_PAGESIZE */
- #endif /* not HAVE_GETPAGESIZE */
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