optional_depends openssl "--with-openssl" "--without-openssl" "For SSL support"
optional_depends libxml2 "--with-libxml"  "--without-libxml"  "For xml support"
optional_depends zlib    "--with-zlib"    "--without-zlib"    "For compression support"
optional_depends libpng  "--with-libpng"  "--without-libpng"  "For png graphics support"
optional_depends tiff    "--with-libtiff" "--without-libtiff" "For tiff graphics support"
optional_depends tcp_wrappers "--with-libwrap" "--without-libwrap" "For TCP wrapper support"
