Install gnustep-dl2-postgresql-adaptor by entering the following commands in the terminal:
sudo apt update sudo apt install gnustep-dl2-postgresql-adaptor
Description:
gnustep-dl2 adaptor to connect to PostgreSQL
This specific EOAdaptor project supports PostgreSQL 8.1 and higher . GNUstep Database Library Version 2 is needed by GNUstep applications that communicate with databases. It's an implementation of Apple's Enterprise Objects Framework (EOF) v 3.0 (from NeXT), and Apple's WebObjects 4.5 interface.
Homepage: http://www.gnustep.org/experience/GDL2.html
Version: 0.12.0-15.1build2
Section: universe/gnustep