[patch] Add SD-6 features test macros for recent libstdc++ changes

[Jonathan Wakely]

Subject says it all.

Tested ppc64le-linux, committing to trunk.



commit d7f997a59a1383b7f08618fbf1d7855edb5fa012
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Thu Aug 13 10:27:59 2015 +0100

    	* include/bits/alloc_traits.h: Add feature-test macro.
    	* include/bits/allocator.h: Likewise.
    	* include/bits/range_access.h: Likewise.
    	* include/bits/stl_map.h: Likewise.
    	* include/bits/unordered_map.h: Likewise.

diff --git a/libstdc++-v3/include/bits/alloc_traits.h b/libstdc++-v3/include/bits/alloc_traits.h
index e5ed92b..565b89b 100644
--- a/libstdc++-v3/include/bits/alloc_traits.h
+++ b/libstdc++-v3/include/bits/alloc_traits.h
@@ -36,6 +36,8 @@
 #include <bits/ptr_traits.h>
 #include <ext/numeric_traits.h>
 
+#define __cpp_lib_allocator_traits_is_always_equal 201411
+
 namespace std _GLIBCXX_VISIBILITY(default)
 {
 _GLIBCXX_BEGIN_NAMESPACE_VERSION
diff --git a/libstdc++-v3/include/bits/allocator.h b/libstdc++-v3/include/bits/allocator.h
index c7a2503..6fd3214 100644
--- a/libstdc++-v3/include/bits/allocator.h
+++ b/libstdc++-v3/include/bits/allocator.h
@@ -78,6 +78,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       // 2103. std::allocator propagate_on_container_move_assignment
       typedef true_type propagate_on_container_move_assignment;
 
+#define __cpp_lib_allocator_is_always_equal 201411
       typedef true_type is_always_equal;
 #endif
     };
diff --git a/libstdc++-v3/include/bits/range_access.h b/libstdc++-v3/include/bits/range_access.h
index 586d162..aa78afb 100644
--- a/libstdc++-v3/include/bits/range_access.h
+++ b/libstdc++-v3/include/bits/range_access.h
@@ -223,6 +223,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 #endif // C++14
 
 #if __cplusplus > 201402L
+#define __cpp_lib_nonmember_container_access 201411
 
   /**
    *  @brief  Return the size of a container.
diff --git a/libstdc++-v3/include/bits/stl_map.h b/libstdc++-v3/include/bits/stl_map.h
index 68ab6da..dff9f9c 100644
--- a/libstdc++-v3/include/bits/stl_map.h
+++ b/libstdc++-v3/include/bits/stl_map.h
@@ -591,7 +591,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 					     std::forward<_Args>(__args)...);
 	}
 #endif
+
 #if __cplusplus > 201402L
+#define __cpp_lib_map_try_emplace 201411
       /**
        *  @brief Attempts to build and insert a std::pair into the %map.
        *
@@ -708,6 +710,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
           return __i;
         }
 #endif
+
       /**
        *  @brief Attempts to insert a std::pair into the %map.
 
@@ -805,6 +808,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
         { _M_t._M_insert_unique(__first, __last); }
 
 #if __cplusplus > 201402L
+#define __cpp_lib_map_insertion 201411
       /**
        *  @brief Attempts to insert or assign a std::pair into the %map.
        *  @param __k    Key to use for finding a possibly existing pair in
diff --git a/libstdc++-v3/include/bits/unordered_map.h b/libstdc++-v3/include/bits/unordered_map.h
index 15d4b8b..1b90459 100644
--- a/libstdc++-v3/include/bits/unordered_map.h
+++ b/libstdc++-v3/include/bits/unordered_map.h
@@ -412,6 +412,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 
 
 #if __cplusplus > 201402L
+#define __cpp_lib_unordered_map_try_emplace 201411
       /**
        *  @brief Attempts to build and insert a std::pair into the
        *  %unordered_map.
@@ -617,6 +618,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 
 
 #if __cplusplus > 201402L
+#define __cpp_lib_unordered_map_insertion 201411
       /**
        *  @brief Attempts to insert a std::pair into the %unordered_map.
        *  @param __k    Key to use for finding a possibly existing pair in