depends  raptor   "--with-raptor=system"      &&
depends  rasqal   "--with-rasqal=system"      &&
depends  libxml2  "--with-xml-parser=libxml"  &&
depends  SSL  "--with-openssl-digests"    &&

optional_depends  db                          \
                  "--with-bdb=/usr"           \
                  "--with-bdb=no"             \
                  "Sleepycat db support"      &&

optional_depends  sqlite                       \
                  "--with-sqlite=yes"          \
                  "--with-sqlite=no"           \
                  "Enable SQLite store"        &&

optional_depends  postgresql                   \
                  "--with-postgresql=yes"      \
                  "--with-postgresql=no"       \
                  "Enable postgresql store"    &&

optional_depends  MYSQL                        \
                  "--with-mysql=yes"           \
                  "--with-mysql=no"            \
                  "Enable Mysql store"         &&

optional_depends  virtuoso                    \
                  "--with-virtuoso=yes"       \
                  "--with-virtuoso=no"        \
                  'enable Virtuoso store'     &&

optional_depends  w3c-libwww                   \
                  "--with-libwww"              \
                  "--without-libwww"           \
                  "to use W3C libwww library"

.