depends libffi '--with-system-ffi' &&
#depends expat "--with-system-expat" &&
optional_depends SSL  '' '' 'SSL crypto extension' &&
optional_depends gdbm '' '' 'database support' &&
optional_depends db "" "" "for Sleepycat db support" &&
optional_depends sqlite "" "" "for SQLite db support" &&
optional_depends tk "" "" "for Tk support" &&
optional_depends ncurses "" "" "for Ncurses support" &&
optional_depends readline "" "" "for Readline support" &&
optional_depends expat "--with-system-expat" "" "for XML parser module" &&

optional_depends -sub CXX gcc \
                 "--with-cxx-main=g++" \
                 "--without-cxx-main" \
                 "for C++ module support"
