Travis CI: bump OS X and XCode version.

diff --git a/.travis.yml b/.travis.yml
index fc6cd1a..7a97971 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,10 @@ os:
 sudo: required
 dist: trusty
 
+# Use OS X 10.11 with XCode 7.2
+# https://docs.travis-ci.com/user/osx-ci-environment/#OS-X-Version
+osx_image: xcode7.2
+
 env:
   # Each line is a set of environment variables set before a build.
   # Thus each line represents a different build configuration.
@@ -39,8 +43,8 @@ addons:
       - ninja-build
 
 before_install:
-  # Install ninja on Mac OS X.
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update && brew install ninja; fi
+  # Install cmake & ninja on Mac OS X.
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update && brew install cmake ninja; fi
 
 before_script:
   - git clone https://github.com/KhronosGroup/SPIRV-Headers.git external/spirv-headers