#include <unistd.h>
#if !defined getpagesize && defined _SC_PAGESIZE
-# if !(defined VMS && __VMS_VER < 70000000)
+# if ! (defined __VMS && __VMS_VER < 70000000)
# define getpagesize() sysconf (_SC_PAGESIZE)
# endif
#endif
-#if !defined getpagesize && defined VMS
+#if !defined getpagesize && defined __VMS
# ifdef __ALPHA
# define getpagesize() 8192
# else
# endif
#endif
+/* This is for AmigaOS4.0. */
+#if !defined getpagesize && defined __amigaos4__
+# define getpagesize() 2048
+#endif
+
#if !defined getpagesize && HAVE_SYS_PARAM_H
# include <sys/param.h>
# ifdef EXEC_PAGESIZE