Complie with mingw32 error

./autogen.sh
./configure --prefix="$HOME/prebuilt" --exec-prefix="$HOME/prebuilt" --host=i686-w64-mingw32

Reporting Warning and can't compile with shadowsocks-libev
CC udns_dn.lo
CC udns_dntosp.lo
CC udns_parse.lo
CC udns_resolver.lo
CC udns_init.lo
CC udns_misc.lo
CC udns_XtoX.lo
CC udns_rr_a.lo
CC udns_rr_ptr.lo
CC udns_rr_mx.lo
CC udns_rr_txt.lo
CC udns_bl.lo
CC udns_rr_srv.lo
CC udns_rr_naptr.lo
CC udns_codes.lo
CC udns_jran.lo
CCLD libudns.la
libtool: warning: undefined symbols not allowed in i686-w64-mingw32 shared libraries; building static only
i686-w64-mingw32-ar: u' modifier ignored since D' is the default (see `U')