Set properties of VHDL package file from component TCL file

Ah, yes, I have had to solve that one too ... the following is just typed in (so the VHDL syntax might be slightly wrong):

package simulation_pkg is
     function simulation returns boolean;
end package simulation_pkg;
package simulation_pkg body is
     function simulation returns boolean is
         variable result := false;
     begin
        -- altera translate_off
        result := true;
        -- altera translate_on
        return result;
     end function;
end package simulation_pkg body ;