This error is due to “phpize” command not available on your server.

To fix, install php-devel package.

If your server have yum (Eg: Fedora)

[root@localhost purab]# phpize
bash: phpize: command not found
[root@localhost purab]# yum -y install php-devel

[root@localhost purab]# phpize
Cannot find config.m4.
Make sure that you run ‘/usr/bin/phpize’ in the top level source directory of the module

[root@localhost purab]#
How to install the eaccelerator on fedora9?
use follwoing command

[root@localhost purab]# yum install php-eaccelerator