[PATCH] Add test for PR c++/53711

[Patrick Palka]

This patch adds a test case for PR c++/53711 which seems to have been
resolved by r199906.

        PR c++/53711
        * d++.dg/warn/anonymous-namespace-6.C: New test.
---
 gcc/testsuite/g++.dg/warn/anonymous-namespace-6.C | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/warn/anonymous-namespace-6.C

diff --git a/gcc/testsuite/g++.dg/warn/anonymous-namespace-6.C 
b/gcc/testsuite/g++.dg/warn/anonymous-namespace-6.C
new file mode 100644
index 0000000..d238df3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/anonymous-namespace-6.C
@@ -0,0 +1,8 @@
+// PR c++/53711
+// { dg-options -Wall }
+
+namespace {
+  void f () // { dg-warning "not used" }
+  {
+  }
+}
-- 
1.9.0