Travis CI: build with CUDA

.travis.yml

@@ -6,13 +6,20 @@ matrix:
     include:
         - os: linux
           dist: trusty
+          sudo: required
+          env: CUDA=ON
         - os: osx
           osx_image: xcode8.3
+          env: CUDA=OFF
 cache:
-    ccache: true
     directories:
         - $HOME/.hunter
+before_install:
+    - if [[ "$CUDA" = ON ]]; then source scripts/install-cuda-trusty.sh; fi
 script:
-    - cmake -DHUNTER_JOBS_NUMBER=4 -DETHASHCUDA=Off -DETHSTRATUM=On -DETHASHCL=On -H. -Bbuild
+    - cmake -DHUNTER_JOBS_NUMBER=4 -DETHASHCUDA=$CUDA -DETHSTRATUM=ON -DETHASHCL=ON -H. -Bbuild
     - cmake --build build
-    - build/ethminer/ethminer --list-devices -G
+    - build/ethminer/ethminer --list-devices -G
+    - build/ethminer/ethminer --list-devices -U
+    - if [ "$TRAVIS_OS_NAME" = linux ]; then ldd build/ethminer/ethminer; fi
+    - if [ "$TRAVIS_OS_NAME" = osx ]; then otool -L build/ethminer/ethminer; fi

scripts/install-cuda-trusty.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+#
+# Install the core CUDA toolkit for a ubuntu-trusty (14.04) system. Requires the
+# CUDA environment variable to be set to the required version.
+#
+# Since this script updates environment variables, to execute correctly you must
+# 'source' this script, rather than executing it in a sub-process.
+#
+# Taken from https://github.com/tmcdonell/travis-scripts.
+
+export CUDA=8.0.61-1
+travis_retry wget http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64/cuda-repo-ubuntu1404_${CUDA}_amd64.deb
+travis_retry sudo dpkg -i cuda-repo-ubuntu1404_${CUDA}_amd64.deb
+travis_retry sudo apt-get update -qq
+export CUDA_APT=${CUDA:0:3}
+export CUDA_APT=${CUDA_APT/./-}
+travis_retry sudo apt-get install -y cuda-drivers cuda-core-${CUDA_APT} cuda-cudart-dev-${CUDA_APT} cuda-cufft-dev-${CUDA_APT}
+travis_retry sudo apt-get clean
+export CUDA_HOME=/usr/local/cuda-${CUDA:0:3}
+export LD_LIBRARY_PATH=${CUDA_HOME}/lib64:${LD_LIBRARY_PATH}
+export PATH=${CUDA_HOME}/bin:${PATH}