Setup travis for native compilation

Author: Antonio Alonso Dominguez

.travis.yml

@@ -11,6 +11,32 @@ before_install:
   - sed -e "s/^\\(127\\.0\\.0\\.1.*\\)/\\1 $(hostname | cut -c1-63)/" /etc/hosts > /tmp/hosts
   - sudo mv /tmp/hosts /etc/hosts
   - cat /etc/hosts # optionally check the content *after*
+  - sudo apt-get -qq update
+  - sudo sh -c "echo 'deb http://llvm.org/apt/precise/ llvm-toolchain-precise-3.7 main' >> /etc/apt/sources.list"
+  - sudo sh -c "echo 'deb http://llvm.org/apt/precise/ llvm-toolchain-precise main' >> /etc/apt/sources.list"
+  - wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key | sudo apt-key add -
+  - sudo add-apt-repository --yes ppa:ubuntu-toolchain-r/test
+  - sudo apt-get -qq update
+  - |
+    sudo apt-get install -y \
+      clang++-3.7 \
+      llvm-3.7 \
+      llvm-3.7-dev \
+      llvm-3.7-runtime \
+      llvm-3.7-tool \
+      libgc-dev \
+      libunwind7-dev
+  # Install re2
+  # (libre2-dev) since Xenial (16.04 LTS) http://packages.ubuntu.com/xenial/libre2-dev
+  - sudo apt-get install -y make
+  - export CXX=clang++-3.7
+  - git clone https://code.googlesource.com/re2
+  - pushd re2
+  - git checkout 2017-03-01
+  - make -j4 test
+  - sudo make install prefix=/usr
+  - make testinstall prefix=/usr
+  - popd
 
 env:
   global: