Install festival-dev by entering the following commands in the terminal:
sudo apt update sudo apt install festival-dev
Description:
Development kit for the Festival speech synthesis system
This package contains the static library and headers that can be used to develop programs that use Festival. Documentation is now contained in the separate festival-doc package.
Homepage: http://www.cstr.ed.ac.uk/projects/festival/
Version: 1:2.5.0-1
Section: universe/libdevel