#!/bin/bash

set -ex

BUILD_DIR=${TRAVIS_BUILD_DIR}

mkdir -p "${DEPENDENCY_DIR}" && cd "${DEPENDENCY_DIR}"


# --- CMake
CMAKE_INSTALLER=install-cmake.sh

if [[ ! -f ${CMAKE_INSTALLER} ]]
then
    curl -sSL https://cmake.org/files/v3.8/cmake-3.8.2-Linux-x86_64.sh -o ${CMAKE_INSTALLER}
    chmod +x ${CMAKE_INSTALLER}
fi

sudo ./${CMAKE_INSTALLER} --prefix=/usr/local --skip-license
cmake --version


cd ${DEPENDENCY_DIR}


# --- 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

        if [[ -z "${BUILD_32_BITS}" ]]
        then
            export BUILD_32_BITS=OFF
            echo disabling 32 bit build
        fi

        mkdir -p build && cd build

        cmake -DCMAKE_C_COMPILER=${CC} \
                -DCMAKE_BUILD_TYPE=RelWithDebInfo \
                -DCMAKE_INSTALL_PREFIX=/usr \
                -DLIBCXX_ABI_UNSTABLE=ON \
                -DLLVM_BUILD_32_BITS=${BUILD_32_BITS} \
                ../llvm-source
        make cxx -j4
    else
        cd build
    fi

    sudo make install-cxxabi install-cxx
fi


cd ${BUILD_DIR}