From 493e3ba9de5d8405ebe1a255963fd85700dcbe27 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Sun, 21 May 2017 09:33:14 +0100
Subject: [PATCH] We should have at least one set of tests that enable GNU
 extensions.

---
 .travis.yml | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 11e03535..80947ceb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -147,6 +147,42 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=gnu++03
+      addons:
+        apt:
+          packages:
+            - g++-6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=gnu++11
+      addons:
+        apt:
+          packages:
+            - g++-6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=gnu++14
+      addons:
+        apt:
+          packages:
+            - g++-6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=gnu++1z
+      addons:
+        apt:
+          packages:
+            - g++-6
+          sources:
+            - ubuntu-toolchain-r-test
+
     - os: linux
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=c++03