if [[ $MDDS_BRANCH == scm ]]; then
  depends autoconf &&
  depends automake &&
  depends libtool &&
  depends git
fi &&
depends -sub CXX gcc &&

optional_depends -sub "PROGRAM_OPTIONS SYSTEM THREAD" boost \
                 "--with-hash-container=boost"              \
                 ""                                         \
                 "to use Boost hash container"