OK, just use clang

.travis.yml

@@ -20,18 +20,8 @@ script:
 notifications:
   email:
     on_success: never
-
-# Need gcc 4.7 for alignof/stdalign.h and we use multilib as we test both 32/64
-addons:
-  sources:
-    - ubuntu-toolchain-r-test
-  apt:
-    packages:
-      - gcc-4.7-multilib
 env:
-  - ARCH=x86_64 CC=gcc-4.7
   - ARCH=x86_64 CC=clang
-  - ARCH=i686 CC=gcc-4.7
   - ARCH=i686 CC=clang
 
 os: