./bjam -q                                           \
     ${BOOST_VARIANT}                             \
     runtime-link=shared                          \
     link=shared                                  \
     --prefix=${INSTALL_ROOT}/usr                 \
     --toolset=gcc                                \
     threading=multi                              \
     --layout=system                              \
     $OPTS                                        \
     install
if [[ ${INSTALL_BJAM} == y ]]; then
     install bjam /usr/bin/bjam
fi 
