depends  pkgconfig  &&
depends -sub CXX gcc        &&

if [[ $JACKDMP_VCS != y ]]
then
  depends  alsa-lib
else
  depends  scons  &&
  depends  expat  &&

  message  "${MESSAGE_COLOR}The ALSA backend is necessary"  \
           "for sound card support.$DEFAULT_COLOR"          &&

  optional_depends  alsa-lib                     \
                    "ENABLE_ALSA=yes"            \
                    "ENABLE_ALSA=no"             \
                    "to build the ALSA backend"  &&

  optional_depends  doxygen                   \
                    "BUILD_DOXYGEN_DOCS=yes"  \
                    "BUILD_DOXYGEN_DOCS=no"   \
                    "to build documentation"  &&

  optional_depends  dbus               \
                    "ENABLE_DBUS=yes"  \
                    "ENABLE_DBUS=no"   \
                    "to enable the D-Bus control interface"
fi