Error installing memcache 3 on plesk php 7 - centos 7

I an trying to install memcache 3.0.x on plesk php7 alternate version.
System is a centos 7 / plesk 12.5.
Iwas unable to install due to the following error. Can anybody help?

#####ERROR###########
[root@webserver ~]# /opt/plesk/php/7.0/bin/pecl install memcache-beta
downloading memcache-3.0.8.tgz ...
Starting to download memcache-3.0.8.tgz (70,523 bytes)
.................done: 70,523 bytes
15 source files, building
running: phpize
Configuring for:
PHP Api Version: 20151012
Zend...

Error installing memcache 3 on plesk php 7 - centos 7