[Iverilog-devel] Diagnostic messages to stderr

[<ni...@ly...>]

It would be nice if all vvp diagnostics, warning messages, and the like,
were sent to stderr. And stdout reserved for explicit output from $write
and $display.

E.g., when I'm simulating my toy cpu, I have a memory mapped tty
registers which read from stdin and write to stdout, and I have my own
debug output which (for now) is also are sent to stdout. My testcases
examine this output for various test programs and inputs. But my output
on stdout is mixed with other diagnostics from vvp, in particular, I see
the message

  WARNING: main.vl:93: $readmemh(examples/hello.hex): Not enough words in the file for the requested range [0:4095].

sent to stdout rather than stderr.

Regards,
/Niels


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