Hi. I thought I'd not see you again. How are the martial arts?
We need drastic decrease of memory consumption, the staking loop can be rearranged as with pivx(?) (presstab did that change, he knows what to put where)
why decrease the memory ? Now Raspberry Pi have 4 GB RAM

try to compile for this ... put fail now

after make -f makefile.unix USE_UPNP=1 stop the compile after leveldb without a error

make[1]: Leaving directory '/root/hobonickels/src/leveldb'
found the fail ...
apt-get install libssl1.0-dev
I'm still testing this. I will contact you again if it should work with the Raspberry Pi 4
