Addendum

.travis.yml

@@ -8,10 +8,10 @@ matrix:
         sources:
         - ubuntu-toolchain-r-test
         packages:
-        - g++-8
+        - g++-7
         - libssl-dev
         - libcrypto++-dev
-    env: ENV_CXX=g++-8 ENV_CC=gcc-8
+    env: ENV_CXX=g++-7 ENV_CC=gcc-7
 before_script:
 - wget https://github.com/sbx320/premake5-travis/blob/master/premake5?raw=true -O
   ./premake5 && chmod +x ./premake5 && ./premake5 gmake && cd Build