_SC_PAGESIZE sysconf() support

include/unistd.h

@@ -63,6 +63,8 @@
 #define _SC_VERSION	   8
 #define _SC_STREAM_MAX	   9
 #define _SC_TZNAME_MAX    10
+#define _SC_PAGESIZE	  11
+#define _SC_PAGE_SIZE	  _SC_PAGESIZE
 
 /* The following relate to configurable pathname variables. POSIX Table 5-2. */
 #define _PC_LINK_MAX	   1	/* link count */

lib/other/sysconf.c

@@ -45,6 +45,9 @@ int name;			/* property being inspected */
 	case _SC_TZNAME_MAX:
 		return (long) TZNAME_MAX;
 
+	case _SC_PAGESIZE:
+		return getpagesize();
+
 	default:
 		errno = EINVAL;
 		return -1L;