# Ubuntu 14.04 LTS Build and Install Instructions
The following dependencies were necessary for a clean install of Ubuntu 14.04 LTS:

    sudo apt-get install gcc-4.9 g++-4.9 cmake make libbz2-dev libdb++-dev libdb-dev libssl-dev openssl libreadline-dev autoconf libtool git

## Build Boost 1.57.0 

The Boost which ships with Ubuntu 15.04 is too old.  You need to download the Boost tarball for Boost 1.57.0
(Note, 1.58.0 requires C++14 and will not build on Ubuntu LTS; this requirement was an accident, see [this mailing list post](http://boost.2283326.n4.nabble.com/1-58-1-bugfix-release-necessary-td4674686.html)).

    BOOST_ROOT=$HOME/opt/boost_1_57_0
    sudo apt-get update
    sudo apt-get install autotools-dev build-essential g++ libbz2-dev libicu-dev python-dev
    wget -c 'http://sourceforge.net/projects/boost/files/boost/1.57.0/boost_1_57_0.tar.bz2/download' -O boost_1_57_0.tar.bz2
    [ $( sha256sum boost_1_57_0.tar.bz2 | cut -d ' ' -f 1 ) == "910c8c022a33ccec7f088bd65d4f14b466588dda94ba2124e78b8c57db264967" ] || ( echo 'Corrupt download' ; exit 1 )
    tar xjf boost_1_57_0.tar.bz2
    cd boost_1_57_0/
    ./bootstrap.sh "--prefix=$BOOST_ROOT"
    ./b2 install

## Installing Qt

Qt 5.5 is a dependency if you wish to build `light_client`.  Building it from source
requires the following dependencies on Ubuntu LTS:

    sudo apt-get install libxcb1 libxcb1-dev libx11-xcb1 libx11-xcb-dev libxcb-keysyms1 libxcb-keysyms1-dev libxcb-image0 libxcb-image0-dev libxcb-shm0 libxcb-shm0-dev libxcb-icccm4 libxcb-icccm4-dev libxcb-sync1 libxcb-sync-dev '^libxcb.*-dev'

Qt 5.5 can be built as follows:

    QT_ROOT=$HOME/opt/qt5.5.0

    wget http://download.qt.io/official_releases/qt/5.5/5.5.0/single/qt-everywhere-opensource-src-5.5.0.tar.gz
    [ $( sha256sum qt-everywhere-opensource-src-5.5.0.tar.gz | cut -d ' ' -f 1 ) == "bf3cfc54696fe7d77f2cf33ade46c2cc28841389e22a72f77bae606622998e82" ] || ( echo 'Corrupt download' ; exit 1 )
    tar xzf qt-everywhere-opensource-src-5.5.0.tar.gz
    cd qt-everywhere-opensource-src-5.5.0
    ./configure -prefix "$QT_ROOT" -opensource -nomake tests
    make # -j4
    make install

Next we need to tell `cmake` where to find them.  If you have ever run CMake in this tree before, we must first delete some leftovers:

    make clean
    rm -f CMakeCache.txt
    find . -name CMakeFiles | xargs rm -Rf

To actually run `cmake` we now need the following parameters:

    cmake -DCMAKE_PREFIX_PATH="$QT_ROOT" -DCMAKE_MODULE_PATH="$QT_ROOT/lib/cmake/Qt5Core" -DQT_QMAKE_EXECUTABLE="$QT_ROOT/bin/qmake" -DBUILD_QT_GUI=TRUE \
          -DGRAPHENE_EGENESIS_JSON="$GENESIS_JSON" -DBOOST_ROOT="$BOOST_ROOT" -DCMAKE_BUILD_TYPE=Debug .

## Build Graphene 

    cd ..
    git clone https://github.com/cryptonomex/graphene.git
    cd graphene
    git submodule update --init --recursive
    cmake -DBOOST_ROOT="$BOOST_ROOT" -DCMAKE_BUILD_TYPE=Debug .
    make 

## Ubuntu 15.04
Ubuntu 15.04 uses gcc 5, which has the c++11 ABI as default, but the boost libraries were compiled with the cxx11 ABI (this is an issue in many distros). If you get build failures due to abi incompatibilities, just use gcc 4.9

   CC=gcc-4.9 CXX=g++-4.9 cmake .