Testing with docker instead.

.travis.yml

   directories:
     - ${DEPENDENCY_DIR}
 
+services:
+  - docker
+
 
 matrix:
     include:
             - libc++-dev
           sources: *sources
 
+before_install:
+  - docker pull jorj/clang5_qt5
+  - docker  run jorj/clang5_qt5 /bin/bash -c "${CXX} --version; cmake --version"
 
 install:
   - script/ci_install.sh

script/ci_install.sh

 
 
 # --- LibC++
-if [[ "${CXX}" = clang* ]]
-then
-    if [[ ! -d "${DEPENDENCY_DIR}/llvm-source" ]]
-    then
-        LLVM_RELEASE=release_50
-        git clone --depth=1 -b ${LLVM_RELEASE} https://github.com/llvm-mirror/llvm.git llvm-source
-        git clone --depth=1 -b ${LLVM_RELEASE} https://github.com/llvm-mirror/libcxx.git llvm-source/projects/libcxx
-        git clone --depth=1 -b ${LLVM_RELEASE} https://github.com/llvm-mirror/libcxxabi.git llvm-source/projects/libcxxabi
-    fi
-
-    mkdir -p build && cd build
-
-    cmake -DCMAKE_C_COMPILER=${CC} \
-        -DCMAKE_CXX_COMPILER=${CXX} \
-        -DCMAKE_BUILD_TYPE=RelWithDebInfo \
-        -DCMAKE_INSTALL_PREFIX=/usr \
-        -DLIBCXX_ABI_UNSTABLE=ON \
-        ../llvm-source
-    make cxx -j4
-
-    sudo make install-cxxabi install-cxx
-    rm -rf *
-fi
+#if [[ "${CXX}" = clang* ]]
+#then
+#    if [[ ! -d "${DEPENDENCY_DIR}/llvm-source" ]]
+#    then
+#        LLVM_RELEASE=release_50
+#        git clone --depth=1 -b ${LLVM_RELEASE} https://github.com/llvm-mirror/llvm.git llvm-source
+#        git clone --depth=1 -b ${LLVM_RELEASE} https://github.com/llvm-mirror/libcxx.git llvm-source/projects/libcxx
+#        git clone --depth=1 -b ${LLVM_RELEASE} https://github.com/llvm-mirror/libcxxabi.git llvm-source/projects/libcxxabi
+#    fi
+#
+#    mkdir -p build && cd build
+#
+#    cmake -DCMAKE_C_COMPILER=${CC} \
+#        -DCMAKE_CXX_COMPILER=${CXX} \
+#        -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+#        -DCMAKE_INSTALL_PREFIX=/usr \
+#        -DLIBCXX_ABI_UNSTABLE=ON \
+#        ../llvm-source
+#    make cxx -j4
+#
+#    sudo make install-cxxabi install-cxx
+#    rm -rf *
+#fi
 
 
 cd ${BUILD_DIR}