Clang 9 support (etr#168)

etr · web-flow · commit e0fd7a27568c · 2019-11-10T21:02:02.000-08:00
* add support for clang-9

* Adding travis sourceline to support clang9
diff --git a/.travis.yml b/.travis.yml
@@ -393,6 +393,18 @@ matrix:
             - clang-8
       env:
         - MATRIX_EVAL="CC=clang-8 && CXX=clang++-8"
+    - os: linux
+      addons:
+        apt:
+          sources:
+            - llvm-toolchain-xenial-9
+            - ubuntu-toolchain-r-test
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main'
+              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+          packages:
+            - clang-9
+      env:
+        - MATRIX_EVAL="CC=clang-9 && CXX=clang++-9"
     - os: linux
       compiler: clang
       addons:
