libgomp: Additional acc_shutdown bug fixing and testing

	libgomp/
	* oacc-init.c (acc_shutdown): Call gomp_init_targets_once.
	* testsuite/libgomp.oacc-c-c++-common/lib-8.c: New file.

From-SVN: r229380

libgomp/ChangeLog

 2015-10-26  Thomas Schwinge  <thomas@codesourcery.com>
 
+	* oacc-init.c (acc_shutdown): Call gomp_init_targets_once.
+	* testsuite/libgomp.oacc-c-c++-common/lib-8.c: New file.
+
 	PR libgomp/66518
 	* testsuite/libgomp.oacc-c-c++-common/lib-3.c: Resolve XFAIL.
 

libgomp/oacc-init.c

@@ -449,6 +449,8 @@ ialias (acc_init)
 void
 acc_shutdown (acc_device_t d)
 {
+  gomp_init_targets_once ();
+
   gomp_mutex_lock (&acc_device_lock);
 
   acc_shutdown_1 (d);

libgomp/testsuite/libgomp.oacc-c-c++-common/lib-8.c

+/* Expect error message when shutting down a device that has never been
+   initialized.  */
+/* { dg-do run } */
+
+#include <stdio.h>
+#include <openacc.h>
+
+int
+main (int argc, char **argv)
+{
+  fprintf (stderr, "CheCKpOInT\n");
+  acc_shutdown (acc_device_default);
+
+  return 0;
+}
+
+/* { dg-output "CheCKpOInT(\n|\r\n|\r).*" } */
+/* { dg-output "no device initialized" } */
+/* { dg-shouldfail "" } */