Install libspiro-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libspiro-dev
Description:
library for curve design - development files
This library provides a mechanism for drawing smooth contours with constant curvature at the spline joins. . This package provides the runtime library's development files.
Homepage: https://github.com/fontforge/libspiro/
Version: 1:0.5.20150702-7
Section: universe/libdevel