Spence Konde's cores use a compiler switch -DCLOCK_SOURCE. (See i.e.: .platformio\packages\framework-arduino-megaavr-megatinycore\cores\megatinycore\wiring.c:552)
In platform-atmelmegaavr/builder/frameworks/arduino.py:77 there is a typo: it's called CLOCKSOURCE instead of CLOCK_SOURCE.
valeros
commented
3 years ago
Spence Konde's cores use a compiler switch -DCLOCK_SOURCE. (See i.e.: .platformio\packages\framework-arduino-megaavr-megatinycore\cores\megatinycore\wiring.c:552) In platform-atmelmegaavr/builder/frameworks/arduino.py:77 there is a typo: it's called CLOCKSOURCE instead of CLOCK_SOURCE.