From 1086795a55858ed0705fb99cd0ed40e7fb7b6461 Mon Sep 17 00:00:00 2001
From: Thomas Ferreira de Lima <tlima@princeton.edu>
Date: Mon, 16 Jul 2018 22:44:06 -0400
Subject: [PATCH] travis different c++ compilers for older OS

---
 .travis.yml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index a02388d96..66c1ef48a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,14 +3,21 @@ os: osx
 matrix:
   include:
   - osx_image: xcode9.3
+  env:
+    - MATRIX_EVAL=""
   - osx_image: xcode8.3
+  env:
+    - MATRIX_EVAL="brew install gcc && CC=gcc-7 && CXX=g++-7"
   - osx_image: xcode7.3
+  env:
+    - MATRIX_EVAL="brew install gcc && CC=gcc-7 && CXX=g++-7"
 
 before_install:
   - rvm install 2.2.6
   - gem install dropbox-deployment
   - brew update
   - brew bundle
+  - eval "${MATRIX_EVAL}"
   - env
 
 install: