Autoconf is a package that supports software installation from source code.
https://www.gnu.org/software/autoconf/
Ubuntu / Debian
sudo apt install autoconf
CentOS
# install GNU M4
yum install m4
# install autoconf
wget http://ftp.gnu.org/gnu/autoconf/autoconf-latest.tar.gz
tar zxf autoconf-latest.tar.gz
cd autoconf-2.69/
yum install -y openssl-devel
./configure
make && make install
which autoconf
/usr/local/bin/autoconf
./configure
checking for a BSD-compatible install... /bin/install -c
checking whether build environment is sane... yes
°°°
checking for GNU M4 that supports accurate traces... configure: error: no acceptable m4 could be found in $PATH.
GNU M4 1.4.6 or later is required; 1.4.16 or newer is recommended.
install or update GNU M4 to newer version
yum install m4
GNU implementation of the traditional UNIX macro processor. M4 is useful for writing text files which can be logically parsed, and is used by many programs as part of their build process.
https://centos.pkgs.org/7/okey-x86_64/m4-1.4.16-9.el7.centos.x86_64.rpm.html