Ok, here's what I ended up using:
{
"version": "0.2.1",
"defaults": {},
"configurations": [
{
"type": "dll",
"exe": "${cmake.installRoot}/Dwarf Fortress.exe",
"project": "CMakeLists.txt",
"projectTarget": "SDL.dll (Install)",
"name": "SDL.dll (Install)"
}
]
}
It kinda sucks because SDL.dll (install) is below the bottom of the list of possible startup projects, but it does the job.