At step 2 of the installation, System Check reports that the PDO Extension is installed (green check mark) and then reports that “Piwik requires either the mysqli extension or both the PDO and pdo_mysql extensions.” All other system checks appear to pass.
PHP 5.2.12 is compiled with ‘–with-mysqli=/usr/bin/mysql_config’ and ‘–with-pdo-mysql=/usr’. I am trying to install Piwik on a current gentoo (x86) server. It passes the simple test suggested by vipsoft.
My phpinfo() is attached.