re PR libstdc++/33394 (Add test case for Thread race segfault in…

re PR libstdc++/33394 (Add test case for Thread race segfault in std::string::append with -O and -s)

	PR libstdc++/33394
	* testsuite/21_strings/basic_string/pthread33394.cc: Use
	dg-additional-options.

From-SVN: r221666

libstdc++-v3/ChangeLog

+2015-03-25  Alan Lawrence  <alan.lawrence@arm.com>
+
+	PR libstdc++/33394
+	* testsuite/21_strings/basic_string/pthread33394.cc: Use
+	dg-additional-options.
+
 2015-03-25  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR libstdc++/65543

libstdc++-v3/testsuite/21_strings/basic_string/pthread33394.cc

@@ -18,7 +18,7 @@
 // { dg-do run { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* } }
 // { dg-options "-pthread" { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* } }
 
-// { dg-options "-DITERATIONS=1000" { target simulator } }
+// { dg-additional-options "-DITERATIONS=1000" { target simulator } }
 #ifndef ITERATIONS
 #define ITERATIONS 50000
 #endif