release: 1.16.0 (#13438)

Signed-off-by: Alyssa Wilk <alyssar@chromium.org>

GOVERNANCE.md

@@ -87,6 +87,7 @@ or you can subscribe to the iCal feed [here](webcal://kubernetes.app.opsgenie.co
   * Remove the "Pending" tags and add dates to the top of the [release notes for this version](docs/root/version_history/current.rst).
   * Switch the [VERSION](VERSION) from a "dev" variant to a final variant. E.g., "1.6.0-dev" to
     "1.6.0".
+  * Update the [RELEASES](RELEASES.md) doc with the relevant dates.
   * Get a review and merge.
 * Wait for tests to pass on [master](https://dev.azure.com/cncf/envoy/_build).
 * Create a [tagged release](https://github.com/envoyproxy/envoy/releases). The release should

RELEASES.md

@@ -64,7 +64,7 @@ deadline of 3 weeks.
 | 1.13.0  | 2019/12/31 | 2020/01/20 |  +20 days  | 2021/01/20  |
 | 1.14.0  | 2020/03/31 | 2020/04/08 |   +8 days  | 2021/04/08  |
 | 1.15.0  | 2020/06/30 | 2020/07/07 |   +7 days  | 2021/07/07  |
-| 1.16.0  | 2020/09/30 |            |            |             |
+| 1.16.0  | 2020/09/30 | 2020/10/08 |   +8 days  | 2021/10/08  |
 | 1.17.0  | 2020/12/31 |            |            |             |
 
 

VERSION

@@ -1 +1 @@
-1.16.0-dev
+1.16.0

docs/root/install/building.rst

@@ -20,11 +20,13 @@ recent Linux including Ubuntu 18.04 LTS.
 
 Building Envoy has the following requirements:
 
-* GCC 7+ or Clang/LLVM 7+ (for C++14 support).
+* GCC 7+ or Clang/LLVM 7+ (for C++14 support). Clang/LLVM 9+ preferred where Clang is used (see below).
 * These :repo:`Bazel native <bazel/repository_locations.bzl>` dependencies.
 
 Please see the linked :repo:`CI <ci/README.md>` and :repo:`Bazel <bazel/README.md>` documentation
 for more information on performing manual builds.
+Please note that for Clang/LLVM 8 and lower, Envoy may need to be built with `--define tcmalloc=gperftools`
+as the new tcmalloc code is not guaranteed to compile with lower versions of Clang.
 
 .. _install_binaries: