issue in forking bitcoin 0.12 and internal miner

issue in forking bitcoin 0.12 and internal miner

For education purposes I am working on a bitcoin fork which enables the cpu mining. By looking in internet i've learned that internal miner was removed from bitcoin codebase since the version 0.13. So i have forked the version 0.12.1 and i have edited the chainparam.cpp file to make my altcoin.

I've maked my code everything is ok but when i try to mine using setegenrate true 4 or -gen=1 it won't mine.

when i try getmininginfo i get these outputs showing 0 mined block :

{
  "blocks": 0,
  "currentblocksize": 0,
  "currentblocktx": 0,
  "difficulty": 1,
  "errors": "",
  "genproclimit": 1,
  "networkhashps": 0,
  "pooledtx": 0,
  "testnet": false,
  "chain": "main",
  "generate": true
}

http://ift.tt/2zYjuiq