Install autoconf-doc by entering the following commands in the terminal:
sudo apt update sudo apt install autoconf-doc
Description:
automatic configure script builder documentation
GNU Autoconf is a package for creating scripts to configure source code packages using templates and an M4 macro package. This package contains the manual for GNU Autoconf.
Homepage: http://www.gnu.org/software/autoconf/
Version: 2.69-11
Section: doc