Travis CI with Clang 3.4 and C++11

Question

Is it possible to get Travis CI working with Clang that is capable of C++11? (I want Clang, not GCC, I already have GCC 4.8 working in Travis CI.) It appears that the version th

Answer 1

Here is a part of my .travis.yml files (mostly taken from this file).

language: cpp

compiler:
  - clang
  - gcc

before_install:
  # g++4.8.1
  - if [ "$CXX" == "g++" ]; then sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test; fi

  # clang 3.4
  - if [ "$CXX" == "clang++" ]; then sudo add-apt-repository -y ppa:h-rayflood/llvm; fi

  - sudo apt-get update -qq

install:
  # g++4.8.1
  - if [ "$CXX" = "g++" ]; then sudo apt-get install -qq g++-4.8; fi
  - if [ "$CXX" = "g++" ]; then export CXX="g++-4.8"; fi

  # clang 3.4
  - if [ "$CXX" == "clang++" ]; then sudo apt-get install --allow-unauthenticated -qq clang-3.4; fi
  - if [ "$CXX" == "clang++" ]; then export CXX="clang++-3.4"; fi

script: 
  - $CXX --version

EDIT because it can be very useful to add libc++ for travis. Up to my knowledge, there is no Linux package for libc++, so one has to compile it "by hand". Do not forget -stdlib=libc++ in CXXFLAGS while compiling with clang.

install:
  # clang 3.4
  - if [ "$CXX" == "clang++" ]; then sudo apt-get install --allow-unauthenticated -qq clang-3.4; fi
  - if [ "$CXX" == "clang++" ]; then export CXXFLAGS="-std=c++0x -stdlib=libc++"; fi
  - if [ "$CXX" == "clang++" ]; then svn co --quiet http://llvm.org/svn/llvm-project/libcxx/trunk libcxx; fi

  - if [ "$CXX" == "clang++" ]; then cd libcxx/lib && bash buildit; fi
  - if [ "$CXX" == "clang++" ]; then sudo cp ./libc++.so.1.0 /usr/lib/; fi
  - if [ "$CXX" == "clang++" ]; then sudo mkdir /usr/include/c++/v1; fi
  - if [ "$CXX" == "clang++" ]; then cd .. && sudo cp -r include/* /usr/include/c++/v1/; fi
  - if [ "$CXX" == "clang++" ]; then cd /usr/lib && sudo ln -sf libc++.so.1.0 libc++.so; fi
  - if [ "$CXX" == "clang++" ]; then sudo ln -sf libc++.so.1.0 libc++.so.1 && cd $cwd; fi

  - if [ "$CXX" == "clang++" ]; then export CXX="clang++-3.4"; fi