Annoying pop-up message

[David Squance]

This may be off-topic, but I don’t know if it’s related to my Mac OS or LC. Lately I get a periodic pop-up that says “The ‘C++filt’ command requires the command line developer tools. Would you like to install the tools now?” I have no knowledge of doing anything that uses the above command. I’m using the last version of LC prior to the big change away from freebies and haven’t attempted any standalone building for some time. I’m running Big Sur on a MacBook Air.
Dave