let's see how this work

.travis.yml

@@ -2,10 +2,8 @@ language: cpp
 addons:
     apt:
         sources:
-            - llvm-toolchain-precise-3.6
             - ubuntu-toolchain-r-test
         packages:
-            - clang-3.6
             - g++-5
             - gcc-5
 compiler:
@@ -18,6 +16,8 @@ matrix:
   exclude:
     - os: osx
       compiler: gcc
+    - os: osx
+      compiler: clang
 env:
   - SUBTARGET=arcade MAME=mamearcade64 LDOPTS="-Wl,-no-keep-memory"
   - SUBTARGET=mess   MAME=mess64