From 536c535cb0cf245a1785d436b0662f7fe59ef1e4 Mon Sep 17 00:00:00 2001
From: Stephen Kelly <steveire@gmail.com>
Date: Fri, 16 Jan 2015 19:21:36 +0100
Subject: [PATCH] Features: Adjust cxx_variadic_templates unit test for
 SolarisStudio.

The change in commit 1f19ac4d (Features: Adjust cxx_variadic_templates
unit test for GNU < 4.7., 2015-01-11) pacified GNU 4.6, but leaves
SolarisStudio 12.4 complaining:

 "cxx_variadic_templates.cpp", line 5: Error: Partial specialization for Interface<Is...> has identical arguments.
 1 Error(s) detected.

Implement a preprocessor test for using the partial specialization
workaround needed by GNU 4.6.
---
 .../cxx_variadic_templates.cpp                | 27 ++++++++++++-------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/Tests/CompileFeatures/cxx_variadic_templates.cpp b/Tests/CompileFeatures/cxx_variadic_templates.cpp
index a80e157e6..e1f641b81 100644
--- a/Tests/CompileFeatures/cxx_variadic_templates.cpp
+++ b/Tests/CompileFeatures/cxx_variadic_templates.cpp
@@ -1,5 +1,23 @@
+#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) < 407)
+#define OLD_GNU
+#endif
+
+#ifdef OLD_GNU
 template<int... Is>
 struct Interface;
+#endif
+
+template<int I, int... Is>
+struct Interface
+#ifdef OLD_GNU
+                <I, Is...>
+#endif
+{
+  static int accumulate()
+  {
+    return I + Interface<Is...>::accumulate();
+  }
+};
 
 template<int I>
 struct Interface<I>
@@ -10,15 +28,6 @@ struct Interface<I>
   }
 };
 
-template<int I, int... Is>
-struct Interface<I, Is...>
-{
-  static int accumulate()
-  {
-    return I + Interface<Is...>::accumulate();
-  }
-};
-
 // Note: split this into a separate test if a
 // cxx_variadic_template_template_parameters feature is added.