Thanks for your reply.
Well that’s encouraging 
The only reason I’m trying to compile the source is that I’ve got Graphviz linked into my app; sometimes it works (I can actually get a graph), and sometimes Graphviz is crashing. Since no one replied to my post, I figure I had to step into the code myself.
I downloaded ver. 12.0.0, the last one with a Visual Studio .SLN solution file. I can compile it, but it’s missing header files, and now I realize I have to download GTK and Cairo. I already have Qt. Talk about a rabbit hole 
This is a classic “Yak shaving” situation. I just want to use the binaries and not have to recompile it.
Can I just pay someone to figure out why it’s crashing?
BTW I downloaded the source as you recommended. I can see the CMakeLists.txt files. What argument(s) do I pass to cmake?