The development release of a program source code often comes with autogen.sh which is used to prepare a build process, including verifying program functionality and generating configure script. This autogen.sh script then relies on autoreconf to invoke autoconf, automake, aclocal and other related tools.
The missing aclocal is part of automake package. Thus, to fix this error, install the following package.
On Debian, Ubuntu or Linux Mint:
$ sudo apt-get install automake
On CentOS, Fedora or RHEL:
$ sudo yum install automake
