From 92d8a3dacdc5071c1d8b0a802c20e8c93452bc8f Mon Sep 17 00:00:00 2001
From: Thomas Ferreira de Lima <tlima@princeton.edu>
Date: Wed, 1 Aug 2018 15:57:35 -0400
Subject: [PATCH] Using C++11 std library on macOS.

---
 .travis.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index a95cfe66d..7e1f3e308 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,14 +4,17 @@ matrix:
       osx_image: xcode9.3  # macOS 10.13
       env:
         - MATRIX_EVAL=""
+        - ARCHFLAGS="-std=c++11"
     - os: osx
       osx_image: xcode8.3  # macOS 10.12
       env:
         - MATRIX_EVAL=""
+        - ARCHFLAGS="-std=c++11"
     - os: osx
       osx_image: xcode8  # macOS 10.11
       env:
         - MATRIX_EVAL=""
+        - ARCHFLAGS="-std=c++11"
     - os: linux
       dist: trusty # Ubuntu 14.04
       sudo: false