travis test #2

.travis.yml

@@ -1,19 +1,27 @@
-sudo: require
-language: generic
-compiler: gcc
 dist: trusty
-
-before_install:
-  # C++17
-  - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
-  - sudo apt-get update -qq
-
-install: 
-  # C++17
-  - sudo apt-get install -qq g++-6
-  - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-6 90
-
-script: 
+sudo: required
+language:
+  - cpp
+compiler:
+  - gcc
+addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+    packages:
+      - gcc-6
+      - g++-6
+      - cmake
+script:
+  # Link gcc-6 and g++-6 to their standard commands
+  - ln -s /usr/bin/gcc-6 /usr/local/bin/gcc
+  - ln -s /usr/bin/g++-6 /usr/local/bin/g++
+  # Export CC and CXX to tell cmake which compiler to use
+  - export CC=/usr/bin/gcc-6
+  - export CXX=/usr/bin/g++-6
+  # Check versions of gcc, g++ and cmake
+  - gcc -v && g++ -v && cmake --version
+  # Run your build commands next
   - cmake -D CMAKE_C_COMPILER=gcc-6 -D CMAKE_CXX_COMPILER=g++-6 CMakeLists.txt
   - make
   - ./Introspector-generator