Simplify OS types for travis

.travis.yml

@@ -1,16 +1,33 @@
 language: cpp
 
-os:
-  - linux
-  - osx
-  
-compiler:
-  - gcc
-env:
-  matrix:
-    - GCC_VER="4.9"
-    - GCC_VER="5"
 
+addons:
+  apt:
+    sources: 
+      - ubuntu-toolchain-r-test
+    packages:
+      - g++-4.9
+      - g++-5
+      
+matrix:
+  include:
+    - os: linux
+      sudo: required
+      env: GCC_VER="4.9"
+      compiler: gcc
+    - os: linux
+      sudo: required
+      env: 
+        - GCC_VER="5"
+        - CPPCHECK=1
+        - COVERAGE=1
+        - FUZZY_CMD="-D RUN_FUZZY_TESTS:BOOL=TRUE"
+      compiler: gcc
+    - os: osx
+      compiler: clang
+
+  
+env:
   global:
     - secure: eiaR6pXiiEpyB8+LLQ1NvZdl0Yylru1BLy9lMoHl+IpUNGGQGywmW/2WAn77rFfmR1OPA2qWQLfgPwgK0HxUA9HHlot9tre5QhiN2Lw8NOT8tCZ6tTm2+QntDBjBGJyal/knRvQkn/6qs6GxlXRerz4ArnnuPL1vESt3zwB0YtU=
     # The next declaration is the encrypted COVERITY_SCAN_TOKEN, created
@@ -18,17 +35,12 @@ env:
 
 before_install:
   - export CXX="g++-$GCC_VER" CC="gcc-$GCC_VER" GCOV="gcov-$GCC_VER"
-  - if [ "$GCC_VER" = "5" ]; then export COVERAGE=1 CPPCHECK=1; fi
-  - if [ ${COVERAGE} = 1 ]; then export FUZZY_CMD="-D RUN_FUZZY_TESTS:BOOL=TRUE"; fi
-  - sudo pip install cpp-coveralls
-  - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
-  - sudo apt-get update
-  - sudo apt-get install -qq g++-$GCC_VER
+  - pip install --user cpp-coveralls
 
 script: 
-  - if [ ${COVERITY_SCAN_BRANCH} != 1 ]; then cmake -D ENABLE_COVERAGE:BOOL=TRUE -D CMAKE_BUILD_TYPE:STRING=Debug $FUZZY_CMD . ; fi
-  - if [ ${COVERITY_SCAN_BRANCH} != 1 ]; then make -j2 ; fi
-  - make test
+  - cmake -D ENABLE_COVERAGE:BOOL=TRUE -D CMAKE_BUILD_TYPE:STRING=Debug $FUZZY_CMD . 
+  - cmake --build . -- -j2
+  - ctest
   - if [ ${COVERAGE} = 1 ]; then bash <(curl -s https://raw.githubusercontent.com/codecov/codecov-bash/master/codecov) -x $GCOV -a "-s `pwd`" ; fi
 
 after_script: