#include <util/atomic.h>

[BurritoKitten]

Whenever I try to build, i get the following error:

.pio/libdeps/supermini_esp32c3/Dimmer/src/Dimmer.cpp:10:10: fatal error: util/atomic.h: No such file or directory
10 | #include <util/atomic.h>
| ^~~~~~~~~~~~~~~
compilation terminated.

I get an identical error message whether I install via the library manager of my up-to-date platformIO intall, or my out of date Arduino IDE install.

This is when trying to run the default 'Fade' example.

Any help at all would be greatly appreciated. Thank you for your help.