Tim, so many thanks for your quick reply.
OK, but all my others sketches (some of them with tons of other libraries) are compiled without issues, but maybe you are right and I now I have some trouble on my arduino IDE setup, this in that moment is a upgrade from other esp old core setups.
I give again a try with some clean arduino IDE and esp core install, and I report what I have, because I want maintain use your nice TimerFreeTone library.
Best regards
Jose.