Exclude clang from Travis and use g++-4.8

clang is missing libc++ (might add that later)

.travis.yml

@@ -2,35 +2,23 @@ language: cpp
 
 os:
   - linux
-  - osx
 
 compiler:
-  - clang
+  # - clang # disabled clang due to missing libc++
   - gcc
 
-matrix:
-  # This excludes OSX builds from the build matrix for gcc
-  exclude:
-    - os: osx
-      compiler: gcc
-
 notifications:
  email:
    on_success: change
    on_failure: always
 
 before_install:
-  - "if [ $CC = 'gcc' ]; then export CXX=g++; fi"
-  - "if [ $CC = 'clang' ]; then export CXX=clang++; fi"
-  - "if [ ${TRAVIS_OS_NAME:-'linux'} = 'osx' ]; then brew install cmake; fi"
-  # Install cpp-coveralls for reporting test coverage under only linux, see https://github.com/eddyxu/cpp-coveralls
-  #- "if [ ${TRAVIS_OS_NAME:-'linux'} = 'linux' ]; then sudo pip install cpp-coveralls; fi"
+  - if [ "$CXX" == "g++" ]; then sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test; fi
+  - if [ "$CXX" == "g++" ]; then sudo apt-get install -qq g++-4.8; fi
 
 install:
   - "mkdir -p $TRAVIS_BUILD_DIR/build/scripts"
   - "cd $TRAVIS_BUILD_DIR/build/scripts"
-  # Enable test coverage for travis-ci build
-  #- "cmake $TRAVIS_BUILD_DIR/src -DNTA_COV_ENABLED=ON"
   - "cmake $TRAVIS_BUILD_DIR"
 
 script:
@@ -39,10 +27,3 @@ script:
   # test compile-time constraints
   - "make test_sqlpp_constraints"
 
-after_success:
-  - "cd $TRAVIS_BUILD_DIR"
-  # Send test coverage report to http://coveralls.io under only linux
-  # - "if [ ${TRAVIS_OS_NAME:-'linux'} = 'linux' ]; then coveralls --exclude external --exclude doc --exclude src/test; fi"
-
-
-