Boost automated build script

boost_build.sh

#!/usr/bin/env bash

set -o xtrace

# https://dl.bintray.com/boostorg/release/1.68.0/source/boost_1_68_0.tar.gz
BOOST_MAJOR_VER="1"
BOOST_MINOR_VER="68"
BOOST_PATCH_VER="0"
BOOST_VER="${BOOST_MAJOR_VER}.${BOOST_MINOR_VER}.${BOOST_PATCH_VER}"
BOOST_VER_US="${BOOST_MAJOR_VER}_${BOOST_MINOR_VER}_${BOOST_PATCH_VER}"

if [ ! -f "${PWD}/boost_${BOOST_VER_US}.tar.gz" ]
then
    wget https://dl.bintray.com/boostorg/release/${BOOST_VER}/source/boost_${BOOST_VER_US}.tar.gz
fi

if [ ! -d "${PWD}/boost_${BOOST_VER_US}" ]
then
    tar -xvf "${PWD}/boost_${BOOST_VER_US}.tar.gz"
fi

#The Boost libraries requiring separate building and installation are:
#    - atomic
#    - chrono
#    - container
#    - context
#    - contract
#    - coroutine
#    - date_time
#    - exception
#    - fiber
#    - filesystem
#    - graph
#    - graph_parallel
#    - iostreams
#    - locale
#    - log
#    - math
#    - mpi
#    - program_options
#    - python
#    - random
#    - regex
#    - serialization
#    - signals
#    - stacktrace
#    - system
#    - test
#    - thread
#    - timer
#    - type_erasure
#    - wave

cd boost_${BOOST_VER_US}
./bootstrap.sh --prefix=/opt/boost${BOOST_VER_US}
./b2 install  --prefix=/opt/boost${BOOST_VER_US} \
    --without-wave \
    --without-python \
    --without-graph \
    --without-graph_parallel \
    --without-fiber \
    --without-test \
    link=static variant=release threading=multi cxxflags="-fPIC"