sudo: false

language: cpp

os:
  - linux
  - osx

compiler:
  - gcc
  - clang

cache:
  - ccache

env:
  - THREADING="serial"
  - THREADING="openmp"
  - THREADING="pthread"

# Apple GCC does not support OpenMP.  GCC with OpenMP requires Homebrew.
# Apple Clang does not support OpenMP.  Clang with OpenMP requires Homebrew.
matrix:
  exclude:
    - os: osx
      env: THREADING="openmp"
    - os: osx
      compiler: gcc

before_script:
  - if [[ ${TRAVIS_OS_NAME} == "osx" ]]; then
      brew update;
      export HOMEBREW_NO_AUTO_UPDATE=1;
      brew ls --versions ccache   > /dev/null || brew install ccache;
      export PATH=/usr/local/opt/ccache/libexec:$PATH;
    fi
  - ccache -z

script:
  - export OMP_NUM_THREADS=2
  - export OMP_PLACES=threads
  - export OMP_PROC_BIND=spread
  # LD_LIBRARY_PATH workaround to find clang's libomp: https://github.com/travis-ci/travis-ci/issues/8613 
  - if [[ ${CC} = clang ]]; then export LD_LIBRARY_PATH=/usr/local/clang/lib${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH; fi
  # enable ccache for clang on linux and add CCACHE_CPP2 to avoid 'Argument unused during compilation -I...' warning
  - if [[ ${TRAVIS_OS_NAME} = linux && ${CC} = clang ]]; then
      ln -s /usr/bin/ccache $HOME/bin/clang++;
      export CCACHE_CPP2=yes;
      GENERATE_OPTS="--gcc-toolchain=/usr";
    fi
  - mkdir build
  - cd build
  - ../generate_makefile.bash --compiler=$CXX --with-$THREADING --with-options=compiler_warnings --cxxflags="-O3 -Werror" ${GENERATE_OPTS}
  - make
  - make test

after_success:
  - ccache -s