Add macOS builds to .travis.yml (#389)

.travis.yml

@@ -6,8 +6,6 @@ env:
   global:
     - /usr/local/bin:$PATH
 
-# NOTE: The COMPILER variable is unused. It simply makes the display on
-# travis-ci.org more readable.
 matrix:
   include:
     - compiler: gcc
@@ -98,7 +96,7 @@ matrix:
       env:
         - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
         - LIBCXX_BUILD=1 LIBCXX_SANITIZER="Undefined;Address"
-            - EXTRA_FLAGS="-stdlib=libc++ -fno-omit-frame-pointer -g -O2 -fsanitize=undefined,address -fno-sanitize-recover=all"
+        - EXTRA_FLAGS="-stdlib=libc++ -g -O2 -fno-omit-frame-pointer -fsanitize=undefined,address -fno-sanitize-recover=all"
         - UBSAN_OPTIONS=print_stacktrace=1
     # Clang w/ libc++ and MSAN
     - compiler: clang
@@ -121,6 +119,17 @@ matrix:
         - LIBCXX_BUILD=1 LIBCXX_SANITIZER=Thread
         - EXTRA_FLAGS="-stdlib=libc++ -g -O2 -fno-omit-frame-pointer -fsanitize=thread -fno-sanitize-recover=all"
 
+    - os: osx
+      osx_image: xcode8.3
+      compiler: clang
+      env:
+        - COMPILER=clang++                          BUILD_TYPE=Debug
+    - os: osx
+      osx_image: xcode8.3
+      compiler: clang
+      env:
+        - COMPILER=clang++                          BUILD_TYPE=Release
+
 before_script:
   - if [ -z "$BUILD_32_BITS" ]; then
       export BUILD_32_BITS=OFF && echo disabling 32 bit build;
@@ -140,11 +149,9 @@ install:
 script:
   - cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_CXX_FLAGS="${EXTRA_FLAGS}" -DBENCHMARK_BUILD_32_BITS=${BUILD_32_BITS} ..
   - make
-    - make CTEST_OUTPUT_ON_FAILURE=1 test
+  - ctest -C ${BUILD_TYPE} --output-on-failure
 
 after_success:
   - if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
       coveralls --include src --include include --gcov-options '\-lp' --root .. --build-root .;
     fi
-
-sudo: required