checking package dependencies
compiling Ifc_Clock_Case.bsv
code generation for sysIfc_Clock_Case starts
Error: "Ifc_Clock_Case.bsv", line 11, column 4: (G0067)
  The expression for a clock could not be evaluated. Clocks must be determined
  at compile time and cannot be computed dynamically.
  During elaboration of the interface output clock `clk_out' at
  "Ifc_Clock_Case.bsv", line 6, column 8.
  During elaboration of `sysIfc_Clock_Case' at "Ifc_Clock_Case.bsv", line 6,
  column 8.