What is your host Operating System? If it is *nix then it is basically the same to configure and install.
Download the latest version from github, https://github.com/eaccelerator/eaccelerator
Make sure to install php5-dev packages
Untar the archive you downloaded,
Make sure you are root or run as sudo the below
CD to the untar'd directory, then run in order; phpize , ./configure , then lastly make.
After you run those commands the .ini file will be in /etc/php5/conf.d/eaccelerator.ini.
The documentation for eAccelerator on Moodle Docs says to run make install but you do not need to, after you run phpize, ./configure , and just make that is all you need to do.
Let me know which OS you have and I can point you into the right direction, I use Ubuntu Server 12.04 following docs are found here, https://help.ubuntu.com/community/eAccelerator , Always download the latest version from github not necessarily the version on the documentation.