Ensure the tst.varint test can run outside the build tree

The tst.varint.c test was depending on two source tree files.  Those
files are no longer available when you install DTrace packages.  The
test has been turned into a script that executes a test/utils program
that is compiled at build time.

Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com>
Reviewed-by: Nick Alcock <nick.alcock@oracle.com>

test/internals/tst.varint.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+#
+# Oracle Linux DTrace.
+# Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
+# Licensed under the Universal Permissive License v 1.0 as shown at
+# http://oss.oracle.com/licenses/upl.
+#
+
+exec test/utils/tst.varint

test/utils/Build

@@ -1,9 +1,9 @@
 # Oracle Linux DTrace.
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # Licensed under the Universal Permissive License v 1.0 as shown at
 # http://oss.oracle.com/licenses/upl.
 
-TEST_UTILS = baddof badioctl showUSDT print-stack-layout
+TEST_UTILS = baddof badioctl showUSDT print-stack-layout tst.varint
 
 define test-util-template
 CMDS += $(1)

test/internals/tst.varint.c → test/utils/tst.varint.c

@@ -1,5 +1,3 @@
-/* @@link: -Ilibdtrace */
-
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -9,7 +7,7 @@ void
 check(uint64_t val, int exp)
 {
 	char		s[VARINT_MAX_BYTES];
-	char		*p;
+	const char	*p;
 	int		rc, len;
 	uint64_t	dval;
 
@@ -28,7 +26,7 @@ check(uint64_t val, int exp)
 		printf("Skip wrong for %lu: %d vs %d\n", val, 0, exp);
 		exit(1);
 	} else if ((p - s) != exp) {
-		printf("Skip wrong for %lu: %d vs %d\n", val, p - s, exp);
+		printf("Skip wrong for %lu: %ld vs %d\n", val, p - s, exp);
 		exit(1);
 	}
 	dval = dt_vint2int(s);