So Ruby 2.7 was released at Xmas'19 and I got some errors when compiling it in Linux Mint 19.1. Some libraries were not configured. The errors ocurred at the linking phase of make. Five libraries got errors, and I'll walk across their solutions:

• openssl:
  sudo apt install libssl-dev
• gdbm:
  sudo apt install libgdbm-dev
• dbm:
  sudo apt install libqdbm-dev
• readline:
  sudo apt install libedit-dev
• zlib:
  sudo apt install libz-dev
cd /lib/x86_64-linux-gnu/
sudo ln -s libz.so.1 liblibz.so