Looks like somewhere down the line the pmda's for pcp fell out of the distro?

The pmcd config (in /var/lib/pcp/config/pmcd/pmcd.conf) shows that pmcd expects 2 pmda's

bypass:/var/lib/mooty # cat /var/lib/pcp/config/pmcd/pmcd.conf
# Performance Metrics Domain Specifications
# This file is automatically generated during the build
# Name Id IPC IPC Params File/Cmd
pmcd 2 dso pmcd_init /var/lib/pcp/pmdas/pmcd/pmda_pmcd.so
linux 60 dso linux_init /var/lib/pcp/pmdas/linux/pmda_linux.so

yet the whole /var/lib/pcp/pmdas directory is missing

- any clues anyone?