add new | syntax.

syntax will change.

src/cmd/mk/sys.std.h

@@ -0,0 +1,22 @@
+#include <utf.h>
+#include <fmt.h>
+#include <bio.h>
+#include <regexp9.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <ctype.h>
+#include <time.h>
+
+#define OREAD		O_RDONLY
+#define OWRITE	O_WRONLY
+#define ORDWR	O_RDWR
+#define nil 0
+#define nelem(x) sizeof((x)/sizeof((x)[0]))
+#define seek lseek
+#define remove unlink
+#define exits(x)	exit(x && *(char*)x ? 1 : 0)
+#define USED(x)	if(x){}else
+#define create(name, mode, perm)	open(name, mode|O_CREAT, perm)
+#define ERRMAX	256