optional_depends  pcre  "--enable-pcre"  "--disable-pcre"   \
                  "enable the search for the pcre library"  &&
optional_depends  libcap  "--enable-cap"  "--disable-cap"   \
                  "enable search for linux capabilites"     &&
optional_depends  gdbm    "--enable-gdbm" "--disable-gdbm" \
                  "enable gdbm database bindings"           &&
depends  ncurses
