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"
