Install libgpr1-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libgpr1-dev
Description:
support for programs processing GNAT projects (development)
GNAT projects are human-readable text files used to drive tools building or inspecting lots of source files in several programming languages, like those provided by the gprbuild package. . This package contains the development tools.
Homepage: http://libre.adacore.com/libre/
Version: 2017-5
Section: universe/libdevel