I am implementing a software (Getsy) that requires PHP 5.4 and ZendGuard 6 (ZendGuard).
For the occasion I am using an AWS Instance of Ubuntu 14.04. As Ubuntu 14.04
I had to configure with --enable-xdebug:
./configure --with-php-config=/opt/phpfarm/inst/bin/php-config-5.4.16 --enable-xdebug