Merge commit '48097815'

* commit '48097815':
  travis: Exclude gcc for the macOS target
Merged-by: James Almer <jamrial@gmail.com>

.travis.yml

@@ -11,6 +11,10 @@ addons:
 compiler:
   - clang
   - gcc
+matrix:
+    exclude:
+        - os: osx
+          compiler: gcc
 cache:
   directories:
     - ffmpeg-samples