.travis.yml

language: cpp
sudo: false
dist: trusty
os:
  - linux
  - osx
compiler:
  - clang
  - gcc
env:
  global:
    - CTEST_OUTPUT_ON_FAILURE=ON
  matrix:
    - BOOST_VERSION=1.65.1 CXX_STD=14
    - BOOST_VERSION=1.65.1 CXX_STD=11
    - BOOST_VERSION=1.57.0 CXX_STD=14
    - BOOST_VERSION=1.57.0 CXX_STD=11

addons:
  apt:
    sources:
      - ubuntu-toolchain-r-test
    packages:
      - g++-5       # We cannot build with GCC 4.8 (nor 4.9) due to our void_type alias template
      - libc++-dev  # Clang has problems with libstdc++-dev 4.8 when building for C++14
      - ninja-build # Faster than make and less noisy output (in combination with CMake)

cache:
  directories:
    - ${TRAVIS_BUILD_DIR}/deps/boost-1.57.0
    - ${TRAVIS_BUILD_DIR}/deps/boost-1.65.1

install:
  - if [[ "${TRAVIS_OS_NAME}" = "osx" ]]; then brew update && brew install ninja; fi
  - |
    if [[ "${TRAVIS_OS_NAME}" = "linux" ]]; then
      # Fetch Boost
      export BOOST_ROOT="${TRAVIS_BUILD_DIR}/deps/boost-${BOOST_VERSION}"
      if [[ ! -f "${BOOST_ROOT}/boost/version.hpp" ]]; then
        mkdir -p "${BOOST_ROOT}"
        travis_retry wget -O - http://sourceforge.net/projects/boost/files/boost/${BOOST_VERSION}/boost_${BOOST_VERSION//\./_}.tar.gz | tar --strip-components=1 -x -z -C "${BOOST_ROOT}"
      fi
      # Select our compiler
      if [[ "${CXX}" =~ "g++" ]] && which g++-5 > /dev/null; then
        export CXX=g++-5
      elif [[ "${CXX}" =~ "clang" ]]; then
        export CXXFLAGS="-stdlib=libc++" LDFLAGS="-stdlib=libc++"
      fi
    fi

script:
 - cmake -E make_directory build
 - cmake -E chdir build cmake -G Ninja -DCMAKE_CXX_STANDARD="${CXX_STD}" ..
 - cmake --build build
 - cmake --build build --target test