configure: error: libdb_cxx headers missing, Datacoin Core requires this library for wallet functionality (--disable-wallet to disable wallet functionality)
You're missing the Berkeley DB packages.
Unix Build NotesI did everything as stated in the instructions, but at the stage of make I have an error.
https://i.postimg.cc/T3y6XSWK/Make-error.pngdistro: Linux Ubuntu 18.04.3 LTS