Build with linux/clang; try building on osx/clang.

diff --git a/.travis.yml b/.travis.yml
index f06e5ac..c1c9ae5 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,17 @@
 matrix:
     include:
-        - os: linux
+        -
+            os: linux
+            compiler: gcc
+    include:
+        -
+            os: linux
+            compiler: clang
+    include:
+        -
+            os: osx
+            env: HOMEBREW_NO_AUTO_UPDATE=1
+            compiler: clang
 
 addons:
     apt: