Add test build on gcc-9 (#167)

etr · web-flow · commit 84438c4a348f · 2019-11-10T16:08:44.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -241,6 +241,15 @@ matrix:
             - g++-8
       env:
         - MATRIX_EVAL="CC=gcc-8 && CXX=g++-8"
+    - os: linux
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-9
+      env:
+        - MATRIX_EVAL="CC=gcc-9 && CXX=g++-9"
     - os: linux
       addons:
         apt:
