Tested in Ubuntu, Verilator 3.9 and Icarus 10.1, both compiled from source.
Make and run all Verilog testbenches (*_tb.v) in Icarus:
make run-icarus
If any run fails, this prints an error message, and exit 1.
The output of every testbench is a *_tb.vcd file, which you can visualise with:
gtkwave negator_tb.vcd
Run just one Verilog testbench in Icarus:
make run-icarus-negator
Make and run all Verilator testbenches (*.cpp):
make run-verilator
Each one generates a VCD file of form:
negator.cpp.vcd
Make and run a single Verilator testbench:
make run-verilator-negator
Make an run testbenches for all tools:
make run