build troubles

Hello Diez!
Do you have any makefile for build your scetch?

I try build this, but my experiment failed:

``` sh
[uart_dpi]$ verilator -sv --cc --trace uart_dpi.v --exe uart_dpi.cpp
%Error: uart_dpi.v:571: syntax error, unexpected |=, expecting '=' or <=
%Error: Exiting due to 1 warning(s)
%Error: Command Failed verilator_bin -sv --cc --trace uart_dpi.v --exe uart_dpi.cpp
```

best regards
Doka
