From 15500ebba10be1b6b1c09a1c3792aeb11dd10340 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Thu, 2 Nov 2017 18:48:57 +0200
Subject: [PATCH] Add missing addons: line

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

diff --git a/.travis.yml b/.travis.yml
index f03b44d..2144c95 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,6 +31,7 @@ matrix:
     - os: linux
       compiler: clang++
       env: TOOLSET=clang CXXSTD=03,11,14,1z
+      addons:
         apt:
           packages:
             - libstdc++-4.9-dev