optional_depends libdynamite \
                 "--with-libdynamite" \
                 "--without-libdynamite" \
                 "for cab extraction support"

optional_depends libgsf \
                 "--with-libgsf" \
                 "--without-libgsf" \
                 "for ole type support"

optional_depends unshield \
                 "--with-libunshield" \
                 "--without-libunshield" \
                 "additional cab extraction support"

optional_depends libsynce \
                 "--with-libsynce" \
                 "--without-libsynce" \
                 "for some SynCE support"
