From a1b748f5f40a259394287c278de82f022e793a79 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Verschelde?= <rverschelde@gmail.com>
Date: Wed, 18 Jul 2018 17:38:40 +0200
Subject: [PATCH] Travis: Install libstdc++ >= 4.9 for clang-format-6.0

(cherry picked from commit 22b176f69de00815064c69bb975ff40b0b5dc5b9)
---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 0d459430510..133a134758d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,8 +24,10 @@ matrix:
         apt:
           sources:
             - llvm-toolchain-trusty-6.0
+            - ubuntu-toolchain-r-test
           packages:
             - clang-format-6.0
+            - libstdc++6 # >= 4.9 needed for clang-format-6.0
 
         coverity_scan:
           project: