Ensure single 'UNSUPPORTED: prettyprinters.exp' message

2014-11-25  Tom de Vries  <tom@codesourcery.com>

	* testsuite/libstdc++-prettyprinters/prettyprinters.exp: Add missing
	dg-finish.  Only print unsupported message once.

From-SVN: r218060

libstdc++-v3/ChangeLog

+2014-11-25  Tom de Vries  <tom@codesourcery.com>
+
+	* testsuite/libstdc++-prettyprinters/prettyprinters.exp: Add missing
+	dg-finish.  Only print unsupported message once.
+
 2014-11-25  Tim Shen  <timshen@google.com>
 
 	PR libstdc++/63920

libstdc++-v3/testsuite/libstdc++-prettyprinters/prettyprinters.exp

@@ -30,7 +30,14 @@ if ![info exists ::env(GUALITY_GDB_NAME)] {
 }
 
 if {! [gdb_version_check]} {
+    dg-finish
+    # Only print unsupported message in one instance.
+    if ![gcc_parallel_test_run_p prettyprinters] {
+	return
+    }
+    gcc_parallel_test_enable 0
     unsupported "prettyprinters.exp"
+    gcc_parallel_test_enable 1
     return
 }