[4.9] Switch gcc-4.9 to use google/gcc-4_9 branch.

This source drop uses svn version r212828 of google/gcc-4.9 branch.
We also cherry-picked r213062, r213063 and r213064 to fix windows
build issues.
All gcc-4.9 patches before July 3rd are ported to google/gcc-4.9.
The following prior commits has not been merged to google branch yet.
(They are included in this commit).
e7af147f979e657fe2df00808e5b4319b0e088c6,
baf87df3cb2683649ba7e9872362a7e721117c23, and
c231900e5dcc14d8296bd9f62b45997a49d4d5e7.

Change-Id: I4bea3ea470387ff751c2be4cb0d4a12059b9299b

1 files changed, 52 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/testsuite/g++.dg/cpp1y/pr59867.C b/gcc-4.9/gcc/testsuite/g++.dg/cpp1y/pr59867.C
new file mode 100644
index 000000000..91d025964
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/g++.dg/cpp1y/pr59867.C
@@ -0,0 +1,52 @@
+// PR c++/59867
+// { dg-do compile { target c++1y } }
+
+#include <iostream>
+using namespace std;
+
+// constant
+template<typename T, T x>
+  struct meta_value
+  {
+    typedef meta_value type;
+    typedef T value_type;
+    static const T value = x;
+  };
+
+// array
+template<typename T, T... data>
+  struct meta_array
+  {
+    typedef meta_array type;
+    typedef T item_type;
+  };
+
+// static array -> runtime array conversion utility
+template<typename T>
+  struct array_gen;
+
+template<typename T, T... xs>
+  struct array_gen<meta_array<T, xs...>>
+  {
+    static const T value[sizeof...(xs)];
+  };
+
+template<typename T, T... xs>
+  const T
+  array_gen<meta_array<T, xs...>>::value[sizeof...(xs)] = {xs...};
+
+// static string
+template<typename T, T... xs>
+  constexpr meta_array<T, xs...>
+  operator""_s()
+  {
+    static_assert(sizeof...(xs) == 3, "What's wrong with you?");
+    return meta_array<T, xs...>();
+  }
+
+int
+main()
+{
+  auto a = "123"_s;
+  const char (& xs)[3] = array_gen<decltype("123"_s)>::value;
+}