The system I used is RHEL 7 with the Zabbix RPMS installed from the Zabbix SIA repository.
First install the PCP software and enable it:
# yum install pcpNext install the interface Zabbix agent library, this RPM is found in the RHEL 7 Server Optional channel:
# systemctl enable pmcd
# systemctl start pmcd
# yum install pcp-export-zabbix-agent
By default the Zabbix agent looks in a different directory for loadable modules, so let's create a symlink to fix:
# ln -s /usr/lib64/zabbix/agent/zbxpcp.so /usr/lib64/zabbix/modules/zbxpcp.soNext create a configuration file for the module. The following is the contents of the file found at this path; /etc/zabbix/zabbix_agent.d/zbxpcp.conf
LoadModule=zbxpcp.soNext test the agent, and if successful, restart.
# zabbix_agentd -t pcp.kernel.all.sysfork
pcp.kernel.all.sysfork [u|17068591]
Overall this was one of the more straight forward setups I've done in a while, and it all worked out of the box on RHEL!