Install libgretl1-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libgretl1-dev
Description:
GNU Regression, Econometric & Time-Series Library -- development package
The GNU Regression, Econometric and Time-Series Library (gretl) is a software package for econometric analysis. The package comprises a shared library, a command-line client program, and a graphical client built using GTK+. . This package provides the static library and header files.
Homepage: http://gretl.sourceforge.net/
Version: 2017d-3build1
Section: universe/libdevel