moog/source.cpp: emulating envelope generators and LFO timing.

[m1macrophage]

Used netlists for the simulation of the voltage-to-current converters. The resistor networks in these circuits are non-trivial, requiring solving a system of equations, and the transistors are used in their exponential region. Netlist use is confined to those complex DC calculations.

[Lord-Nightmare]

There's a small issue here: the way nl_source.cpp is linked sort of works by accident, since there's no nl_source.h included by source.cpp to let the compiler know that it needs to link in nl_source.cpp (this will break single-driver builds).

The solution, as far as I can tell, is to remove the line

NETLIST_EXTERNAL(moogsource)

from source.cpp and instead put it in its own file, nl_source.h, which will be #include'd from source.cpp.
nl_source.h would be something like:

// license:BSD-3-Clause
// copyright-holders:m1macrophage

NETLIST_EXTERNAL(moogsource)

and that's it.

[m1macrophage]

Sent #13680

I tried a single-driver build, and the presence of the .h file didn't seem to make a difference. In both cases, I had to include nl_source.cpp in the files {...} section for linking to work. But maybe I missed some step, or this is just an issue with different setups.

Regardless, your suggestion matches the standard way to do things, so better to go with that anyway.