From ab45e381e777d95f18ed90f2357b26f04fd40ed4 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Fri, 22 Nov 2019 11:48:31 +0000
Subject: [PATCH] Add gcc-5 gnu-mode tests. See
 https://github.com/boostorg/math/issues/272.

---
 .travis.yml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 5b38f3bc..e1cc617f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -88,6 +88,15 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      env: TOOLSET=gcc COMPILER=g++-5 CXXSTD=03,11,14,1z CXXSTD_DIALECT=cxxstd-dialect=gnu
+      addons:
+        apt:
+          packages:
+            - g++-5
+          sources:
+            - ubuntu-toolchain-r-test
+
     - os: linux
       env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=03,11,14,1z
       addons: