For Power PC Linux 64 bits Little Endian, choose the additional extension, depending on the PHP you are using, into the following directory:
C:\Program Files (x86)\EasycomPHP\Linux_PPC_LE_x64
Modify the PHP.ini file according to the extensions selected.
Example for PHP 7.1:
extension= libI5comm7_1_2.so
extension= php_pdo_easycom7_1_2.so