With just changing pool address to bitcoin pool u can start mining bitcoin.
For Ubuntu installation refer to my Mining Monero on Android video.
If your ARM cpu is different than mine (Exynos 7904 ARM 8.2 instruction set) then compiler options should be changed to corresponding ones. But u can make it run even without extra options for compiler in CGFLAGS.
Make a NOTE! CGFLAGS=“-O3” its not zero its capital letter o.
To mine in that poop you have to open an account and then punch in your ltc or btc wallet address and check miner settings. Replace my data with yours.
Happy ⛏ ⛏ ⛏