Mention the expected change to default -std= in future clang releases.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_50@312293 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index c78b407..6e8b005 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -148,6 +148,12 @@
C++ Language Changes in Clang
-----------------------------
+- We expect this to be the last Clang release that defaults to ``-std=gnu++98``
+ when using the GCC-compatible ``clang++`` driver. From Clang 6 onwards we
+ expect to use ``-std=gnu++14`` or a later standard by default, to match the
+ behavior of recent GCC releases. Users are encouraged to change their build
+ files to explicitly specify their desired C++ standard.
+
- Support for the C++17 standard has been completed. This mode can be enabled
using ``-std=c++17`` (the old flag ``-std=c++1z`` is still supported for
compatibility).
