Add OS X and CUDA builds to Travis-CI config

For the CUDA build, the CUDA platform is compiled, but the
tests are not run (no GPU). For OS X, the OpenCL platform
is also compiled, but not tested (we skip Apple CPU OpenCL).

.travis.yml

@@ -7,11 +7,14 @@ addons:
       - doxygen
       - python-numpy
       - python-scipy
+      - libfftw3-dev
 
 matrix:
   include:
     - sudo: required
-      env: OPENCL=true
+      env: ==CPU_OPENCL==
+           OPENCL=true
+           CUDA=false
            CC=gcc
            CXX=g++
            CMAKE_FLAGS="
@@ -28,33 +31,73 @@ matrix:
            -DOPENMM_BUILD_EXAMPLES=OFF"
       addons: {apt: {packages: []}}
 
+    - sudo: required
+      env: ==CUDA_COMPILE==
+           CUDA=true
+           OPENCL=false
+           CUDA_VERSION="7.0-28"
+           CMAKE_FLAGS="
+             -DOPENMM_BUILD_CUDA_TESTS=OFF
+             -DOPENMM_BUILD_OPENCL_TESTS=OFF
+             -DOPENMM_BUILD_PYTHON_WRAPPERS=OFF
+             -DOPENMM_BUILD_REFERENCE_TESTS=OFF
+             -DOPENMM_BUILD_SERIALIZATION_TESTS=OFF
+             -DOPENMM_BUILD_C_AND_FORTRAN_WRAPPERS=OFF
+             -DOPENMM_BUILD_EXAMPLES=OFF
+             -DOPENCL_LIBRARY=/usr/local/cuda-7.0/lib64/libOpenCL.so"
+      addons: {apt: {packages: []}}
+
+    - language: objective-c
+      os: osx
+      env: ==OSX==
+           OPENCL=false
+           CUDA=false
+           CMAKE_FLAGS="
+             -DOPENMM_BUILD_OPENCL_TESTS=OFF
+             -DSWIG_EXECUTABLE=/usr/local/Cellar/swig/3.0.2/bin/swig"
+      addons: {apt: {packages: []}}
+
     - sudo: false
       python: 2.7_with_system_site_packages
-      env: OPENCL=false
+      env: ==STATIC_LIB==
+           OPENCL=false
+           CUDA=false
            CC=clang
            CXX=clang++
            CMAKE_FLAGS="-DOPENMM_BUILD_STATIC_LIB=ON"
 
     - sudo: false
       python: 2.7_with_system_site_packages
-      env: OPENCL=false
+      env: ==PYTNON_2==
+           OPENCL=false
+           CUDA=false
            CC=clang
            CXX=clang++
-           CMAKE_FLAGS="-DOPENMM_BUILD_STATIC_LIB=OFF"
+           CMAKE_FLAGS=""
 
     - sudo: false
       python: 3.4
-      env: OPENCL=false
+      env: ==PYTHON_3==
+           OPENCL=false
+           CUDA=false
            CC=gcc
            CXX=g++
-           CMAKE_FLAGS="-DOPENMM_BUILD_STATIC_LIB=OFF"
+           CMAKE_FLAGS=""
 
 before_install:
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+      brew install doxygen swig fftw;
+      sudo easy_install pytest;
+    fi
   - if [[ "$OPENCL" == "true" ]]; then
-      sudo apt-get -yq update &>> ~/apt-get-update.log;
+      sudo apt-get -yq update > /dev/null 2>&1 ;
       sudo apt-get install -qq fglrx=2:8.960-0ubuntu1 opencl-headers;
     fi
-  - if [[ "$OPENCL" == "false" ]]; then
+  # Install swig for Python wrappers. However, testing CUDA and OpenCL, we
+  # skip the Python wrapper for speed. We're not using anaconda python,
+  # but this is a fast way to get an apparently functional precompiled
+  # build of swig that's more modern than what's in apt.
+  - if [[ "$OPENCL" == "false" && "$CUDA" == "false" && "$TRAVIS_OS_NAME" == "linux" ]]; then
       wget https://anaconda.org/anaconda/swig/3.0.2/download/linux-64/swig-3.0.2-0.tar.bz2;
       mkdir $HOME/swig;
       tar -xjvf swig-3.0.2-0.tar.bz2 -C $HOME/swig;
@@ -62,14 +105,30 @@ before_install:
       export SWIG_LIB=$HOME/swig/share/swig/3.0.2;
     fi
 
+  - if [[ "$CUDA" == "true" ]]; then
+      wget "http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1204/x86_64/cuda-repo-ubuntu1204_${CUDA_VERSION}_amd64.deb";
+      sudo dpkg -i cuda-repo-ubuntu1204_${CUDA_VERSION}_amd64.deb;
+      sudo apt-get update -qq;
+      export CUDA_APT=${CUDA_VERSION%-*};
+      export CUDA_APT=${CUDA_APT/./-};
+      sudo apt-get install -y cuda-drivers cuda-core-${CUDA_APT} cuda-cudart-dev-${CUDA_APT} cuda-cufft-dev-${CUDA_APT};
+      sudo apt-get clean;
+      export CUDA_HOME=/usr/local/cuda-${CUDA_VERSION%%-*};
+      export LD_LIBRARY_PATH=${CUDA_HOME}/lib64:${LD_LIBRARY_PATH};
+      export PATH=${CUDA_HOME}/bin:${PATH};
+    fi
+
 script:
   - CTEST_STOP_TIME=$(python -c "from datetime import datetime, timedelta; import sys; sys.stdout.write((datetime.now() + timedelta(minutes=25)).strftime('%H:%M:%S'))")
   - cmake . $CMAKE_FLAGS -DCMAKE_INSTALL_PREFIX=$HOME/OpenMM
-
   - make -j2 install
   - if [[ "$OPENCL" == "true" ]]; then ./TestOpenCLDeviceQuery; fi
-  - if [[ "$OPENCL" == "false" ]]; then
+  - if [[ "$OPENCL" == "false" && "$CUDA" == "false" ]]; then
+      if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+          sudo make PythonInstall;
+      else
           make PythonInstall;
+      fi;
       python -m simtk.testInstallation;
       (cd python/tests && py.test -v *);
     fi