Looks like when the RPM libraries were moved to %{l_prefix}/lib/openpkg/*.a, that Synaptic wasn't informed.
The attached patch takes care of this.
72a73 > ldflags="`%{l_rpm_config} --ldflags`" 84c85 < LDFLAGS="%{l_ldflags}" \ --- > LDFLAGS="%{l_ldflags} ${ldflags}" \
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