[build] Downgrade GCC support from 5.0 to 4.9

2 files changed, 11 insertions, 5 deletions

diff --git a/platform/android/README.md b/platform/android/README.md
index 7c28433d96..9b5029b8eb 100644
--- a/platform/android/README.md
+++ b/platform/android/README.md
@@ -40,13 +40,16 @@ These dependencies are required for all operating systems and all platform targe
   - NDK
   - LLDB
 
-- Modern C++ compiler that supports -std=c++14
+- Modern C++ compiler that supports `-std=c++14`\*
   - clang++ 3.5 or later or
-  - g++-5 or later
+  - g++-4.9 or later
 - [cURL](https://curl.haxx.se) (for build only)
 - [Node.js](https://nodejs.org/) or later (for build only)
 - [pkg-config](https://wiki.freedesktop.org/www/Software/pkg-config/) (for build only)
 
+**Note**: We partially support C++14 because GCC 4.9 does not fully implement the
+final draft of the C++14 standard. More information in [DEVELOPING.md](DEVELOPING.md).
+
 ##### Additional Dependencies for Linux
 
 _These instructions were tested on Ubuntu 16.04 LTS (aka Xenial Xerus)._
diff --git a/platform/linux/README.md b/platform/linux/README.md
index b6a3b9a446..8b8ac9d089 100644
--- a/platform/linux/README.md
+++ b/platform/linux/README.md
@@ -8,12 +8,15 @@ This process gives you a Linux desktop app built on a Linux host system.
 
 ### Build
 
-Install GCC 5+ if you are running Ubuntu 14.04 or older. Alternatively, you can also use [Clang 3.5+](http://llvm.org/apt/).
+Install GCC 4.9+ if you are running Ubuntu 14.04 or older. Alternatively, you can also use [Clang 3.5+](http://llvm.org/apt/).
 
     sudo add-apt-repository --yes ppa:ubuntu-toolchain-r/test
     sudo apt-get update
-    sudo apt-get install gcc-5 g++-5
-    export CXX=g++-5
+    sudo apt-get install gcc-4.9 g++-4.9
+    export CXX=g++-4.9
+
+**Note**: We partially support C++14 because GCC 4.9 does not fully implement the
+final draft of the C++14 standard. More information in [DEVELOPING.md](DEVELOPING.md).
 
 Ensure you have git and other build essentials: