It seems that Wolf's cpuminer-multi only allows to connect to a mining pool and can't be used for solo mining.
I've tried to use
-o daemon+tcp://: to have it connect to
monerod but it doesn't work.
Can cpuminer-multi be configured to mine solo?
Wolf0's CPU miner does not contain any code to support the fairly new daemon+tcp scheme, so cannot be used to solo mine.
However, you could setup your own private pool, and connect to it.If you disable payouts, this is as close to solo mining as you can get without being standard solo mining.
You need my patched version of Wolf's miner https://github.com/hyc/cpuminer-multi/tree/daemon