1.3.7.0 build failure in Mageia

[barjac]

I maintain opencpn and it's plugin packages for Mageia.

I'm not sure what is causing this issue, which has appeared since the last couple of updates.

Here is a link to the problem build log which I hope will help to point to the cause:

http://mtf.duckdns.org/pub/linux/barjac/distrib/cauldron/x86_64/log/opencpn-squiddio-plugin-1.3.7.0-1.mga8_bcj.src.rpm/build.0.20200708192710.log

Errors are all similar to:

CMake Error at cmake/PluginConfigure.cmake:50 (string):
string sub-command FIND requires 3 or 4 parameters.