travis-ci: Fix for non-sticky clang env setting.

The env CC=clang builds were previously getting overridden for each build since
the language: cpp defaults gcc/g++ (travis-ci was not building UPM w/clang).
This commit explicitly adds the clang compiler to the build matrix.

    * Specify gcc/clang in the compiler directive

    * Add a node.js 0.10 entry

    * Add a few debug messages

    * General cleanup of .travis.yml

    * Add the upm make install step for completeness

Signed-off-by: Noel Eck <noel.eck@intel.com>

.travis.yml

@@ -1,10 +1,21 @@
 language: cpp
 env:
-  - CC=gcc CXX=gcc
-  - CC=clang CXX=clang++
+  global:
+    - MRAA_ROOT=/tmp/mraa
+    - MRAA_BUILD=$MRAA_ROOT/build
+    - MRAA_INSTALL=$MRAA_ROOT/install
+    - UPM_ROOT=$TRAVIS_BUILD_DIR
+    - UPM_BUILD=$UPM_ROOT/build
+    - UPM_INSTALL=$UPM_ROOT/install
+    - JAVA_HOME=/usr/lib/jvm/java-8-oracle
+  matrix:
+    - NODE010=true
+    - NODE012=true
     - NODE4=true
     - NODE5=true
-  - NODE012=true
+compiler:
+  - clang
+  - gcc
 install:
   - sudo add-apt-repository --yes ppa:fenics-packages/fenics-exp/swig
   - sudo apt-get update -qq
@@ -12,27 +23,24 @@ install:
   - sudo ln -s /usr/bin/swig3.0 /usr/bin/swig
   - sudo update-java-alternatives -s java-8-oracle
 before_script:
-  - export NODE_ROOT_DIR="/home/travis/.nvm/v0.10.36"
-  - if [ "$CC" = "gcc" ]; then export BUILDJAVA=ON; else export BUILDJAVA=OFF; fi
-  - export JAVA_HOME=/usr/lib/jvm/java-8-oracle
-  - if [ "${NODE4}" ]; then nvm install 4.1; export CC=gcc-4.8; export CXX=g++-4.8; export NODE_ROOT_DIR="/home/travis/.nvm/versions/node/`nvm version`"; fi
-  - if [ "${NODE5}" ]; then nvm install 5; export CC=gcc-4.8; export CXX=g++-4.8; export NODE_ROOT_DIR="/home/travis/.nvm/versions/node/`nvm version`"; fi
-  - if [ "${NODE012}" ]; then nvm install 0.12; export NODE_ROOT_DIR="/home/travis/.nvm/versions/node/`nvm version`"; fi
+  # Turn off JAVA SWIG for clang++, use 4.8 for all g++ builds
+  - if [ "$CC" == "gcc" ]; then export BUILDJAVA=ON; export CC=gcc-4.8; export CXX=g++-4.8; else export BUILDJAVA=OFF; fi
+  - if [ "${NODE012}" ]; then nvm install 0.12; fi
+  - if [ "${NODE4}" ]; then nvm install 4.1; fi
+  - if [ "${NODE5}" ]; then nvm install 5; fi
+  # Handle 0.10 NODE_ROOT_DIR differently than other versions
+  - if [ -z ${NODE010} ]; then export NODE_ROOT_DIR="/home/travis/.nvm/versions/node/`nvm version`"; else export NODE_ROOT_DIR=/home/travis/.nvm/v0.10.36; fi
 script:
-  - git clone https://github.com/intel-iot-devkit/mraa.git
-  - cd mraa && mkdir build && cd build && cmake -DBUILDSWIGJAVA=$BUILDJAVA -DBUILDSWIGNODE=OFF -DBUILDSWIGPYTHON=OFF -DFIRMATA=ON -DENABLEEXAMPLES=OFF -DCMAKE_INSTALL_PREFIX:PATH=. .. && make && make install
-  - export PKG_CONFIG_PATH=$PWD/lib/pkgconfig:$PWD/lib/x86_64-linux-gnu/pkgconfig
-  - export CPLUS_INCLUDE_PATH=$PWD/include
-  - export LIBRARY_PATH=$PWD/lib:$PWD/lib/x86_64-linux-gnu
-  - cd ../.. && mkdir build && cd build && cmake -DNODE_ROOT_DIR:PATH="${NODE_ROOT_DIR}" -DBUILDSWIGJAVA=$BUILDJAVA -DBUILDEXAMPLES=ON -DBUILDJAVAEXAMPLES=$BUILDJAVA .. && make
+  - echo "CC=$CC BUILDJAVA=$BUILDJAVA NODE010=$NODE010 NODE012=$NODE012 NODE4=$NODE4 NODE5=$NODE5 NODE_ROOT_DIR=$NODE_ROOT_DIR"
+  - git clone https://github.com/intel-iot-devkit/mraa.git $MRAA_ROOT
+  - mkdir -p $MRAA_BUILD && cd $_ && cmake -DBUILDSWIGJAVA=$BUILDJAVA -DBUILDSWIGNODE=OFF -DBUILDSWIGPYTHON=OFF -DFIRMATA=ON -DENABLEEXAMPLES=OFF -DCMAKE_INSTALL_PREFIX:PATH=$MRAA_INSTALL $MRAA_ROOT && make install
+  - cd $UPM_ROOT && mkdir $UPM_BUILD && cd $_ && PKG_CONFIG_PATH=$MRAA_INSTALL/lib/pkgconfig cmake -DNODE_ROOT_DIR:PATH="${NODE_ROOT_DIR}" -DBUILDSWIGJAVA=$BUILDJAVA -DBUILDEXAMPLES=ON -DBUILDJAVAEXAMPLES=$BUILDJAVA -DCMAKE_INSTALL_PREFIX:PATH=$UPM_INSTALL .. && make install
 addons:
   apt:
     sources:
-      - llvm-toolchain-precise-3.6
       - ubuntu-toolchain-r-test
       - george-edison55-precise-backports
     packages:
-      - clang-3.6
-      - g++-4.8
       - cmake
       - cmake-data
+      - g++-4.8