Travis test
diff --git a/.travis.yml b/.travis.yml index 65fdb4a..9c733f5 100644 --- a/.travis.yml +++ b/.travis.yml
@@ -8,9 +8,11 @@ language: cpp addons: apt: + sources: + - ubuntu-toolchain-r-test packages: - - gcc-7 - - g++-7 + - gcc-6 + - g++-6 - cmake