QUERY: CREATE FUNCTION circle_in(opaque)
   RETURNS circle
   AS '_CWD_/regress_DLSUFFIX_'
   LANGUAGE 'c';
NOTICE:ProcedureCreate: type 'circle' is not yet defined
QUERY: CREATE FUNCTION circle_out(opaque)
   RETURNS opaque
   AS '_CWD_/regress_DLSUFFIX_'
   LANGUAGE 'c';