Automate process of using gcc5:

* SConstruct will set ABI based on ubuntu flavor
* Script to bring in packages for various ubuntu flavors
* Script to bring in packages for various fedora 22
* Remove unneeded environment variable from travis
* Script to build boost with correct API flags
* `--static` flag to control static linking

Builds/Fedora/install_rippled_depends_fedora.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+#
+# This scripts installs the dependencies needed by rippled. It should be run
+# with sudo.
+#
+
+if [ ! -f /etc/fedora-release ]; then
+    echo "This script is meant to be run on fedora"
+    exit 1
+fi
+
+fedora_release=$(grep -o '[0-9]*' /etc/fedora-release)
+
+if (( $(bc <<< "${fedora_release} < 22") )); then
+    echo "This script is meant to run on fedora 22 or greater"
+    exit 1
+fi
+
+yum -y update
+yum -y group install "Development Tools"
+yum -y install gcc-c++ scons openssl-devel openssl-static protobuf-devel protobuf-static boost-devel boost-static libstdc++-static

Builds/Ubuntu/install_boost.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+
+#
+# This script builds boost with the correct ABI flags for ubuntu
+#
+
+version=59
+patch=0
+
+if hash lsb_release 2>/dev/null; then
+    if [ $(lsb_release -si) == "Ubuntu" ]; then
+        ubuntu_release=$(lsb_release -sr)
+    fi
+fi
+
+if [ -z "${ubuntu_release}" ]; then
+    echo "System not supported"
+    exit 1
+fi
+
+extra_defines=""
+if (( $(bc <<< "${ubuntu_release} < 15.1") )); then
+    extra_defines="define=_GLIBCXX_USE_CXX11_ABI=0"
+fi
+num_procs=$(lscpu -p | grep -v '^#' | sort -u -t, -k 2,4 | wc -l) # pysical cores
+printf "\nBuild command will be: ./b2 -j${num_procs} ${extra_defines}\n\n"
+
+boost_dir="boost_1_${version}_${patch}"
+boost_tag="boost-1.${version}.${patch}"
+git clone -b "${boost_tag}" --recursive https://github.com/boostorg/boost.git "${boost_dir}"
+
+cd ${boost_dir}
+git checkout --force ${boost_tag}
+git submodule foreach git checkout --force ${boost_tag}
+./bootstrap.sh
+./b2 headers
+./b2 -j${num_procs} ${extra_defines}
+echo "Build command was: ./b2 -j${num_procs} ${extra_defines}"
+echo "Don't forget to set BOOST_ROOT!"

Builds/Ubuntu/install_rippled_depends_ubuntu.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+#
+# This scripts installs the dependencies needed by rippled. It should be run
+# with sudo. For ubuntu < 15.10, it installs gcc 5 as the default compiler. gcc
+# 5 is ABI incompatable with gcc 4. If needed, the following will switch back to
+# gcc-4: `sudo update-alternatives --config gcc` and choosing the gcc-4
+# option.
+#
+
+if hash lsb_release 2>/dev/null; then
+    if [ $(lsb_release -si) == "Ubuntu" ]; then
+        ubuntu_release=$(lsb_release -sr)
+    fi
+fi
+
+if [ -z "${ubuntu_release}" ]; then
+    echo "System not supported"
+    exit 1
+fi
+
+if [ ${ubuntu_release} == "12.04" ]; then
+    apt-get install python-software-properties
+    add-apt-repository ppa:afrank/boost
+    add-apt-repository ppa:ubuntu-toolchain-r/test
+    apt-get update
+    apt-get -y upgrade
+    apt-get -y install curl git scons ctags pkg-config protobuf-compiler libprotobuf-dev libssl-dev python-software-properties boost1.57-all-dev nodejs g++-5 g++-4.9
+    update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 99 --slave /usr/bin/g++ g++ /usr/bin/g++-5
+    update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.9 99 --slave /usr/bin/g++ g++ /usr/bin/g++-4.9
+    exit 0
+fi
+
+if [ ${ubuntu_release} == "14.04" ] || [ ${ubuntu_release} == "15.04" ]; then
+    apt-get install python-software-properties
+    echo "deb [arch=amd64] http://mirrors.ripple.com/ubuntu/ trusty stable contrib" | sudo tee /etc/apt/sources.list.d/ripple.list 
+    wget -O- -q http://mirrors.ripple.com/mirrors.ripple.com.gpg.key | sudo apt-key add -
+    add-apt-repository ppa:ubuntu-toolchain-r/test
+    apt-get update
+    apt-get -y upgrade
+    apt-get -y install curl git scons ctags pkg-config protobuf-compiler libprotobuf-dev libssl-dev python-software-properties boost-all-dev nodejs g++-5 g++-4.9
+    update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 99 --slave /usr/bin/g++ g++ /usr/bin/g++-5
+    update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.9 99 --slave /usr/bin/g++ g++ /usr/bin/g++-4.9
+    exit 0
+fi
+
+if [ ${ubuntu_release} == "15.10" ]; then
+    apt-get update
+    apt-get -y upgrade
+    apt-get -y install python-software-properties curl git scons ctags pkg-config protobuf-compiler libprotobuf-dev libssl-dev python-software-properties libboost-all-dev nodejs 
+    exit 0
+fi
+
+echo "System not supported"
+exit 1