Additional flags may be passed to Icarus Verilog and Verilator by use of the VFLAGS macro. Of particular use are the flags to generate a VCD trace:

make simulate VFLAGS=-DORPSOC_DUMP
make verilate VFLAGS=-trace
	

The target application is a Dhrystone simulation. The number of loops through this simulation can be set using the NUM_RUNS macro, which defaults to 1.

make verilate NUM_RUNS=100
	

	Note
	The software build is not sensitive to changes in the value of NUM_RUNS. If the value is changed, make clean must be used to force a recompile.